Turbo G45/42 or its 88

[mrsyclone]

Hello

I´m thinking of buying a GT45BB from PTE. The problem is that they don´t have any delivery time on it yet. My goal is to get around 1000-1100 hp on the engine. The engine is 4.7V6.
Do you think that GT42BB( That I can get right away) will support the horsepowers? I´ve got an offer on ITS88BB. The info. on the turbo is:


Innovative Turbo GT 88 dual ball bearing turbo with R trim turbine wheel, and a .81 tangential turbine housing.

And this will handel around 1000-1100 hp.

I know the GT- series are very heavy turbos, that is one of the downsides that I know of. Do you know anything moore, or have other suggestions? Should I stay with the GT-series, or go with the ITS?

Thanks in advance/R

 

[John Wilde]

Robert the GT-42R in the 76MM will get you the power you need.
We have two of the 74MM going on our 394ci SBC.
Duttweiler really likes the Precision GT Stuff.

ITS makes some good stuff but I would keep away from the R Trim wheel with a smaller motor. They have a problem coming up on boost. What kind of frame is the ITS Turbo?

 

[mrsyclone]

Thank you for your respond. The only info. I have is this:

"88 flows 120lb/minute, and will make 1200 at 100% VE. Most of the V6s make 105-110% VE depending on the cylinder heads.

However the turbine being an R trim, in a T4 turbine housing is good for 1100hp ish.


the turbine housing, which like I said was a .96 T4 with a 3.5" v band welded on. "

Do you have any weight on the GT-serie turbos?

Regards Robert

 

[John Wilde]

I don't but I think Paul 10SV6 on this board can help you out.

 

[LV GN]

Originally posted by John Wilde
Robert the GT-42R in the 76MM will get you the power you need.
We have two of the 74MM going on our 394ci SBC.
Duttweiler really likes the Precision GT Stuff.

ITS makes some good stuff but I would keep away from the R Trim wheel with a smaller motor. They have a problem coming up on boost. What kind of frame is the ITS Turbo?

hi john---it says on pte's website. the gt 42 or 42r comes in 94 to 102mm compresser wheel's. but you have a 76mm? can one be made in the 88mm? do you know the inlet and outlet size's. and what stall would be needed to get this badboy zinging. thanks---len

 

[John Wilde]

Originally posted by LV GN
hi john---it says on pte's website. the gt 42 or 42r comes in 94 to 102mm compresser wheel's. but you have a 76mm? can one be made in the 88mm? do you know the inlet and outlet size's. and what stall would be needed to get this badboy zinging. thanks---len

Len,

On the PTE Web Site they give the exducer number.
The inducer is the measurement at the opening of the turbo.
The GT-42 is offered in 72,74 and 76MM from what I have heard.
The GT-45 is offered in 80 and 88 and I am sure they will throw a 76 wheel in there if you want it. Same with the GT-47 that is a 88mm but they will put a 76 wheel in it. The GT-55 is 91MM and the GT60 is between 100 and 106MM.

To answer your question I think you would have to call PT.
I don't know about a GT-42 88 but I am sure they can give you an 88 in the GT-45. Cal Hartline is testing some stuff, maybe he can chime in if Don, Joe, Brian Harry or Jim don't.

 

[d0n_3d]

The GT42 turbo is used in 3 different configurations and they are all in both ball bearing and non-ball bearing.

GT4271, GT4274, and GT4276 are the names and they all use 71mm, 74mm, and 76mm compressor wheels respectively (this is the INDUCER measurement which is the front side of the compressor that you see)

The 71 supports 1,000 net horsepower, the 74 supports 1,100 and the 76 supports 1,200.

The GT45R is a brand new ball bearing turbo in which I don't know too much about quite yet but it's due out fairly soon from what I hear. It will be an in-between turbo between the GT42 and GT47.

The GT47 we offer in 3 different configs as well right now being the GT4776 (designed for Fun Ford Outlaw class), GT4780 (82mm compressor) designed for NMRA drag radial class, and GT4788...all these configs are in a large frame style housing.

Now the GT4788 is currently being worked on for putting into a mid-frame setup which will eventually replace the current mid-frame standard 88 turbo.

Phew...hope that helps out everyone...we got some pretty cool stuff coming hopefully by the spring here so stay tuned!

 

[John Wilde]

Don,

Thanks for your time today!

 

[LV GN]

thanks john and don. sounds like the gt42 76 mite go 8 sec. and be easier to spool.

 

[John Wilde]

Len,

Wait until we hear back from ^&* on the New Mid Frame 88.

 

[CTX-SLPR]

Do you think the GT42R (GT42BB he was talking about) in small compressor and turbine would be too much turbo for a steet driven 257cid V6? I'm thinking the GT40R would be a better match?

 

[10SV6]

I had the GT 42 with the 74 mm inducer on at Reynolds in 2003 on my 274 cu in motor. Non ball bearing. If I remember right it went 117 mph or 118 mph in the eighth. 30 psi. 3200 rpm stall convertor at 0 psi. Stalled right around 5000 at 12 psi. It wasn't too bad coming up on boost, and after it got to 5 psi, hold on. It was real quick going from 5 psi to 30, to the point of traction was an issue. There was more left in it.

Later that weekend I switched to a T5 flanged ITS GT 88. Same boost level, both turbos ran pretty much identical 1/8th mile mph. The 88 was a little slower in that transitional boost time. Made getting past the first 100 ft easier.

The little bit that I used the 42, I liked it a lot. Mine was just an off the shelf Garret unit that I got through Cotton's. I don't know if Precision is doing anything different with their's.

 

[d0n_3d]

Originally posted by CTX-SLPR
Do you think the GT42R (GT42BB he was talking about) in small compressor and turbine would be too much turbo for a steet driven 257cid V6? I'm thinking the GT40R would be a better match?

problem is...Garrett hasn't released any kind of time frame on releasing a GT40R...I wish they would but as of right now there's just the non ball bearing 40...

oh yeah...and when I mean the 42 turbos support "net" horsepower...I mean crank or flywheel horsepower...not to the wheels...just in case there's any confusion

and there's also a correction on the GT45R turbo...word is now it probably won't be available any time soon...Garrett is delaying it's release...but other than that I know nothing!

 

[John Wilde]

They gave Matt Hartford a set.
He might have more pull than the average Joe.

Matt Hartford
NHRA Sport Compact Pro RWD
Pomona, CA – October 23-24, 2004
Hartford started out the weekend ranked fifth in points for the Pro RWD class with his the ’04 Summit Racing Chevy Cavalier using twin GT40R turbos. Saturday’s qualifying saw two 7-second runs from Hartford. The first, a 7.287 second pass at 149.07 mph was followed shortly thereafter by a 7.546 second pass at 154.09 mph. Sadly, Hartford’s luck ended on Sunday during the first round of eliminations at the Nitto Tires NHRA Sport Compact World Finals Presented by Subaru Performance Tuning and Import Tuner when his time of 8.160 at 126.32 was not enough to keep him in the running. Hartford holds on to his number five spot in points for the year. Congratulations to Hartford and Summit Racing for having a wonderful year, which included a 6.5 second pass as Hartford made history with the quickest and fastest side-by-side pass in Sport Compact history with fellow Garrett-sponsored driver, Stephan Papadakis. Be sure to watch for Hartford at the start of next season

 

[gasketmaster]

Originally posted by d0n_3d
GT4780 (82mm compressor) designed for NMRA drag radial classs

Don,

What is the approximate HP this turbo will support?

Thanks

 

[d0n_3d]

Originally posted by gasketmaster
Don,

What is the approximate HP this turbo will support?

Thanks

estimated horsepower is about 1300 flywheel

 

[gasketmaster]

Originally posted by d0n_3d
estimated horsepower is about 1300 flywheel

Thanks Don

Tell Patrick(trader) that "Pork Chop" has a Folger's fart can exhaust tip for his new Evo

 

[CTX-SLPR]

hey Don,

Which do you think would be a better match for a 4.1 thats street driven with 3.42 gears and a lock up wanting to make about 450 on pump gas, a GT35R or a GT42R?

Thanks,

 

[d0n_3d]

Originally posted by CTX-SLPR
hey Don,

Which do you think would be a better match for a 4.1 thats street driven with 3.42 gears and a lock up wanting to make about 450 on pump gas, a GT35R or a GT42R?

Thanks,

if I had to choose between the two I would do the smaller GT4271R...always better to go a little bigger and de-tune such as for pump gas...the 35R I think would have to be totally maxed out to make that kind of power on pump gas...

 

[d0n_3d]

Originally posted by gasketmaster
Thanks Don

Tell Patrick(trader) that "Pork Chop" has a Folger's fart can exhaust tip for his new Evo

LOL

I wouldn't put down that Evo...I've ridden in that thing and for a turbo 4 cylinder, that thing hauls @$$...it's a low 13 second car out of the box and with stupid mods it's a mid to low 12 second car just like a Buick...made me a believer! I'm not a fan of rice, but I am a fan of fast cars and even if they are imports and this car is nice!