Grassroots Motorsports $2018 Challenge Rules


Read all the rules and still have questions? Check out our Rules FAQ at the bottom of the page.

The Basics:

This event is meant to be a fun editorial exercise so Grassroots Motorsports can show its readers what creative people can do with a car, their hands and a little cash. Cars found in violation of the spirit of the event may run for exhibition.

Competition Venue:

The competition will cover three different arenas: autocross, drag racing and concours judging. 

The autocross will follow standard autocross rules. Each cone knocked over adds a 2-second penalty to the run time. An entry’s fastest single run (regardless of driver) will be used for scoring. Entries will be guaranteed a minimum number of runs TBD prior to the event start time based on entry numbers.

We will again offer pro drivers for those who are not Mario Andretti. Entries will be guaranteed a minimum number of pro driver runs; this number is TBD based on final entry tally and will be announced prior to the event start time.

Pro drivers, and entries that have made fewer than their guaranteed minimum number of runs will be given priority access in staging lanes.

The drag racing will follow standard drag racing practices. Competitors will be given ample time for drag race runs, with their quickest elapsed time counting.

Red light runs will not be counted. Runs that are completed in violation of NHRA rules will be not be counted. (See “Safety” section of the rules for more information.)

Since the drag racing will again take place after dark, all entrants must have at least one operational headlight and at least one operational taillight. 

The third venue will be concours judging. Cars will be parked in a centralized location, with hoods, trunks and doors opened for the judges and competitors to view. Entrants will have 3 minutes maximum to present their cars and share their story with the judges. If we like you and/or your story, some bonus time may be awarded. Cars will be judged on innovation, execution and presentation, and scoring will be as such:

Innovation: 0-10 points

Execution: 0-10 points

Presentation: 0-5 points

“Innovation” covers things like design, engineering, creativity and modifications.

“Execution” covers things like cleanliness, workmanship and attention to detail.

“Presentation” covers things like originality, theme, showmanship, team spirit, moxie, chutzpah, backstory and anything else that falls under the heading of “je ne sais quoi.”

Any entrant that does not want to go through the concours judging process may decline to be judged by writing "Don't Judge Me" on a piece of tape placed on the upper driver-side corner of the windshield of their car. Cars properly displaying this message that are parked in the centralized concours judging location for the duration of judging will be awarded 12 concours points. 



Entry fee will be $195 for the entrant and vehicle and 1 banquet ticket. Each additional teammate/driver/banquet ticket costs $75. Thirty days prior to the event, the entry fee shall go up to $245. Cancellations will be credited to the next year’s entry.

All drivers shall have a valid state-issued driver’s license and be at least 16 years of age. All passengers shall be at least 16 years of age.

Eligible Vehicles:

Any four-wheeled, production-based vehicle that was originally sold as a passenger vehicle is allowed. (You know what this means, but generally speaking we’re going to want to see production frame rails or equivalent unibody structures.) Vehicles that don’t fit this category or exceed budget may be run for exhibition only at the event chairman’s discretion.)

We do not intend to exclude any past Challenge cars with these new rules. If you believe that your past Challenge car meets the spirit of the rules but not the exact letter of the new law, contact us to discuss grandfathering in your entry.


Net cost of the Challenge car and its preparation for presentation at the event must be equal to or less than a dollar amount equaling the year of the competition. Your purchase price of the Challenge car cannot top that year’s budget cap. 

Up to half the total annual budget may be recouped by selling parts originally included with or attached to the Challenge car, related parts car(s), or related parts packages at the time of purchase. You may not factor gains or losses made from buying, selling or trading unrelated parts into your budget. 

You may never recoup more than a part or car’s purchase price or fair market value (whichever value you listed on your budget sheet.) You may not list fair market value instead of purchase price on your budget unless you do not have a receipt from the purchase, or depreciation/appreciation has drastically affected the car or part’s value.  Free parts must be known to and available to the public (eg. sitting in a ditch on the side of the road). “Free” parts given to you by a friend must be added to the budget at fair market value.

In English, what does this mean?

For 2018, the budget cap is $2018.

For 2018, the most you can recoup through parts sales is $1008.50.

For 2018, the max you can initially pay for a Challenge car is $2018.

If you buy a part for $40, decide it won’t work, then resell that part for $50, you may not recoup $10. Leave this unrelated transaction out of your budget sheet entirely.

If you buy an engine for $100, use the heads on your Challenge car, then resell the rest of the engine for $80, you may recoup $80, assuming your build has not already hit the recoup limit.

If you buy an engine for $100, use the heads on your Challenge car, then resell the rest of the engine for $300, you may recoup $100, assuming your build has not already hit the year’s recoup limit.

If you bought an engine last week for $800, but the fair market value is actually $200, you must still add it to your budget at $800. 

If, 30 years ago, you bought an engine for $800, you may add it to your budget at today’s fair market value if you desire to.

Fluids (including gasoline, oil and brake fluid) are not required to be included in the budget. Nitrous oxide refills do not count toward the budget (however, the cost of the equipment that comes along with a nitrous setup does need to be added to the budget). Nominal amounts of grease (such as what’s required to pack bearings) do not need to be included in the budget. 

Costs to pick up your hooptie from the seller are exempt.

Title fees and so on, in case you bothered, are exempt.

Shipping counts toward parts prices. Sales tax does not.

These safety items are budget-exempt: seat belt or harness; fire extinguisher; roll bar padding; wheel lugs, studs and bolts, and four tires. Brake friction materials, lines, calipers, master cylinders, rotors and drums may be replaced with fresh ones that are functional duplicates. The purpose of this rule is to allow for fresh brake components, not to allow for budget shenanigans. For example, original brake parts cannot be sold and then re-bought to take advantage of this allowance.

The Reese Rule: SFI-approved harmonic balancers, SFI-approved flywheels and SFI-approved flex plates are budget-neutral. These parts are dangerous rotating assemblies that should be treated with respect. Any intact harmonic balancer, flywheel, or flex plate listed on the budget may be exchanged for a duplicate SFI-approved part without increasing or decreasing the budget. “Duplicate” is defined as having the same listed application as the standard part in a major parts catalog. In situations where a standard part is not present to exchange, fair market value of the standard part may be used.

SFI-approved transmission shields, SFI-approved flex plate shields, and SFI-approved bell housings are not rotating parts, and are not budget exempt. You may still be required to use one or all, depending on your car’s construction and E.T. in the drags.

Any inside deals—parts, whole cars, trades, donations, stolen parts, etc.—must be added to the budget at fair market value. If you can’t figure out the value of a part, ask on the message board at

Labor you perform yourself does not count. Any labor you pay for counts. If you run a shop and your paid employees work on the car, then it counts.

The Stampie Rule: We’re sorry that your car is having an issue at the event, but we can no longer turn a blind eye so you can get back in the game. Parts borrowed at the event must be added to the budget at purchase price or fair market value. If two builds elect to share parts at the challenge, such as a set of wheels and tires, then the parts must be included in both builds’ budgets at the full purchase price or fair market value.

Crapcan Clause:

24 Hours of Lemons race cars are automagically legal, provided they meet the spirit and intent of our rules.


If a competitor or competitors feels that another competitor has skirted the safety or budget rules, a protest should be lodged. Protests should be lodged in a timely fashion, with none being accepted later than two hours before the start of the awards banquet.

Step 1: Notify the event chairperson that you intend to lodge a protest.

Step 2: Deposit $50 cash with the event chairperson.

Step 3: Clearly and concisely describe the competitor you’re protesting and the part or practice you feel is in violation of the rules.

After fulfilling these steps, the GRM staff will assess the vehicle in question. If the protest is valid, the car in question is penalized at GRM’s sole discretion and the protestor(s) deposit is returned. If the protest is not valid, the protestor(s) forfeit their deposit.


Cars should have a finished appearance. Use good sense and taste when you modify your car, as missing grilles, headlights, fenders, hoods and the like are generally unattractive. Cars that are ugly will be less likely to be featured in the magazine and other media. Please remove your front license plate and plate holder, as those things are ugly, too.

GRM will provide required number panels to all entrants. If you have a theme that doesn’t work with these panels, then concessions can be made. Please discuss with the GRM staff prior to the event.

Sponsors make this event possible, so GRM reserves the right to require a windshield banner, as well as the right to require that competing companies’ decals be removed or covered during the event.


All entrants shall provide a three-ring binder (referred to as the “build book”) to GRM at registration. Each build book must contain, in this order:

A single, large photo of the car (the more recent, the better).
Your completed vehicle information form.
On one page, a list of the first and last name of every team member, along with their role on the team (eg. Rick Goolsby: Welder).
The story of your build. Use as much text and as many photos as it takes to explain how and why you built the car you built.
Complete build budget on GRM-provided spreadsheet template. Minimum font size is 12pt typed. Handwritten budgets will not be accepted. 
Every receipt referenced in the budget. Photocopies are acceptable. 
Supporting documentation for every fair market value calculation used in the budget.

Number panels will be issued once your completed build book is received. Build books will be available for public viewing throughout the weekend at the GRM booth. During the concours, build books will be handed out for display with each car. Each team must return their build book at the conclusion of the concours.

Click here to download the GRM budget spreadsheet template, which includes an example budget on sheets three and four to show how the template should be filled out. When printing your budget for your build book, please print only sheets one and two, not the example sheets. Please do your best to print your budget in a readable form–ex. not spread across 15 pages, and not including 100 unused rows. If you do not have Microsoft Excel, free alternatives are available that can open this spreadsheet. We suggest Google Sheets or Apache OpenOffice. Budget documentation questions can be answered via email:


The following will be required: all lug nuts present; two functioning throttle return springs; positive battery tie-down; properly operating brakes; wheel bearings free of excessive play; properly secured seat; and tires free of any exposed cords or other defects. Additionally, all loose items shall be removed from the interior, and open cars running non-DOT race slicks must have approved rollover protection and arm restraints. Cars that do not meet the SCCA’s Static Stability Factor will not be allowed to run. 

Drivers must wear a helmet at all times. NHRA rules require drivers wear a SFI 3.2A/1 Jacket or better in vehicles equipped with non-OEM nitrous oxide, turbochargers or superchargers that run a 13.99 or faster E.T.

We want to see safe cars. We don’t want to send anyone home without getting to compete. Building something radical and not personally familiar with the NHRA standards? Tech inspection at the track isn’t the place to learn.

Please discuss your build with GRM staff ahead of time so you arrive with something that is safe and meets the NHRA regulations. Does it have a suitable firewall? Did the welding properly penetrate the metal? Is the harness properly attached? Is the roll bar suitable? Is a legal windshield present? Is your new layout safe and sound?

We recommend you have the car inspected locally and ahead of time by a qualified SCCA or NHRA inspector so no surprises crop up at the event. Failed cars will be reinspected after fixes are made. Entries that fail onsite tech inspection will not be allowed to run.

Cars must meet the safety requirements of the SCCA Solo program while running the autocross, and the NHRA when running the drag strip. Your safety prep level will limit your drag race times. To discourage bonzai runs, cars that run quicker than their safety prep level allows will not be given a time for that pass, and may be barred from future drag passes. Five-point roll bars meeting item 4:10 of the NHRA's general safety regulations are mandatory in all open-top cars running a 13.49 E.T. or faster. For a summary of NHRA’s safety rules, click here.

From the NHRA rulebook: If no specific Protective Clothing requirements are stated for a particular class, then the minimum requirements are as follows: full-length pants; short- or long-sleeved shirt; closed shoes; and socks. No shorts. No bare legs. No bare torsos. No tank tops. No open-toe or open-heel shoes or sandals. Synthetic clothing not recommended.

Those in the drag strip’s staging area shall follow the above clothing requirements. 

Autocross safety regulations will follow the SCCA Solo rulebook. Access it by clicking here. 

Teams that lose a wheel or send any other large or heavy item flying from their car will be disqualified from the event.


The dynamic score from the challenge will be calculated by adding the competitor’s fastest drag time and fastest autocross time together. This will give their “dynamic time.”

The lowest dynamic time is worth 100 points. Points for second and subsequent places are determined by dividing the winning time by each other time, then multiplying by 100.

For example, if the winning combined dynamic time is 74.2 seconds and second place is 75.0 seconds, the 74.2-second driver receives 100 points, while second place gets 98.9 points (74.2/75.0 = .989 x 100 = 98.9).

The maximum concours score is 25 points. The maximum possible total score is 125.

Highest score wins the overall trophy. The team that takes the overall win will receive free Challenge entry for the following year.

Rain-Outs and Other Excuses:

Your first run will be first come, first served. If you were unable to compete in any portion of the event because of mechanical failure, bad sleep habits, ennui or any other reason, you will be given an arbitrary score of 99.99 for timed events, or 0 for the concours.

If any part of the event is rained out, struck by a meteor, invaded by a flashmob of Michael Jackson impersonators, or otherwise seriously disrupted so that more than half the entrants don’t get a chance to compete, GRM staff may choose to discard that portion of the event from the final scoring. 


GRM reserves the right to issue competition bulletins at a later date.

One Final Word:

Remember, this event is all about having fun and being creative, and these rules supersede the ones from past Challenges. Have a question about the event? Just ask.




Rules FAQ


Q: What if I got four autocross tires for free, and bought 4 drag tires for $200? Can I claim my drag tires as my “free” set.

A: In this case, you may technically be able to claim all eight tires as free. However, remember that free parts must be known to and available to the public (eg. sitting in a ditch on the side of the road). A second set of tires that was given to you by a friend or acquired via any other non publicly-available transaction must be budgeted at fair market value.


Q: I want to put a T56 transmission into my Honda Civic, and I know that I need a stock flywheel from a Camaro. Because SFI-approved OEM-replacement flywheels are budget exempt, I can buy a new SFI-approved Camaro flywheel and value it at $0 on my budget, right?

A: No, that is not correct. In this scenario, you may exchange the Camaro flywheel for an SFI part. Bought an OEM Camaro flywheel for $20? Include that receipt in your budget, then you may use an SFI-approved Camaro flywheel without any additional budget impact. If you don’t currently own an OEM Camaro flywheel, you may list its SFI-approved replacement at the standard part’s fair market value on your budget.


Q: Can I run an over-budget car just for fun?

A: If your Challenge car fails to make the event due to technical, logistical or metaphysical issues, we may allow teams to run an alternate vehicle for exhibition. Please do not register a rental car or other extremely over-budget car for exhibition if you never intend to build a Challenge car.


Q: Can I field a car by myself?

A: Yes, one-person teams are welcome.


Q: Can I camp at the track?

A: Sorry, no camping allowed at the track. 


Q: Is there fuel available at the track?

A: Yes, the track sells race fuel. Hours are limited, so plan ahead.


Q: Are media passes available?

A: They certainly are. Contact David Wallens for details. 


Q: May I drink alcohol at the track?

A: No alcohol may be consumed at the track. This goes for drivers, crew and spectators.


Q: Is there power available at the track?

A: There is very, very limited available power, so plan ahead.


Q: Is there compressed air available at the track?

A: Yes, there is. 


Q: May I grill at the track?

A: Yes. And remember that the staff is often hungry. 


Q: It seems like a few of the NHRA rules will make my fairly average car illegal. What gives?

A: We realize that the rulebook has a few issues when it comes to this event. The following rules may be ignored if your car runs slower than 11.49 E.T.:

  • Windows must be rolled up during drag runs (if you don't have windows, you'll be required to wear a full-face helmet).

  • Welded differentials prohibited.

  • Mandatory C-clip eliminators. 

  • Partially excepted: Battery shutoff switches. Alternative construction and placement acceptable. Must remain within driver's and first responder's reach and be clearly labeled on the exterior of the vehicle.

Q: Do I need a master battery kill switch if I relocate the battery?

A: Yes, battery kill switches allow alternative construction and placement, but must remain within driver and first responder’s reach and be clearly labeled on the exterior of the vehicle.


Q: Do I need operating headlights/taillights for the drag racing runs?

A: Yes, when the track gets dark you are required to have at least one operational headlight and taillight in place.


Q: For my budget exempt set of tires, is the cost of mounting and balancing them included in that exemption?

A: Mounting and balancing does not count towards your build budget, but only for that set of budget exempt tires.


Q: Can normal wear and tear items that were in good condition at the time of purchase be repaired without counting against my budget?

A: Yes, but within reason and at the staff’s discretion. I.E. if you purchase a car knowing a part will fail soon and get a discount because of it, prepare to budget that cost into the build.


Q: Can I use a hand-actuated clutch since my car is powered by a motorcycle drivetrain?

A: Yes, so long as the car is not running a ¼ mile time faster than 13.49 ET.


Q: NHRA rules specify that I need a back brace in my drag car, can I run without that in place?

A: Yes, so long as the car is not running a ¼ mile time faster than 13.49 ET.


Q: Do I need an NHRA-approved roll bar or will an SCCA-approved roll bar be sufficient?

A: An SCCA or road racing roll bar is sufficient, so long as the car is not running a ¼ mile time faster than 13.49 ET in which case an NHRA-spec roll bar is required.


Q: Can I run my factory cast iron flywheel?

A: Yes, unless your car is running faster than an 11.49ET in which case it must follow NHRA rules.


Q: Can my car have a traction control system?

A: Yes, TCS is allowed.


Q: If I zero out my car’s budget by selling parts, am I still allowed to trade other parts off of it?

A: Yes, but you cannot profit off of parts sales if the budget is zero


Q: If a new rule comes out which would outlaw my past Challenge car this year, do I have to modify it to meet the new criteria to be legal?

A: This is a case-by-case basis, but rule changes are rarely severe enough to prevent prior entries from returning.


Q: I do not have a receipt for my parts purchase from a forum member, swap meet, etc., what can I do?

A: A picture of the sales thread or swap meet price tag is acceptable, judged by a jury of your peers for accuracy and eligibility.


Q: If I negotiate a crazy good trade deal and it is recorded properly, i.e. trading my used challenge car fuel pump for a brand new Nitrous kit, is that against the spirit of the event?

A: Actually, trades like that are a way to build a fast Challenge car and are condoned.


Q: Am I allowed to trade with myself if the parts traded have an equal FMV?

A: Certainly, it should be noted in your build with a total of $0.


Q: Can I “sell” parts back to myself at FMV?

A: Yes, but this requires strong supporting documentation of the part’s FMV.


Q: If I buy a previous challenge car for less than its budget, does my build budget change to match the purchase price?

A: Yes, your budget disregards what previous owners paid. The current budget is $2018 – (purchase price of car).


Q: How do I determine the price of parts I got as a lot or an all-you-can-carry sale?

A: This is treated as a “parts car” so to speak, the total price of the lot is what it will cost your budget. You may then sell parts from that total lot or group of parts with receipt until you hit the recoup limit.


Q: If I’m super cool and cast/forge/machine my own parts for the car, what will they cost towards my budget?

A: The cost is simply whatever materials are physically on your car while running the event. Even if it takes a $7,500 CNC machine to turn $12 of steel into a part, the total budget for that part is $12.


Q: I’m doing a brake swap to incorporate disk brakes, are wear/safety items part of the total budget as well i.e. brake hoses?

A: If the components are the same, as in you replace the hoses with the similar type used on the original drum brakes, that is fine. If you replace it with a $500 custom hose to make it happen, that will affect your budget.



Q: Do we need all street equipment i.e. windshield wipers, all running lights, antennae, etc?

A: No, all we are looking for here is a finished appearance.


Q: Can I run an adapter between an engine and transmission of two different makes?

A: Yes, even a homemade adapter is fine. Just remember if it runs faster than 11.49 seconds in the quarter-mile, it will need to meet all NHRA rules.


Q: If the windshield is cracked on my project car, does it need to be replaced in order to run?

A: Yes, for safety all cracked windshields must be replaced.


Q: Does my build book or presentation about the build count against the total budget?

A: No, go nuts! Just be sure your build book follows the approved format.


Q: Say I own a shop, and my employees help me work on a project car. I still want to pay them so they don’t have to clock out. Does their pay count into my budget?

A: Yes, at that point you are paying a professional to work on your car and it must be counted in the budget.


Q: Does the total height of my challenge vehicle have to be less than the track of the tires, measured from center to center?

A: Yes, and that height is calculated including roof accessories such as roof racks, wings, etc.


Q: If I went to purchase a part and the seller gave me a discount because it was going on a Challenge car, does that affect the build price?

A: This is the same as negotiating. If the seller decides that his $50 is a gift, it’s free to you!


Q: Can I use a hood stack, a short exhaust pipe out of the manifold or turbo through the hood?

A: No, hood stacks are not allowed.


Q: Can I claim a free car as a $0 budget and what can I recoup towards the limit from it?

A: The car starts at $0, but you cannot recoup money from a transaction that cost you nothing to begin with.


Q: I am running a previously entered $2k Challenge car, can I use the original budget spreadsheet for that car when I enter it again?

A: No. All budgets must use the standardized spreadsheet.


Q: If I buy two cars in order to build a Challenge entry, can I sell parts off of both cars in order to recoup?

A: Yes, but the purchase price of both cars must be factored into your total budget.


Q: Is there a sound decibel limit on my Challenge car?

A: No


Q: Can I recoup the cost of my car by recycling parts off of it?

A: Yes


Q: Can I spend more on my parts car than the actual Challenge entry so long as both are below $20XX?

A: Yes.


Q: I acquired my car by a transaction outside of simply paying for it, i.e. I bought the previous owner dinner and paid for the gas to tow it. Is this car free?

A: The car costs as much as the gas and dinner did, with receipts!


Q: Do the cost of build consumables like welding wire count towards my budget?

A: Yes, they can also be pro-rated in order to cut down on total cost (i.e. cost per foot of welding wire vs. the entire spool if it is not used.)


Q: What kind of roll bar does my convertible car need?

A: To participate in drags, at anything faster than 13.49ET your car will need a five-point roll bar.


Q: Are window nets exempt from my budget as a safety equipment item?

A: No


Q: Can I register my ChampCar in The Challenge?

A: Yes, as long as it meets all Challenge rules including budget restrictions, it is welcome to run.


Q: Can I run a short exhaust such as bullhorn, open downpipe, or side exit at the front of the vehicle?

A: Exhaust must exit out of body to rear of car. By definition it cannot come out of the front bumper pointing forward, or out of the side of the car without a bend directing exhaust gasses to the rear of the car. You cannot blow exhauast at the driver, or a competitor in the other lane.


Q: If I was forced to purchase a fixed lot of parts from a seller but only need to use a few, what is the best way to record the value of the used parts? What will they cost if the original price was for the lot?

A: The best way to do this is purchasing the lot with two receipts and determining what the seller wanted for only the parts you are using, at the time of sale, or by FMV out of the lot so long as you have an itemized receipt for parts used.


Q: If I get discounted parts with a rebate, i.e. a promotion allows for a $50 Visa prepaid card for my $250 shocks, how is the rebate factored into the purchase?

A: The rebate is a discount from the net cost. In this example, the budget hit would be $200 for the shocks counting the rebate.


Q: Are upgraded wheel studs considered a safety item and excluded from the budget?

A:  Yes, they can be made of unobtanium and not count. Wheel studs are designed to keep the wheels on your car and therefore exempt.


Q: Does a parachute count towards the budget?

A: Yes, this is not listed as an exempt safety item. Parachute materials and hardware are included in the budget.


Q: Is there any way to relocate the battery inside the passenger compartment if my car does not have space outside of it?

A: The battery box must meet both requirements for SCCA and NHRA regulations if it ends up inside the passenger compartment in any way. Upon last search there is only one Moroso-made unit available which vents outside of the car. The battery compartment must be a “fully-sealed firewall.” Also note that battery relocation means you must have a kill switch that kills both the battery and alternator simultaneously.


Q: Can I run my convertible without any top in place?

A: Yes, though as per NHRA regulations if it runs faster than 13.49ET it will require an approved roll bar.


Q: Can I run my exhaust through the passenger side foot well for clearance?

A: Only if any intruding sections of exhaust are covered with a firewall material.


Q: If I offer unrelated labor in trade for my Challenge vehicle, does that count against my budget?

A: Yes, if you trade labor to lower the purchase price of your car it must be calculated by FMV. Minimum wage for the state you are in multiplied by labor hours is fair.


Q: Is a laptop or other data logging computer (i.e. action camera like a GoPro) allowed in my Challenge car and does it count towards the total budget?

A: If a computer is in the car during competition, it and its cables/adapters are exempt from the budget provided they are easily removable, leaving every vehicle feature fully functional in their absence.


Q: Can I use cable ties as a battery tie down?

A: No, you will need a removable, reusable battery tie down made of metal to run. (NHRA requires a metal strap or minimum diameter 3/8th inch threaded rod.)


Q: Does my Challenge car need a functional horn?

A: No


Q: What is the official age of eligibility for the Old Guy class?

A: 55 years young


Q: If I use an access port tuner with external software (i.e. COBB Stage 1 Tune) does that count against budget?

A: In this instance, yes. You are paying for the labor that tune cost and the purchase price must be included. However, if you used open source software and made your own tune, that is budget exempt because you did the labor.


Q: If we bring two sets of tires and use only one of them, can we claim only the set used in our total budget?

A: In this case, you can amend your budget but must keep staff in the loop about the changes.


Q: Can I run a car that does not have a windshield?

A: Yes, but it must have a wind deflector as described in the NHRA rules.


Q: If I plan to repaint or restyle my returning Challenge car, can the supplies used last time be removed from the budget as the new supplies are added on?

A: What is on the car counts, old paint and vinyl decals must be completely removed from the car in order to be removed from the budget. If you do that, you also cannot reuse the original materials should there be any leftovers. They go back to FMV.


Q: NHRA rules say that all cooling systems/radiators must be in their stock location for the body style used, does this apply to engine swapped cars?

A: In that case, you do not have to strictly adhere to the NHRA rules. No sense air-cooling an LS-swapped 911SC for example.


Q: Is money found inside the car after purchase a discount to its price or recoup of any sort?

A: Congratulations! That 62 cents found under the seat is recoup to your budget.


Q: While donut spares are totally illegal for the drag portion of the event, can we run donut spare wheels with legal drag tires on them?

A: Totally, go for it.


Q: Do core charges count in my budget if they are a deposit left with a retailer and not the cost of actual parts?

A: Absolutely they count towards the budget, it is total cost in the car including core charges. However, if you return the core and have a receipt for the refund it can be removed from the budget. Note that core charges are not part of your recoup limit.


Q: My car has a shorter wheelbase than the NHRA minimum, which is 85 inches. What should I do?

A: Cars with wheelbases shorter than 85” are welcome to run at the Challenge. However, if your car exhibits gross instability during a drag pass, you may be barred from making another pass.


Q: I live in Canada. How do I calculate the exchange rate?

A: Exchange rate is calculated on a per-item basis when you do the deal. It's "how many US dollars or their equivalent did you hand over for the part.”

Still have questions? Email Tom Suddard for an answer.