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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: 76_Scottsdale on August 27, 2007, 01:32:39 pm

Title: Stall Converter
Post by: 76_Scottsdale on August 27, 2007, 01:32:39 pm

I'm installing a new 700R4 behind a mildly modified 350. I would guess it's no more than 350 horsepower. I was wondering what the best stall converter choice would be. I want to maintain good low end torque and power off the line. I was thinking somewhere between a 2600 or 2800. Thanks again.

ALSO

I was wondering how exactly do I tell if I have a internally or externally balanced motor in terms of purchasing a flexplate? Also how do I know how many teeth the flexplate should have?

Thanks again.

Title: Re: Stall Converter
Post by: VileZambonie on August 27, 2007, 05:22:38 pm

Is there a counterweight on the back of the crankshaft or is it round using the one piece rear main seal? The counterweighted crank is internally balanced. If you have a mild 350 just run the stock converter or a 2000 stall.

Title: Re: Stall Converter
Post by: 76_Scottsdale on August 27, 2007, 11:34:32 pm

The block is a two piece rear main seal. I am swapping this tranny for my SM465 so I'm purchasing a new torque converter. What exactly does a higher stall number do?

Title: Re: Stall Converter
Post by: Captkaos on August 28, 2007, 11:00:16 am

It is internally balanced.  A Stall converter allows the motor to rev higher before actually moving the vehicle.
You should chose a stall based on the components of the engine, trans and gearing and the powerband of the motor.
If you aren't sure what it does, why are you looking at getting one?
What mild components are in your motor? 

The flywheel teeth should match the type of starter you have or the flywheel you removed.  If you are swapping from a flywheel to a flexplate, you will have to get one with the same diameter and the same amount of teeth.

Title: Re: Stall Converter
Post by: VileZambonie on August 28, 2007, 02:04:53 pm

Unless you are going racing or building a weekend warrior I wouldn't go to crazy with a high stall speed. Stall speed basically is when the converter no longer can multiply torque and it stalls at that RPM. For a daily driver keep it close to stock.

Title: Re: Stall Converter
Post by: 76_Scottsdale on August 28, 2007, 02:53:59 pm

Ok Thanks So I need a non-weighted flexplate that I will match to my flywheel and say about a 2000 to 2200 rpm torque converter?

Thanks

Title: Re: Stall Converter
Post by: Captkaos on August 28, 2007, 04:34:18 pm

What kind of cam is in it?  I would stick to a stock stall for a mild motor, it would be about 1800.

Title: Re: Stall Converter
Post by: 76_Scottsdale on August 28, 2007, 07:42:43 pm

Yeah it's has a mild RV cam. Future plans include a new 383 stroker (If money permits) but not for a while so I guess I will upgrade the converter in the future but an 1800 sounds good for now I just didn't know what level the stock ones were around.

Title: Re: Stall Converter
Post by: Captkaos on August 29, 2007, 10:15:25 am

Mild RV means low RPM power, you don't want a stall in that.