Torque convertor stall question

[krazy86t]

Sorry for the double post. I already put this one in the Transmission section, but no response...

Previous owner says he had the stock transmission re-built, not sure who did it. Trans works fine, although auto shifts hit pretty early.

Main problem is stall RPM is very low, so it is hard to build boost at line. SM indicates max RPM = 1600 with foot brake and WOT. Only makes about 3 psi boost.

Does this mean the torque convertor stall RPM = 1600, or are there other factors involved? What torque covertor would be better? Car is mostly stock except TT pump gas chip, 42.5 inj, 3" DP, Pypes exhaust, 340 FP & hotwire.

 

[TurboBob]

sounds like a Monte Carlo SS converter was put in.

The correct stock converter will be 1800-2000 at 0 psi, and around 2300-2400 at 5 psi.

The correct converter will wake the car up a lot, and one slightly looser than stock, even more.

Bob

 

[krazy86t]

The correct converter will wake the car up a lot, and one slightly looser than stock, even more.

Thx! Good sources for more appropriate converter?

 

[TurboBob]

stock turbo? Planning on an upgrade sometime?

A 'loosened' stocker, called a "Red Stripe" years ago (they had a red stripe painted on them) are available from most of the buick vendors. If you have a vendor you have used in the past, start with them.

You may find them used here on the board also, but all used parts are a gamble especially those you can't see inside.

The next step up the price ladder is the 2400 RPM PTC 10" Lockup converter.. These are available thru the usual vendors as well. Dusty Bradford here on the board is the guru on these. This converter is good for stockers and the smaller upgraded turbos.

Matching the turbo to the torque converter is one of the MOST important
things to get right on these cars.

Bob

 

[Dusty Bradford]

I have been doing several restalled D5 converters lately for guys with stock motors and small upgraded turbos. You'll go from your 1600 stall to around 2200-2400 so it will make a noticeable difference.

 

[GNRick]

Dusty-sent you a PM. Thanks.

 

[krazy86t]

I have been doing several restalled D5 converters lately for guys with stock motors and small upgraded turbos. You'll go from your 1600 stall to around 2200-2400 so it will make a noticeable difference.

Interested in getting a converter to bring up stall RPM. What is the "restall" process you mention? I send you current converter and you open it up to change stall? Or put current converter on the shelf and install better converter? How much for an appropriate converter for my application? I don't have near-term plans to change the stock turbo and the car is 96% street DD, with ocassional drag strip passes. Is most appropriate converter = lock-up 10.5" with 2400 stall?

 

[Dusty Bradford]

Interested in getting a converter to bring up stall RPM. What is the "restall" process you mention? I send you current converter and you open it up to change stall? Or put current converter on the shelf and install better converter? How much for an appropriate converter for my application? I don't have near-term plans to change the stock turbo and the car is 96% street DD, with ocassional drag strip passes. Is most appropriate converter = lock-up 10.5" with 2400 stall?

The restalled D5 converters can be bought new or I can restall your converter. It's usually just as simple as taking your converter, cutting it open and installing a stator with a higher stall. This gives you that extra 400-600 rpm of stall.

 

[Roger]

Don't know what was in the TR when I bought it, but it acted like stock Regal (1700 - 1800). According to all the reciepts it had the transmission serviced 3 times.

The Orange crush (3000 stall) I installed changed the TRs attitude completly for the better. Only other upgrade I remember was the 7 disk selling for $1000+ & of course the Red stripe.