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Old 02-15-2017, 05:25 PM   #1
Marty Hignight
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Default Powerglide first gear

So I am thinking of getting a powerglide for my car, it weighs 3024 with me, I run super street, only have about 500 hp in a small block. what first gear would be best?, it has 4:56 rear gears
Thanks in advance
Marty
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Old 02-15-2017, 07:27 PM   #2
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Default Re: Powerglide first gear

198 ATI super set
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Old 02-16-2017, 12:17 PM   #3
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Default Re: Powerglide first gear

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Originally Posted by Marty Hignight View Post
So I am thinking of getting a powerglide for my car, it weighs 3024 with me, I run super street, only have about 500 hp in a small block. what first gear would be best?, it has 4:56 rear gears
Thanks in advance
Marty
What transmission are you currently running? What ET and MPH?
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Old 02-16-2017, 12:49 PM   #4
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Default Re: Powerglide first gear

I'd agree with the 1.98's but you need to know your torque readings or have a good idea that you can stand that kind of drop when you go into 2nd. Be prepared for the car to slow down if you had a good 3 speed before.
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Old 02-16-2017, 03:30 PM   #5
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Default Re: Powerglide first gear

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I'd agree with the 1.98's but you need to know your torque readings or have a good idea that you can stand that kind of drop when you go into 2nd. Be prepared for the car to slow down if you had a good 3 speed before.
Yeah, I can't imagine a 3000+ pound car with 500 hp is very far below the index as it is.

With a 1.98 first gear and 4.56 in the back, it will work the same on the starting line as it would with a standard 1.76 first gear and 5.13 in the rear. The 1.76 combination would recover better on the shift also.

I doubt a 500 hp motor will like a lot of RPM, but there are a lot of variables.
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Old 02-16-2017, 06:57 PM   #6
Marty Hignight
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Default Re: Powerglide first gear

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Originally Posted by Lenny5160 View Post
What transmission are you currently running? What ET and MPH?
Right now a c4- only have 1/8 mile data right now last weekend flat out was 6:58 @ 103 mph. Going to test 1/4 mile this weekend.

Thanks for the info
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Old 02-18-2017, 05:41 AM   #7
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Default Re: Powerglide first gear

Your going to slow down your C-4 is plenty good for your weight and power.
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Old 02-18-2017, 07:30 PM   #8
Dick Butler
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Default Re: Powerglide first gear

More gears better in that weight range but probably regardless if set up.
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Old 02-20-2017, 11:34 AM   #9
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Default Re: Powerglide first gear

I'd stay with the C4 with the power level you have , No problem hitting the .500 tree with that combo.
I have several Super Street customers who run 3 speed transmissions because their car is a heavy weight .
If it was my car ,I'd keep the C4.
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Old 02-20-2017, 11:50 AM   #10
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Default Re: Powerglide first gear

My Super Street car weighs 3575# and runs a 1.80 glide with 4.30 rear gears. I have more power but because of the weight I am only a little quicker on ET. Runs right around 10.30 wide open and goes 10.90 at about 127.

With a Pro Tree transbrake I am leaving at 3800 RPM with .050-.060 in the box, so no problem cutting a light.
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