[tuff82]

hey! i was wondering what would be better for drag racing, a th 350 or th 400
its gonna be behind a 454 with around 500 hp and 580 ft lbs of tourque

[motorhead454]

if it were me I would opt for the 400. Although you can build a strong 350, the 400 will give you the best protection in racing apps. just my 2 cents.

[stimpy]

we have been using a built th350 , the 400 steals power ( apx 15 hp ) and some of the cases are prone to cracking in the belhousing area , our trans has lasted 6 seasons in a 3200 pound camaro with 4:88's and a 750 hp motor .

[car601]

If you are looking for best et 3speed most likely will be best. Bracket racing glide all the way. One less shift one less chance for a mistake. I did break a case on a 350 in a mid 10 sec car.

[BOBCRMAN@aol.com]

It depends on your budget. A 350 turbo can be made to live, but is spendy!!

A 400 turbo can be made to live with little more than a good build, a shift kit and some heavy duty sprags..

Broken bellhousings are seldom the fault of the trans..

[Crosley]

use the t-400 with 34 element sprag for 2nd gear

IF you use the t-350 trans , you should use a 36 element sprag for 2nd gear.. That would be best for the power level you have and be dependable.

That t-350 drum is very custom built.. about 440.00 dollars

the power loss / use difference between the t-350 and t-400 is too much talk about nothing for what you are doing

[c65shoebox]

Invest the money now and go with a powerglide, if you plan on racing for a awhile you will be going this direction sometime, might as well invest the money once on a lighter, less horsepower robbing unit. The th400 is the cheapest to build, but if you use a th400 and you want to switch to a glide later, then the driveshaft will have to redone. Dimmensionally the glide and th350 are the same.

Go with the Glide, they are easier on parts, more consistent.

[68NovaSS]

Originally Posted by c65shoebox

The th400 is the cheapest to build,

Only because you need less parts for the strength. I had "bulletproof" a spragless 400 built, the cost was $3,600 with a Griner VB and brake. You can spend a pile on a glide as well to get to that level.

[c65shoebox]

Big difference between a top sportsman and an average bracket unit. You can do a lot with a glide and $1150.00. That will get you a unit reliable to go into the 9's and handle 950 horse.

[anglia427]

it really depends on the weight of the car,i run a glide but im putting out 650 hp.and my car is 2k lbs.if your over 2800lbs with 500 hp a turbo would be a better choice for you.as far as a 350 v/s a 400 with a big block go with the 400 as crosley said do the sprag .