Diveshaft queston.

[Chevy 350 Fan]

Ok I just got off the phone with AAmco and they said that the turbo 350 they built for me should handle 450hp as long as I use an aux cooler (already have) and a stall converter (I am planning on getting) probably 2300 rpm. As for the driveshaft his coment was that driveshaft is better than most stock ones today. Input???
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[MARKDTN]

Originally Posted by Chevy 350 Fan

Ok I just got off the phone with AAmco and they said that the turbo 350 they built for me should handle 450hp as long as I use an aux cooler (already have) and a stall converter (I am planning on getting) probably 2300 rpm. As for the driveshaft his coment was that driveshaft is better than most stock ones today. Input???
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I'd get that in writing.

[Keith Seymore]

Originally Posted by Chevy 350 Fan

As for the driveshaft his coment was that driveshaft is better than most stock ones today. Input???
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I have no idea why he would say that.

Back then it was a steel tube with a yoke stuck on each end.

These days they are a steel tube (usually) with a yoke stuck on each end.

There are some carbon fiber/aluminum composite/metal matrix shafts in use, which are lighter and still handle the load, for more premium applications.

I stand by my original comment (except I probably wouldn't go see the shop owner you just talked to).

Originally Posted by Keith Seymore

Is the original shaft one piece or two piece?

If it were me I'd ask a local drive shaft builder for his advice. He should be able to make you a nice new one piece to handle the power for about $300.

K

As an aside, my Chevelle is about 950HP and has gone 9.80's @ 3950 lbs. I ran the original shaft for many years and it was fine when I took it out to replace it with an aftermarket shaft. I have it stored as a backup in case anything ever happens to the new one.

K

[Chevy 350 Fan]

Thanks for the input guys! I'll pay a visit to a shop that handles driveshafts.
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[Taibo]

Originally Posted by Chevy 350 Fan

Thanks for the input guys! I'll pay a visit to a shop that handles driveshafts.
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Save your money. The stock shaft will take much more than 450 HP. I know because this engine, by spec not imagination is over 600 HP and 650 Ft-Lbs of torque and the stock shaft in my truck has lasted 15,000 miles with that beast trying to break it!

[RenoKeene]

I personally wouldn't run a TH350 behind that much motor, I'd find a TH400.
But that's just me.

[Taibo]

Originally Posted by RenoKeene

I personally wouldn't run a TH350 behind that much motor, I'd find a TH400.
But that's just me.

Couldn't agree more! TH400 is a much stronger trans.