If you mean a VNT25 from a 2.2L Shelby, it's too small for a 300SD.

No, I don't. I mean a VNT-25 from a European Opel 3.0L TD. I'm quite sure it's not at all too small, at least it's bigger than yours. :D

Andrew

I've got a nice little GT2256V for you if you want to trade. I'll pay the shipping for both. ;)

Thanks for the offer, but I'll stick with what I've got. It took me forever to get it. It's a brand new one from Germany. :D

So what's the max pre-turbine EGT?

Andrew

1250*f constant, 1400* for short bursts.

Have you guys done any modification to the fuel pump? Because as far as I know a 603 turbo engine's stock IP is good up to 180hp. Do you really need a larger turbo?

I wouldn't mind a working vnt turbo though, so I can still have the same peak hp (as much as the stock ip allows) but with extra torque down low.

whoa!
 

That sure is some nice little setups! I wouldnt mind the air to air setup myself with some water squirt nozzles in the front for hot days.. :D

Oh the days of my old 94' twin turbo supra.......:rolleyes:


Well grand national, neon srt-4, and turbo supras come to mind when looking for intercoolers.. What do you guys think?

It's a tight fit for any air/air up there...if you want to keep the AC. The non-crossflow engine is also not conducive to an air/air setup IMO.

The Saab 9000 intercooler with some custom endcaps should sneak right in along with a slimline fan and still let the hood close. Also, as far as space goes, you either need to fit the air to air intercooler, or the extra radiator for the air to water setup. Seems like a wash to me.

Andrew

The trick with an air/air is routing the 3 inch tubing back across the front of the car to the intake. It's much easier to route 3/4" coolant hose. The air/water also should give less lag because there is only about 6” of tubing needed.

3" tubing is overkill for 120hp. But if you can fit it, it won't hurt beyond a little lag.

2.5" is about optimum between flow capacity, space occupation and turbo lag. Especially with the stock intake, it will restrict it back down to 2.5" anyways.

I'm using 2" tubing for my air/air system. However, it will cause the turbo to surge at low RPM's from it's lower flow capacity.

So it didn't surge before the intercooler?

When I had a direct connection to the intake? No, it didn't.

Interesting! Good to know...

In my upgrade to 2.5" tubes I will need:
75* angle tube- 1
45* angle tube- 1
90* angle tubes- 4

Total length from the turbo outlet to the intake mouth will be about 3.5 feet (Not counting the intercooler).