Mustang Stall Speed

[95blacksnake]

Just wondering how much a stall speed of 2500-2800 would help my 01GT with nitrous and bolt ons. Is this a waste of money for the amount of stall speed? How muc better will it be than stock?

 

[YtnGT]

Just wondering how much a stall speed of 2500-2800 would help my 01GT with nitrous and bolt ons. Is this a waste of money for the amount of stall speed? How muc better will it be than stock?

I could be wrong but the stock 99+ 4r70w TC stall speed is 2500-2600rpm. I think I remember reading it somewhere. When I flash stall my stock converter the rpms immediatly jump up to 2500.

Also I am in the process of installing a NX kit on my stang... I would not want a higher stall speed converter with N2O. When I come off the line with good traction the rpms are immediatly at 2500+. With my window switch set at 3000 the N2O will start very shortly after launch. Without slicks I am pretty sure that I will have traction problems, with 100 shot.

Stick with the stock TC and invest in N2O safety equipment, a good suspension, and a stout rear end. Then when the suspension and traction issues are perfected a higher stall TC might work out well. Just think... Spray right off the line with a 3000 stall TC... 1.6 sec 60'

 

[DBMSTNG]

my stall is about 1200rpm. maybe a little less. stock convertor.

 

[YtnGT]

my stall is about 1200rpm. maybe a little less. stock convertor.

How do you know?


FYI TCs are rated using "K" factor not rpms because the stall speed is determined by the K factor and the amount of torque your engine produces. The more torque you engine produces the higher the stall spees is going to be.

 

[DBMSTNG]

How do you know?


FYI TCs are rated using "K" factor not rpms because the stall speed is determined by the K factor and the amount of torque your engine produces.

i'm probably not talking about the same thing. i'm talking about when the brakes can no longer keep the car from moving. my bad.

The more torque you engine produces the higher the stall spees is going to be.

i thought it was the other way around, maybe i'm wrong.

 

[YtnGT]

I just went to TCCOA and checked just to make sure. Yes stall speed increases with torque and "K" = rpm/sqrt of torque

FYI.........

 

[95CobraStang]

I could be wrong as well (so i probably shouldn't even be responding), but im pretty sure stock stall is around 1800

 

[YtnGT]

Oh No Math...

Lets see if I can put a little math to work...

K = rpm / sqrt of torque
TCCOA states that 96+ mustang TCs the K factor = 155
Assume that torque is 200 lb/ft at low rpms

solve for rpm

rpm = K * sqrt of torque
rpm = 155 * (200^1/2)
rpm = 2192

So how about that I calculated a stall speed of 2200 rpm assuming the K factor = 155 and torque at 2200rpm = 200 lb/ft

The same equation yields 2450 rpm stall speed if your engine produces 250 lb/ft at 2450 rpm.

Check out the link I previously posted for more information.

Later