Compression numbers
12-11-2009, 08:34 AM
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Compression numbers I am installing a set of stock L92 heads with a .650 spring and push-rod/upgrade stock valves and offset rockers.... also i am installing a stock LS3 intake with stock fuel rails and injectors on my stock 6.0L LS2....with a 232/234/595/598 112 lsa cam "whoops my mistake" that is a proprietary cam spec, Lets just say it's the "Michael Jackson cam" that's already installed in the block. i am going to use GM MLS head gasket of the lowest thickness to try an get a little more compression...
I was told by GM that the L92 heads have 70cc combustion chambers.....what would my compression ratio go down to if use this set up?
!VENDORS YOUR WELCOME TO CHIME IN, as i need offset rockers, LS3 map sensor, adapter from Delphi to Bosch map sensor, ARP bolts, and assorted gaskets... I know you are all at the PRI show, but when you come back maybe you could give me a heads up....on the stuff i need...
As always any help would be greatly Appreciated,
Thanks,
The Head
I was told by GM that the L92 heads have 70cc combustion chambers.....what would my compression ratio go down to if use this set up?
!VENDORS YOUR WELCOME TO CHIME IN, as i need offset rockers, LS3 map sensor, adapter from Delphi to Bosch map sensor, ARP bolts, and assorted gaskets... I know you are all at the PRI show, but when you come back maybe you could give me a heads up....on the stuff i need...
As always any help would be greatly Appreciated,
Thanks,
The Head
Last edited by crakhead; 12-11-2009 at 09:38 AM.
12-11-2009, 01:08 PM
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How much HP are we talking about?
From say 10.9.1cr going down to 10.4.1cr......i am crunching numbers$$$ as to the cost to have the heads milled for more compression, VS; the amount of power i am going to achieve.......because if it's just a few HP, I'll just keep the heads the way they are.
Right now my car with the set up i have in it is making 448whp and 404wtq.
I don't drag race it, or D Drive it, i just like to know i have the power to out muscle high end Germans/Japanese/or the occasional rustang
From say 10.9.1cr going down to 10.4.1cr......i am crunching numbers$$$ as to the cost to have the heads milled for more compression, VS; the amount of power i am going to achieve.......because if it's just a few HP, I'll just keep the heads the way they are.
Right now my car with the set up i have in it is making 448whp and 404wtq.
I don't drag race it, or D Drive it, i just like to know i have the power to out muscle high end Germans/Japanese/or the occasional rustang
12-11-2009, 04:28 PM
#4
The Gm head gaskets come in only 1 thickness. Stock. as far as the other stuff, we have everything that can set you up. When you go to L92 heads, with a cam, i would def not worry about a compression loss of .5. You see that every day on LS2 cars going from the 65 is chamber to the 68-70 of the L92. Some mill, some keep them the same. The biggest increase to be seen is with a CNC head. We have the rockers, stands, the map adapter (katech), more arp bolts than you can shake a stick at, and all the gaskets your wallet can afford.
12-11-2009, 05:02 PM
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The Gm head gaskets come in only 1 thickness. Stock. as far as the other stuff, we have everything that can set you up. When you go to L92 heads, with a cam, i would def not worry about a compression loss of .5. You see that every day on LS2 cars going from the 65 is chamber to the 68-70 of the L92. Some mill, some keep them the same. The biggest increase to be seen is with a CNC head. We have the rockers, stands, the map adapter (katech), more arp bolts than you can shake a stick at, and all the gaskets your wallet can afford.
I will be getting back with you on the rest of the parts i need, OK"; can i order them through you or do i have to go through Scoggin's web site...
I hardly ever use CNC to port, i use BnT...
12-11-2009, 05:16 PM
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pm me, call me, scoggins site (www.sdparts.com)or email is jginter@sdparts.com
Thanks for your assistance John,
JM
