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Idling at 5psi
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41 Posts
Discussion Starter · #1 ·
Well folks, the time has come - Friday I blew my last T-5 trans (#3) ... so I'm going auto (dang it all, I never thought the day would come). I'm looking for advice on where to stall this car. Details that I've found so far leave me thinking about 3500 to 4, leaning towards 36 to 38. (But I don't have a clue!)

Specs on the car: (blah blah blah)
1998 3.8 Pontiac Firebird with a Intercooled ProCharger kit pushing 10-12psi through a stock motor (that's going to change) - starts seeing good boost around 4G. Never had a chance to dyno the car so I don't know what it's hp/tq numbers are, but it was running mid to low 13s at 3400lbs ... and had more in it.

Specs on the trans:
4L60e with a manual valve body built to 11second "bullet proof" range.

No, this isn't a daily driver.
Yes, I'm automatic-challenged... so if there are important details that I've left out, please feel free to slap me and I'll get them as best I can.
 

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Harbinger of War
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1,074 Posts
well if ur car is makgin good power and boost around 4k ud want a higherstall...but keep in mind is this car for street or strip... yank makes real good converters and there is a graph on there site to help u with ur pic... mainly on wat gears u have and wats done to the motor..
 

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Founder
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7,472 Posts
People are getting great results out of the Edge Racing units. I'd suggest a 3200 stall speed.
 

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63 Posts
what kind of converter would be best in a stock lt1. formula?
 

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612 Posts
Pathogen, what are your rear end gears? and waht rear end?
 

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Registered
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1,190 Posts
the answer is right in your question ...
you make boost at 4000 rpm then at 4000 stall should put you right at the begining of your power band off the line.
 
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