Is this a good dyno for an ST-3500???
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TECH Enthusiast
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From: Las Vegas, NV
Is this a good dyno for an ST-3500??? I dynoed the car and here are the numbers before the ST-3500 convertor and after. I lost a little bit of HP, but gained a lot of TQ!!!
Before ST-3500:
328.6 RWHP
344.5 RWTQ
With ST-3500 (unlocked)
314.1 RWHP
370.7 RWTQ
What do you all think. Good or not? See sig for mods.
Before ST-3500:
328.6 RWHP
344.5 RWTQ
With ST-3500 (unlocked)
314.1 RWHP
370.7 RWTQ
What do you all think. Good or not? See sig for mods.
TECH Enthusiast
Joined: Nov 2001
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From: Newport Coast, Ca
Re: Is this a good dyno for an ST-3500??? [quote]Originally posted by Top Fuel:
<strong>The only accurate way of testing out a converter is the track. <img src="gr_grin.gif" border="0"> </strong><hr></blockquote>
that is so true!!! <img src="gr_grin.gif" border="0">
seriously though..you didn't loose to much at all by my standards, but you picked up major major torque!!
<strong>The only accurate way of testing out a converter is the track. <img src="gr_grin.gif" border="0"> </strong><hr></blockquote>
that is so true!!! <img src="gr_grin.gif" border="0">
seriously though..you didn't loose to much at all by my standards, but you picked up major major torque!!
TECH Apprentice
Joined: Nov 2001
Posts: 303
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From: Chicagoland Area
Re: Is this a good dyno for an ST-3500??? [quote]Originally posted by Gearhead:
<strong>Why would there be a loss of HP if the Yank is more efficient than the stock converter?</strong><hr></blockquote>
It just adds to the mystery of dynoing an A4 w/converter. <img src="images/icons/confused.gif" border="0">
<strong>Why would there be a loss of HP if the Yank is more efficient than the stock converter?</strong><hr></blockquote>
It just adds to the mystery of dynoing an A4 w/converter. <img src="images/icons/confused.gif" border="0">
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Re: Is this a good dyno for an ST-3500??? You have mods VERY similar to me, and we're putting down nearly exact #'s. I'm running the Vig 3200, and I did 315 RWHP unlocked and 332.9 RWHP locked. I would like to see what your car puts to the wheels w/ the converter locked.
Get it to the track, and watch it shine. You can't beat the performance of a good torque converter! <img src="graemlins/burnout.gif" border="0" alt="[Burnout]" />
Get it to the track, and watch it shine. You can't beat the performance of a good torque converter! <img src="graemlins/burnout.gif" border="0" alt="[Burnout]" />
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Re: Is this a good dyno for an ST-3500??? The way Yank dyno tests their converters is very different than how most of you do. By using the Yank Tranny Tricker, the dyno operator can hold the transmission in 3rd gear at idle. They let the tire make one rotation off idle then stab the throttle. This will show the true torque multiplication properties of a converter, plus the longer pull gives a more accurate reading of top-end efficiency. It's the only way to do it right.
Stabbing the throttle on a car that's already going 70mph on a chassis dyno does little to show torque multiplication of the converter and makes the looser converters look very inefficient compared to the stock converters. Stabbing the throttle from a dead stop shows everything.
Stabbing the throttle on a car that's already going 70mph on a chassis dyno does little to show torque multiplication of the converter and makes the looser converters look very inefficient compared to the stock converters. Stabbing the throttle from a dead stop shows everything.
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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.
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.
TECH Regular
Joined: Nov 2001
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From: San Antonio, TX
Re: Is this a good dyno for an ST-3500??? I dynoed 319 rwhp (unlocked) and 350tq. Damn, I love your torque number. <img src="gr_stretch.gif" border="0">
[ January 16, 2002: Message edited by: Loco ]</p>
[ January 16, 2002: Message edited by: Loco ]</p>
TECH Apprentice
Joined: Nov 2001
Posts: 356
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From: Tucson, AZ
Re: Is this a good dyno for an ST-3500??? I dynoed...
Before ST3500:
312rwhp 325tq
After ST3500:
307rwhp 361tq
Between the two dyno's I went from clogged cats to no cats, so that is why I didn't lose as much as you guys did. I'd say your losses sound about right. As Patrick G said, those numbers aren't real accurate anyway so you shouldn't sweat it. I clicked off a 1/4 ET whih is on average 8 tenths of a second better with the ST3500 so I couldn't be more pleased, why should I care if on paper my SS has 5rwhp less if I'm runnning almost a whole second quicker at the track? <img src="gr_grin.gif" border="0"> <img src="gr_grin.gif" border="0"> <img src="gr_grin.gif" border="0">
Before ST3500:
312rwhp 325tq
After ST3500:
307rwhp 361tq
Between the two dyno's I went from clogged cats to no cats, so that is why I didn't lose as much as you guys did. I'd say your losses sound about right. As Patrick G said, those numbers aren't real accurate anyway so you shouldn't sweat it. I clicked off a 1/4 ET whih is on average 8 tenths of a second better with the ST3500 so I couldn't be more pleased, why should I care if on paper my SS has 5rwhp less if I'm runnning almost a whole second quicker at the track? <img src="gr_grin.gif" border="0"> <img src="gr_grin.gif" border="0"> <img src="gr_grin.gif" border="0">
Thread Starter
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From: Las Vegas, NV
Re: Is this a good dyno for an ST-3500??? Sounds like my car did ok on the dyno then. That is cool!! <img src="gr_stretch.gif" border="0"> <img src="graemlins/fluffy.gif" border="0" alt="[Fluffy]" /> <img src="gr_grin.gif" border="0">