IanM

I'd like to hear what people are putting down to the wheels with their Vitesse Stage 2 turbo, running between 15 and 18 psi on pump gas and on a 2.5L. I'd also like to know at what rpm you're reaching 300 ft-lb at the wheels. Some of the plots on John's site do not state what boost levels the runs were made at.

My T04E hybrid (0.6 A/R, 3" inlet) put down 311rwhp at 16psi and 325rwhp at 18psi, running a 57 trim compressor wheel (56.6mm inducer / 74.9mm exducer). I reached 300 ft-lb torque to the wheels by 3700rpm. With a 60 trim wheel (58.2mm inducer / 74.9mm exducer), it hit 325rwhp at 17psi, but didn't reach 300 ft-lb to the wheels until 4100rpm. The turbine housing is a KKK #8, but I'm not sure what turbine wheel is in there. I'm considering a Vitesse Stage 2 turbo, but only if I'll see significant improvements with it.

Thanks!
- Ian

Zero10

If you sell your T04E.........

SoloRacer

Here is the original thread with mine.

https://rennlist.com/forums/showthre...25#post2464425


**CORRECTION: My turbo is a Stage III - not a Stage II **

VRSTAGE2

Ian, my car made 341.8 rwhp at 18psi and I'm reaching 300ft-lb at 3500rpm.

I can email you some charts if your intrested.

Ski

jwl's 2.5, at 15psi, 2500 miles after rebuild, made 310/322 but we found an exhaust leak. Never dyno'd it again and two years later it was a 2.8L.

VRSTAGE2, I'd still like a photo of that engine for our book, being JAB Racing built it

fast951

JWL had the older stage 2, VRSTAGE2 has the newer one. Not the same turbo, but close enough. The new turbo supports about 40-50more BHP and spools a tad quicker.. Both are great performers.
I recently made a few changes to the Stage 2 so it spools up even quicker, which equates to more torque and a wider power band.

VRSTAGE2 isn't this the dyno chart that you sent me? VR S2 Pump Gas

fast951

Soloracer, you have the Stage 3 not Stage 2.. Also, I just looked at your chart, something is not correct with your setup.. Compare your run to others (same kit as yours), it's not the same.. Take it off line if you want to discuss further.

VRSTAGE2

Yes, that is my chart.

RolexNJ

I agree your chart doesnt cross at 5250, scaling is off. I went thru this myself. The operator has something calibrated incorrectly, hence, it throws the whole chart off. Been there done that. And this is when I "thought" I broke over 500 RWHP, and was excited as hell. But then pissed!!

theedge

How recently? Did I get one of those? Not that I'll have to worry as much as 2.5 owners but still

fast951

Yes you did!

SoloRacer

Rolex : Don't make assumptions. They just used different scaling for the TQ/HP curves. Take a look at the value for the torque at 5250 and then take a look at the value for the HP at 5250. They are the same. So if the scaling was the same for both HP/TQ they would cross at 5250 as they should. There is nothing wrong with the chart. We dyno'd 10 cars that day and they were the same. Just because the results were not what everyone expected doesn't mean there is anything wrong with the chart. I've heard it all "the dyno operator doesn't know what he is doing" or "you have an exhaust leak", etc. The dyno operator does know what he is doing and we checked for exhaust leaks and found none. I'm open to suggestions but these were the actual results and they are as accurate as any out there.

P.S. If you are unsure how to read the graphs maybe this will clear it up for you: the bottom curve is the HP curve. Go to 5250 on the bottom and then go up to where you would hit the bottom curve. Look to the left side and see that the value is approx 285. Now find 5250 again on the bottom and this time keep going up until you hit the top curve. Now look to the right to see what the value is. Surprise! It's 285 as well - just like it should be. Nothing is wrong with the chart.

theedge

Awsome

SoloRacer

I've sent you an e-mail John. My set-up is mostly a stock car. Aside from the first two sheets on your site the others look to be from ST's car which is far from normal. Now if I look at the 15 psi sheet on your site it looks to be similar to mine but that my numbers are about 10% lower. The main difference is my sheet shows what could to be ignition break up at the end with the little dip before the spike. I look forward to hearing from you.

RolexNJ

Thanks for enlightening me. You are "The Man" my friend. Glad I had you educate me. It is valued people like you which is why I need technical help. Great job, so thanks.

Good luck with that car too, its fabulous!!