My car has a T04R w/ 67mm inducer and 1.0 AR. It's got a large streetport.

It already put down 501whp @ 20 psi.

At what point will this turbo become inefficient ?

 

Run it up to 30psi see what happens. Depending on port work and such it will be good for just over 30psi.

~S~

 

Thanks Sean, so you would say this thing could possibly put down 600whp on this thing?

 

Yes, in theory it is capable and could put down over 600whp. if lag is not a issue being the drag guy you are step up to the 1.15. THough I would try the 1.0 first.

~S~

 

from what i have read, you can run a normally unheard-of amount of boost by using a lot of pre-turbo water injection. It takes the heat out of the compressor, putting the turbo back into its efficiency range.

apparently rc72r has made 30psi off a 35r this way...

you would have a street rocket with next to no lag.

i say go for it!

 

Thanks fellers.

 

Jrat did over 550whp on a T04R, undivided hotside and cast manifold