Zero R

iTrader: (1)

I sell just the turbo's, or kits, but no kits without turbos hopefully that makes it clear for people. If you want to buy just a turbo I can match pretty much anyones price, and then you can have fun making your own kit, hey some people are into it,I know I am! I will not sell just manifolds and DP's, at least not for awhile , I have my reasons. Hope that helps!!!

vspecpgt

what about layaway!!! and the price would drop a bit if we only need just the turbo the manifold and the dp.. i already have block off plates and and oil lines etc.... i will buy one of these kits. just not for a while......

flubyux2

i was lookin in the catalog, and i was thinking...

my friend has had a GT37 on his Starion (2.6L) for about a year now. he can get 15 psi by roughly 3500. hes got the 82mm compressor on it and has the 1.12 exhaust side.

for my supra, im thinkin i want some sort of hybrid. i really would prefer the 88mm compressor but i dont reall what an exhaust as big as 1.34. Garrett is showing an optional 1.19 exhaust side. are they saying i can get the 88mm compressor w/ the 1.19 exhaust side? that would be wicked good. only a hair bigger than my buddies GT37, so i could get similar spool characteristics.

am i reading the catlog right; do they make the 1.19 exhaust side available w/ the 88mm compressor? if so, im totally down with that. only problem is, i may burn out my budget on my engine build

kabooski

other then quicker spool
is there any gain in HP numbers in the GT40R over the non R?

I almost forgot there is a semi famous FD
That had a greddy T78 running 27PSI
and he then switched to a GT40 with a "custom" Turbine housing and made near the same numbers @20PSI
something over 500RWHP (540) I think

10.2 consistant in the 1/4 so far @20PSI

POM HB

kabooski,

Can you find more info about him? If the GT40 is really that eff. than T78, plus it spools that faster, it'll be the big ticket for the new generation of 13B!

Zero R

iTrader: (1)

I know the comp wheel is smaller on the GT40 82mm versus GT40R with 88mm wheel.

I believe they are rated at the same HP level though I would need to go look in the books to be sure.

zkeller

iTrader: (47)

My bad. Dave was talking about the GT35/40 kit, not the 40R.

I am almost done with my installation and am hoping to get some dyno time real soon.

kabooski

the GT4088 is 88 mm wheel correct
but the "GT4088" with out a BB or R is not a DBB unit right?

flubyux2

absolutly right Kabooskery...

the R means its dual steel ball bearing. no R means its floating or oil wick type bearing.. standard.

the 82mm and the 88mm have very different characteristics... the 82mm loves high boost... like upwards of 3.0 PR, but the 88mm is very happy in the lower boost, like 2.3 PR... take a lookin garrets product catalog. they overlay both efficience maps... you can see that the 82mm extends almost twice as high into the high PR's as the 88mm does... but the 88mm actually flows roughly 10lb/min more over the 82mm for the same efficiency level.

the 4088 is equivalent to a T88... but its more efficient and less rotational inertia. so thats pretty much the direct competition for the 4088.

btw, is there ANY Possible way to mate a smaller exhaustt side on the GT40??? at all? im a little concerned that the 1.19 AR is a tad on the "huge" side for my supra


oh and another thing that my friend pointed out to me is the BB centers arent rebuildable by the turbo shops... when your BB center fails it FAILS... like all the little tiny ***** can come out and screw up everything... and it likes to happen all at once. on the standard floating bearings, you get an indication of impending doom... boost drops off, weird noises start happening. the GT CHRA's "repair" is based off an over-the-counter exchange program... you have to get a whole new CHRA from Garrett or a distributor i guess... Distributors are a little more sparse than turbo shops... like CMR turbo here in the Tampa area. at least thats what charlie (the proprietor of CMR turbo) explained to me.

DELTA_Rotary

I have a GT35 compressor side on my turbo on my eagle talon and I have had it rebuilt. I had an unfortunate accident where my mechanic clocked the compressor housing and then didnt tighten the bolts back on the housing and the housing basically ate the blades off the wheel while on the dyno (I still made 393whp ). You are correct I sent them the turbo and they replaced and exchanged the CHRA and sent it back to me.

Carl Byck

I think there is a .84 Ar available from ATP(sometimes). Considering a PT67.68 Ptrim will make ~750+rwhp on the supra, What will you be using your car for, drag?
I think you will see #s like a .96 TO4R with that big housing.

kabooski

yes you can custom-mate a .96 Tang T4 Turbine housing
to a GT40...I have seen it with my own eyes
You would need some turbo/machining skills

BoostedRex

I thought I remembered seeing Sean talking about having some .96 A/R GT40R's laying around his shop. You may want to ask him about that.

Zach

flubyux2

ill have to look into it. it sounds like its going to have to be a complete custom unit since there doesnt seem to be a bolt-up combo of a GT40 (standard bearing) w/ a exhaust housing smaller than a .96 AR readily available.

Carl,i am looking for about 600-ish at the wheels, which would put me around 750 at the motor, and that wouldnt be nearing the limits of my internals. i think ill keep it down to 750is, play it on the safe side

this actually isnt going to be my drag car. i have an AWD DSM thats going to be my drag car. the supra is going to be my highway monster... top end only.

Carl Byck

I am assuming this is a MKIV? 600ish is hardly a top end only proposition in that car, in fact that is the extreme low end power wise for that car on a decent sized single. The GT40, will easily make the power, but a PT67 .68 p trim is all you need for your goals. The Supras that are "highway monsters", are T88s, T51s, GT74GT(Q) (S) (R), GT76GT(Q) (S) (R), and GT80GT(Q) (S) (R) amoung others. They are primarily highway, becuase they don"t spool til 100mph or more(assuming 3rd, and 4th gear), and simply incinerate the tires below that speed. I would go with a Boost Logic, or Induction Motorsports kit for your goals. Carl

rx7tt95

Precision is coming out with smaller rear housings for the GT40 plain bearings, both the 82 and 88mm. Not sure when they're going to be available. With the BB center section, you should be able to get away with the larger .96 rear housing flub. The plain bearing GT4082 only comes with the .94 rear housing while the plain bearing GT4088 comes with either a 1.19 or the 1.32(?). The ball bearing R's come with smaller a/r's as sold by A-spec.

I've been messing around with timing on my car (thanks to a few list members) and the 4082 is really getting interesting. I'll mess with it for a few more weeks before Steve Kan comes into town for more tuning, this time on a dynojet. Although I'm happy with the 4082, the 4088 would still be a better street turbo. More hp at lower boost levels. I am assuming the response would be the same if not better with the BB center section.

doncojones

I'm reading through the Garrett GT catalog, and I don't see anything called a GT40R. There is a plain GT40, and there is a GT42R.

Does this "40R" kit you guys (A-Spec) are selling have a ball bearing center section?

Poweraxel

yes the 40R has a ball bearing center section, hence the "R" designation

theres not many places that can get the 40R but A-spec is one of them

zkeller

iTrader: (47)

Here's a pic of my fully installed GT40R kit. Fittment was perfect. Boost builds real quick. Awesome kit!

maxcooper

That looks fantastic, zkeller! I bet it runs great, too. Please post your dynos when you get it tuned and tested.

-Max

Michael Filippello

i'm on the list for one also. can't wait for it to get here.

Mike

BoostedRex

I'm with Max on that one. I am dieing to see a dyno sheet from one of these turbos!!

Zach

zkeller

iTrader: (47)

I gotta call KDR tomarrow and get in the schedule for the dyno. I need to swap out the wastegate spring and figure out why my Profec B is not working.

This turbo pulls and keeps on pulling. It's actually quite dangerous as it comes on real hard and it builds full boost rapidly. I still have not made it to the turbo's sweet spot yet. What would you say Sean, 18PSI?

zkeller

iTrader: (47)

I am sure the list is growing....

One thing that may worry you when you install the kit. The turbo sits real close to the frame.

It does not hit when driving. I am going to install a tranny brace just to be safe.

It's a mean bastard. ***** that clank.