Posted by Jay Novak on the SCCA F500 & FModified Facebook Page
January 1 at 10:48 AM
Ok guys let’s get together to save the F500 class. As you know under the new rule the 593 engines simply cannot live long enough to be competitive for a long enough time period to be a functional and low-cost engine for F500. Hp is not the problem imo. The problem imo is that the engine, with the inlet restrictors, must turn 8800+ rpm to make the needed power and the resulting imbalance forces causes the crankshafts to fail, and or the crankcase to crack.
How to fix this and make it so that the 593 can be both competitive and live. I propose the following basic concept.
1. Implement an Rpm limiter that limits the maximum engine Rpm to 8300 rpm. This will significantly reduce the imbalance forces and the Rocking couple of the engine. Thus, reducing or eliminating crankshaft and crank case failures Please note that the production 593 engines all make their power at about 8200 rpm. Thus the 593 should then live just like the production engines do. The stock ecu can then be recoded to a max rpm of 8300 or an aftermarket rev limiter can be installed for about $150
2. Remove the current mandatory inlet restrictors that are in the intake boot, this will allow the engine to produce 112 to 116 hp
3. The biggest downside to this concept is that it will might require a new pipe to be developed
4. I will also propose that the 494 and the 493 engines be allowed twin pipes but no internal mods allowed
I think that this proposal just might save F500 as an SCCA racing class, if we do nothing the class will be gone within 2 years as the current entry numbers are very poor.
Please post your comments here or send me an email to jaynovak@comcast.net. I welcome any ideas or suggestions.
I should have some dyno data in a week or 2.
Perhaps we can form an Ad Hoc committee too
Please help save this great class! Any and all comments
FYIQuote:
Originally Posted by Jnovak
