how much power can be made with out of the box L92's on a 408?
08-04-2007, 12:20 PM
#2
This guy did an in depth before and after on stock vs CNC's L92's. Lots of good info here. 
https://ls1tech.com/forums/generation-iv-internal-engine/662314-l92-dynojet-numbers-plus-plan-b-c-d-e-f.html
https://ls1tech.com/forums/generation-iv-internal-engine/662314-l92-dynojet-numbers-plus-plan-b-c-d-e-f.html
08-06-2007, 12:10 AM
#3
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Originally Posted by WKMCD
This guy did an in depth before and after on stock vs CNC's L92's. Lots of good info here.
https://ls1tech.com/forums/showthread.php?t=662314
https://ls1tech.com/forums/showthread.php?t=662314
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08-06-2007, 08:16 PM
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LME is seeing 515 to 530 rwhp running stock L92's w/ dual spring upgrade. This is with both the 408" iron and 402" LS2. LME is using a Wiseco custom piston and ring combo w/ L92 valve pockets that are 5cc's. The piston also has a 4cc dome that matches the L92 chamber. This allows 11.5:1 with no milling of the heads. 11.75 to 12.0:1 is obtainable with minimal milling of the head.
08-06-2007, 08:25 PM
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Dont know about stock L-92's, but we will have some numbers on ported L92's and a 408 very soon.
Cam is not giant for this; 24x's, .61x.
Planning on spraying 300
Cam is not giant for this; 24x's, .61x.
Planning on spraying 300
08-06-2007, 09:28 PM
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mine is 11 to 1, 1-3/4 headers no cats dual 3 inch exhaust x pipe ,ported tb, livernoise stage 3 heads, electric water pump, cam is 248-262 637-647 on a 112. if they are getting 515-530 with stock heads i will be calling them wednesday thanks b/c i got something wrong. i did not pay 2100.00 for ported heads to get less power thens stock ones
08-08-2007, 06:57 AM
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Originally Posted by 1bigcam
mine is 11 to 1, 1-3/4 headers no cats dual 3 inch exhaust x pipe ,ported tb, livernoise stage 3 heads, electric water pump, cam is 248-262 637-647 on a 112. if they are getting 515-530 with stock heads i will be calling them wednesday thanks b/c i got something wrong. i did not pay 2100.00 for ported heads to get less power thens stock ones
If you where running better headers (i.e. 1 7/8) you likely would not need all that cam to make the same power. also most of the port work on those 367 or so cfm heads was done on the exhaust side. That is where the LS3/L92 heads really need work! And.... yeah, they will make more power thens stock ones.
