LS7 Cam
Cam Timing at .050 tappet lift:
...........open......................close........ ...........duration
exhaust 52 BBDC...............2 btdc.....................230
intake 18 atdc..................49 abdc....................211
...........open......................close........ ...........duration
exhaust 52 BBDC...............2 btdc.....................230
intake 18 atdc..................49 abdc....................211
John, the closest I can come to your valve events is 211/230, 120LSA 123ICL (-3). Sound about right? It's got about -20 degrees of overlap at .050" which compares to the '02 LS6 cam with -24 degrees of overlap and the LPE GT2-3 cam with -20 degrees of overlap. For further comparison, my Thunder Cheater Cam has nearly identical exhaust valve events, but the intake lobe has the valve closing at 43 degrees ABDC which works better for a 346. 49 degrees of intake closing point would make this cam really lazy on a 346, but it's probably the reason it will rpm with LS7 heads and 427 cubic inches. Good job GM!
__________________
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.
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John, the closest I can come to your valve events is 211/230, 120LSA 123ICL (-3). Sound about right?
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Thread Starter
On The Tree
Joined: May 2004
Posts: 104
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From: Denver CO.
Originally Posted by John B
Unfortunately I couldn't tell you! The 0.050" lift spec's I quoted were the ones that I received directly from GM.
