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Old 05-14-2006, 12:07 PM
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350 turbo vs 2 speed powerglide

I have a question I have a 2 speed power-glide,and a 350 turbo.The engine is a 412 cubic inch small block Chevy in a 77 camaro with 4:10 gear ratio.Which would work better the 350 or the power-glide?The car will be a street strip car. Thanks for looking

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Old 05-14-2006, 12:43 PM
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Depends ...

High gear ( final ) is the same 1 to 1 ...
PG is 1.78 in first ... then 1 to 1
Turbo 350 is 2.52 first ... then ... 1.52 then ... 1 to 1

The Turbo 350 will have more gear ratio in first ... but sometimes the PG works better ... less tire spin ... with the 1.78 gear
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Old 05-14-2006, 12:58 PM
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What Deuce ment to post is : the PG has 2 first gear ratios from the GM factory .

1.82 & 1.76


The 1.76 gear ratio is stronger of the 2 the PG was built with
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Old 05-14-2006, 01:26 PM
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Quote:
Originally Posted by Crosley
What Deuce ment to post is : the PG has 2 first gear ratios from the GM factory .

1.82 & 1.76
Had actually forgotten about the 1.82 ... as it is fairly uncommon ...
I have found the 1.76 to be a LOT more common ... and I (for one ) do not believe the .06 difference in the gear ratios can be told in a street/strip car.

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Old 05-14-2006, 04:47 PM
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Quote:
Originally Posted by Deuce
Had actually forgotten about the 1.82 ... as it is fairly uncommon ...
I have found the 1.76 to be a LOT more common ... and I (for one ) do not believe the .06 difference in the gear ratios can be told in a street/strip car.

Thanks so i would probably be better of with the 350 turbo
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Old 05-14-2006, 05:28 PM
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A PG takes less horsepower to turn ... so it is better in some ways ...
A Turbo 350 has a lower first gear ... so that can be a plus ...

Turbo 350 ... 2.52 X 4.10 rear axle= 10.332
Power Glide ... 1.78 X 4.10 rear axle = 7.298 ... so you would have to run a 5.80 gear in the rear with a PG to have the same overall first gear as a Turbo 350 with a 4.10

You be the JUDGE !!
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Old 05-14-2006, 08:50 PM
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Quote:
Originally Posted by Deuce
Had actually forgotten about the 1.82 ... as it is fairly uncommon ...
I have found the 1.76 to be a LOT more common ... and I (for one ) do not believe the .06 difference in the gear ratios can be told in a street/strip car.


the 1.82 carrier is a stamped steel unit, quite weak when compared to the 1.76.

Drive pinion gear on the direct drum is small in size.

1.76 carrier is much stronger
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Old 05-15-2006, 12:54 AM
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Why is a Powerglide often referred to as a two-speed Powerglide yet the TH350 is not referred to as a three-speed TH350 or the 700R4 isn't referred to as a four-speed 700R4? Is 2-speed Powerglide a product of the Department of Redundancy Department? Is there a Powerglide with more or less than two speeds?
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Old 05-15-2006, 07:33 AM
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onova...its the same as when people say ..." Ihave a chevy small block 400"


If its a street/strip car,Id use a T-350. P-glides are great, but for performance applications are usually better suited for lightweight/deep geared cars.
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Old 05-16-2006, 01:59 AM
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onova, wasnt there a unique 3-speed powerglide used in early corvettes? believe around '56.
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Old 05-16-2006, 08:31 PM
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Quote:
Originally Posted by Rocket455
onova, wasnt there a unique 3-speed powerglide used in early corvettes? believe around '56.
no. glides have been 2 speeds. 1956 would have been a cast iron glide.

Quote:
onova...its the same as when people say ..." Ihave a chevy small block 400"
this could come from the fact that GM sold a big block motor labeled a '400 cid' motor when it actually was a 402 cid engine. I've seen a few '400' big blocks in early 70's chevy trucks
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