408 Stroker cam help
Thread Starter
Teching In
Joined: Mar 2010
Posts: 13
Likes: 0
From: Madison Heights, MI
408 Stroker cam help 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.
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.
__________________
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.
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.
TECH Fanatic
Joined: Apr 2008
Posts: 1,775
Likes: 0
From: Shillington PA
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...
Thread Starter
Teching In
Joined: Mar 2010
Posts: 13
Likes: 0
From: Madison Heights, MI
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
Thread Starter
Teching In
Joined: Mar 2010
Posts: 13
Likes: 0
From: Madison Heights, MI
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; Apr 3, 2010 at 06:38 PM.
