e30lsx

Building an l33 with 243 heads and forged pistons. Using stock gen4 floating rods with arp bolts. Going to ru as much booat as it likes with the lsa blower... whats thexbest compression ratio to aim for on 91pump gas no meth. I can mill heads to get 9.0 maybe more to get 9.5 what does everyone think is best compression ratio?
Pistons will be wiseco k0042x1 or je 315554 both about same price. Not sure whats a better piston? Sure both are good...

93camaro_zzz

iTrader: (13)

LSA supercharger will not fit on 243 heads, unless you buy those weird adapters or change heads.

e30lsx

Yes i have the adapters already. Slapping it on my cammed lm7 in the car for now tell new engine is built. Then swapping on that with a pulley

93camaro_zzz

iTrader: (13)

What size/specs engine are you building? I think the LSA blower is pretty small. I would want at least a 2300 blower for a built motor.

e30lsx

Just an aluminium 5.3 .010 over.... going in a bmw thats under 3000lbs

93camaro_zzz

iTrader: (13)

Oh ok, cool. That will work well. I wanted to throw an LSA on my TBSS LS2, but only reason I am not is because of the heads.

lilaaron233333

iTrader: (10)

I got a edelbrock e force I put in my tbss. Worked good 525rwhp thru a 4L80 would of prob made little more thru a 70e. Now it's time for bigger blower lol.

e30lsx

Came up with another option... ljms 3.800bore -2.2cc wiseco flat tops. If i use them i need the 6.125 rods and wouldn't have to mill heads any. Should be around 9:6 cr. Was trying to save some $ because my l33 has gen4 rods they should be fine for what im doing. But after arps and resize might not be saving much... also would save on machine work on milling heads, just deck them and slap them on....whats advantages to 6.125 rods over stock legnth? Some people ask why forged pistons for only 15psi or so? I got l33 for nothing but it has no heads and needs a rebuild (was low on oil psi) so planed on little bore and new bearings.. didn't think worth using stock pistons at this point...