will more horsepower increase stall?

[Mike70gtx]

I'm upgrading my combo for the second time before I get my new motor in the car. I have an Art Carr 9 1/2 lu set to stall at 3000 for the te60. I've now got a pt67 on the way. Called Art Carr and asked about the stall and said the extra horsepower created by the bigger turbo would cause that convertor to stall higher and it should work. Of course they do re-stall the first year. Is it worth an try or should I get it restalled before the install?

 

[WSLN 6]

It's kinda like the chicken before the egg scenario....lol
The problem is, the bigger turbo can't make more power until it spools up..........I would say go for 3500 stall and be done with it. Lotsa fun on the street!

 

[wbrophy]

I would try it before I had the stall changed.

 

[ChrisCairns]

High stall is good. I doubt you'd be able to get into the sweet spot (not talking vaginas here) with that converter/turbo.

Send off the converter...have it done before the turbo change. Betcha you'd like the stall change even before the turbo change.

 

[Mike70gtx]

thanks for the thoughts. I'll still be a month or two out before I get this motor in. If I sent it off now I wouldn't have any dead time and wouldn't have to take it out again.
P.S. This won't really effect my mileage that much. I'm sure once I'm down the highway and locked up it wouldn't, what about the rest of the time?]

 

[Ttype6]

Will More horsepower Increase stall

It's torque, not horespower that increases stall speed. If you put a motor ( that makes more low rpm torque ) in front of your current converter, it will stall at a higher rpm. Its torque (the measure of an engine's ability to do work ) that a drag racer needs most of all. Horsepower is a measure of How fast the work gets done. It takes a lot of work to , rapidly, put a heavy stationary object into motion. When you put the bigger turbo on, your motor will make less ( low rpm ) torque. Now you have to rev the motor up higher to make the torque you used to make with the smaller turbo,which is what WSLN6 is saying. The only way to do that is to increase the stall speed in your converter,which he is also saying. He just used a lot less words. Do this, and your motor will be able to reach that sweet spot Chris Cairns is talking about.

 

[Mike70gtx]

Thanks for the explanation. That is what I was trying to fiqure out with my limited knowledge.

 

[Ormand]

I mostly agree with what Ttype6 said. My only comment is that he says the bigger turbo WILL make less low rpm torque. That may be true, but with the converter you have, it actually may get into the curve far enough that the bigger turbo will make more torque, not less. So, being basically cheap, I would try it with the old converter, then get the converter changed if it doesn't work well. It's more work that way, but you have a chance at saving some $$$, for fixing things that break.

 

[strikeeagle]

Gas mileage. What's that? Is that the distance between your house and the nearest race gas?

 

[wbrophy]

Originally posted by wbrophy
I would try it before I had the stall changed.

PS: To gain more performance I changed to a higher stall converter only to lose 4 tenths and 4 mph, changed back and the performance came back, that is why I susgested to try it first (at the track) seat of the pants sometimes lies. Example: locking 2 and/or 3 rd. gear (drive) with a near stocker and not going to 4 th. gave better 1/4 mile times most of the time, but the lock-up felt like it was pulling the car down more than it gained.

 

[wbrophy]

These are low rpm engines 5500rpm or so, to loose of a converter may slip to much on the top and you will never know because you have nothing to compare. but if you have a strong lock up that may solve the problem?

 

[Ttype6]

The bigger turbo will make more horsepower and torque. The only question is, at what rpm? Since you dont know the answer to that question, it makes good sence to take Ormand's advice. The two things that will happen are, you won't be changing two things at once (good thing ), and you'll learn for yourself what happens when you go to a larger turbo. Ormand is'nt being cheep, he's using common sence.

 

[Mike70gtx]

First, I do get one free stall done.
Second, with a 9 1/2 (single disk I believe) It's not a good idea to lock it up at the track, correct?

 

[wbrophy]

Originally posted by Mike70gtx
First, I do get one free stall done.
Second, with a 9 1/2 (single disk I believe) It's not a good idea to lock it up at the track, correct?

One disk in most non-stock cases from what I have read do not last long.

 

[Ttype6]

Torque Converte Lockup

It's a great idea. It works, ( 2 tenths ) ,and you can feel it. Your car will pull so hard. I burned up a 9-11 doing this. I'm thinking about going to a 9.5 multy disk.