what lsa would you recommend for a 408??
03-22-2005, 06:49 PM
#1
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what lsa would you recommend for a 408?? i was having this discussion with my friend about what lsa to use on his 408. he plans on spraying 250 shot through a TNT F4 DP. i was thinking that a 114 was most suitable, but he insisted on getting a 112 lsa. can he use a 112 lsa and not leave a lot of hp on the table? what would be the advantages of going with a 114 over a 112? i need as much input, he plans on ordering his cam tomorrow and said he would let you guys decide the lsa. thanks in advance.
03-22-2005, 07:07 PM
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You can't pick the right LSA without knowing the duration numbers first.
Less duration will need less LSA to be streetable... larger duration will need larger LSA for the same effect.
Less duration will need less LSA to be streetable... larger duration will need larger LSA for the same effect.
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03-23-2005, 01:53 PM
#9
Anything under a 200 shot, you should choose the cam based on N/A performance goals. If spraying over a 200 shot, then you'll want to open the exhaust valve a little earlier (because nitrous burns so much quicker than gasoline and air alone). An earlier exhaust opening will reduce pumping losses and increase power. You can open the exhaust earlier by advancing the cam or by widening the lobe separation angle.
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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
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2023 Corvette 3LT Z51 soon to be modified.
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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
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.
03-23-2005, 06:51 PM
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Originally Posted by Patrick G
Anything under a 200 shot, you should choose the cam based on N/A performance goals. If spraying over a 200 shot, then you'll want to open the exhaust valve a little earlier (because nitrous burns so much quicker than gasoline and air alone). An earlier exhaust opening will reduce pumping losses and increase power. You can open the exhaust earlier by advancing the cam or by widening the lobe separation angle.