RE: SEMPRA Members
Wasn’t the original intent of the 16,500 RPM rule to limit the field of potential engines and prevent constant changes of engines to the latest thing that turns a few hundred more RPM?
That problem went away with the adoption of the engine list that only includes the TT Pro .40. Most of the 424 racing groups are using the TT Pro .40 and are generally happy with it. I think we should keep working toward rule consistency across the country.
It is well known that many completely stock TT Pro .40s can turn over 16,500 on the ground with a stock APC 9 x 6. I don’t see this as a problem as long as competitors are following the rules. It doesn’t make sense to me to have these 100% rules compliant engines declared illegal.
What is a reasonable way for CDs to determine if the engine is stock? Perhaps a higher RPM limit as an indicator as Duane suggested.
The 428 event requires a stock engine as well with more variables. How do CDs determine if these are stock?