New Dyno #'s with my ST3500 ???????
Thread Starter
Launching!
Joined: Nov 2001
Posts: 259
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From: Viginia Beach, VA
New Dyno #'s with my ST3500 ??????? I dynoed my car to see the gains for the torque converter and see how much I picked from mileage also. My first dyno run was done in October of this year with less than 3500 miles on the car. The only mods on the car at the time was FLP headers and a Whisper lid. The car turned a 12.90@106.4 mph with a 1.92 on street tires, the night before the dyno run. November I ran the car again, same weather conditions and the car turned a 12.60@110.12 with a 1.92 on street tires, Mileage was 9300. Yes, I did some long trips in the month of november. So I installed the ST3500 in the begining of December and decided to have it dynoed again Thursday of this week to see the difference of mileage and the torque converter. I lost 23hp! Plus I do not think the dyno operator was getting into the car right. His first pull actually looked normal, the other 2 pulls looked squirrly. I think he jumped on it to late in the last 2 pulls. Air temp between the the dyno runs was a big difference. 1st was at 68 and the second was at a chilly 31. Heres a jpg of my dyno pulls. Tell me what you think happened to lose 23hp. http://members.aol.com/flynelvi/dyno2.jpg
Re: New Dyno #'s with my ST3500 ??????? List all your mods,cuz if it's just a lid and
FLP's and the converter your numbers look right.
(if not high).You were making close to 350rwhp
before the converter?Am I confused here? <img src="images/icons/confused.gif" border="0">
FLP's and the converter your numbers look right.
(if not high).You were making close to 350rwhp
before the converter?Am I confused here? <img src="images/icons/confused.gif" border="0">
Re: New Dyno #'s with my ST3500 ??????? To get a correct reading of RWHP on the dyno w/ TC, the TC needs be locked, either by Tech 2 or manual lockup switch.
In your case it looks like that the dyno operator flashed the TC; thus, you would see a lost in HP but gain in torque.
In your case it looks like that the dyno operator flashed the TC; thus, you would see a lost in HP but gain in torque.
Re: New Dyno #'s with my ST3500 ??????? Also, you need to compare the same kind of HP #, such as SAE # to a SAE #, not a standard # to a SAE #.
On your graph, it says "Actual Horsepower". I'm not sure it means "standard" or "SAE" corrected.
On your graph, it says "Actual Horsepower". I'm not sure it means "standard" or "SAE" corrected.
Re: New Dyno #'s with my ST3500 ??????? From seeing dozens of ST3500 dynos, the rwhp loss for your level is around 12-15 hp, no more. Your dyno comparison is not an apples to apples comparison.
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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 Senior Member
Joined: Nov 2001
Posts: 11,603
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From: Chi-Town, IL
Re: New Dyno #'s with my ST3500 ??????? How much do you think a PI4400 on a TH400 thats non locking soak up?, if im making 360-370rwhp right now and 350rwtq, through a 6-speed trans, I'm doing the TH400 conversion
Thanks.. <img src="gr_stretch.gif" border="0">
[ January 06, 2002: Message edited by: BIGBOS ]</p>
Thanks.. <img src="gr_stretch.gif" border="0">
[ January 06, 2002: Message edited by: BIGBOS ]</p>
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TECH Enthusiast
Joined: Nov 2001
Posts: 620
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From: IL
Re: New Dyno #'s with my ST3500 ??????? Who cares Brian.
You know what kinda power the car makes.
Thru a TH400 and loose converter, you will probably lose a bit.
If you're looking for dyno numbers, then that trans/converter ISN'T what you want.
If you want to go fast at the track, then THAT'S what you're going to get.
Dyno numbers on a non lockup converter mean SQUAT.
You know what kinda power the car makes.
Thru a TH400 and loose converter, you will probably lose a bit.
If you're looking for dyno numbers, then that trans/converter ISN'T what you want.
If you want to go fast at the track, then THAT'S what you're going to get.
Dyno numbers on a non lockup converter mean SQUAT.
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Launching!
Joined: Nov 2001
Posts: 259
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From: Viginia Beach, VA
Re: New Dyno #'s with my ST3500 ??????? Still the same mods, FLP LT's and a Whisper lid. Just added the torque converter and a tranny cooler. Those are uncorrected numbers, corrected was 303hp and 335tq on the last 2 runs, and before the converter it was 326hp and 340tq corrected. No I do not have a lock up switch. So run 3# was because he flashed the converter and runs #4 and #5, looked like that because?
[ January 06, 2002: Message edited by: BigBake ]</p>
[ January 06, 2002: Message edited by: BigBake ]</p>
Thread Starter
Launching!
Joined: Nov 2001
Posts: 259
Likes: 0
From: Viginia Beach, VA
Re: New Dyno #'s with my ST3500 ??????? Ok explain this. On my very first dyno run you will see the normal crossover of horsepower and torque happens at 5250 like it should, but look on the new graph it now occurs at 5000 both graphs are corrected and run #2 is the same run. So why is it different now? Also why do the new runs occur at 4900. I think the dyno was screwed.
http://members.aol.com/flynelvi/dyno1corr.jpg
http://members.aol.com/flynelvi/dyno2corr.jpg
http://members.aol.com/flynelvi/dyno1corr.jpg
http://members.aol.com/flynelvi/dyno2corr.jpg
Staging Lane
Joined: Nov 2001
Posts: 98
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From: Farmingdale NJ
Re: New Dyno #'s with my ST3500 ??????? [quote]Originally posted by DriveATransAm:
<strong>dyno numbers mean jack.
i dynoed 305 hp and like 315 tq with the vig 3200 in. went and ran a 11.9 the next morning.</strong><hr></blockquote>
DITTO, I dynoed 301 rwh and have run a best of 12.1 <img src="gr_stretch.gif" border="0"> . Take it to the track and I'm sure you will be happy. <img src="graemlins/burnout.gif" border="0" alt="[Burnout]" />
Mike
<img src="graemlins/z06.gif" border="0" alt="[Z06 Corvette]" />
<strong>dyno numbers mean jack.
i dynoed 305 hp and like 315 tq with the vig 3200 in. went and ran a 11.9 the next morning.</strong><hr></blockquote>
DITTO, I dynoed 301 rwh and have run a best of 12.1 <img src="gr_stretch.gif" border="0"> . Take it to the track and I'm sure you will be happy. <img src="graemlins/burnout.gif" border="0" alt="[Burnout]" />
Mike
<img src="graemlins/z06.gif" border="0" alt="[Z06 Corvette]" />
On The Tree
Joined: Dec 2001
Posts: 132
Likes: 0
From: Atlanta
Re: New Dyno #'s with my ST3500 ??????? [quote]Originally posted by Patrick G:
<strong>From seeing dozens of ST3500 dynos, the rwhp loss for your level is around 12-15 hp, no more. Your dyno comparison is not an apples to apples comparison.</strong><hr></blockquote>
Why would there be a loss in power? Yank claims the stock coverter is 94% efficient and the ST3500 is 96% efficient.
Thanks.
<strong>From seeing dozens of ST3500 dynos, the rwhp loss for your level is around 12-15 hp, no more. Your dyno comparison is not an apples to apples comparison.</strong><hr></blockquote>
Why would there be a loss in power? Yank claims the stock coverter is 94% efficient and the ST3500 is 96% efficient.
Thanks.
