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Old 05-14-2008, 01:14 PM   #1
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Default Need advice for a turbo buy.

I have a spot for a T28 coming off from a skyline GTR (supposely) RB25

turbine .48 ceramic
ar.42

Rebuilt and is good for a 3 month warranty

The guy ask 360$

Should I jump on this?

Here's pictures:



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Old 05-14-2008, 01:19 PM   #2
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Often, the people selling these turbos mistake the t25 for a t28. Get the part number off the center section and I'll let you know
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Old 05-14-2008, 01:22 PM   #3
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considering the backing plate and compressor housing, id say it is a t28.


I'm surprised the turbine A/R is so low. considering it's a T2X housing, it's going to spool VERY fast and choke up VERY fast.
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Old 05-14-2008, 01:26 PM   #4
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Missed the backing plates.. good call.
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Old 05-14-2008, 01:30 PM   #5
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For a 150-200 whp will it be a good call or I should go bigger?
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Old 05-14-2008, 01:45 PM   #6
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GT-R or RB25?
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Old 05-14-2008, 01:51 PM   #7
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I just checked his post and it's said RB33
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Old 05-14-2008, 03:47 PM   #8
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So, how low will it choke? I pass over it or it is good for my 150-200 whp goal?
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Old 05-14-2008, 03:55 PM   #9
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GT-R's didnt come with an RB25 I dont think.

IMHO even being rebuilt it's way the hell overpriced like....seriously.
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Old 05-14-2008, 03:59 PM   #10
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r33 GTR skylines have a rb25 or rb26 depending on year
r32 GTR RB25
r34 have a RB26
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Old 05-14-2008, 04:06 PM   #11
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Quote:
Originally Posted by SloS13 View Post
GT-R's didnt come with an RB25 I dont think.

IMHO even being rebuilt it's way the hell overpriced like....seriously.
QFT

it's a bit on the high side, see if you can reason with the guy and offer him an accaptable ammount.

No expert here, but I think that turbo shold be just fine for 200 whp, and it will get you there quickly.
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Old 05-14-2008, 04:07 PM   #12
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It was at 400 and his last price is 360... I don't think he will go down more.
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Old 05-14-2008, 04:34 PM   #13
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The stock R33 turbo is 50 trim T3 with .42 a/r compressor and a 62 trim T25 with .48 a/r turbine. Sounds like it's a T28.

It'll be very efficient at 200whp. I'd say it's a perfect match for a 10-12psi/200-220whp goal... with the right DP and exhaust.

The good thing about the wastegate is that it bolts to the back of the compressor housing... meaning you can simply drill/tap new holes when you clock it. Also, don't forget you're going to need the 2 ATP adapters for the compressor housing... about $100 for both of those.
The studs I see are going to be too long for a Begi manifold... don't know about an FM manifold.

Food for thought. He's about $200 over the price of an equally capable T25 from an SR20det. If the fact that it's "rebuilt" and has a warranty brings you $200 worth of piece of mind, then go for it. You can find SR20det T25's in need of rebuilding for well under $100, and the GPOPSHOP rebuild kit is only $80. You get what you pay for... in this case, you're essentially getting a new turbo for half of a new turbo price. You could however do it yourself for half again as much. Your choice.

And you'll need the adapters either way... making it a $460+ piece of gear. For that money, I'd keep my eye out for a used GT2554r... they pop up in the Protege classifieds all the time.
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Old 05-14-2008, 04:45 PM   #14
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drill holes? you mean use this:



you can get it into almost any position you need.
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Old 05-14-2008, 04:49 PM   #15
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Quote:
Originally Posted by Dark Wanderer View Post
It was at 400 and his last price is 360... I don't think he will go down more.
Then **** him.

I got my fresh rebuilt and never used T25 for 175 shipped.
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Old 05-14-2008, 05:01 PM   #16
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T28s sell on ebay for 400... t25s you can get needing a build for 50 bucks or used for a little more. For your goals.. t25.
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Old 05-14-2008, 05:49 PM   #17
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That turbo probably came off a Skyline GT-ST Type M (or something like that), a RWD Skyline. I have a friend that used to run one on his RB20 S13 240sx until he blew it up (coupler had a leak, over spun it smoking a WRX). The RB20 is a 6-cyl 2.0 liter, revs to 8300, just FYI. It made full boost around 3500rpm and only seemed to struggle a little up top (7K rpms+).

Anyways, if you decide not to go with it, could you PM me the seller's info? That would bolt right up to my friend's RB20 and he might be interesteed.
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Old 05-14-2008, 11:28 PM   #18
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R32''s had rb26''s(in GTR form), RB25's came in some gt-s' and rb20s DO NOT rev to 8300, not stock atleast, those engines are junk.
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Old 05-15-2008, 04:34 AM   #19
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Quote:
Originally Posted by samnavy View Post
The stock R33 turbo is 50 trim T3 with .42 a/r compressor and a 62 trim T25 with .48 a/r turbine. Sounds like it's a T28.

It'll be very efficient at 200whp. I'd say it's a perfect match for a 10-12psi/200-220whp goal... with the right DP and exhaust.

The good thing about the wastegate is that it bolts to the back of the compressor housing... meaning you can simply drill/tap new holes when you clock it. Also, don't forget you're going to need the 2 ATP adapters for the compressor housing... about $100 for both of those.
The studs I see are going to be too long for a Begi manifold... don't know about an FM manifold.

Food for thought. He's about $200 over the price of an equally capable T25 from an SR20det. If the fact that it's "rebuilt" and has a warranty brings you $200 worth of piece of mind, then go for it. You can find SR20det T25's in need of rebuilding for well under $100, and the GPOPSHOP rebuild kit is only $80. You get what you pay for... in this case, you're essentially getting a new turbo for half of a new turbo price. You could however do it yourself for half again as much. Your choice.

And you'll need the adapters either way... making it a $460+ piece of gear. For that money, I'd keep my eye out for a used GT2554r... they pop up in the Protege classifieds all the time.
For the rebuilt, it was made by a shop so I think it is balanced and all the thing that just a rebuild kit doesn't do.

As for the adapter, I'll do all myself we have a plasma cutter coupled with CPU so the flange won't be a problem and I'll do my own DP and manifold.

But I'll take in consideration that it's on the High side and I'll wait for a better deal. Anyway I'm not in a hurry I'll have to source a 1.8 diff swap kit in first. It's just that I'd like to have a turbo soon than later because I could fab my manifold and DP right now. What forum do you talk for the mazdaspeed protege turbo?

Oh! And thanks again for all your good answer guys!
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Old 05-15-2008, 10:18 AM   #20
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Quote:
Originally Posted by disturbedfan121 View Post
r33 GTR skylines have a rb25 or rb26 depending on year
r32 GTR RB25
r34 have a RB26
all GT-R's came with the RB26DETT, while the R32 GTS came with the RB20DET and the R33/R34 GTS came with the RB25DET
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