Low dyno #s with headers
04-16-2005, 01:44 PM
#1
Low dyno #s with headers I just dyno'd my car today, it's an 02 z28 A4 3.23s
slp flopac and loudmouth and just got coated pacesetters ORY installed,
the car dyno'd at 318-320rwhp and 322-330rwtq before the headers, on different dyno's
my new numbers are 329rwhp and 340rwtq,
so I only gained 6-10rwhp and 6-10 rwtq from headers?
the A/F ratio was 13.08
what do you think?
pat
slp flopac and loudmouth and just got coated pacesetters ORY installed,
the car dyno'd at 318-320rwhp and 322-330rwtq before the headers, on different dyno's
my new numbers are 329rwhp and 340rwtq,
so I only gained 6-10rwhp and 6-10 rwtq from headers?
the A/F ratio was 13.08
what do you think?
pat
04-16-2005, 02:24 PM
#3
11 Second Club
You never know with dynos. After all, they are only a tuning tool. Don't get too hung up on what the dyno puts out so long as everything else looks okay and it's not way way off. Ever run at the track? Best power/performance test there is.
04-16-2005, 02:57 PM
#4
Not too surprised by the numbers. The stock cam has too little overlap for headers to show their stuff. Most of the gains (when running stock cam) come from reducing pumping losses and backpressure. Add a cam with more overlap and you should see some really nice gains.
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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.
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.
04-17-2005, 10:08 AM
#7
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It meens did they lock the convertor for you on the runs or just let the torque convertor alone. If they didn't lock it your numbers will be lower 8-15 rwhp is normal for unlocked dyno. Plus if they run it in 2nd your numbers will be off to. The track is the best place though.