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mili727
09-07-2003, 12:08 PM
I was wondering :

How much boost can the stock turbo handle?

How much boost stock internals can handle?
Black Majik MSP
09-07-2003, 12:14 PM
If anyone knows of any Nissan forums, you could ask them about the turbo. The T25 is in the SR20DET as well, so I'm sure they would know.

As for the internals, I think Joe P might be the one to ask.
jred321
09-07-2003, 12:46 PM
how much boost or how much boost efficiently?
the internals are only as good as the tuning done to prevent detonation. i wouldn't feel safe over 250whp on these internals for every day driving, maybe for a dyno run or 2 but that's about it. as to how much "boost" that will depend on how much air you're flowing, so which turbo you have, varying atmospheric conditions, etc...
Kenetix
09-07-2003, 12:49 PM
The T25 is in the SR20DET as well, so I'm

People have some misconceptions about this turbo. It is NOT a T25. It is a GT25. The GT stand for Garrett Technology which they only place on products that incorporate a ball-bearing design. Normal T25's are much less effecient and do NOT incorporate the T04S compressor.
jred321
09-07-2003, 01:01 PM
Originally posted by Kenetix
People have some misconceptions about this turbo. It is NOT a T25. It is a GT25. The GT stand for Garrett Technology which they only place on products that incorporate a ball-bearing design. Normal T25's are much less effecient and do NOT incorporate the TD04 compressor.
but in newer sr20's, they do use a ball bearing t25. it isn't the exact same that is in our car (there are many things that can be different in any turbo), but there are plenty of sr20 powered cars w/ ball bearing t25's. i have yet to see a compressor map for our turbo, so i would say your best bet would be to find a compressor map for a nissan ball bearing t25.
Kenetix
09-07-2003, 01:15 PM
There are 4 types of the GT25, 2 of which use the T04S compressor, ours is one. Not to sure on the compressor for the T25 in the SR20DET.
Kenetix
09-07-2003, 01:23 PM
Okay, the T25 in the SR20 is a ball-bearing but not the GT type. The T25 in the SR20 uses the older style with a ball-bearing on the turbine side and NOT on the compressor side. Ours uses it on both compressor and turbine.
jred321
09-07-2003, 01:31 PM
edit: never mind, i found out the s15 has a t28.
Kenetix
09-07-2003, 01:36 PM
T28 flows about 3 more pounds than ours. 31 for the T28 vs 28 for ours.
boostisgood
09-07-2003, 01:44 PM
The GT-25 is efficient up towards 14-15 LBS, after that, the efficiency drops off, due to the excessive heat it generates, and inability to move more air.
boostisgood
09-07-2003, 01:47 PM
STcok internals, If you tune it right, you can pump just about 15-16 lbs on the dyno, or track, but about 12 lbs daily.
mili727
09-07-2003, 01:56 PM
Thx Boostisgood.
jred321
09-07-2003, 02:02 PM
does anyone have a compressor map for our turbo?
boostisgood
09-07-2003, 02:03 PM
Jred321, Ill try to find it tonight, I think I got it on my puter, but ITS SUNDAY FOOTBALL. :D
jred321
09-07-2003, 02:05 PM
Originally posted by boostisgood
Jred321, Ill try to find it tonight, I think I got it on my puter, but ITS SUNDAY FOOTBALL. :D
haha, ok no rush, just wondering :)
TitaniumSpeed
09-07-2003, 02:12 PM
I would also like a copy of that map if its no trouble :D
boostisgood
09-07-2003, 02:24 PM
go here to see the mapping.

http://www.egarrett.com/products/gt_15_25.jsp

Here is what Garrett says about the Turbo.

The GT 25, at the high end of the range, can be configured to match gasoline engine ratings up to 210 hp.
DiscreetSpeed
09-07-2003, 05:09 PM
read my sig.....loving it, just gives it a zoom zoom feeling lol