Anyone had experience with a cam like this? v.custom grind
01-25-2008, 08:20 PM
#1
Anyone had experience with a cam like this? v.custom grind So the place I got my car dynoed at has their own custom grind that will pass smog (important since im in ca). But it's a 232/236 .590/.595 115lsa
Anyone had experience with such high duration and lift with 115 lsa? I'm just curious how it will run. I'm a little concerned at what it will pull to as I dont want to rev too high
Anyone had experience with such high duration and lift with 115 lsa? I'm just curious how it will run. I'm a little concerned at what it will pull to as I dont want to rev too high
01-27-2008, 06:12 AM
#3
Actually the rule of thumb has to do with overlap. A 224/224 on a 110 will not pass, but a 224/224 on a 114 will. A 218/218 on a 110 will pass. A 228/228 on a 112 will not pass, but a 228/228 on a 116 will. Zero degrees of overlap is cutting it too close, aim for -2 to -4 degrees overlap at .050.
A 232/236 on a 115 is still going to give 4 degrees of valve overlap at .050 thousanths lift, I don't see how it can reliably pass. I don't have my spreadsheet open, but I also can't see myself liking the valve events.
A 232/236 on a 115 is still going to give 4 degrees of valve overlap at .050 thousanths lift, I don't see how it can reliably pass. I don't have my spreadsheet open, but I also can't see myself liking the valve events.
01-27-2008, 08:22 AM
#4
To be assured of passing the sniffer, I've always used -7 degrees of overlap as the cutoff for passing the sniffer. With a razor sharp tune, you can push it to -4 or even -2 degrees, but that's really pushing it.
With 4 degrees of overlap, a 232/236 115LSA cam has no hope of passing the sniffer for the majority of people. Plus the very late intake valve closing point is going to make the cam very gutless at lower rpm. Not a good choice. The best cam depends upon your mods and goals.
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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.
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
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
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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.
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
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
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01-28-2008, 07:30 AM
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So the place I got my car dynoed at has their own custom grind that will pass smog (important since im in ca). But it's a 232/236 .590/.595 115lsa
Anyone had experience with such high duration and lift with 115 lsa? I'm just curious how it will run. I'm a little concerned at what it will pull to as I dont want to rev too high
Anyone had experience with such high duration and lift with 115 lsa? I'm just curious how it will run. I'm a little concerned at what it will pull to as I dont want to rev too high
(OBD2) like ours, or can they sometimes just use the diagnostic scan like some other states do. I do not know if all of Cali is the same, or if it is run on a county by county basis.
