Thread: trick flow top end kit (not good?)

Tweet

Your lookin at 65 hp per hole ,that hole is probably down 20 to 30 hp from the colapsed lifter at the most ,................I have a hard time believing that the stock pistons were a correct match for those heads and camshaft.
1 point low on compression could hurt you just as much if not more than the colapsed lifter,that means your actually 2 points low ,because you have aluminum heads.
I am thinkin that cam calls for about 10.5 to 1 and I am thinkin you got 9 to 1 at the most and then aluminum heads on top of that.
Think of what the performance would be on a engine with 8.5 to 1 and a cam in there that calls for 10.5 to 1.................I may be off base,but I recall most of the kits I looked at recommended changing the pistons to match the heads and cam,very few were for factory stock motors.

as i said before im no mechanic, the pistons are flat top with 4 valve reliefs in them,is that considered stock? also the guy that i bought the motor from said he built it for towing, the block has been decked a little bit,i dont know how much. he also told me it was bored .030 over . i didnt know matching the pistons was so critical. im starting to get the feeling i should have bought a GM performance engine instead of going this route. does any of that stuff make a difference?