sspower23

I have a stock Ls1 346ci engine and Im planning to get texas speed PRC LS6 stg 2.5 CNC ported cylinder Heads. After adding these heads, what will the COMPRESSION RATIO in the motor be?? This will help Me pick a specific camshaft for the heads, any help please, thank you

borderguy881

iTrader: (3)

im intrested in this myself...how much affect does valve relief have on it?

02*C5

iTrader: (1)

Depends on how much the deck is milled and I think that's a costumer choice and what gaskets you end up using?

sspower23

PRC LS6 stg 2.5 CNC ported heads are 64cc

Spd-Kilz

iTrader: (35)

Fairly certain it will be ~10.5:1

slt200mph

iTrader: (42)

Call texas speed and ask them they build the heads.

Sales2@Texas-speed

iTrader: (5)

With the stock short-block and GM MLS head gaskets you can get them at 64cc chambers and that will net you about 10.7:1. Of course thinner gaskets and milling can bump your compression up from there!

What camshaft were you considering?

sspower23

With those PRC LS6 stg 2.5 CNC heads? The Torquest camshaft from the following is what I will use:

215/231 .631/644-118lsa
232/234 .646/.612-112
235/243 .621/.624-113
239/242 .649/.609-112

Which one is the Torquest camshaft for those heads??
Thanks

hammertime

iTrader: (1)

Why limit it to those choices - especially the first one? Your first selection is similar in profile to the CheaTR, a compromise cam for stock like sound with a stock exhaust. All the rest tend toward the mid-upper range.

You've really skipped over the lower 220's cams that will really make some torque at useable rpms.