Turbo Choice

[elcoy]

I have a buddy who wants to sell me his t25 turbo, it seems to be that most guys use t3/t4 hybrids or something similar.  I was just wondering if the t25 could work, he had planned on using it on his 240sx i believe.  Its been freshly rebuilt and if the price is right it might be just the spark I need to start accumulating turbo build parts, assuming it would work.

[wazzu70]

Depends on what turbo it is, there are a lot of turbos that use a T25 housing. Chris (e30guydownunder) is planning on using a smaller T25 based turbo on his so you can see how that goes.

Honestly I would only go with one of the larger T25 frame turbos, GT2860R or similar.

If it an actual GT25 series...and not just a t25 flanged turbo, its probably too small in my opinion.

[e30guydownunder]

I'm using a GT2560. It should get me to just shy of 200kW based on what people are achieving with these on CA18's.

I wouldn't bother with a cheap silvia (240sx) turbo unless it was off an S15. The earlier turbos are on a bush bearing and getting a bit small. I would personally go for a GT2860 or 71 if I had my time again, but I'm going with what I got and we'll see how it all ends up on the other side

[JulianS]

I have a gt25 from a nissan s13, it worked great with low cr pistons at 23psi but with oem pistons, 10:1 cr the turbo gets too hot even at low boost pressure and "non-aggressive" driving... I have blew the oil seals after a very short time... So i would recommend that you use perhaps a gt2860 as mentioned above

[e30guydownunder]

I'll be running E85...should keep things a bit cooler

[pdxmotorhead]

When you blew the seals did it have the oil volume restricter installed?

Most turbos are being damaged from too much oil if my small sample is any indicator..

I've looked at like 3 in the last month that all had coked housings, and #4 lines running to them..

Just wondering, this aint my specialty...

Dave