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Registered:
June 2003
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t25/t28 turbocharger.
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Sun, 21 December 2003 12:52
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having to take the plunge, i have access to a M10 t25 turbo for $200nz, will this be somewhat suitible for a 3tgteu, in place of the ct20 with no fuel mapping changes?
what else will slap in there with no real fuel map changes?
as for oil lines, can i just cut them off at the flange and use radiator hose or something to make up the oil lines?
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I supported Toymods
Location:
Perth, Western Australia
Registered:
December 2002
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Re: t25/t28 turbocharger.
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Sun, 21 December 2003 13:17
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What are the A/R ratios on the comp and exhaust side?
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Registered:
June 2003
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Re: t25/t28 turbocharger.
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Sun, 21 December 2003 13:23
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the ct20 i have i dont know but its a Garrett/AirResearch M10 (replica t25)
AirResearch M10 is A/R .48
from what i can see its gonna be pretty close and the t25 will spool up much quicker, but i dont know?
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Registered:
June 2003
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Re: t25/t28 turbocharger.
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Sun, 21 December 2003 13:26
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qouted from google.
"My Air M10 off of a chrysler 2.2L is a .48 turbine housing,
.42 compressor housing with a .50 trim compressor."
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I supported Toymods
Location:
Perth, Western Australia
Registered:
December 2002
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Re: t25/t28 turbocharger.
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Sun, 21 December 2003 15:55
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I believe it will be too small for a 1.8L 3TGTE - it will run out of puff around 4500-5000rpm, go for a T28 which is the same size but larger A/R ratios.
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Registered:
June 2003
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Re: t25/t28 turbocharger.
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Sun, 21 December 2003 19:39
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getting hold of a t28 at any respectable pride is quite difficult ;(
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I supported Toymods
Location:
melbourne.victoria.austra...
Registered:
June 2002
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Re: t25/t28 turbocharger.
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Sun, 21 December 2003 21:10
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if memory serves the t25 was the stock turbo for the ca18det.
i think it may be a bit small for the 3TGTEU
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Registered:
June 2003
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Re: t25/t28 turbocharger.
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Sun, 21 December 2003 23:05
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this is what the dude said :
"high mount turbo setup on 4AGE.
I'm making 112kW at the wheels on 6lbs on stock ecu/inj.
It doesn't run out of puff on my motor running to about 7400rpm in 3rd gear (going by dyno run).
I have been using a screamer downpipe though which helps I guess.
I can't see any AR markings on the front cover.
The rear cover says M26, AR63."
So the exhuast housing is actaully A/R .63
basically what i wanna know is, if i bang this on my 3tgteu running stock boost, will i notice a increase or decrease in performance?
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Registered:
June 2002
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Re: t25/t28 turbocharger.
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Sun, 21 December 2003 23:13
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A T25 with a AR .63 turbine housing is prolly from a red top SR20DET (S13).
It will do the job on the 3T, still better than the CT20, but not a huge performance gain.
If you are in welly, go see Sheldon @ SR Autos in upper hutt, he's pretty cheap if you want to put a T3 comp cover on the T25 core.
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Registered:
June 2003
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Re: t25/t28 turbocharger.
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Sun, 21 December 2003 23:16
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shove a t28 compressor on it?
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Registered:
June 2002
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Re: t25/t28 turbocharger.
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Mon, 22 December 2003 01:17
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A T28 compressor is essentially a T3 cover,
It will need the inside machined to fit the comp wheel, while it is all apart you may as well get a T3 super 60 comp wheel put in, then it will be worth while putting on the 3T.
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I supported Toymods
Location:
Perth, Western Australia
Registered:
December 2002
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Re: t25/t28 turbocharger.
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Mon, 22 December 2003 01:45
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If it has a .63 A/R for the turbine snail, I'd say it's actually a T28, not a T25. While dyno runs are done in a 1:1 gearing, which will effectively drop the rev range of the turbo that he spoke about, and if it is off a S13 Silvia it will be a T28 spec turbo. Modifying the comp wheel is an extra expense I thought you were trying to avoid at the moment, and probably wisely so, as the conversion into your 3TGTE will cost you money over the turbo's initial purchase. I regularly spending around $200 alone in plumbing just to and from the turbo for both the oil and water when doing this type of conversion.
My turbo is off a S13/14 Silvia, and is a brass bearing T28.
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Location:
Canberra
Registered:
May 2002
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Re: t25/t28 turbocharger.
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Mon, 22 December 2003 01:55
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My turbo is off a S13/14 Silvia, and is a brass bearing T28
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CLG: Aren't the S13 & S14 turbos quite different to each other? My early model S14 (1995) T28 is quite different to all of the S13 ones I have seen so far.
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: t25/t28 turbocharger.
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Mon, 22 December 2003 03:50
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Red top S13 SR20DET's use T25G turbos, blacktop (late model 180SX's and S14's) use a plain bearing T28 and S14A's and S15's use ball-bearing T28's 
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I supported Toymods
Location:
Perth, Western Australia
Registered:
December 2002
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Re: t25/t28 turbocharger.
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Mon, 22 December 2003 07:48
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The only differences I'm aware in the T28 range from Nissan are the comp wheel covers and the bearing type, as a quick and easy way to determine origin. The earlier models have a slip over inlet, where the inlet pipe is secured by a hose clamp, while the later model items have a two bolt flanged setup as does mine. I must admit I'm not particularly interested in where a turbo comes from originally, but more if they are ball versus brass bearing and ease of fitment, so haven't paid much attention to Garrett turbo history, JCMF is the guy to ask on this subject!
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Registered:
June 2003
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Re: t25/t28 turbocharger.
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Mon, 22 December 2003 10:14
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the other question i had is how do i make up new lines, i was thinking for the return line, just cut the flange with 5cm or pipe on it off and cut the flange off the t25 line and put some hydralic or similer hose in between with 2-3 hose clamps on each side? will that work?
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Location:
Canberra
Registered:
May 2002
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Re: t25/t28 turbocharger.
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Mon, 22 December 2003 12:25
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Red top S13 SR20DET's use T25G turbos, blacktop (late model 180SX's and S14's) use a plain bearing T28 and S14A's and S15's use ball-bearing T28's
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Agreed.
And the ball bearing T28's can be identified by 6 bolts holding the exhaust housing to the core, whereas the conventional bearing ones only have 4 
Phil
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: t25/t28 turbocharger.
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Mon, 22 December 2003 13:12
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| CLG wrote on Mon, 22 December 2003 15:48 |
JCMF is the guy to ask on this subject!
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Thats me, sponge for information even if it's of no use to me
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