I'd love to run pump gas but my engine is an iron headed 408 with 11.47:1 compression. Even with my cam it still puts me on a VERY fine line. Personally I'd rather not take a chance
Get the timing curve correct, get the coolant temp down to 180 at the very hottest, make sure you have the correct heat range plug and then don’t drive the car like it’s a stock engine. In other words, don’t drive down the road at 30 MPH in high gear and mash the throttle. That’s too much load and it will rattle.
Some day, probably by late summer Im going to do some videos on pump gas engines using higher than 11:1 compression ratios. On how to do it and why you should do it.
FWIW, unless you severely heat load the engine (like a long climb without downshifting) you can and should run the same compression ratio with iron heads as you do aluminum heads.
