what the most static compression you'd want and still be able to put boost to a motor and be worth doing it? i'm still gett'n my motor together and still have time to change a few things. I got flat top pistons and .042 head copper head gaskets putting me at 11.6-12.0:1. I know with the heads i got and the deepish dished pistons (shelf piston) available from JE the lowest i can get is 9.8:1

 

9:1 is about the limit when you want any amount of usable boost
Your heads are wayyyyy too small for a boosted engine. Might as well put it together as a NA motor, maybe a bit of nitrous.

 

are you running a 48cc chamber? im confused how a flat top piston can get 11.6 my 357 turbo motor for a t88 has je pistons and has 8.4:1 comp

 

how much nitrous can you use if static compression ratio is 11:6.1?

 

Go to a .057 head gasket and have the chambers opened up a bit. as for a limit it would depend on the tolerance of the motor. Aluminum heads help a liottle more with detonation.


Get it down to 9.5 to 1 or so and run good fuel(or an alcohol kit) and you'll be fine......

plenty of people running boost with high 9's static.

My last TTA had a little over 9 to 1 with iron heads.(GN pistons with the smaller TTA heads).

 

well a typical pro mod motor runs compression as high as 16:1 and they spray arround 1000 hp shot. so that is a loded question.
on my 355 i spray 225 and have sprayed 275 on 12.4:1 pistons. no delay

 

measured them out just to double check myself and they came out 48.5-49 cc. me not thinkin... go figure...when mock'n up the motor the piston was down in the hole about .022. (changed blocks). i should of left it there. i had it milled to flat

 

what kind of heads are they . 18deg. thats a tiny chamber if they are 23 deg i would worry about valve shrouding problems. you still would need arround a -36cc dish to get to low 10s high 9s.

 

they're Air Flow Research heads. they were milled at factory to bring compression up on the stock motor to mid 10's. came in a kit from that was setup by lingenfelter performance in mid/late 90's purchased through tpis. at least thats what i understand. the kit came on the car when i bought it. they're cnc ported intake and exhast. cnc chambers. im a dealer for profiler heads so im debating on gett'n me a set of those and sell'n these AFR's

 

the only problem with them now would be if they were angel milled that much you would not be able to run as much camshaft.