Before everyone starts slamming this turbo, I'm not really interested in peoples opinions of it based on tests done on 3 totally different vehicles. I want someones real life opinion of this turbo, someone who has run one. If you've got some hard numbers to support your opinion, between 2 identical vehicles with identical setups, those I would be interested in.
Also, what was involved in fabbing up an intake pipe and hot pipe connection, what silicone couplers did you use, and were there any installation problems?
I've already purchase this turbo, for less than the GT25/40R would have cost me at the cheapest place I could find, partly because of price and need for a turbo ASAP. I have seen opinions of all kinds of turbos that people are running, but I haven't seen anyone here really running this turbo yet everyone claims to know its a POS.
I will be running my stock fuel setup for now, so once I get it and install it, I'll post up my nonscientific findings and personal opinions. After that point I'll begin saving for larger injectors, a new MAFS, and some tuning. I'll try to get a before and after dyno run on this turbo with stock fuel, and with upgraded fuel.
Garrett Gt28RS, anyone running it?
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Onizuka
- Posts: 8450
- Joined: Wed Nov 06, 2002 5:24 pm
- Car: 91 Nissan S13 coupe SR20DET
89 Nissan S14 hatch SR20DE
Is this the "disco potato" turbo?
Sport compact car was only able to get 280 to the ground with it with upgraded fuel system, tuning and stock cams. Sounds alot like the much much cheaper S15 T28 that is more bolt on than the GT28RS. Not a bad turbo, just a stupid buy when you can get pretty much the same thing for less.
Sport compact car was only able to get 280 to the ground with it with upgraded fuel system, tuning and stock cams. Sounds alot like the much much cheaper S15 T28 that is more bolt on than the GT28RS. Not a bad turbo, just a stupid buy when you can get pretty much the same thing for less.
I'm sorry to have to say this again and again but I think it's a bad idea to make so many assumtions on that turbo based on what one magazine did with it in their car (tuned by JWT a long time ago I might add). Chances are, out of sheer curiousity I will be purchasing one of these turbos and having it tuned at Secret Services to see what it can actually do (unless someone else does it first). Judging by the torque in the SCC dyno graph, I feel the turbo has a good ways to go. We'll see. How long till you get those injectors Bali?
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jbsr20fiend
- Posts: 111
- Joined: Mon Oct 07, 2002 9:29 am
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dj_lennon_franz
- Posts: 496
- Joined: Wed Nov 20, 2002 2:24 pm
- Car: 1992 240sx
I don't trust magazines and internet trash talk, the fact still stands that no one here seems to be using this turbo, so we have no real first hand knowledge. In theory, the turbo should be good for around 350hp which is fine for my purposes. I also like the fact that it looks basically like a stock turbo, doesn't draw a ton of attention when you pop the hood. It also seems like it would take less fabrication work, at least for the intake tube and wastegate actuator, its easier to sneak 3" pipe around the PS pump than it is 4".
I'm currently running a Hybrid FMIC, Greddy Turbo Extension and downpipe, cheap test pipe, and the Apexi 3" N1 with a manual boost controller. I'm pretty happy with the T25 aside from the fact that mine is in poor shape, won't hold anything above 8psi for more than a second, and smokes like a crackwhore. I'm guessing I'll be really impressed with the GT28RS, and it fits my daily needs. I'm not a drifter, and I'm not a drag racer, I'm just a daily driver who likes a little fun once in a while.
I'm currently running a Hybrid FMIC, Greddy Turbo Extension and downpipe, cheap test pipe, and the Apexi 3" N1 with a manual boost controller. I'm pretty happy with the T25 aside from the fact that mine is in poor shape, won't hold anything above 8psi for more than a second, and smokes like a crackwhore. I'm guessing I'll be really impressed with the GT28RS, and it fits my daily needs. I'm not a drifter, and I'm not a drag racer, I'm just a daily driver who likes a little fun once in a while.
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dj_lennon_franz
- Posts: 496
- Joined: Wed Nov 20, 2002 2:24 pm
- Car: 1992 240sx
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MainEvent212
- Posts: 4182
- Joined: Tue Mar 04, 2003 1:21 pm
- Car: 95 Nissan 240SX SE w/ SR20DET+goodies
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Cyberkreig
- Posts: 3048
- Joined: Sun Sep 01, 2002 4:40 pm
- Car: 1993 Nissan 240SX SR
- Contact:
I love it so far, and I'm just running 14lbs. I can't really compare it to anything else, having only felt a stock T25 and S14 T28, but it definately spools quick. The RPM range SCC gave for the boost levels is pretty much dead on. 14lbs comes on pretty fast, its got good Tq, it'll break em free at the top of first and on a good day I'll break the tires at the top of first, and roast all of 2nd gear. In the rain, you don't want to experience boost in 2nd or 3rd. I had someone tailgating me in the rain last week, so I wanted to put a little distance between us. In 2nd gear, I just gave it enough gas to get boost to kick in and the car went sideways. This was at around 3000-3500 rpm.
This turbo is good for my application, a daily driven vehicle. Its not real laggy, its got good power, the turbo was brand new so I don't have to worry about the seals going anytime soon, and its capable of a decent amount of boost if I upgrade my injectors and MAFS. I think it'll do 21 lbs if my memory serves me correctly.
If someone wants to donate some larger injectors and a Z32 MAFS, I'll go to Secret Services right away and have them max it out. But until I get up more money, I can only tell you what the turbo will do on a stock untuned fuel system.
This turbo is good for my application, a daily driven vehicle. Its not real laggy, its got good power, the turbo was brand new so I don't have to worry about the seals going anytime soon, and its capable of a decent amount of boost if I upgrade my injectors and MAFS. I think it'll do 21 lbs if my memory serves me correctly.
If someone wants to donate some larger injectors and a Z32 MAFS, I'll go to Secret Services right away and have them max it out. But until I get up more money, I can only tell you what the turbo will do on a stock untuned fuel system.
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Cyberkreig
- Posts: 3048
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- Car: 1993 Nissan 240SX SR
- Contact:
Please do Cyber im looking for a new set up.Cyberkreig wrote:I just pickedup a brand new t25/28 hybrid. .84 turbine .68 compressor. Its not BB but i have heard nothing but good things about it from the mazda and mitsu camps. Not to mention it's sub $500 pricetag. I'll be sure to post a review once its installed.
Cyberkreig wrote:I just pickedup a brand new t25/28 hybrid. .84 turbine .68 compressor. Its not BB but i have heard nothing but good things about it from the mazda and mitsu camps. Not to mention it's sub $500 pricetag. I'll be sure to post a review once its installed.
What are the specs?
Compressor side: Wheel Trim, Inducer, Major, Inlet, Outlet, & AR???
Turbine side: Wheel Trim, Exducer, Major, & AR???
LSB_11 wrote:Def, i know what you can get the GT28RS in, i was wondering if anyone new anymore about the differences between the GT28RS and the s15 T28 compressor, and is it worth the extra price tag.
I think it is:Model Wheel Trim Inducer Major Inlet Outlet AR (comp)S15 T28 60 46.6 60.1 60 50 0.60GT28RS 62 47.2 60.1 0.60
I do not have the Inlet / Outlet size.
If you want I can send you a chart I made of all the turbos w/ specs.
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s13sr20chris
- Posts: 4148
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- Car: '89 Nissan S13 w/redtop running 13psi and not leaking fuel anymore
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i wuold love to look at that chart, my email is [email protected] thank you for that technical answer.
I do not claim this to be 100% correct. Please only use this as a guide.
I started to gather info on turbos to recreate the N1 spec GTR turbos. Later I found the s15 T28, and saw some nice dyno results. Then I stumbled on to the Disco potatoe craze, and some shady vendors try to sell the GT28R as the disco potatoe. Later I ran into a thread on Nico, on how much better in power the GT25R is than the GT28RS. Looking at the GT25R specs, does not compare to the GT28RS. What the hell is these ppl talking about??? Finally I found the GT25/40R spec, and it is the same spec that everyone is talking about. So I said screw it, I'm making a chart before I lose my mind!!!:D
I started to gather info on turbos to recreate the N1 spec GTR turbos. Later I found the s15 T28, and saw some nice dyno results. Then I stumbled on to the Disco potatoe craze, and some shady vendors try to sell the GT28R as the disco potatoe. Later I ran into a thread on Nico, on how much better in power the GT25R is than the GT28RS. Looking at the GT25R specs, does not compare to the GT28RS. What the hell is these ppl talking about??? Finally I found the GT25/40R spec, and it is the same spec that everyone is talking about. So I said screw it, I'm making a chart before I lose my mind!!!:D
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f150intally
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Daidae wrote:I do not claim this to be 100% correct. Please only use this as a guide.
I started to gather info on turbos to recreate the N1 spec GTR turbos. Later I found the s15 T28, and saw some nice dyno results. Then I stumbled on to the Disco potatoe craze, and some shady vendors try to sell the GT28R as the disco potatoe. Later I ran into a thread on Nico, on how much better in power the GT25R is than the GT28RS. Looking at the GT25R specs, does not compare to the GT28RS. What the hell is these ppl talking about??? Finally I found the GT25/40R spec, and it is the same spec that everyone is talking about. So I said screw it, I'm making a chart before I lose my mind!!!:D
do you have this in excel format by chance?????? PLease?????