Curious about dyno numbers and different converter?
Thread Starter
Joined: Nov 2001
Posts: 7,303
Likes: 4
From: Delray Beach, Fl.
Curious about dyno numbers and different converter? If I dyno with a stock verter and make 400RWHP/370RWTQ unlocked.
Then I dyno w/say a VIG 3600 unlocked how will the Dyno numbers compare?More or less power/
This is strickly unlocked info I'm looking for.
JS
Then I dyno w/say a VIG 3600 unlocked how will the Dyno numbers compare?More or less power/
This is strickly unlocked info I'm looking for.
JS
TECH Fanatic
Joined: Nov 2001
Posts: 1,260
Likes: 0
From: High Point North Carolina
Re: Curious about dyno numbers and different converter? Someone did this not that long ago. The torque numbers with the convertor were crazy high, but the HP was down compared to the stock convertor....
Re: Curious about dyno numbers and different converter? JS,
The unlocked numbers will be quite a bit lower on the Vig 3600 vs. the stock converter, but it's not just an efficiency thing. See, a high stall converter like a Vig 3600 is going to instantly get the motor into its powerband very quickly, thus making the dyno run much shorter. This will skew the dyno results lower just like running a car with 4.10 gears vs. 3.23 gears on the chassis dyno will.
Sure the Vig is going to be less efficient than the stock converter: its smaller size and larger clearances will not give it the holding capacity of the larger stock converter. On the other hand, the Vig 3600 is going to be about 20 lbs lighter, which will help acceleration on the chassis dyno (and the track) which will help make up some of this horsepower. The unlocked Vig will be down about 15-20 rwhp unlocked vs. the stock converter. Locked, the Vig 3600 will be about 10 rwhp better because of its lighter weight.
The unlocked numbers will be quite a bit lower on the Vig 3600 vs. the stock converter, but it's not just an efficiency thing. See, a high stall converter like a Vig 3600 is going to instantly get the motor into its powerband very quickly, thus making the dyno run much shorter. This will skew the dyno results lower just like running a car with 4.10 gears vs. 3.23 gears on the chassis dyno will.
Sure the Vig is going to be less efficient than the stock converter: its smaller size and larger clearances will not give it the holding capacity of the larger stock converter. On the other hand, the Vig 3600 is going to be about 20 lbs lighter, which will help acceleration on the chassis dyno (and the track) which will help make up some of this horsepower. The unlocked Vig will be down about 15-20 rwhp unlocked vs. the stock converter. Locked, the Vig 3600 will be about 10 rwhp better because of its lighter weight.
__________________
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.
Thread Starter
Joined: Nov 2001
Posts: 7,303
Likes: 4
From: Delray Beach, Fl.
Re: Curious about dyno numbers and different converter? Okay Patrick I understand,So if I dynoed 400RWHP unlocked w/the stocker then put the VIG in it'll drop down to 380RWHP,Correct?
Not to mention adding 3.73's to the mix is gonna drop it another 3 or 4 RWHP over 3.23's?
JS
[ March 09, 2002: Message edited by: JS ]</p>
Not to mention adding 3.73's to the mix is gonna drop it another 3 or 4 RWHP over 3.23's?
JS
[ March 09, 2002: Message edited by: JS ]</p>
Re: Curious about dyno numbers and different converter? 20 rwhp loss wouldn't surprise me JS, especially if you're adding gears too. Funny thing is, this is mostly a dyno phenomenon. You won't see a drop in mph at the track...rather a gain! Converters are weird that way. Just look at Raughammer running 125 mph with only 390 rwhp (unlocked YTP4400).
__________________
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.
Re: Curious about dyno numbers and different converter? JS don't forget that things like tuning, ud pulley, ported TB, and other small mods are going to bring that number back up again.
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Staging Lane
Joined: Mar 2002
Posts: 82
Likes: 0
From: Amarillo, TX
Re: Curious about dyno numbers and different converter? So is the efficiency of the TC measured by comparing dyno numbers between the stock converter and whichever after market TC you're going with? I know PI's are said to be less efficient but I don't understand exactly how it's measured.
Eric
Eric
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