Hey Guys,

Would appreciate some advice on ideal stall for my '89 GTA.

I've been running SLP's 2400 torque converter for 5-6 years, well before I had made some significant changes.

Notable specs:
Factory 9-bolt/3.27 / ProCharged 350 / Comp Cam XFI 08-467-8 (230/236)

Powerband is 2000-6000 and I do drive it 1/2 street, 1/2 strip.

What would you suggest to upgrade for best performance potential stall wise and brand?

Thanks!

 

If your powerband starts at 2000 then a 2500 stall is for street/strip and a 3000 stall for full race. The converter always needs to compliment the camshaft.

The advertised duration of 280/288 would probably handle 2800-3000 for street/strip although that could be pushing it.

Rated stall speed is only an estimate. A converter that's rated for 2400 may stall at 2000 or 2600+ depending on how much torque is put into it. The only way to know a converter's true stall speed is with a transbrake.

 

Thanks for the quick response Stephen.

My current SLP TC seems to only hold to around 1800rpm.
Would it be advantageous to look into a better quality Lock-up like a Vigilante rated 2600-2800 then?

 

How do you know what it holds at? How can I test mine?

 

As Stephen said, the only true way is with a transbrake. I'm only estimating mine is ~1800.

One less accurate way is measured when holding the brakes and running the engine against the locked brakes until a tire rotation.

Another is to launch at WOT and observe the engine RPM reached at launch. This is referred to as flash stall. Wheel spin and the short time allowed for RPM observation makes this pretty inaccurate as well.

 

Maybe look into an edge 2900 stall like I have. Seems like mine is doing its job pretty well.

 

i would go 3000 stall. i bought mine on ebay from "******* performance" its been holing up well now for three years (strip only) l priced one a few months ago for the 700r4 it was $300 for non-lockup and $500 for lockup

 

thats r..e d n e c ..k performance

 

What Pro Charger are you using here? And how much horsepower is it going to add? How do you drive? Conservative? Moderate? Moderately aggressive? or aggressively? Let me know, and I will help you out on the right stall here. Dana

 

Thanks for the replies guys. Just doing a shopping list for this winter and wanted to get an idea what to put aside.

Dana - Glad you stopped in as well.

It's the P1SC, 3-core intercooler and have had it on for over a year.
Have not dyno'd since the upgrade, but I guess could estimate ~425 flywheel hp based on 109 track mph.
I drive conservative-moderate-aggressive depending on the circumstances, lol.

Being streetable is a must, but I would like to make sure the TC compliments the new cam / power output to see an improvement over this older style SLP TC.

 

What do you suggest Dana?

 

With the Pro Charger, moderate driving, (230/236) camshaft and 3.27's, I would go with no more than a 2,800 rpm stall. Super chargers do not need a lot of stall. If you want to find out the stall here after the TC is installed, you could add the governor lockout spring for the test, then remove it afterward. Only takes the reomoval of the governor cover and governor. This allows the transmission to take off in a higher gear. I will supply you with the gasket and spring. If you want this, let me know? Dana