I know turbos pretty well. I had an s2000 that I had built with two different turbo kits. Ran 666 hp on 110 oct.

Now adays with the newer turbos and the new billet wheels you can run a larger turbo with similar lag to a smaller turbo.

 

Yeah, the technology has advanced quite a bit since the "good ol' days".

 

Here is a good boost read from Marty (Formerly of KRC performance). He had a setup for 4 PSI of boost on a BONE STOCK setup (Stock kegger).
http://www.bionicdodge.com/bionic/in...p?topic=9467.0
RWHP: 308
RWTQ: 354

10 PSI: Holy CRAP!!!! look at those numbers.
RWHP: 413
RWTQ: 504

No intercooler, 110* inlet temp

This was on a rear mount turbo. 2500 for the setup, 60lb FMS injectors, t-76mm, dual 38mm wastegates, crank pulley and shorty headers TUNED BY SCT. So he did not use megasquirt.

That is a pretty flat torque curve for 4 lbs. I would be plenty happy with that cruising at 65 MPH.

 

Gotta do stuff to the motor to tolerate 10 pounds of boost though, else, it won't live long.

 

But 4PSI!!! You figure if you are going to spend 2500, you can get heads/cam/tune. OR you can spend about 3K and get 4PSI. It would be pretty hard to get 308 RWHP from heads/cam/tune on our trucks as easy as 4 PSI of boost.

10 PSI, I would be getting head studs and a one piece intake. The bottom end can handle it if you don't race it.

However, with 10PSI, you will need a Mega Viper.

 

I thought that lag was a testament to not matching the turbo to your application?

 

That is part of it. But no matter what you do a larger turbo is going to have more lag than a smaller turbo no matter what your application is. The new billet wheels helps a lot with lag on the larger turbos.

 

Methinks that dyno is a bit optimistic. Although that turbo is pretty large for a stock 5.9, so yeah it'll make nice power at low boost but I think the boost threshold would be relatively high as well, I like getting into boost below 2k.

Headgaskets/bolts, that's about it.

 

im looking to turbo my 1999 5.2 sport i want to run a remote mounted gt35 with inter cooler what do you recommend

 

I ran a remote for over 1.5 years, it does work. However I got tired of worrying about oil pump failure and moved to a front mount. I had a "cheap" pump die at 7k and replaced it with a $350 purpose built pump that lasted 29k till I switched. The pump probably would have been fine for a while longer but I hate worrying on long trips, it's not an off the shelf item and it's expensive.

Anyways, not familiar with Garrett part numbers and such but I'd suggest something with a 60-67mm compressor and a T4 P-trim turbine.

I never ran an intercooler on my setup (8PSI) and still don't. My temps were pretty reasonable, however with the front mount I will be installing mater/meth injection next week.