gkull

How much HP could I free up pulling my TH400 and installing a Transbraked 4500 stall TH350?

66 nova with a 7500 rpm 355 ci sollid roller 2800 pound 11.70 bracket car

69 N.O.X. RATT

They are a little lighter (suck less power) If I had to guess how much et in the above set up, not much, maybe a tenth or two at most. Just a SWAG though.

The T brake has the potential of helping more than anything.

GrandSportC3

I agree with John.. .1 to .2 should be your approx. gain..

CFI-EFI

I would guess closer to the .2. Of course the TH350 doesn't weigh 100 to 200 pounds (100# is worth a 1/10) less than the TH400. The bigger difference is in the power they absorb. The TH400 has a rather heavy drum that has to slow, stop, and reverse directions at the 1-2 shift. At 7500 rpms, that takes a lot of energy. It can become a reliability problem, at those rpms also.

Either trans can have a trans brake and a 4500 rpm stall, So I don't understand the significance of "installing a Transbraked 4500 stall TH350?". In fact the same converter will work for either trans.

RACE ON!!!

gkull

I should have said that the existing 400 also has the 4500stall, trans brake, reverse pattern manual shift, and 8 inch TC

Ironcross

The 400 will take more abuse with all things equally between them. I`d prefer thje 400. But I also use high HP BB`s