johne

oh, and I hear that Pauerman is a great guy/place to buy Turbo's from.

-John

hally

speed force racing's website has it's stage 1 described as spooling to full boost by 2500rpm and good for 325+ rwhp @17psi, peak torque looks like it is at about 3800rpm. that steep gradient on the torque curve looks appealing to a k26/8 owner http://www.speedforceracing.com/imag.../dyno_12_1.jpg
There must be smaller options on the hotside to consider, either the wheel or the housing or both ? of couse there is the stock #6 but maybe this is just a little too small, torque drops off quickly, a better option in the middle somewhere?

Pauerman

Something to consider...

Garrett is now offering a new dual ball-bearing option. They have retained the size and shape of their standard bearing cartridge and have incorporated the dual (steel) ball-bearing design of the GT series into it.

So, the 951 crowd now has a "bolt-on" Garrett DUAL ball-bearing option.

From what I'm told, this ball bearing option will only be available in a select few compressor/turbine wheel configurations. It all has to do with the size of the turbine shaft/wheel compatible with the center cartridge.

I'm picking up a dual BB turbo, #8 housing for a guy in Germany. He's got all the common supporting mods to make this turbo work - should be interesting.

hally

sounds promising Pauerman, what do u you think the torque curve will look like? I don't have any need for 350+ rwhp. I just want instant torque when i put the foot down like a WRX, but just scale it up for the extra 0.5 litres A fast / responsive street car which doesnt run out of breath too much up top making it happy on the track also

jimbo1111

AHHHHHHHHH.... I love turbo talk.

SamGrant951

ditto - Pauer any word on pricing or should we take it to pm?

Mike1982

Vitesse I don't think tells anything about his turbo's such as what he uses. Think about it, if he put everything out there, where would that leave him??... I know when I upgrade my turbo that I will go to vitesse for MANY reasons (have his MAF, Piggyback, chips, etc.) but most of all is the customer service of getting your/mine car back on the street asap and running top notch with just that little bit of running safe side just incase.

hally

The Vitesse stage 2, athough drowned in accolades, seems to have a bigger horsepower emphisis, eg full boost is at or above 3000rpm. peak torque is above 4K rpm & I don't need 400rwhp at 20psi.
What can a garret hybrid offer in competition / improvement on the 27/#6 lineage. It surprises me that with so many rennlisters running street & DE cars that they go for the bigger solution.

special tool

Hally - yeah, yeah, yeah - blahblahblabababablaaaaaah. Peak torque this, RPM that - your car will be TWICE as fast with the Vitesse stage 2. You want to go fast, or be eloquent??????

fast951

Do you know the information on the S2 turbo first hand, or is it something you gathered and it's hearsay? The S2 is VERY fast spooling and makes big numbers... Just in case you have not be following the so many threads, peak numbers is not something I'm interested in, the main goal is the area under the curve.. Where did you get the peak torque over 4000rpm? PLease direct me to this info..

You get a K27/6 car and I drive a car with the VR Stage 2.. both cars are equally modified except the turbo, and both engines, gearings etc are similar.. The Stage 2 car at any boost of 15psi or higher will pull away from the K27/6 car as if the K27/6 car has the emergency brakes on..

It amazes me when people just make a blanket statement without gathering correct data...

tconn

I'm seeing 15psi at about 2900 rpm's and I know I have an exhaust leak on my crossover. The Vitesse S2 is all about torque, and quick spool up not peak HP.

H964

well i dont have a 951 anymore, but i had plans for before selling it. if you are looking for a great turbo for less money, just send your k26/6 to majestic turbo, and have them rebuild it to k 27/6 spec /quick spool, thats all you need if you are looking up to 340 rwhp, plus you will have the factory fit, so no need to replace anything else. that should cost you arounf 700$
i think you will happy with it

hally

John I'm looking at your dyno chart data, nothing else. The torque seems to climb more quickly on the k27/6 chart. From 2500rpm to 3000rpm your chart rises from about 130 to 190. On Tonyg's k27/6 chart torque rises from about 150 to 220. From 3000rpm to 3500 rpm there is a similiar delta in torque chart 190 -> 300, tonyg's 220 -> 320, but you are still behind. Above 3500 of course the stage 2 blows it away of course, but the 27/6 chart is at 1.1 bar boost vs yours at 20psi.

special tool

Hally - only in Tonyland does a 27/6 make 320 rwhp on a 2.5 951 at 1.1 bar.
You are comparing 2 charts that were made at the same boost pressure.

hally

special i am going by the text at the bottom of the chart - it says 1.1 bar, you might need to save the chart and view it full size to read clearly.