So a fella out in CA rolled 618hp/900+TQ using a built 68mm Pmax and 175/?? injectors. Not bad considering to get to 600+ in the past required 190 injectors or bigger. He modded/ported his intake manifold, has some supporting mods as well. I'll try and get the full details posted here.

 

That's wild, post the details

 

618/978 on 175/75s fed by a 68mm Pmax using a larger turbine wheel.

 

I have the RCD powermax and was debating 175's or 190's

 

It might work but will have some smoke on the 190's. The turbine needs to be bigger.

 

What do u think of Warren diesels injectors

 

If you don't mind buying modded cores sure they work. If you want a reliable you got to buy OEM injectors NIB that have been modded. For the costs I would stay with a smaller turbo and get a ported manifold. It's easier to go bigger on the turbo and injectors when you want.

The motor is a big air pump. Air has to get in and out. Make that path flow easier with more volume and you don't "need" a huge turbo and injectors to make a ton of power.

 

Can't u just port out the factory intake urself , isn't that all the aftermarket ones are if so how far out do I go , kinda curious what kinda HP's I'd make with the 190's though

 

If you got the skills you can do the porting. For 190's and a 68 Pmax you should be close to 600.

 

How much do u take out on the intake