Thinking about going with a MPI setup using the stocker in a twin setup. My question is... Isn't backpressure still an issue when running through the stock turbo?

 

if nathan has set it up, you can be assured that all the homework is done and that they will work awesome as advertised...

 

I personally feel it should be externally wastegated. I can't imagine 550hp worth of exhaust flowing through a stock 9cm housing w/o extreme drive pressures. Lots of people on this forum disagree with that statement, though. I'd like to see what the pressures are before committing to that setup...

 

Is the stock wastegate even used?

 

It gets converted to a manual one.

 

Thanks! That helps a lot. Now it makes sense.

 

The stock turbo is still a limiting factor, even if the wastegate is manual it's still pretty small. The only problem you might have is when you decide it's "not enough on the top end". Talk to Nathan, but the impression I got was a stocker up top is harder/more expensive to upgrade than a s300 based turbo. I think it has to do with the plumbing.

Bottom line talk to Nathan and find out, he will tell you straight.