GT28RS for redtop.. What do I need? oil/coolant line/restrictor/ dump/downpipe?

[mackdaddy240]

My T25 is smokein at idle all the time now so its time to change. I'm going to pick up a gt28rs cheap knock off turbo.. please dont hate I just need it to last 1 more year till I graduate. My question is they're selling cheapos on ebay with a header. I have a T25 dump to 3" downpipe. I cant find a turbo outlet for the gt28rs ANYWHERE, will the t25 dumppipe bolt to the gt28rs? if not where the hell do you get one? Also I am going to need to run oil and coolant lines. I heard you can bend the factory coolant line, is that correct? and the oil line has to have a restrictor, what type and where from? anybody whos done this PLEASE let me know. ThanksI'll settle for t3 t4 if its a lot easier and cheaper if anybody has info on that.

[nonvtecaccord]

i know a "real" GT28RS is a direct bolt on, a knock off might be different. I've never heard of anyone needing a restrictor on a GT28. are you going to have the engine tuned for that turbo?

[dustyk]

a GT28RS is a near perfect bolt-on. As far as I know, there are two things that you have to modify in order for it to fit. First thing you have to modify is the flange for the oil return on the turbo. The bolt holes on the stock T25 do not line up with the bolt holes on the GT series turbos. In order to make it fit, you just need to widen the holes with a metal file until it fits. If you dont want to file, they do sell oil return flanges for the GT series turbos. The other thing is that one of the holes on the outlet pipe do not line up as well. One of the corner holes on the outlet also has to be expanded in order for it to fit. Ive noticed that most of the aftermarket stainless outlet pipes already have this done when you get them. This was even true of the Megan outlets and the cheapo SSautochrome outlets on ebay.

[DawgMode]

wassup, a friend did this upgrade just a few weeks ago.....as for ya questions:

a)yea tha dump u have will fit

b)as for tha turbo...cheapturbos has em and enjuku c)as for oil and coolant lines SAVE yourself tha hassle and just get tha taka lines..there is a couple kits right on ebay now and NO u DONT need a restrictor

[mackdaddy240]

Most guys are saying I need a restricor and it is a .03 somthing....... I heard the ball bearings need less oil pressure. You sure you dont need a oil restrictor..

[driftin_sr20det]

If you get one that is ball-bearing than YES you will need a restrictor, along with a stainless steel line. I run this one on my GT28RS, they also have other install parts. They do blow seal if not used, especially the exhaust one.

http://www.atpturbo.com/Mercha...=GTBB

[virus77]

if you are running aftermarket lines you need a restrictor (not from my experiance, from what I have seen around), if you are running stock hard lines you dont need a restrictor.(ive been running mine for 25k miles so it must be working right )

[mackdaddy240]

It comes with a oil feed line, but if I have to get a restrictor to use it I might as well bend the stock ones, but if I remember right the s13 redtop t25 has a banjo bolt with a huge hole, I heard that I have to get a banjo bolt that restricts to .06? and then I dont really need a restrictor because the banjo bolt is doing it.........

[mackdaddy240]

oh and the turbo I'm getting the gt28rs is ball bearing, I'm pretty sure all the GT series are..?

[C - ROD]

the "R" in gt28rs stands for ball bearing in the Garrett Turbos, but i dont know about the knockoffs

[mackdaddy240]

Well Its on and its working with stock lines, I looked in the oil feed and there is a restrictor in the oil feed on the turbo so I just used the stock lines and no restrictor since its restriced on the turbo. Well see what happens. Also the turbo has internal wastegate set at 12-16 psi, I have stock ecu 370cc injectors and a ka24e maf.... IS this safe????

[green91]

Considering i max out my stock SR MAF at around 12-13psi on stock t25, id have to say NO!

youre probably running lean under full boost.

[mackdaddy240]

yeah it was running lean, I tuned the prom, and now under 14 psi it is at the first green bar on my narrow band air fuel gauge, I dont really trust the crappy narrow band but its all I have for now. But I'm pretty sure its running rich because it doesnt have that much power. When I tried turning the fuel up on the t25 it ran even worse so its pretty much doing the same thing except it runs a little better than the t25 even when its to rich.

[nzmoman]

is this one of those ebay turbos? Or is it a reputable company? I am wondering if the SS autochrome turbos are any good...

[SR20Essex]

is this one of those ebay turbos? Or is it a reputable company? I am wondering if the SS autochrome turbos are any good...

I wouldnt trust header's from SS Autocrap, because Ive used some and they cracked pretty much right away. As far as turbo's I have no idea, but judging by the quality of their other stuff I would say save yourself from a headache and spend the extra money for a Garrett, HKS, or Turbonetics.

And please don't mess with bending hardines, as soon as you do they split and leak under heat. Just get some flexable aftermarket lines. It will also make the install 100% easier. (all expierence talking)

[nzmoman]

I second that...braided steel lines are a gift from heaven for the person changing turbos.

[BaliLover]

I wouldn't trust a knockoff turbo to last at all, and since the garret GT series cannot be rebuilt, I'd say its a safe assumption that this turbo shares nothing in common with the real GT28RS other than the name. I'd be surprised if it was even a true ball bearing setup. Its probably one of those poorly constructed T28s that someone has played with a bit and is now up on ebay as some big power turbo.

You'd probably be better off rebuilding your T25 and saving the rest of the money that you'll spend on a knock-off no quality turbo.

[mackdaddy240]

Yeah its all knock off stuff but so far its been good, I'm planing on rebuilding the T25 so if the cheap stuff goes I can put it back on. The header had a small hole when I got it, I welded it and its fine now. You get what you pay for but for the money its been worth it so far

[nzmoman]

has anybody had good experience rebuilding turbos? ... I have never tried cause every person I know and many of the shops in ATL suggest getting a new one because rebuilt turbos never last as long and are never the same...

[Shaefer Thomas]

Man, Im sick of people talking crap about ssautochrome. I just ordered a full engine back exhaust from them for my sr, and everything was beautiful. It was well constructed, great welds, nice finish, great fitment, and just all around great. All you people talk about buying name brand, when most of us dont have the money for that. Just remeber, a GOOD percentage of the time, you are paying for the NAME and the NAME ONLY! Ive heard that ssautochrome had complaints about their headers, and reworked their design. Mine is working flawlessly so far. It has thick metal, thick flanges, great welds with NO holes in sight. The only thing I heard is that if you dont secure the nuts all around the turbo and manifold, they could vibrate off, and many people have had this happen. All I have to say is, why spend 1000 dollars when you could spend 500 on the same thing without the name.

[mackdaddy240]

I agree SS isnt great but bang for buck I'd say they're excellent, my header hasnt cracked, nor has my dump pipe or 3" downpipe. My roomate has a RSX with a SSautochrome intercooler, header, downpipe, and t3/t4 turbo all from ss and all still working great so definately dont hate. although the JDM motors turbo gt28rs is top mount only, so if you get it and arent using topmount you have to loosen all the bolts and spin it around, also a few mods have to be made, oil return, turbo intake in and intake out neither match kind of a