I'm just abotu done and getting my car running. I have a pair of TO4B turbos. Here are there specs

Compressor: 54mm wheel, .60A/R

Turbine: P-trim wheel, 1.15A/R

I know the exhaust housing is huge but will I be able to get any boost at all with these? I know some of the supra guys, and there turbos barely spin at idle. Mine spins quite a bit faster. I also know a guy with a rotary running the exact same exhaust housing and turbine wheel. He reaches full boost of 28psi at about 5.5K. I know I'm comparing apples and oranges but if he can run that on a rotary, I'd like to think my V8 will have more than enough exhaust to push these turbos

Here are the specs onmy engine

Stock bottom end
Ported heads
Cam: 212/218 Duration @ .050, 488/495 Lift, 112 lsa

I only want to run 6psi on this engine. I do plan on changing the exhaust housings to something like .81A/R but I'm gonna wait to get the engine stroked at the same time.

Main question is if it'll at least build 6psi, and if so when in the rpm range

 

I looked up a compressor map those look about the right size.
2 T04B would push about 70 lb/m. For low boost they would be okbut if you wanted to run higher boost they would be a little miss matched.
I could figuer out how much your engine flows if you added some more details.
How many rpm's did you want to run?
What are you heads and intake like?

 

I have the compressor maps for those turbos here http://www.forcedinductions.com/to4bturbos.htm . As for running them on your car, you should be able to run them and reach 6psi. The boost will come in around 3500 or so, depending on which T04B compressor your running.

Jose

 

My heads are just a mild port, gasket matched and some bowl work. My intake manifold if that's what you're refering to is a stock LT1. I'm going to port it though when I stroke the motor

 

What do you mean by compressor? I thought all the info on the turbo was given in my first post. Am I missing something?

It is great news though that I'll get boost at 3500rpms

 

Sorry wasn't thinking to clear this morning, anyhow its the T04B S-3 compressor map.

Jose

 

With your 383 at 6500 with 80% VE that engine will eat about 40 lb/m of air.
Those turbos move about 70 lb/m but with a realy steep pressure ratio.
JZ 97 SS 1500 is right it will take a bit for them to spool.