Sean F

The easy way to find out it to run with NASA and everyone gets dyno'd

reno808

i think that would be a hassle and can easly be cheated

Jim Child

I've run both PCA and NASA GTS. In my experience the NASA GTS dyno testing is not a hassle, and nobody appears to be cheating it. Its well worth the extra 15-20 minutes post race that the winners spend at the dyno. Plus you get a free dyno sheet. This is in contrast to PCA where there is plenty of cheating going on that the scruitineers are letting slip by. I know there's one PCA F class car that I'd love to see make a public dyno run.

carreracup21

I think NASA is really on to something with a dyno at the event. That really protects the legitimacy of an race where engines are supposed to run in a certain power envelope. It also protects the winners from being wrongfully accused of cheating. Nothing hurts worse than driving well and winning a hard fought race, only to have your competitors make whispers or even open cheating accusations against you. That is really a cold slap in the face and spoils the fun of racing. When you win in the PCA stock classes you pretty much have to get used to it.

cooleyjb

I think it would be easily cheated. Swtichable maps on an ECU could affect HP readings. Is there a way they can make sure that doesn't happen?

MJR911

Well said CC21.

carreracup21

I imagine you could find scrut with motec experience to sort that out. Most cars won't have maps that are easily switchable with the push of a button. The ones that do, well you get them checked more carefully, or make it illegal to run more than one map.

993944S2

I was discussing this with someone just this weekend. His suggestion was to require everyone in stock class to run pump gas only. Simply take fuel samples when the top three come off track. I understand it is very easy and quick to check octane. If compression is stock, engines should be fine on pump gas, correct? Comments?

38D

Probably fine for everyone except tubros. On hot days, 93 is pretty marginal for an aircooled turbo. My engine was all stock, but I still ran 100.

Jim Child

The rule regarding adjustable engine management systems is that they must be declared in advance on the dyno certification form. If you are caught running one undeclared then you're DQ'd for the weekend. Obviously if someone is showing on track performance that is at odds with the dyno results, then this is the first thing the scruits will look for.

cooleyjb

Thanks for the clarification.

Nader Fotouhi

Don,

I have used 100 in my car for race with the rational that if the knock sensor does not detect knocks, then fuel continues to get dumpoed in. I consider this the vitamin theory. I have no evidence that it help, but it does not hurt (I hope) to try.

Actually, I am have been thinking about soem Dyno runs back to back with 93 and 100 gas and stock header and then do the same after installing the new header.

Nader

993944S2

New tread opened titled pump vs. Steet gas.

mikew968

I will say in NASA I have never had a slower class "pull" me down the straight. Now I know corner off speed is important but the difference in performance would allow me to catch a slower class car by the end of the straight (in NASA). I have had G cars in PCA pull me down the straight. Maybe the classes or the individual car was very close to F???

Mike