"GT" is garrett's new series of turbos, in terms of fitment they are the sameQuote:
Originally Posted by Jiztec
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"GT" is garrett's new series of turbos, in terms of fitment they are the sameQuote:
Originally Posted by Jiztec
look for a used Greddy manifold. or, lately on ebay ive seen cast iron manifolds with T25/T28 flange. for manifolds with an external wastegate flange, all you need is a block off plate, which you can also find on ebay...
would i be better off keeping my T28 with internal wastegate and get a block plate, or could i make it exteranal??
> so when people refer to the GT28 thats the same as the T28
yes ... and no.
T28 refers to an older model of turbos by Garrett.
It's a hybrid consisting of a T3 compressor and T25 turbine.
The turbine flange dimensions from the T2 family of garret turbos.
GT28 refers to a newer, ball bearing design turbo, which is intended for similar capacity motors.
The better aerodynamics and ball bearing construction result in significantly better spool characteristics.
The GT2860 has a 60mm compressor wheel like the T28 & T3 and would do nicely.
The GT2876 is 76mm and significanty larger.
The older T28 is probably closer to the new GT25XX series or even a smallish GT2259, for D16 applications.
Nick.
GT does not mean ballbearing. Its the 'r' on the end that means roller ballbearing, but your right the GT range is newer and supose to spool faster than the older T series
Some of the GT range also come out in bush bearing.
Running internal gate is cheaper & fine for smaller application.
External gates are better & more precise especially when more power is being applied but comes at a cost of being more expensive
Quote:
Originally Posted by Limbo
Nah hes right dude GT does mean its ball bearing in most cases. GT2860 is a gt28r. They are the same turbo, one is the HKS naming convension and one is the garrett/nissan naming. But Garrett also uses GT2860 on there site so it does get a little confusing. in the GT2840/50/60 and so on series they are usually all T or GT28's but on different model nissans. S15, s14, gtir N14, GTR turbo's.
its really had to explain down to a T because there are soo many names with so many numbers thrown everywhere. Different housing and different wheel conversions also make different GT28 series.
GT just really stands for the Newer series of dual ball bearing turbo's made by garrett.
I'm sure if you purchase the manifold it will come with a block off adaptor plate, if not it looks like a generic 1.5inch 2 bolt exhaust flange which im sure any exhaust shop will have somethign to block it off with. Also i havent looked into the Greddy cast iron manifolds myself but i know that ive only ever once heard of a cast iron manifold breaking so im sure your going to be pretty safe with the ebay ones even if you wanna get them over the greddy. I know the Greddy ones are going to cost you around 300-400 where you can get the cast iron ebay ones for like $100 delivered. Thats just something to look into i guess if your on a tight budget...Quote:
the wastegate. my turbo is a T28 and has internal wastegate so do i just cover that hole if i purchase a manifold like the one above.
So the greddy manifolds are good stuff?
maybe some of the guys on here have had some experience with both the ebay and the greddy cast iron ones and they might be able to tell you the up and downsides to both.
the only thing i can memba is that kat chuckin on kerims axs or sumthin kit n it needed sum heavy customising. wasa bitch to do.
Ok so far this is what i have in mind:
Garrett T28 turbo with internal wastegate.
GReddy turbo manifold/ebay cast iron turbo manifol.
OBD1conversion with chipped P28
Ebay intercooler and piping/Good used lot
BOV
RC Injectors and fuel pump.
Custom Exhaust system and dump pipe.
Upgraded rods - maybe eagle...
Good Tune for street.
What else is ther to be looking at so i can boost my D series engine?
my 2c n expQuote:
Originally Posted by Jiztec
Dont worry about the upgraded roads for now. Focus on your turbo setup and your stock motor will be good for 8-10psi if tuned correctly. Upgrade on the rods can be a decision down the track. Upgrading roads atm is going to cost you alot
Turbo setup sounds great so far...you will have to look at water and oil lines. You can do a cheap setup and get some heavy duty sard High temp silicone tubing and some banjo bolt connections. Or you can get some custom braided setup. I believe Lukenzen bought a kit you can buy. I actually got all my braded stuff custom made myself but other options will work just as good.
you will need a boost gauge of some sort to monitor whats going on.
you will also need a decent boost controller. On the D series you dont want any spikes or else 10psi can turn to 11 and then motor finished...like what happened to luke.
If your planning to run the stock wastegate pressure what ever that is on the t28 you may not need a boost controller.
Cant think of anything else atm. if and when you get the oil and water lines i got pics i can show you how to set them up and where to plug those into the motor to get water and oil feed.
sorry also just remember your going to need to customise your Sump. The dump for the oil on the turbo needs to go into the side of the sump so you can either make a tap fitting with some industrial hose pluggings like on lukenzens build or you can get something custom welded into it like i did. Check pics on my build thread if you need to find out what i mean.
Sorry haha 1 more thing..your going to need an oil line feed reducer to 0.6-1mm. This will stop to much oil/oil pressure blowing the seals on the turbo. Honda motors have more oil pressure than Nissans so the nissan turbo needs the reducer.
Anything else just give me a shout.
Yep like Fo55il said. Dont go with the ebay piping. It wont fit at all, had a mate who had issues. The china intercoolers do the job fairly good tho, just get that and while your getting your exhaust setup made custom, get the guy to make 2.75 inch mandrel bent intercooler piping setup done at the same time.Quote:
Originally Posted by Jiztec
BOV - as fo55il also said, not necessary. BOV's are good to keep the backforse pressure pushing back through the turbo (flutter noise) this isnt that great for turbo's over time. But at the PSI you will be running it wont cause that much issue. To be honest Flutter noise sounds better than BOV anyways and its legal.
WOW thats alot of information there lol i will do some reading up in my spare time
another thing ive been hearing from a few people locally is that i gunna have to lower my compression or something like that for the turbo ???