How do you test the stall speed of a converter?
How do you test the stall speed of a converter? I have a Vig3200 and I am not sure that it is stalling / flashing as high as it should be. Is there a way I can get a good idea that is performing the way a Vig3200 should be?
Thanks
John
<small>[ March 23, 2002, 07:55 PM: Message edited by: JNorris ]</small>
Thanks
John
<small>[ March 23, 2002, 07:55 PM: Message edited by: JNorris ]</small>
TECH Senior Member
Joined: Nov 2001
Posts: 9,246
Likes: 3
From: Troy, AL
Re: How do you test the stall speed of a converter? How high can you foot stall it, John?
If you had a '00 or newer you could check the stall by placing it in 2nd and foot stalling it at WOT.
If you had a '00 or newer you could check the stall by placing it in 2nd and foot stalling it at WOT.
Re: How do you test the stall speed of a converter? Stephen, it will foot stall to about 2600 with street tires on my concrete driveway.
See the Atap data below.
Brake Stall data
<small>[ March 25, 2002, 09:51 AM: Message edited by: JNorris ]</small>
See the Atap data below.
Brake Stall data
<small>[ March 25, 2002, 09:51 AM: Message edited by: JNorris ]</small>
TECH Regular
Joined: Nov 2001
Posts: 499
Likes: 0
From: Clarkston
Re: How do you test the stall speed of a converter? I've got the same question!
I recently sent my 2800 back for a restall. What I got back (not my converter!) was a converter in an empty box, no paperwork, nothing. To me, it feels the same???
Leaving it in drive, I can brake stall to about 2600 (exactly where my 2800 would stall to). I logged some WOT runs and the only thing I noticed different from my previous converter was that my RPM's between shifts were not dropped quite as far, about 125 less than before. (the difference between my stock converter and the 2800 was more like a grand less drop - that is what I was expecting but I would expect a Vig 3200 to be more like a 300RPM (dropping 300 less on shifts) diff from a 2800)
Oh yea, tryed monitoring trans input shaft PRM compared to RPM, couldn't make heads or tales of that!!
Any thoughts!
Mark
I recently sent my 2800 back for a restall. What I got back (not my converter!) was a converter in an empty box, no paperwork, nothing. To me, it feels the same???
Leaving it in drive, I can brake stall to about 2600 (exactly where my 2800 would stall to). I logged some WOT runs and the only thing I noticed different from my previous converter was that my RPM's between shifts were not dropped quite as far, about 125 less than before. (the difference between my stock converter and the 2800 was more like a grand less drop - that is what I was expecting but I would expect a Vig 3200 to be more like a 300RPM (dropping 300 less on shifts) diff from a 2800)
Oh yea, tryed monitoring trans input shaft PRM compared to RPM, couldn't make heads or tales of that!!
Any thoughts!
Mark
Re: How do you test the stall speed of a converter? Sparky, your expectations and complaints are the same as mine. I just had my vig2800 re-stalled to a 3200 and it feels tighter that before.
This past Friday I went to the track and managed to cut a 1.64 and a 1.62 60ft with the "3200". I was cutting 1.65 - 1.67 60' all the time with the 2800. I was expecting a 1.59 60' with the 3200.
Can you email me some of your Atap files of the new 3200 converter?
jnorris404@aol.com
Have you spoke to PI about your concerns?
You can see Atap data from some of my runs with the 2800 and 3200 at the following links.
2800 data
ftp://members.aol.com/jnorris404/2800data.htm
3200 data
ftp://members.aol.com/jnorris404/3200data.htm
Thanks
John
<small>[ March 24, 2002, 08:39 PM: Message edited by: JNorris ]</small>
This past Friday I went to the track and managed to cut a 1.64 and a 1.62 60ft with the "3200". I was cutting 1.65 - 1.67 60' all the time with the 2800. I was expecting a 1.59 60' with the 3200.
Can you email me some of your Atap files of the new 3200 converter?
jnorris404@aol.com
Have you spoke to PI about your concerns?
You can see Atap data from some of my runs with the 2800 and 3200 at the following links.
2800 data
ftp://members.aol.com/jnorris404/2800data.htm
3200 data
ftp://members.aol.com/jnorris404/3200data.htm
Thanks
John
<small>[ March 24, 2002, 08:39 PM: Message edited by: JNorris ]</small>
TECH Regular
Joined: Nov 2001
Posts: 499
Likes: 0
From: Clarkston
Re: How do you test the stall speed of a converter? I havent' had track runs yet (interesting on yours).
I can send you the atap logs but the real interesting data I got revolves around RPM drops in between shifts. (One of the benefits of higher stall converters is that they don't drop as much between shifts, right?) Below is a comparision of my stock converter to my 2800 and to my "mystery" converter.
RPM Drops To This RPM On Shifts
Shift Stock 2800 Mystery
1/2 3825 4780 4885
2/3 4090 4800 4910
I should be seeing about 300 higher on RPM's with the new one. I'm actually seeing around 110. Couple that with the fact that they brake stall the same . . . sounds like the same to me! (Oh, yea, just dyno'd this morning - my HP and Tq figures are identical to my dyno in Dec)
Yea, my shop talked to "Jack" at PI. He insists he sent me back my converter (BS: it was a brand new one that obviously wasn't open and resealed) and that I'm wrong, it's stalled as requested.
We're going to take one more shot at them with the data we have. If no luck, screw'm, I guess I just switched to Yank - and I'll let everyone know it!
Mark
I can send you the atap logs but the real interesting data I got revolves around RPM drops in between shifts. (One of the benefits of higher stall converters is that they don't drop as much between shifts, right?) Below is a comparision of my stock converter to my 2800 and to my "mystery" converter.
RPM Drops To This RPM On Shifts
Shift Stock 2800 Mystery
1/2 3825 4780 4885
2/3 4090 4800 4910
I should be seeing about 300 higher on RPM's with the new one. I'm actually seeing around 110. Couple that with the fact that they brake stall the same . . . sounds like the same to me! (Oh, yea, just dyno'd this morning - my HP and Tq figures are identical to my dyno in Dec)
Yea, my shop talked to "Jack" at PI. He insists he sent me back my converter (BS: it was a brand new one that obviously wasn't open and resealed) and that I'm wrong, it's stalled as requested.
We're going to take one more shot at them with the data we have. If no luck, screw'm, I guess I just switched to Yank - and I'll let everyone know it!
Mark
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Re: How do you test the stall speed of a converter? actually that 60ft dropis pretty good... it takes alot of power to start dropping the 60's
but i would say that 60 is about right on for a 3200.. it all depends on car weight, mods and etc...
example, im only 60ing 1.60 with my 3600 on nittos, but on et streets i think i would be in the 1.56's give or take..
how much did it drop you in the 1/4th??
but you can atap to get a idea.. mine flashed to 4000 on atap, but atap is kinda slow, but it will give ya a rough idea
but i would say that 60 is about right on for a 3200.. it all depends on car weight, mods and etc...
example, im only 60ing 1.60 with my 3600 on nittos, but on et streets i think i would be in the 1.56's give or take..
how much did it drop you in the 1/4th??
but you can atap to get a idea.. mine flashed to 4000 on atap, but atap is kinda slow, but it will give ya a rough idea
Re: How do you test the stall speed of a converter? Sparky-
I have been working with Jack at PI to resolve my issues. He has been very willing to help me solve my dissatisfaction with the converter. I am pulling out the 3200 this week and sending it back for Jack to look at it and confirm that it is really a 3200.
I have been working with Jack at PI to resolve my issues. He has been very willing to help me solve my dissatisfaction with the converter. I am pulling out the 3200 this week and sending it back for Jack to look at it and confirm that it is really a 3200.
Re: How do you test the stall speed of a converter? 98TAauto- My race weight is 3352. Mods are bolt-ons. There was NO improvement in the ¼ with the addition of the 3200. My best ET with the 3200 is 11.96 @ 111.82 with a 1.629 60’. The best with the 2800 was an 11.95 @ 112.65 with a 1.648 60’. Both runs had similar weather conditions. The run with the 3200 had the better conditions of the two.
My 3200 has never flashed above 3056 rpm. My 2800 flashed to 3100.
My 3200 has never flashed above 3056 rpm. My 2800 flashed to 3100.
Re: How do you test the stall speed of a converter? hey guys.. the 3200 might feel tighter because of the higher STR...
Sparky.. didn't you upgrade to 3.73's are the same time? That would make it feel much tighter.
Sparky.. didn't you upgrade to 3.73's are the same time? That would make it feel much tighter.
Re: How do you test the stall speed of a converter? I judged my new re-stalled Vig3200 converter to be tighter than the Vig2800 converter based on the following.
1- Gear engagement when selecting Drive or Reverse is much firmer than with the 2800.
2- When the 2800 was installed the shifts were sloppy so I had a TransGo shift kit installed and the shifts were still a little soft for my liking. Now that the 3200 is installed the car spins the tires when it hits 2nd. This only happens at about 75% throttle. Overall the shifts feel firmer with the 3200 than they did with the 2800. Could this be due to the higher STR?
3- Not seeing the improvement in 60ft time that I was expecting. I was expecting 1.58 – 1.60 60ft times. Am I expecting too much from this converter?
4- The Vig3200 stalling and flashing to a RPM that was equal to or less than the Vig2800 that it was re-stalled from. From what I understand a Vig2800 should flash to about 3000 – 3100RPM behind a bolt-on LS1 and a Vig 3200 should flash to 3500 – 3700RPM a bolt-on LS1.
5- Shift extensions with the 3200 that were equal or less than the shift extensions I had with the Vig2800.
Overall I was expecting a looser converter that had less drivability and better track performance than the Vig2800. What I have is a converter that seems to have better drivability and marginally (1.648 60 vs 1.629 60) better track performance. Maybe I am having traction problems. I am running ET Streets with a race weight of 3352lbs.
Am I expecting too much from this converter?
The 3200 feels like it hits harder off the line than the 2800 it was re-stalled from.
Will a converter become “looser” and perform better over time?
John
<small>[ March 27, 2002, 07:36 PM: Message edited by: JNorris ]</small>
1- Gear engagement when selecting Drive or Reverse is much firmer than with the 2800.
2- When the 2800 was installed the shifts were sloppy so I had a TransGo shift kit installed and the shifts were still a little soft for my liking. Now that the 3200 is installed the car spins the tires when it hits 2nd. This only happens at about 75% throttle. Overall the shifts feel firmer with the 3200 than they did with the 2800. Could this be due to the higher STR?
3- Not seeing the improvement in 60ft time that I was expecting. I was expecting 1.58 – 1.60 60ft times. Am I expecting too much from this converter?
4- The Vig3200 stalling and flashing to a RPM that was equal to or less than the Vig2800 that it was re-stalled from. From what I understand a Vig2800 should flash to about 3000 – 3100RPM behind a bolt-on LS1 and a Vig 3200 should flash to 3500 – 3700RPM a bolt-on LS1.
5- Shift extensions with the 3200 that were equal or less than the shift extensions I had with the Vig2800.
Overall I was expecting a looser converter that had less drivability and better track performance than the Vig2800. What I have is a converter that seems to have better drivability and marginally (1.648 60 vs 1.629 60) better track performance. Maybe I am having traction problems. I am running ET Streets with a race weight of 3352lbs.
Am I expecting too much from this converter?
The 3200 feels like it hits harder off the line than the 2800 it was re-stalled from.
Will a converter become “looser” and perform better over time?
John
<small>[ March 27, 2002, 07:36 PM: Message edited by: JNorris ]</small>
Re: How do you test the stall speed of a converter? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by JNorris:
<strong>...Now that the 3200 is installed the car spins the tires when it hits 2nd. This only happens at about 75% throttle. ... Could this be due to the higher STR?
...Not seeing the improvement in 60ft time that I was expecting... Maybe I am having traction problems. I am running ET Streets with a race weight of 3352lbs.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yes, that would be STR, Stall Torque Ratio (How it hits the tires)
It is possible that it is spinning. With my current setup.. I've yet to hook up.. mines more of a suspension issue. Don't think because it's 3200 that it wouldn't boil the ET streets <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
<strong>...Now that the 3200 is installed the car spins the tires when it hits 2nd. This only happens at about 75% throttle. ... Could this be due to the higher STR?
...Not seeing the improvement in 60ft time that I was expecting... Maybe I am having traction problems. I am running ET Streets with a race weight of 3352lbs.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yes, that would be STR, Stall Torque Ratio (How it hits the tires)
It is possible that it is spinning. With my current setup.. I've yet to hook up.. mines more of a suspension issue. Don't think because it's 3200 that it wouldn't boil the ET streets <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Re: How do you test the stall speed of a converter? WILWAXU- So you are saying that the “firmer” shifts and tire spinning on the 1-2 shift could be caused by the higher STR of the 3200 over the 2800 thus giving the impression of a tighter converter?
What is the difference in STR between the 2800 and 3200?
This past Friday the track was a little slick. I ran about 8 times and had 2 sub 1.65 60’ the rest were 1.8 plus 60’.
The last thing I want to do is to have this converter pulled out and sent back to PI to be checked out only to find out there is nothing wrong with it -major waste of $money$-. Maybe the lack luster 60ft improvements were caused by poor track conditions.
This still does not explain the stalling and flashing RPM numbers that are not as good as the vig2800 numbers.
I would really link to see some AutoTap runs of a bolt-on LS1 with 3.23 gears and a vig 3200.
John
What is the difference in STR between the 2800 and 3200?
This past Friday the track was a little slick. I ran about 8 times and had 2 sub 1.65 60’ the rest were 1.8 plus 60’.
The last thing I want to do is to have this converter pulled out and sent back to PI to be checked out only to find out there is nothing wrong with it -major waste of $money$-. Maybe the lack luster 60ft improvements were caused by poor track conditions.
This still does not explain the stalling and flashing RPM numbers that are not as good as the vig2800 numbers.
I would really link to see some AutoTap runs of a bolt-on LS1 with 3.23 gears and a vig 3200.
John
Re: How do you test the stall speed of a converter? man, you are having the same doubts i am. i can only muster a 1.71 N/A on e.t. streets in my lid/exhaust/full weight '98Z with 3.23's. i guess i don't have the power to get a good 60ft. i could get 1.5's on the juice when i had it. so maybe it is just my heavy weight and lack of mods.
Chris
Chris
TECH Fanatic
Joined: Nov 2001
Posts: 1,410
Likes: 0
From: north dallas
Re: How do you test the stall speed of a converter? oh yeah...
i have long tubes, intake, exhaust, hypertech (usually no power tune programmed). it did it when i only had intake and exhaust though <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> on a 4.8L
i have long tubes, intake, exhaust, hypertech (usually no power tune programmed). it did it when i only had intake and exhaust though <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> on a 4.8L
Re: How do you test the stall speed of a converter? My Yank TP-E4400 feels pretty tight since I sent it back to be restalled.
Mine will footbrake up to about 2300. I doubt it's much more than a 3600 stall now. I'm not sure...
Mine will footbrake up to about 2300. I doubt it's much more than a 3600 stall now. I'm not sure...