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Originally Posted by 5twenty They key there is the RPM. That's what kills the connecting rods in a S197. You keep it below that, or even lower, and I think a lot of people will be surprised how long they last. |
Exactly. RPM will kill the rods and/or pull the pins out of the piston skirts. Same thing goes for the cast vs forged crankshaft issue. I used to tell people who insisted on a Cobra crank that unless they were going over 7000 rpm regularly they just did not need the forged crank. Cast cranks are fine under that level and up to around 800 hp or so. I have never seen a broken cast crank that was kept under 7000 rpm.
We had a chat yesterday about this deal and we have decided to keep the car right at this level of performance for the rest of the season. Figure that 10.90's to 11.20's is just fine and won't stress the shortblock or transmission too badly. The sponsor believes, and I agree with him, that a high ten second daily driven car with a STOCK engine, 8 lbs of boost, and a few race wins (or hopefully a championship or two) is considerably more impressive than a mid-low ten second car with a built engine and 15 lbs of boost. They just want to show what the kit is capable of doing on a stock setup this year.
Now...next season?
