so I have a built vg30dett laying around the garage that just happened to have a pair of JWT sport 600 turbos hanging on it.. since i'm not going twin with that motor I decided to use one on my ls/vtec build.

goal is 275ish whp with emphasis on response, torque, and a broad powerband.
Turbo has a Garrett t25 CHRA with a gt28r compressor wheel and some sort of gt series turbine wheel (more on that later) in a t25 turbine housing.

What i did to the turbo isn't anything major but will make it a tad more efficient.

For starters, the compressor housing...


the housing on the right is what JWT uses on these turbos. Nissan 60 trim t3 .60a/r compressor housing. They are abundant and cheap and just happen to fit the gt28r compressor wheel with no modifications. JWT did this because of space limitations on the z32 platform.
The housing on the left is a 60 trim Garrett T3 compressor housing, .60a/r. It has a much larger volute volume compared to the nissan housing, meaning i'll get just a tad bit more airflow out of the turbo.

Compressor housing has a polished inlet and a ported/gasket matched and polished outlet.. oh yea and it's polished so I get a little bling factor lol




T3 backlplate on a t25 CHRA


I still have to do a little mild cleaning of the compressor wheel since it's a bit dirty/oxidized from sitting.

T3 60 trim housing vs. T04B gt28r compressor housing


Down the road if/when I decide to rebuild these turbos I will install a t04b backplate so I can run a proper gt28r compressor housing on both, mostly since I have the housings just laying around.

And now the confusing part, the turbine wheel


Its a 10 blade, gt based wheel but what's wonky are the measurements.. I can't accurately measure the wheel since my calipers went missing but from what has been posted, its a 53mm inducer (questionable) and a 47.2mm exducer (verified)
Housing is a .63a/r 4-bolt t25 turbine housing (.82 would probably be better but my spare housing got stolen)
The issue is I cannot find any gt2xxxx turbine wheel with this size combo, unless JWT used a custom turbine wheel, which normally they do not do.

Compressor housing installed on turbo



looks much better than the fugly nissan housing.

Turbos come with dual port internal wastegates


There's currently a clearance issue with the current bracket due to the new compressor housing orientation, so I have to cut and widen the bracket for the canister to clear the cover.

The best part is this was all free from random parts I had laying around. Depending on how I like this setup I'll probably upgrade to a 2871r when I get bored and have the money.

Setup will be as follows

stock bottom end B18B1
arp head studs
oem HG
endyn modified oil pump
reinforced stock pan (im so low i'll be modifying the bottom of the pan with 1/8th plate to keep it from getting dented/torn)
Golden Eagle ls/vtec kit

B16 head
stock springs/retainers
gsr cams
gasket matched ports, mild port and polish
Skunk2 Pro series intake manifold, gasket matched as well (throttle body and head)
Skunk2 alpha 70mm TB
phenolic intake and throttle body gaskets

Greddy turbo manifold, ported/gasket matched/polished and ceramic coated
the above turbo
DEI turbine blanket
3" downpipe
3" straight pipe exhaust
2.5" intercooler piping
PWR FMIC
Turbonetics raptor bov

Walbro 255 fuel pump
ERL performance fuel rail
SARD 550cc injectors
FPR TBD
Modified oem IAT sensor (exposed thermocouple)
AEM 3.5 bar map sensor
AEM EMS

Competition clutch 8lb flywheel
Competition clutch stage 5 clutch
Ls trans
obx lsd w/ b16 FD

probably more im forgetting but thats basically it drivetrain/fuel/electronics wise

the car is strictly a street car, no drag racing, etc. A few occasional mountain runs but thats about it. The goal was not to build a "fast" car but a "quick" car.

opinions?

 

fast or gtfo

jk

i love those old 80s turbocoupe garrets, had one just like it on my b16 in 03

 

the only thing off one of those turbos is the compressor housing.
everything else is gt technology

 

cool

 

yea i've had to ford svo 60 trim t3's so far.
i got the one with the polished compressor housing from a kid at school... he literally walked up to me and said do you want this lol.
so i sold it to a buddy who didn't need the compressor housing

 

Boring! Haha, other ways of doing it efficiently in multiple combinations. I know, you are just working with stuff you have laying around. Similar size constraints with the exception of width:

Ball Bearing "Silver Surfer" next to one of my GT2860RS turbos.

 

right now i have about 20 different turbos i could run just sitting around the garage/storage but i want my civic to be a street car thats just fun to drive. If I want to go really fast i'll either go flog the ls7 or drive my s13 (once its finished lol) or just hop on my bike.

since i plan on driving this car almost every day, i want something that I can enjoy, having a car that doesn't make full boost until 6k isn't my idea of a fun dd

 

Who said anything about being fast? Both of the turbos I posted are extremely responsive and support 300whp flawlessly. If you are achieving full boost by 6k RPMs with either of those turbos you have a horrible manifold restriction or some other problem... They both will spool up below 4k at that, I was just showing the size comparison of a more supported outlet and inlet combinations. I was not trying to compare *ahem* sizes, because I am pretty sure all of your vehicles can still be read by dynos...

Don't post "opinions?" unless you actually want some. HeHe.

 

oh i was talking about may particular app. i know both of those turbos well, i talk to mac on an almost daily basis lol.
i just see most people here going with overly big turbos for no reason most of the time lol.

yea im trying to find one of the traditional t04b gt compressor housings, just the 2 bolt outlet flange is 30 bucks :/
I have multiple inlet's and outlets for the nissan housings though, probably try to sell some of those to recoup some monies.

 

Stock B18B, edelbrock manifold, 22psi tapering to 17 by redline. Awesomely fun to drive everyday.

 

see thats exactly what i want, see all that torque down low?!?!?
you can't t ell me that wasn't a blast to drive lol

 

Yes the response was instantaneous from any rpm really. Perfect for AutoX.


Also did good at the track. On shitty BFG's it went 12.88 @ 110.

 

that looked like too much fun.
can't wait to get this damn thing done.
and you ran 22psi on that turbo on a stock bottom end?

 

Yeah why not . Motors in my DD now, compression tested 180-190 across a few months before I took it out 2 years ago when I sold the turbo.

 

what were IAT's like?
oh, 93 or e85?

 

Nice keep it up. That turbo you put together will work nicely for what you want to do and it was free to you since it was parts you already had. Go with it.

 

93. I dont remember about IAT's. Car was street tuned and it ran good. Nothing out of the norm

 

now im getting excited :D

 

If you're looking for responsiveness, you may consider dropping from 2.5" to 2" or 2.25" intercooler piping. The larger volume of the 2.5" is only going to increase lag and decrease responsiveness without ever adding anything positive to the equation. You dont need to go that large for the power you're looking to make. That's my only criticism

 

Im looking for a similar setup for my b18b also but was originally looking at a super 60. Looks like the super 60 does fall out on the top end as soon and was thinking if i did some porting to the turbine housing it would help that a little and fatten up the torque band. Only looking for 230-250 out of it for a fun dd too

 

i don't want to have to do piping twice if i decide to upgrade to a 2871 or something.
the volume difference between the two is negligible imo

 

That's reasonable. When do you hope to have this finished? I'm interested in the results. I'm building a stock block GSR turbo setup for a buddy in his EG and we've been tossing around budget friendly ideas for a quick spooling, streetable turbo. Never thought about going this small, but with E85 i'm sure it could make 325+whp

 

i have a lot of work to do on the chassis... paint the engine bay, get my wiring harnesses done, fuel system, etc.
plus i've got to have a new fender pulled, rolled and painted due to someone cutting a tire (*******)
maybe 6 months, i dunno hopefully sooner

and you won't make anywhere near 325, the turbo only flows 35lb/min at its absolute limit. its efficiency limit is about 31-32lb/min

 

Id say its max is 300whp. I pushed mine pretty much there

 

The GT28R is good for about 300whp. The GT2860RS is capable of around 350whp. The GT2871R is good for around 400-450whp with a nicely setup engine. There are options in the GT30 platform that will work decent as well. In my opinion though, if you are trying to build an "ultimate response high torque" engine, it doesn't get any better than the GT28 variants. Also, with that small of a turbo, pipe sizing (within reason) doesn't make that much of a difference...