Okay so I have a stock GT700 kit with built internals. I have added the Greddy boost controller and 5 bar FPR. I am running GT104 race gas and capping max boost at 1.6 peak. What kind of hp am I hitting? Stock GT700 at 1.3 she made 640 rwhp.

I am guessing around 700 rwhp? What is the max these turbo's can make?

 

Is this the turbo?


Garrett GT28 450hp ball bearing turbo MYC Price $2,047.50

Model #:G-GT28-450-BB Manufacturer:Garrett Fitting Guide:Universal


This unit has a T25 type base flange and GT25 type rear flange for the exhaust. Features a huge .70 comp cover with smooth machined bellmouth inlet and 4" inlet. This unit has a .86 exhaust housing in this 450hp form . The comp wheel actually flows 44 LBs/Min and itself is rated near 450hp. Usual ultra reliability and superb response from the Garrett ball bearing design. Sometimes called a GT25/40. Very similar to the HKS GT25/40 but with a different comp cover and different number of blades on the compressor. Great upgrade for SR20DETs and other 2 litre's. A little laggier than the 400hp unit due to the larger exhaust housing.
Compressor Stage

• Hsg. A/R: 0.70
• Wheel Trim: 48
• Model: T04S
• Wheel Diameter: 2.09/3.00
• Horsepower: 450
• Comp Flow Lbs: 44

Turbine Stage

• Hsr A/R: 0.86
• Wheel Trim: 76
• Wheel diameter: 1.85/2.12

If so looks like it would support 900 fwhp which means I should be able to
get 750 rwhp from my car? Can a stock GT700 fueling system handle that?
Right now at 1.6 bars my AFR's are fine.

 

not true, the k16 hybrids are based on the gt2860rs which are rated to 350hp a piece I believe. Plus you must remember you have a tiny k16 turbine housing. I was making about 690whp Peak at 24lbs of boost(creep to 26lbs). You should be right in that area. But your uncorrected number could be above 700rwhp. SAE should be slightly under.



Suman

 

Buddy

the gt700 turbos are not ball bearing turbos. I agree with Suman on this one. Hey Buddy - pm me your number

Jag

 

Suman have you dyno'd yours since you added the bc?

 

pm sent

 

Not true,they are BB......Off of Evo's website below


2. EVO / Garrett Turbos: Our goal of 700+ HP was achieved with a custom built Garrett GT turbocharger. The “GT� is the reason all of our 996TT turbo systems that include these custom turbos start with “GT� in front of the power level they produce. The GT turbocharger we developed is a 100% Garrett GT turbocharger bearing cartridge, bearings, compressor wheel, compressor housing and turbine wheel. We machine and adapt the OEM KKK housings to accept this Garrett GT turbo, which allows for a perfect 100% bolt on fit. This allows for our customers to choose their own exhaust system based upon their sound preference, provided the exhaust is compatible with the flow rate required to support the power level. Additionally, this maintains a nearly OEM appearance and 100 % OEM fit. Our proprietary GT turbos are designed to have 25% quicker boost response while being capable of producing more than 25% more power compared to a KKK24 turbocharger. This increased flow and reduced lag makes for a PERFECT combination of increased low end power while delivering tremendous top end power with 1 precision designed turbo. Most all 996TT turbochargers available in the market place will have sacrifices however we believe that this is the perfect blend of instant boost while maintaining constant air delivery to develop 700 + HP and revving past 7200 RPMS.

 

I have not dyno'ed my car awd since I did the EBC. THe turbos are ball bearing gt2860 cartridges and compressor housings mounted to k16 turbine housings.


S

 

Very interesting.

my turbos have some play in them and they need to be replaced or serviced. Mike at Evo and Alex at MaxRpm have told me that my turbos are not BB turbos. I have been under the impression when I bought my gt700 kit that they came with BB turbos.

Well who's lying?

If I was suppossed to have BB turbos and got non BB turbos then Im gonna be pissed and my turbos should be switched out by EVO to the turbos they advertise!

Jag

 

If it is a GT 700 you should have BB turbos

 

Someone From Evo Want To Chime In. Mike?

 

They are definately ball bearing turbos

 

Not according to Mike.

also are BB Turbos supposed to have some play in the turbine wheels. I know non BB turbos are not supposed to have any play.

also BB turbos have to be water cooled right?

Mike chime in?

 

Mike said that they did non bb turbos on the gt640/700 to save on the cost on the turbos. But I always thought due to the advertising and statements by Stephen at IA that I had BB Turbos.

Alex at MaxRpm told me that my turbos have some play and on one of them the wheel has been making contact with the housing. This is when Mike and Alex told me that I have non bb turbos and I can have mine upgraded to BB turbos with some other changes to the turbo.

Thats why I would like for Mike to chime in here.

Jag

 

play is normal but not when it hits the housing when u press on it...