Powerglide VS Torqueflite

[vance.dykes]

call Rick at A & A trans he has different gear sets for the 727 and they work great .when he first open he was one of the first to offer something for us mopar hard liners. ALL MOPAR OR NO CAR.

 

[AndersonTommy]

I tried a power glide for 1 weekend and it was the biggest disappointment ever.
I thought my Torqueflite wouldn't handle 1180hp at the time.
Went out 1st time with the Torqueflite and ran 8.57@160.
But the 4th pass I smoked the clutches.
Pulled it out and wasted $5700.00 on a ATI Powerglide.
Went 9.11 next outing.
Only to find out that the Torqueflites Griner valvebody was defective.
Got it fixed and put the Torqueflite back in.
Ran 4 years without any problems.
Now new combo is 1275hp and going to try the Torqueflite still and see if it can handle it.
I did remove the low gear sets.
A& A low gear sets cant take 900 ft.lbs of torque

 

[Frank Mopar]

Trap rpm should dictate your gear ratio, tire size and to some extent torque converter. Where are you at rpm wise in the traps?

I would lower rpm shift light if you want it to shift at lower rpm
IMHO

 

[Mike Gaines]

Trap rpm should dictate your gear ratio, tire size and to some extent torque converter. Where are you at rpm wise in the traps?

I would lower rpm shift light if you want it to shift at lower rpm
IMHO

On a 140.04 run I was trapping 7200 thru the lights. 4.56 gear, 32" tall tires with 105" rollout and a 5500+ converter....and this was with the restrictor plates set to reduce airflow thru the twin Dominators by 50%....so...I would guess with the carbs opened up all the way it is going to be closer to 150mph at, of course, a higher rpm thru the traps.
And, sure, I will set the shift light to about 6000 because I do want to shift at 6500.

 

[Tex013]

On a 140.04 run I was trapping 7200 thru the lights. 4.56 gear, 32" tall tires with 105" rollout and a 5500+ converter....and this was with the restrictor plates set to reduce airflow thru the twin Dominators by 50%....so...I would guess with the carbs opened up all the way it is going to be closer to 150mph at, of course, a higher rpm thru the traps.
And, sure, I will set the shift light to about 6000 because I do want to shift at 6500.

Mike , maybe time to look at gearing . Doug runs a 4.1 iirc . The lower gear will let you run a little longer through the gears plus lower trap rpm

Tex

 

[dvw]

On a 140.04 run I was trapping 7200 thru the lights. 4.56 gear, 32" tall tires with 105" rollout and a 5500+ converter

That is big time slippage, nearly 11%
Doug

 

[AndersonTommy]

Mike I think you're in the right ballpark with that trap rpm.
You might be 7400-7500 at a true WOT Trap speed.
I think you might be perfect as is. I wouldn't touch a thing.
Espe

 

[Mike Gaines]

On a 140.04 run I was trapping 7200 thru the lights. 4.56 gear, 32" tall tires with 105" rollout and a 5500+ converter

How do you calculate the slippage....I have never had to address anything like this before. Thanks
Plus...Doug, what is your gear ratio, tire rollout and converter flash and trap rpm and what top speed....for me to try to figure out where I need to be...thanks again, Mike

 

[AndersonTommy]

Mike check out Wallace calculator.
Plug in all the information . They have a converter slippage program.

 

[dvw]

In decent air; 4.30, trap rpm 7200@148, 31.5 diameter, 98.5" rollout, flash 6000
http://www.wallaceracing.com/mobile/converter-slip.php
Doug

 

[Mike Gaines]

In decent air; 4.30, trap rpm 7200@148, 31.5 diameter, 98.5" rollout, flash 6000
http://www.wallaceracing.com/mobile/converter-slip.php
Doug

Thanks

 

[Darter6]

I'm all for gearing vs changing to a powerglide. My 2 cents.

 

[Cranky]

I tried a power glide for 1 weekend and it was the biggest disappointment ever.
I thought my Torqueflite wouldn't handle 1180hp at the time.
Went out 1st time with the Torqueflite and ran 8.57@160.
But the 4th pass I smoked the clutches.
Pulled it out and wasted $5700.00 on a ATI Powerglide.
Went 9.11 next outing.
Only to find out that the Torqueflites Griner valvebody was defective.
Got it fixed and put the Torqueflite back in.
Ran 4 years without any problems.
Now new combo is 1275hp and going to try the Torqueflite still and see if it can handle it.
I did remove the low gear sets.
A& A low gear sets cant take 900 ft.lbs of torque

Hey Chris, what's the weak link in a Torqueflite? I keep hearing that they can handle more than 1000 horses....