408 Stroker cam help
#1
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Can someone point me in the right direction as to which cam i should get or can someone spec me a custom cam? I have a 408 stroked lq4 with CNC'd L92 heads FAST 102/102 has about 9.5:1 CR plan on running pump gas, going to have a t56 trans with a moser M9 4:10.
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See if you can get the valve free-drop dimension before you get a cam spec'd. I have seen a lot of ported L92 heads that have really shallow valve drop dimensions. The shallower the dimension, the less piston to valve clearance you'll have.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
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2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
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2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
![](https://ls1tech.com/forums/signaturepics/sigpic210_1.gif)
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
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Why such a low compression? you planning on boost later? If you're just worried about pump gas, you could get away with pump gas at least another point higher...
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yes i was planning on adding an f1 later on, i figure i should be able to run about 15 or 16 lbs safely on pump gas with 9.5:1
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how would i measure that, its a brand new set of cnc'd l92 heads from gm i cant find that dimension anywhere and im out of state for the next 2 months. what would i do? take the springs off and measure the stem then set it on a table drop the valve and measure the stem again? the pistons i have are for an l92 engine with a 20cc dish and valve reliefs
Last edited by M_juntti2001; 04-03-2010 at 06:38 PM.