I was talking with a mechanic I know and he kept saying that he has a friend with a stock 1999 Ford Powerstroke diesel turbo on his FC. I looked it up and the turbo is a Garrett with a 1.10 A/R compressor and a .84 A/R hot side. I'm not sure as to what that means , but from what I gather, that’s too big for the 13B to efficiently spool.

This is a load of BS right?

 

in stock form that would be laggy, but with a good port job it should spool just fine. I have an AiResearch TO4B with a 1.15 a/r divided turbine and a V-trim compressor that came off of some diesel motor. I plan on running this (when I can afford the build) with little worry of laggy spool. I intend on either doing a large street port or maybe a bridgeport (haven't decided yet) and using a long runner fully divided manifold.

 

oh, wait i just read your post wrong. that powerstroke has a big *** compressor and a small hotside. Wierd, diesels usually have large hotsides due to the amounts of air that they pump out. I would think that a .84 a/r hotside would choke all but a small 4-cyl. diesel.

 

i took a look at the new powerstroke twin turbo setup at a shop the other day.. very interesting i might say! two turbos sitting perpendicular - not parrellel - to eachother on top of the block. the primary having a large hotside with a small compressor and the secondary being just the opposite. soooo here's where it gets interesting:

the cold side of the primary feeds the hotside of the secondary for stupid fast spool up, and its only the secondary that pushes boost into the engine.

i've been thinking about trying this for a long while now, and now i see it in production... for once i had a good idea and someone else thought of it first

 

My friend let me install that exact turbo, it spools fine, but the compressor is a .80 something and the exhaust is the 1.10.

He spools it to 10psi @4K

And if you think that is big, I have a GT42 with a 1.35A/R Exhaust and it spools 14psi @ 4.5K

 

Sounds good… Rx7_Nut13B what kind of hp #’s are you and your buddy putting out?

I have to say 4K is a little longer then I want to wait for boost. At the same time, I see guys running the stock twins @18psi pumping hot air into their motors, and I don’t like that idea. I’m looking for a setup that gives me good volume at a lower pressure. I’m aiming at 400WHP with boost (12-14psi) arriving at 3 to 3.5K.

Anyone have any budget ideas?

 

GT35, BEST TURBO FOR THAT SETUP

Spools fast, good for easy 400hp, and is pretty cheap

 

Where does the boost from the primary go after it spins the secondary? does it dump into the exhaust?

I would think that you could use the primary turbos charge in the intake for additional volume and some additional pressure.

 

COOL!

 

Also I am fairly sure the Powerstroke uses a VVGT and from what I have read they don't work too well with High EGTs, not saying it won't work, but becareful if you choose this particular one.

 

 

I think thats the turbo I got on my car, I think its the 98-03 7.3l turbo, its a garrett with a 1.0A/R compressor and a smaller than that hotside.

LOL, and look who posted^ diesel turbos don't work on rotaries do they chuck

 

that turbo looks insane.... but im still stickin the my 35r plans.

 

holset for the win
hx35.