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PostPosted: Thu Nov 17, 2016 2:56 pm 
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Or just mount a standard cell a bit higher in the car to give more room for the diffuser...

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PostPosted: Sun Nov 20, 2016 10:59 am 
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FYI 2017 rules have been submitted to Nasa HQ. They should be posted in the next week or so.. Happy Turkey Day!

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PostPosted: Wed Dec 07, 2016 4:05 pm 
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Folks, Sorry for the delay, NasaHQ has the 2017 rules and will post soon, however many have been asking when and what changes in order to prep for the up coming season so here are the changes for 2017:

Spec iron

Open tune allowed:
1. ECU tuning is permitted

Dyno paperwork enforcement:
1. All SI participants must have a dynamometer certification report(s) prior to the start of the race or make arrangements to have a dyno test performed immediately after the race. Certification reports can be valid for an entire season provided that NO PERFORMANCE MODIFICATIONS are performed to the car. If more than one tune/setup is used each will require its own dynamometer certification report. Dyno test must be performed prior to first race entered for the season and after the last race entered from the previous season. Any SI competitor wishing to race without a Dyno Certification will be required to compete in American Iron Extreme (AIX).

The dynamometer certification report will consist of TWO PARTS: a completed SI DYNO SPEC SHEET and DYNO READOUT GRAPHS. These forms must be kept with the vehicle's logbook and be ready to present to any official. The SI Dyno Spec Sheet includes instructions for performing the official dynamometer inspection, which must be followed in order for the dyno report to be VALID. The Dyno Spec Sheet is available in the Appendix of these rules. Any SI competitor without a VALID DYNO CERTIFICATION is subject to DISQUALIFICATION or be required to compete in American Iron Extreme (AIX).

Dyno runs must start below peak torque and end after max hp:
1. Three consecutive runs shall be made under full power. The RPM range shall be consistent for all three runs. Starting RPM shall be clearly below peak torque and no higher than 2500. Ending RPM shall be clearly beyond max horsepower.

American iron

Restrictors:
1. The only devices permitted to restrict engine power are the following: Electronic tuning, restrictor plates or throttle stops. Any other restrictor must be approved per section 8.7 non conforming equipment. All restriction devices must be documented on the dynamometer specification sheet as to their software file name, size, shape and/or settings. Taping up air boxes or air filters is not permitted.

Dyno paperwork enforcement:
1. All American Iron participants must have a dynamometer certification report(s) prior to the start of the race or make arrangements to have a dyno test performed immediately after the race. Certification reports can be valid for an entire season provided that NO PERFORMANCE MODIFICATIONS are performed to the car. If more than one tune/setup is used each will require its own dynamometer certification report. Dyno test must be performed prior to first race entered for the season and after the last race entered from the previous season. Any AI competitor wishing to race without a Dyno Certification will be required to compete in American Iron Extreme (AIX).

The dynamometer certification report will consist of TWO PARTS: a completed AI DYNO SPEC SHEET and DYNO READOUT GRAPHS. These forms must be kept with the vehicle's logbook and be ready to present to any official. The AI Dyno Spec Sheet includes instructions for performing the official dynamometer inspection, which MUST be followed in order for the dyno report to be VALID. Any restriction device placed in the air intake system (or method to restrict power) must be clearly identified as such and marked to indicate its dimensions. The Dyno Spec Sheet is available on the AI website and in the Appendix of the rules. Any AI competitor without a VALID DYNO CERTIFICATION is subject to DISQUALIFICATION or be required to compete in American Iron Extreme (AIX).

Dyno runs must start below peak torque and end after max hp:
1. Three consecutive runs shall be made under full power. The RPM range shall be consistent for all three runs. Starting RPM shall be clearly below peak torque and no higher than 2500. Ending RPM shall be clearly beyond max horsepower.

American iron extreme

No Changes


Thanks...........

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PostPosted: Thu Dec 08, 2016 7:35 am 
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47car wrote:
The value of removing the spare tire well without installing a fuel cell would be all aero by allowing you to build a decent rear diffuser in cars with saddle tanks like the S197. You could still do it per the rules as is but would have to buy an expensive wedge shaped fuel cell and then perform quite a bit of fab. This rule would make rear diffusers cheaper to install for those cars.


I'd be extremely concerned about making it too steep to quick, especially since flat bottoms are prohibited, and it has to start just behind the rear axle.

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PostPosted: Thu Dec 08, 2016 1:55 pm 
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AJ Hartman wrote:
47car wrote:
The value of removing the spare tire well without installing a fuel cell would be all aero by allowing you to build a decent rear diffuser in cars with saddle tanks like the S197. You could still do it per the rules as is but would have to buy an expensive wedge shaped fuel cell and then perform quite a bit of fab. This rule would make rear diffusers cheaper to install for those cars.


I'd be extremely concerned about making it too steep to quick, especially since flat bottoms are prohibited, and it has to start just behind the rear axle.



Creativity will go a long ways, both of my S197 cars have a rear diffuser ' ish device to prevent air getting into the inside of the bummer. One has a fuel cell and trunk floor removed, the other is full stock trunk floor. I am by no means a good fabricator and it wasn't that hard to build, think I have less than 200 bucks of material in it.

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PostPosted: Thu Dec 08, 2016 6:56 pm 
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T&A Racing wrote:
AJ Hartman wrote:
47car wrote:
The value of removing the spare tire well without installing a fuel cell would be all aero by allowing you to build a decent rear diffuser in cars with saddle tanks like the S197. You could still do it per the rules as is but would have to buy an expensive wedge shaped fuel cell and then perform quite a bit of fab. This rule would make rear diffusers cheaper to install for those cars.


I'd be extremely concerned about making it too steep to quick, especially since flat bottoms are prohibited, and it has to start just behind the rear axle.



Creativity will go a long ways, both of my S197 cars have a rear diffuser ' ish device to prevent air getting into the inside of the bummer. One has a fuel cell and trunk floor removed, the other is full stock trunk floor. I am by no means a good fabricator and it wasn't that hard to build, think I have less than 200 bucks of material in it.


For the love of F1, post pics! I need a diffuser. :D

Sorry I missed the RCR discussion. I agree with you Mark. Glad we aren't reinventing the wheel. Also, where was all the contact? Can we get some video? Other than Pat trying to kill me last year and Dennis taking off my beloved "FR500S" logo'd RH mirror BEFORE the start of last race, we haven't had much issue in AI here.


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PostPosted: Fri Dec 09, 2016 12:24 pm 
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2017 rules are posted!

https://www.nasaproracing.com/rules

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