Thread: Took apart the whole engine.. (Advice Wanted)

a .30 over bore aint going to make you that much more power, and that set up is going to be a lot more work and money to get running, vs picking up a used engine and just swapping your parts to it, used engine is by far cheaper and faster to get going, no machine shop work, just slap all your parts together and go.

used engine costs 400 to 600, over 600 for one with lower miles if you shop around for it. like i said you need new heads too, the used engine will come complete.

what ever you do decide to do, put a bigger pulley on the sc, and work your way down to where it runs without knock. or the same thing will happen.

Originally Posted by Hixc

im assuming it in this way..

.030 overbore=more compression? require larger pulley- does the overbore make up for the lost HP pullying up?

stock bore=8:5:1 use the 3.0 or 3.1 that i should of used. the pcm has been HP powertuned to run my mods 2.8 w/Racing Torco and 3.0 93 octane


so the question is, if i want to go faster, do i get the .030 or stock bore shortblock? in the future id like to get either the Stage 2 or 3 intercooler.

I may be wrong, but having a larger piston wouldn't up the compression unless the piston's compression was different. Things that would increase compression are, decking the block, heads, headgasket thickness, crank stroke, and piston compression rating. Using a larger piston should just increase the amount of air and fuel pulled through the heads. Might actually need a smaller pulley to maintain current boost. A larger engine like a V8 needs a larger supercharger to feed it basically.

Originally Posted by Hixc

I checked out all the valves and head, no cracks or any signs of anything hitting. everything looks good on them. i mentioned the engine because someone has a shortblock already .030 bor with new pistons,rods, ect for 400. i was also offered naturally aspirated series 2 motor complete for 250.

you could get a whole engine for 400, thats why the short block rebuild will cost you another 4 or 500 to finish or more. you need a full gasket kit, aint cheap, machine shop work, not cheap, rings, not cheap, bearings. the used engine you pop your cam it it a new lim gasket set and get er done. you follow my train of thought?

Originally Posted by RegalGS98s

I may be wrong, but having a larger piston wouldn't up the compression unless the piston's compression was different. Things that would increase compression are, decking the block, heads, headgasket thickness, crank stroke, and piston compression rating. Using a larger piston should just increase the amount of air and fuel pulled through the heads. Might actually need a smaller pulley to maintain current boost. A larger engine like a V8 needs a larger supercharger to feed it basically.

the bore only affects the cubic inches, you may gain like 3 or 4 cui

Originally Posted by matt5112

on an 8

my brothers 454 was 30 over and it was then a 462 so i just dropped it down a bit, i hate math....

These cars never blow head gaskets. But since you have to take off the lim anyway to put the cam in, you are only 16 bolts from taking off the heads.

A. You only need felpro
B. Pretty sure they are cheaper other places. And you only need studs if you are ever going to take the heads off again. If not, just get the TTY ones.