Torque Converter Question

[Zone_4_Lanlord]

I just purchased a 425 hp 383 engine, and a 400 turbo transmission. I plan on using a 12 bolt rear with a 373 gear ratio, but my question is, what size torque converter would be the best for my setup? I was thinking maybe a 3000 stall. The car is a 1982 Bonneville. It will be a daily driver that might see some track time every now and then.

Camshaft Specs:

Hydraulic Flat Tappet
Duration @ .050'' Lift: 229 Intake / 230 Exhaust
Lift: .480'' Intake / .486'' Exhaust

 

[Minion1186]

425 Hp/with 3.73s and a 3000 stall converter is not ideal for a daily you know.I actually am running a 402 hp 355 olds with a th350,2.56 gears and a 3000 stall converter,the engine,transmission and converter were in an 86 cutlass drag car and it ran 12.50's and capable of better times.I would say with my knowledge of it,i would go with a 3000 stall,seemed to have worked perfect with the combo in the drag car,i also will be driving my cutlass in th spring for a week straight,but with such a radical engine,3000 stall and 11:77.1 compression requiring 110 super unleaded and 93 octane i won't use it for work as much as play 8)

 

[Zone_4_Lanlord]

425 Hp/with 3.73s and a 3000 stall converter is not ideal for a daily you know.I actually am running a 402 hp 355 olds with a th350,2.56 gears and a 3000 stall converter,the engine,transmission and converter were in an 86 cutlass drag car and it ran 12.50's and capable of better times.I would say with my knowledge of it,i would go with a 3000 stall,seemed to have worked perfect with the combo in the drag car,i also will be driving my cutlass in th spring for a week straight,but with such a radical engine,3000 stall and 11:77.1 compression requiring 110 super unleaded and 93 octane i won't use it for work as much as play 8)[/quo


the car has 3.08 gears in it now. What if i use a 2500 stall with the 3.08s?

 

[MrHarley123]

You need to figure out what camshaft you have. Stall speed is based on the operating range of the cam not the rear gear ratio alone. If your cam's operating range is 1500 to 5500 rpm you could use a stock to 2200 stall. Stock convertors usually stall around 1500 to 1800 rpm.

 

[shotgun]

I will add to what Mr Harley123 said.

Weight will change stall abit also, a heavy car with a "2500 stall" might flash to 3000 where a light car may only go to 2500.

Gears do the same, a "2500 stall" may go to 2700+ with 3.08 since there is more load on it. Same convertor with 3.73/4.10 may not even reach 2500.

No good recommendation can be made without more info.