Stage III livernois race heads for a 370?
11-19-2006, 10:37 PM
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Stage III livernois race heads for a 370? Livernois's stage III heads flow over 320 cfm on std 3.900 bore so would they flow more on a 4.030 bore or less. I was going to do the 2.08 valve (there stage III race head) on the new setup but was wondering if i would loose compression or gain considering these are ls2 heads?
11-19-2006, 10:51 PM
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Well, going to a larger bore would shroud the valves less and that is a component of a better flowing head..........but adding in the larger (2.08) valve size changes things too. The compression question needs more definition, are the pistons the same type, i.e. same size valve reliefs or dish, on the 4.030 bore motor? Need more info to answer you.
11-19-2006, 11:00 PM
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The pistons would be forged diamond -2cc or -15cc vavle relief but im looking for around 12:1 compression ratio. Also if that piston wont get me to that comression ratio what piston will and will it be able to handle alot of nitrous.
Last edited by forgedbluess; 11-20-2006 at 02:28 PM.
11-20-2006, 03:17 PM
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Originally Posted by forgedbluess
Livernois's stage III heads flow over 320 cfm on std 3.900 bore so would they flow more on a 4.030 bore or less. I was going to do the 2.08 valve (there stage III race head) on the new setup but was wondering if i would loose compression or gain considering these are ls2 heads?
You will gain compression, you are going from 71cc to 66cc with our Stage III Race Heads milled.
-2cc Diamond pistons would get you very close to 12:1. They should be able to hold nitrous decently. I would reccomend Mahle, however they dont make a piston that will get you to 12:1, probably closer to 11:1. This is assuming you have a LS2 bored .030 with a 4" Stroke.
Give us a call at 313-561-5500 and we can help you with any questions,suggestions and ordering of our heads.
Thank you,
Chad @ Livernois Motorsports
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11-20-2006, 05:22 PM
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Originally Posted by forgedbluess
Livernois's stage III heads flow over 320 cfm on std 3.900 bore so would they flow more on a 4.030 bore or less. I was going to do the 2.08 valve (there stage III race head) on the new setup but was wondering if i would loose compression or gain considering these are ls2 heads?
I granny shifted to an 11.47 @124mph weighing 3700lbs
11-20-2006, 10:34 PM
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Are you running a m6 or auto? Im going to buy the new stage III heads there coming out with and am hoping to make somewere around 475rwhp through a th400, 4200 stall. I havent made up my mind on the cam yet but im want the duration to be in the upper 240s and lower 250s and mid .600 lift.
11-21-2006, 05:17 PM
#10
Originally Posted by forgedbluess
Are you running a m6 or auto? Im going to buy the new stage III heads there coming out with and am hoping to make somewere around 475rwhp through a th400, 4200 stall. I havent made up my mind on the cam yet but im want the duration to be in the upper 240s and lower 250s and mid .600 lift.
