Im thinking about buying the gt-28rbb turbos for my 91 tt z and not sure if its the best idea. How much difference do these make over stock and are there turbos that would be better than these.

 

[QUOTE=jaredjmoore89]Im thinking about buying the gt-28rbb turbos for my 91 tt z and not sure if its the best idea. How much difference do these make over stock and are there turbos that would be better than these.[/QUOTE come on i need ideas quick about what kinda turbos to get whats best upgrade.

 

there is no quick one size fits all answer. what is your idea of "best"???

 

WHat im asking whats the best turbos to get that give me a lot more horsepower over stock but not a lot of lag. Is the gt28rbb my best way out or should i go for a bigger size or smaller.

 

The GT28r is a good choice for a balance between lag and hp. Don't confuse this turbo for the GT28rs, which is the GT2860rs or "disco potato".The GT28r is good for, with supporting mods 600hp. The garrett name for them is the GT 2560, which is the 2nd to the smallest size you will find being BB. They are also A good choice because the z32 engine is commonly known to handle 600 bhp without internal upgrades.

Not saying it can't handle more, because others have achieved more hp. While others have had less with internal failure. But that is the excepted number. So with that setup you would be well matched with the capabilities of the Z32 motor. The GT 2560 is the same as the old journal bearing T-28, except that it is ball bearing. Z1 sells a T-28 in our stock housings for a good price, but people like Greg Dupree say that the exhaust gas temps go through the roof at higher boost levels because of the inability to make a proper down pipe. Those turbos are called the GT525.

If you want very respectable power with ultra low lag then the GT 2554, or better known as the sport 530's would be a good choice as well. Sport 530's are capable of 530 bhp Hope this helps.

 

Are the 530's a direct bolt up or do i need more modification and i did look at z-1's gt28r kit it was a lil expensive $2400 but u cant go cheap when it comes to the best. I seen on modacar.com they had the same turbos for 800 a piece and all i need would be the oil lines from what i know. Dont get me wrong i would love to have the 530's but wow $3400 is not cheap. With the t28's a jwt ecu upgrade and hks hi power exhaust what hp range would you think i would be achieving.

 

Oh and im just shooting around the 500 range so should i go with the gt525 kit.

 

I would say that if you really want to go on the cheap. Take your turbos have them machined to accommodate the T-28 CHRA. You should be able to get the CHRA for around $450 a piece. You would then have the GT 525 sold by Z1. Go check out what they are selling them for. If that is something that your not inclined to do check out Blouch turbo. They put the BB 2560 CHRA in the stock housing which would be a BB version of the 525 for the same price. $1900

Yes the "sport 530's" or as I like to call them GT 2554's will bolt directly to your exhaust manifolds. You will need 5 bolt down pipes for these turbos, because stock turbos have 4 bolt.

I would not get the JWT ecu. Not because it's bad, but because it's way over priced. Check out ashspec I have one and am very happy with it. Jwt is over priced because they were one of the first on the Z32 scene with performance mods. They haven't got the memo yet that they have competition.

With either the 525's or the bb version you should see (of course with supporting mods) 430 RWHP That's very healthy considering that our ttz average 260 RWHP stock.

 

What 1/4 mile range you think that would drop me to cause 430hp is great but more is better but im thinking the 525's would have less lag than the gt28r's meaning quicker spoil up and accel right, and how much bigger are the 525's over the stock turbos.

 

OH and what kind of warranty comes on them and are they relable as the t-28 bb version cause im lookin for hp and reliability.

 

Im either going with the gt28r bb kit or the 525 which is most reliable and which how much more hp will the 28's push over the 525's and which is most reliable and which spools faster im guessing the 525's since smaller, and which do u think id be most happy with if im mainly looking for power and reliablility, sorry bout all these posts i just want to get what im looking for.

 

jesus, do some research on them. talk to z1.

 

The best research is asking others opinions and thats exactly what im doing i done talked to z1 they told me only what they wanted me to know so they could make more money they reccomended the a kit that was close to $4000 and i highly doubt that i need that.

 

SO ILL SAY THIS AGAIN Im either going with the gt28r bb kit or the 525 which is most reliable and which how much more hp will the 28's push over the 525's and which is most reliable and which spools faster im guessing the 525's since smaller, and which do u think id be most happy with if im mainly looking for power and reliablility, sorry bout all these posts i just want to get what im looking for.

 

525 might be smaller but the GT28 is a Ball bearing turbo, could make it so lag is the same if not then not far enough to even notice. you gotta make your own decisions unfortunatly, so search on each turbo (try twinturbo.net) and see if you can make your own answers...

 

well, according to Z1's website...

gt525
gt600
i dont believe anyone here has had much experience with either turbo, so try twinturbo.net

 

The GT-28R is the Garrett GT 2560R Or you can call it the GT600R Same turbo. Don't confuse it with the GT 28RS which is the Garrett GT 2860RS or disco potato, or 700BB. Kinda wish the retailers wouldn't name these turbos different from what Garrett names them. The boost characteristics of the GT 2560R will be the same if not better then the GT 525's because they are the same compressor, and turbine wheels in a slightly larger housing. But bare in mind that BB are always more reliable Because the are more resistant to compressor surge. They also boost 15-20% faster then journal bearing turbos. if you have the dough then throw it down for the GT 2560R turbos. Here are some links for you to do your research.

http://www.turbobygarrett.com

http://www.ztechz.net/index.html

Now go forth and read. You can give a man a fish to feed him for the day or you can teach him to fish so he can feed himself for life.

 

Heres my plans on what im getting
1. z1 gt600 turbo upgrade kit
2. HKS hi power exhaust system
3. AShspec ECU upgrade
4. z1 intercooler piping w/hks ssqv bov's
5. NEw wiring harness
I estimated it out and its going to cost $4015 buck plus installation and at the moment i have a lil over $3000. Hope this all makes me happy.

 

good list, but minus the BOV's cause they dont do **** the stock recircs work very very well. spend that money on down pipes instead and maybe an injector upgrade.

 

you will also need
1. injectors
2. stronger clutch
3. intercoolers
4. downpipes
5. possibly some type of boost controller

 

The downpipes and intercoolers arent necessary are they and what size injectors are recommended 555cc or larger.

 

they are alot more necessary if you like power and reliability, and they are ESPECIALLY alot more necessary than BOV's.

the nismo 555cc seem pretty popular last time i researched this stuff. idk what these kids like now en days though. if you plan on raising the boost IC's are pretty necessary. ask zlover4life. and DP's are just kind of a no brainer like an exhaust cat-back is. screw IC piping and screw BOV's.

 

the 600s are 5 bolt, so yes you need new downpipes.

they arent required, but stock intercoolers will not provide adequate cooling with upgraded turbos. your power will suffer

 

IM still trying to decide if i want the 600's or the 525's to save money. Id rather have more hp and the bb, but the 525 is cheaper. I still think i wana go with the 600's.

 

save money do it right. whats the price diff anyway i never looked? lol