AF HP diff 12.6-13.0?
#2
Originally Posted by 98camaroLS1M6
About how much is there to be gained by a cam only car making 390rwhp going from 12.6A/F to 13.0A/F? About 10rwhp?
#4
LS1 Tech Administrator
iTrader: (14)
Depends on where you're measuring the A/F from. If you're sticking a probe up the tailpipe, the results may come out leaner than they really are...sometimes as much as a full point lean. That means a 13.0:1 ratio reading at the tailpipe may actually be 12.0:1 if measured from a bung just aft of the header. In this case, going from 12.6:1 to 13.0:1 measured at the tailpipe would actually be going from 11.6:1 to 12.0:1. The hp difference would probably be bigger than going from an actual 12.6 to and actual 13.0.
Also, keep in mind, most LS1s will like a little fatter mixture up to peak torque (say 12.5:1), but they seem to be a little less sensitive to A/F ratio as you approach peak hp. The power difference at 6300 between 12.6 and 13.0 may be very small.
Also, keep in mind, most LS1s will like a little fatter mixture up to peak torque (say 12.5:1), but they seem to be a little less sensitive to A/F ratio as you approach peak hp. The power difference at 6300 between 12.6 and 13.0 may be very small.
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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.
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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.