captainstalin`

iTrader: (5)

I was wondering if anyone could help me figure out if 59cc heads would put my compression too high to run well on pump gas. The heads are for a 383 ls6 bored .010 pistons are mahle -6cc. My cam is going to be 590 / 590 224 / 232 115lsa
heeeeeelp

5.3LJimmy

iTrader: (10)

To properly calculate your DCR I'll need the cam ICL and your piston to deck clearance. I did run some calculations making a couple assumptions and your static compression will be about 11.4:1, which is very doable on pump gas.

gobigorgohome

iTrader: (1)

here is my specs been running on race gas but its getting expensive, i think 91 octane should do the trick whatcha think..sorry for the hijack


1999 LS-1 Polished Crank, 11.25:1 compression, small chamber heads, 550 lift Cam, Howell harness and computer,

captainstalin`

iTrader: (5)

im not sure where to find the ICL i havent bought it yet and Crane doesnt appear to advertise it that i have seen. i guess id have to actually measure the clearance

BIG_MIKE2005

iTrader: (116)

At 11.2 you should be able to run on pump gas no problem at all. Unless your tuned for the race gas, then you'll need to adjust for the pump gas.

405HP_Z06

iTrader: (11)

What is the cam part number? What head gasket? What is the piston-to-deck height? What is the rod length?

405HP_Z06

iTrader: (11)

You should have no issue running 11.25 on 93 octane. I'm running 11.31 with no issues.

captainstalin`

iTrader: (5)

Crane part: 1449121 rod length would be 7.25 if i remember correctly. i plan on using crane rocker set that comes with pushrods. (144750-16)
http://www.lingenfelter.com/store/ls1105910i06.html best description of my shortblock setup that i could find, i think.

405HP_Z06

iTrader: (11)

Here it is with a 9.240" deck height (pistons .010" in the hole) and a GM 6.0L MLS head gasket. Deck height will significantly affect SCR, so if it's different let me know.

Calculation:



No problem running that on pump gas.

captainstalin`

iTrader: (5)

pistons: actually the reliefs arent -6 cc the dome is -6 cc. heads: turns out the heads werent milled so theyre 62cc chambers. deck height is stock. thanks for the help

405HP_Z06

iTrader: (11)

The dome volume is -6cc's which means it's a relief and not a dome. This aspect of the calculation is correct.

Image updated in post above. FYI, you would be better off with a .040 head gasket because of the deck height. With .040 gaskets you get 10.97