View Full Version : gt 28 fitment
guys got a mint looking gt28 turbo, but its the wrong way round to fit the 5, is this right or am i being my usual dense self?
its this exact one
http://i190.photobucket.com/albums/z51/Rossyboy99/gt28.jpg
Andrew Cooke
08-11-2008, 17:17
you just need to swing the housings around.
BUT...
those ebay specials aren't what you think they are, they aren't garrett, and the wheels are all sorts of sizes. So, although it says GT28 on the tin, that isn't what's in the tin.
i'll have another look tommorrow but sure mine had garrett written on it, is that possible or me hoping if its a garrett one is it better?
what are these things worth and when you say swing housings around is that easy? i mean a diy job for a donut
Andrew Cooke
08-11-2008, 17:53
i'll have another look tommorrow but sure mine had garrett written on it, is that possible or me hoping if its a garrett one is it better?
what are these things worth and when you say swing housings around is that easy? i mean a diy job for a donut
T2, T25, T3, T4, GT28, GT30, GT42, T67 etc are all Garrett turbos or should be, there are dodgy copies all over the internet that use the same names, but not the same parts, these are invariably junk. There are other excellent manufacturers of turbos Holset, Mitsubishi, etc, they all put their names on their products. I can't speak for all Ebay turbos, just the one's I've seen. They didn't measure up to be anything like the specification they claimed to be, they were unreliable junk. What are they worth? I wouldn't give you anything for one.
Rotating the housings is just a case of slackening the bolts around the perimeter of the housings and rotating them to where you want them. Just remember that the oil goes in the top and comes out the bottom...
the picture you posted is definately a chinese one.
I converted my GT2554R to a GT28r on Friday then had a job and a half trying to make up a decent actuator bracket. I had to splice two T3 brackets together and weld them up, it looked o.e once i'd finished though.
If it's a Garrett unit it'll have Garrett stamped in big letters on the compressor housing along with a tag on the core stating the part number.
If you haven't got an oil drain, you'll need to get hold of one, as the GT cores run a smaller type.
sparkie i used the xpower picture as an example thats not my one, i'll have a butchers tommmorrow if its got garrett on it is it a good version?
Andrew Cooke
09-11-2008, 00:52
if it's garrett you might want to see which version it is, or whether it's got a non-standard exhaust housing.
GT28
GT2854R - 471171-9 (http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT28/GT2854R_471171_9.htm)
GT2860R - 707160-5 (http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT28/GT2860R_707160_5.htm)
GT2860R - 707160-7 (http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT28/GT2860R_707160_7.htm)
GT2860RS - 739548-1 (http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT28/GT2860RS_739548_1.htm)
GT2871R - 472560-15 (http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT28/GT2871R_472560_15.htm)
GT2871R - 743347-1 (http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT28/GT2871R_743347_1.htm)
GT2871R - 707160-10 (http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT28/GT2871R_707160_10.htm)
GT2871R - 743347-2 (http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT28/GT2871R_743347_2.htm)
GT2871R - 771847-1 (http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT28/GT2871R_771847_1.htm)
GT2876R - 705330-1 (http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT28/GT2876R_705330_1.htm)
GT2876R - 705330-2 (http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT28/GT2876R_705330_2.htm)
sparkie i used the xpower picture as an example thats not my one, i'll have a butchers tommmorrow if its got garrett on it is it a good version?
Garrett is the only brand you want.
Ross, what's worrying is you say 'it's this exact one'.
What I also notice is that the intake is not the right type to fit the GTT either. You'd need to mess with that as well.
Garrett built those Rollerbearings to replace Nissan's stock units, so they're desgined on the flanges and pipework positioning. It's a little more work than fiddling with the housing position. Plus only two of the stud holes in the exhaust housing match up to the Renault elbow.
Andrew Cooke
09-11-2008, 11:58
Garrett built those Rollerbearings to replace Nissan's stock units, so they're desgined on the flanges and pipework positioning. It's a little more work than fiddling with the housing position. Plus only two of the stud holes in the exhaust housing match up to the Renault elbow.
all true, it's so long since I fitted one to my GTT engine I'd forgotten about the fiddling about needed to make it fit. But then it fades into insignificance after all the fiddling-to-make-stuff-fit that I've done since.
Was this the one with the 60 trim wheel? What's it like?
Andrew Cooke
09-11-2008, 12:18
Was this the one with the 60 trim wheel? What's it like?
cripes, it was a while ago. Compared to the 50 trim with a .49 rear end, I also tried a 50 trim with a .64 rear end. This was the 60 trim with a .64 rear end, but not the normal one, it has the S15 style wall between the turbine and wastegate exit (supposed to help spool). It also has the S15 T4 type compressor housing rather than the GTiR T3 size one. I really struggled to get a lot of boost out of it, I managed eventually with a huge spring on the wastegate and a bleed.
After I'd run the two I kept the GT on, it spooled later, but the throttle control once above the spool point was better. The reality is that I find the T28s too unresponsive for hillclimb use. I used it for the 11 sec runs, but was pretty much maxed out, at the time I almost went out and bought something bigger just to go back for a 10 :D With the Gordi full boost was 4300, for the hills I wanted that at 3500, but at the strip could live with 5500, and maybe a bit more.
how come you didnt go for the 10sec run ??
Andrew Cooke
09-11-2008, 16:04
how come you didnt go for the 10sec run ??
couldn't be arsed
oh no, its not a garrett its a copy and trev it came as a spare in the car but was never fitted its totally wrong for the car, so no joy there.
i'm quite happy that the t2/t25 i have now works which is just nice to know so will stop messing about and simply make do.
cripes, it was a while ago. Compared to the 50 trim with a .49 rear end, I also tried a 50 trim with a .64 rear end. This was the 60 trim with a .64 rear end, but not the normal one, it has the S15 style wall between the turbine and wastegate exit (supposed to help spool). It also has the S15 T4 type compressor housing rather than the GTiR T3 size one. I really struggled to get a lot of boost out of it, I managed eventually with a huge spring on the wastegate and a bleed.
After I'd run the two I kept the GT on, it spooled later, but the throttle control once above the spool point was better. The reality is that I find the T28s too unresponsive for hillclimb use. I used it for the 11 sec runs, but was pretty much maxed out, at the time I almost went out and bought something bigger just to go back for a 10 :D With the Gordi full boost was 4300, for the hills I wanted that at 3500, but at the strip could live with 5500, and maybe a bit more.
So, what was the maximum boost you were able to get out of it before you ran into problems? I vaguely remember Ant@backyard had the same problem a few years ago, he was having trouble getting over 22psi, or there abouts...
Andrew Cooke
10-11-2008, 18:46
So, what was the maximum boost you were able to get out of it before you ran into problems? I vaguely remember Ant@backyard had the same problem a few years ago, he was having trouble getting over 22psi, or there abouts...
it got hard work at about 18psi, but I managed to get it to 25psi.
Oky doky. I don't quite need 25psi, but I may have to change a few bits if I can't get more than 18psi.
Rob@Backyardracing
10-11-2008, 19:42
Im on the GT2560R .64 aka GT28r or whatever it says. Max boost i can make is 24psi, i get surge at 25psi. This is with no actuator pipe. Also fitting was a bit of a faf with having to strighten the actuator rod after lining up the housings to what suited my boost run then i made the rod adjustable with a sleave, tap and die as it wasnt long enough to reach after i moved it to fit to the front of the comp (think i tapped a thread for this to for the mount). Ive now got this tight as it will go with no more boost, more VE needed :coffee: next thing on list is to shift cam timing and more revs.
Ant did only make 22 with standard cam sure his was the older version of compressor housing thats if theres one? i may be getting confused? also looking throw old timing slips he lost .1 second on 60fts with these larger .64 housings with NOS (so no lag).
Eeeeeeeee T25, gas, 23"MH, 1.6 60fts....:cool:
Rob@Backyardracing
10-11-2008, 19:46
Oh also 3 bolts fit the backend. 2 fit ok the 3rd i had to elongate the 4th is just a bolt with big washer. Or am i wrong ill have go check...:crap:
You're right on the studs, as i've only got 2 through the stock elbow at the moment and the 3rd is held on with a washer. I've got a v band that needs welding up with the downpipe sitting around.
Are you using the actuator supplied? The one I have has an 8psi spring but I was going to chane it for a -31. I also had to run a die down the actoatur rod and put an adjustable arm on it. I haven't actually tested it yet, so i'll have to see what happens, it's not on a stock cam either.
The spec i've got is basically an RS but the comp wheel is .7mm smaller on the inducer.
Andrew Cooke
10-11-2008, 19:58
Oh also 3 bolts fit the backend. 2 fit ok the 3rd i had to elongate the 4th is just a bolt with big washer. Or am i wrong ill have go check...:crap:
I could only fit 2 bolts, 3 bolts fitted the T3/25
There also seems to be a variation in GT rear housings, i've noticed the wastegate arms are different with the U.S supplied ones compared to the European. I wonder if the stud patterns alter... I'll have a look tommorrow at work.
Rob@Backyardracing
10-11-2008, 20:07
Just taken a look ive got 3 bolts fitted and 4th on washer. ive got a custom DP but shame flange. Also im using the act they sent me..
Andrew Cooke
10-11-2008, 20:14
There also seems to be a variation in GT rear housings, i've noticed the wastegate arms are different with the U.S supplied ones compared to the European. I wonder if the stud patterns alter... I'll have a look tommorrow at work.
or Australia..
I used the standard actuator for a bit, I know I swapped it for a Forge one (whole new can of worms, spring testing, phone calls etc :() I can't remember when, or why I swapped, but then this was 4/5 years ago.
Anyone tried a -34 with one? I know the -31 has a 9psi spring and the -34 has a 12psi spring. I'll try both to compare I guess...
Anyone tried a -34 with one? I know the -31 has a 9psi spring and the -34 has a 12psi spring. I'll try both to compare I guess...
Mine has a -34 :)
ahh,you're on about the gt28 though are'nt ya,sorry i'l shut up :)
Andrew Cooke
10-11-2008, 23:44
Anyone tried a -34 with one? I know the -31 has a 9psi spring and the -34 has a 12psi spring. I'll try both to compare I guess...
fit the stiffest one you can find, I don't think you'll have a problem with creap
I have got a brand new one of these turbos (garrett) to fit with a 0.49 a/r rear housing .... probaly be next year in all honesty before i get a chance to whack it on .... got most of the fittings for it ready ...... just need a lower 90 degree bend water pipe (will existing one fit ???) and a actuator for it ....... was gonna buy the ktec T3 one as it should bolt in place .... anyone used one of these ???
Also was told to use the oil fitting with a restrictor in the top of the turbo , is this is correct for the R5 too.....?
Will i need more than 18psi (manifold) with this turbo on a road car ??? Im guessing it should be making over 190Bhp at this kinda boost level if fuelled correctly.
BB blowers don't require as much oil as the old skool journal type, so in most cases a restrictor inline, or a smaller diameter oil feed pipe, is required.
I seem to recall circa 60psi oil pressure is the threshold point, so if your gtt's oil pressure @ the turbo inlet isn't anywhere near that, you should be ok as is.
Even though you've got the smaller .49a/r housing, you might still find the turbo is a touch too laggy - This being because you're still running the same 53.x mm turbine wheel that comes with all the gt2860 series blowers.
dave j gtt
11-11-2008, 15:42
couldn't be arsed
you beat who needed beating :D :laugh:
Rob@Backyardracing
11-11-2008, 17:52
Im not using a restrictor with mine. As said, the GT has pants oil pressure be ok. :)
Andrew Cooke
11-11-2008, 17:55
Im not using a restrictor with mine. As said, the GT has pants oil pressure be ok. :)
there's a small restrictor built into the top of the turbo, I didn't use anything further.
there's a small restrictor built into the top of the turbo, I didn't use anything further.
its just that when you buy one from ATP they supply a restrictor as part of the oil adaptor, I binned mine off too.
Rob@Backyardracing
11-11-2008, 18:03
there's a small restrictor built into the top of the turbo, I didn't use anything further.
Oh Never seen this:crap: when i ordered my top adaptor from ATP i chose none restricted so i just guessed that was that.. hay ho..:)
Andrew Cooke
11-11-2008, 18:19
Oh Never seen this:crap: when i ordered my top adaptor from ATP i chose none restricted so i just guessed that was that.. hay ho..:)
maybe yours doesn't. It's pretty obvious when you look into the top of the housing.
Try and fanny about using this set up :cool: Could have built a match stick model of Big Ben quicker than getting the housing, bends and ac/rod straight and in place *lol*. Does the trick though ;)
http://www.rtoc.org/boards/picture.php?albumid=208&pictureid=1977
That looks nearly the same as what i've got going on, Karl, although the charge cooler core i'm using is about the same size as a GT tuning double capacity intercooler:D. Still, uber short pipe run.
That looks nearly the same as what i've got going on, Karl, although the charge cooler core i'm using is about the same size as a GT tuning double capacity intercooler:D. Still, uber short pipe run.
Cool :) you using one of Dave's fat one's made for the Pulsar Adam ... here's ya time to break the news to ladies ;)
Pulsar is going at the weekend. It's on the gt turbo i've aquired, after saying i'd never get another one...:D.
It's not one of Dave's, it was originally off a v6 twin turbo race car...
Pulsar is going at the weekend. It's on the gt turbo i've aquired, after saying i'd never get another one...:D.
*lol* Just like the old yellow sticker you used to see in the back of car windows at this season ... a GTT not for Christmas but for life :)! Hardest part is fitting the pre-rad/fan behind the stock bumper, without too much grinding. Quality units from Dave though (any freebies just send them to the po box ;) )
Hope you had fun with the Pulsar though :)
Pulsar is going at the weekend. It's on the gt turbo i've aquired, after saying i'd never get another one...:D.
It's not one of Dave's, it was originally off a v6 twin turbo race car...
V6 race car... must be a quality Bread Bin stroke Mr Frosty machine :) Do you have nuts and juice to go? ;)
:D
I did have fun with it, I just spent so much money on it I actually regret it now. I just got too involved with power and it took the second engine letting go for me to realise that:rolleyes:. If it was as cheap as the 5 to tune/run/maintain, i'd keep it.
The gearbox never let go though, so that's a first:laugh:
:D
I did have fun with it, I just spent so much money on it I actually regret it now. I just got too involved with power and it took the second engine letting go for me to realise that:rolleyes:. If it was as cheap as the 5 to tune/run/maintain, i'd keep it.
The gearbox never let go though, so that's a first:laugh:
Bugger :(
Thank god we have GSF and Thixo at hand rather than JapGeorge, off Ebay to help 'Gift' parts to flood into Blighty, to save a few Bob :)
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