supracosworth

Is this baby comparable to the T04R in terms of spec? Worth the $700 vendor's asking for?

It is GT42 Turbo (500-1000hp)
GT 42 Compressor (53 Trim) .60 A/R
Gt 42 Turbine Housing (84 Trim) 1.01, 1.15, 1.28 A/R
THIS TURBO FLOW 75 lbs/min
Retail: $900
Also I have GT 40 and GT 45R (Ball bearing) available!

http://cgi.ebay.com/ebaymotors/ws/eB...ayphotohosting

allrotor93

iTrader: (126)

**** no. that turbo is huge. you would never spool it.

infinitebass

Yeah, its probably a bit big. Although I wonder what this GT45R is like!

Blake

93 R1

Yeah a GT42 is definately huge. But worth $700 any day.

BoostedRex

Worth it yes, but you'd need some SERIOUS porting to even think about spooling it. But then again for only $700 it might be worth doing. Just depends on how **** you are about turbo lag. Just my .02

Zach

the_glass_man

iTrader: (2)

Just pair it with a 3 rotor and don't worry about spooling it.

Carl Byck

A 150 shot should spool it just fine

Icemastr

iTrader: (2)

Magnus Motorsports already made a turbo kit using this turbo, if I remember right lag was better than a T78. Although it utilized a 4" downpipe, which would be part of it.

ZoomZoom

iTrader: (2)

The compressor is a bit small. I have a GT3540 and I have a .70 A/R compressor and a 1.06 A/R Exhaust and mine should be alot smaller than the GT42

RETed

Keep in mind, the turbos are not BB unless explicitly mentioned (like the GT45R).&nbsp $900 is still a nice price though.&nbsp A ported 13B should have no problem spooling a GT42xx


-Ted

in2twins

Ted,you sure about that? A Gt42 is bigger than a T88-34D, and a T51spl. Maybe you should tell him what port you recomend for a turbo that likes to flow 95lbs/hr@35psi?
Here's a link to the compressor map http://moreboost.org/graphics/turbos/GT42.jpg

enzo250

A 2 rotor shouldn't have any problems spooling a GT42.
I have the same turbo and will be setting it up this winter. Remember the exhaust housing is divided and a long equal length header with big downpipe will suit this turbo perfectly. The turbine discharge on the GT42 is 5"

Besides if you look closely the wheels are really that big on the GT42. it's the housings that are HUGE. The compressor is actullay the same size as a T72. (i dont remember the exact measurements, i'll have to remeasure them)

Carl Byck

Let me know this winter when it starts to spool, see you at the end of the 1/4 next spring It is larger than a T72 on the hotside, and a little different trim on the compressor, which is ~102mm. If you have what it takes to support 600-750rwhp, have at it, but it is not comparable to a TO4R, not even close. This is not the turbo for somone who needs to ask what it is. For anything but drag racing, it would be slow to spool, (2-3 seconds on a streetport to spool it), then spin the tires til your at the cords, I'd like to see you try and hook up with street tires(any size) at the 25-35psi where this turbo lives. If you think it's similar to what Magnus sells ask him........... I'm just saying that unless your goal is 600-700+rwhp, and you have the $$$$ and expertise to back it up this is not a good idea. Enzo, I am sure you'll show me a dyno in a couple of months to prove me wrong, and I wish you the best with your project, but suggesting that this turbo is suitable for sombody who asked if it is similar to a TO4R, is not the best service you can give the guy. A PT67 is a TO4R, and I am sure that a friend of mine with a dual BB 67 on a divided tuned manifold will chime in, and say, that an off the shelf GT42 is not remotely similar to a TO4R, nor is it for the meek, or inexperienced, nor does it belong on the street. LMK what you discover Enzo, Carl

supracosworth

Okay thanks for steering me away from any potentially disastrous purchase.

crispeed

I've seen and used both trims on that turbo!

On the compresoor side the 53 trim is basicaly a 74 mm and 72 mm on the 56 trim.
What's huge on the turbo would be the turbine wheel which measures 3.5 inches on the exducer. Also the compressor and turbine housings are pretty large in dimensions so they do take up pretty much a lot of room in the engine bay.
These tubos do actualy support 1000 rwhp. The ball bearing versions spools just as quick as a regular Q-trim, T-series turbonetics turbo. I've seen one do 710 rwhp on a 13B at reasonable boost!
A saw a 2JZ Supra lay down 990 rwhp at 32 psi with that tubo and made full boost at 5500 rpm with the 1.15 turbine housing. According to the owner and dyno results it out spooled and made more power than the T-88H turbo that was on there before.
As mention above it's no way equivalent to a T04R turbo no do it belong on anything on the street unless you're looking for 650 to 750 rwhp and planed on running 30 psi plus!

dvls-7

So when are we putting that together Chris....that should be ok to take down a pair of pistons guys we know..... .....

RETed

Uh, if the numbers on that link is correct, it looks like the EXACT same wheels used on the T51R Kai and the T51R Kai SPL...

Sure, the compressor maps look intimidating, but you can get the 13B to run it right at the edge of it's efficiency on the lower left corner of the top efficiency plateau.

Don't we have a bunch of people running the T51R Kai now?

BB centers make it easier to spool.&nbsp Run the smallest turbine A/R, and it should work...

Sure, it's best efficiency (smack dab in the middle of the highest efficiency plateau) is making close to 1000hp, but do you really need the engine to be able to flow that kinda numbers? Anything 70% and over is usually good to me...



-Ted

enzo250

Well i never meant to say i would recommend it for the street. I was only saying that a 13B would have no problems spooling a GT42. And yes the GT42 is no way near a T04R!

45psi

If anyone knows how to host the pics, I can send you the pics of my gt42 next to my old t88. I also have the pics with the gt42 installed on my mr2.

93 R1

gt42 on a MR2...damn.

seven

Hi,
I am quite interested in this turbo, may need it for my drag car, will be doing a bridgeport on the 13bt running 4 additional injectors, twin fuel pump and running on high octane fuel. Can I offer USD700? And what is the shipment and handling fee, if it is to be sent to Singaore?

crispeed

Take a guess which Supra I'm installing the GT-42 on now presently!
The compressor wheel measures 74 mm on the inducer.
The turbine wheel measures 3.0 inches on the exducer. Basicaly it's the same as the S-trim from Precision turbo.

rx7tt95

There's a shop over here in Miami that puts together many of the GT series turbos (MIC), sure you've heard of them Chris...anyway, I was thinking of going with a straight GT40 compressor w/T4 exhaust turbine, plain bearing. I've heard people comment that the GT35/40 actually spools TOO soon. This would slow it down a bit, provide inexpensive rebuilds and wouldn't choke the top end like the T3 exhaust housing does on the 35/40. My local shop has a 42 they're using on the drag car. It's almost the size of a front plate fer christ's sake! Big, big, big.

RETed

Wow, someone has a clue!


-Ted

rx7tt95

Nah, just guessing really...I've experimented with this upgraded compressor on my T78 (me thinks it's a GT40 going by the exducer measurements) and I really like the power but it just needs to spool sooner and produce a hair more boost. Once the thing spools, the top end is absolutely amazing and it'll just pull and pull past 8K with no dropoff. Tony (Badog) mentioned the top end was better than the 35/40 which, with others input, leads me to believe that I'm "on" to something with this compressor wheel. I just need to mate a properly matched hot side to it and I should be very good to go, go, go. The stock Mitsu turbine probably isn't a perfect match and I'm sure it's not as efficient (no data though) as the new Garretts. If I were pulling 8psi where I'm currently making three, there wouldn't be much that would outrun me on the street down low OR up high. I don't need 15psi at 3K rpm, but 8 would be nice. Since I've already rebuilt it once, I'm not too keen on rebuilding expensive bb stuff every year and truth be told, I've seen too many fast street cars/weekend drag warriors that are just stupid fast using non-big name brand turbos. I believe the shop I frequent purchased the GT42 plain bearing for under $800...can't beat that. I'll spend the $1200 I save on the bb CRHA for tuning and a lot of other stuff. In the end, I won't know if I'm correct until I actually get this thing on the car and test it out!