Quote:
Originally Posted by scott70
Speed pro makes a 4 valve relief piston that probably has a more desirable compression height. If you know your current piston manufacturer and part number you might be able to look it up and see what the CH is on the pistons. And then compare that to the speed pro advertised CH . Auto tech can make pistons to a desired CH but that would be more money but also a better piston overall. Basically just moving the wrist pin location up or down. The first engine I ever had done back in the 80's had 8 valve relief badger pistons.
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I think the 8-relief pistons had a 1.700 CH(I call it pin height). The Speed Pro L2262F pistons have a 1.714 pin height. So, that's .014 closer to the deck. Plus, they don't have a bevel around the top. like the sealed power pistons do.
https://www.summitracing.com/parts/s...w/make/pontiac
https://www.summitracing.com/parts/u...w/make/pontiac
https://www.summitracing.com/parts/slp-l2262f
I think the Icon pistons have a 1.720 pin height.
https://www.summitracing.com/parts/u...w/make/pontiac
https://www.summitracing.com/parts/u...w/make/pontiac
But, as stated, if budget will allow, the Auto Tec pistons are best. They're lighter & can have any pin height you need. Some of the price increase can be offset because of less deck machining needed, with the correct pin height.
https://shanonsengineering.com/produ...at-top-pistons