Were's My Torque?
11-19-2007, 06:29 PM
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Were's My Torque? with mods in sig, why am i not over 400ft ibs of torque? i have great components working together. my SCR is 11.3:1 and DCR is 8.6. why am i not well over 400 ft ibs of torque like most of the other good setups out there? lets here those ideas
11-19-2007, 06:35 PM
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I'd say your cam selection has sacrificed some torque and power under the curve for peak horsepower. Something with less duration would put you in the 400's for sure while sacrificing 10-15hp. But, that's just my guess.
11-19-2007, 07:00 PM
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hmmmmm. i would think your combo should have hit 400 rwtq also.do you know what your timing is at peak tq ? with a 228r on a 112 +2,tea 5.3 57 cc heads,11:7 scr/8:9 or so dcr i hit 402 rwtq around 4800 rpms with 350 @ 3k. the fast 90/90 was box stock also.
11-19-2007, 09:14 PM
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Yeah I'm suprised, u and me have very similar setups, except my cam is a 228/228 113 lsa. The other difference is my unported fast. Have u taken it to the tuner, who did the tune. Did u build the combo yourself and have someone tune it. Good luck, keep us posted.
11-19-2007, 10:12 PM
#6
You have lots of dyno-power-robbing mods:
4.10 gears
Spec billet steel flywheel
18" wheels and tires
cats could be causing you problems too.
I had high flow cats on my Kooks headers. At first, they were great. Within 1 rwhp of open. But after a year, my power fell off. Found out my bricks were trashed inside the cats. Gutted the cats and got my lost power back.
Never assume that your cats are flowing 100% without checking them often.
If your timing is around 28 degrees at peak torque and your A/F ratio is around 12.5:1, then you've left no torque on the table in the tune. If all fails, find another dyno.
4.10 gears
Spec billet steel flywheel
18" wheels and tires
cats could be causing you problems too.
I had high flow cats on my Kooks headers. At first, they were great. Within 1 rwhp of open. But after a year, my power fell off. Found out my bricks were trashed inside the cats. Gutted the cats and got my lost power back.
Never assume that your cats are flowing 100% without checking them often.If your timing is around 28 degrees at peak torque and your A/F ratio is around 12.5:1, then you've left no torque on the table in the tune. If all fails, find another dyno.
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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.
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11-20-2007, 03:52 AM
#8
In my experience, this is not true with the Mamo-ported FAST. Every dyno comparison I've seen shows it out-powering the LS6 intake in the low and mid-range. Other porters may hog out the runners and hurt velocity but not Tony.
__________________
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.
11-20-2007, 07:23 AM
#9
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i had a spec 3 also but stock gears and no cats.if the cats are starting to clog wouldn't it hurt peak hp as much or more than peak tq ? peak hp looks on par so it could possibly be the gears causing you to show you have less tq. either way 393 rwtq along with 4:10 cogs is still decent tq .hopefully you find the missing tq you are looking for.
11-20-2007, 08:43 AM
#10
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this really makes me wanting one. 
sweet ride slow trap