Tomas L

Even at 24 psi I don't see this combination producing 480 rwhp. No matter how good the turbo is, other modifications has to be made to the engine to increase either VE or rpm to produce that much power.

Doing it at 70 mph only requires 70/100= 70% of the power needed at 100 mph. This gives 340 rwhp at 70 mph.

Pleeeaasssee, lets not go there.
It's when the rotational force of the tire exceeds the grip the tire will spin. In this case a force of approximately 7950 Newton is required.
This force can be multiplied with the tire radius to give torque at the wheels.
This torque can then be divided by gear ratio, final drive ratio, and drivetrain efficieny to give torque at the engine.
This figure alone will say NOTHING. You can have two cars, both with 400 lbft torque and one of them can spin the wheels at 100 mph and the other can only do it at 30 mph.
Why is that? You have to know at what rpm the torque is produced.
In this case you can do these calculations and you will end up with some torque. Then you use the gear ratio and calculate the rpm needed to travel at 100 mph. If you do that and take that torque and that rpm and calculate hp from them you will get 480 rwhp (or really 480/drivetrain efficiency).

If you don't believe this, please make the calculations yourself and if you after that still don't accept this, start a new thread and we'll discuss it further.

Tomas

hosrom_951

specialtool: turn down the boost and run pump gas for 'our' results

John: Since this is a new stage 3, im sure the prices would change? is the price on the website the correct one?

special tool

Thomas - how can you come up with these figures when you don't even know the temperature in my town?? You are missing soo much info, yet you think you have enough to deny a DATALOG??
You didn't even know I had a cam before you contradicted me.
Seriously, these guys are going to start ignoring you because you make blind claims before you have ANY info - This is the behavior of a crazy person.

fast951

Tomas, When I started Vitesse (even now) many people were struggling to get 350rwhp. When I did 400rwhp, people said it can't be done. When I hit 450rwhp they said it can't be done. So I'm not surprised here! If I did the test myself, people question the results. Getting a customer to report his own results is questioned as well. Oh well, some do, some look outside the box, some must do it on their own to be real, some always doubt that it can be done.

Given your expertise, what is the speed of the car at 4th gear, 4200rpm (275x40 - 17, standard 951 gears).? How do you explain the sharp increase in RPM (no clutch slip, loose rear-end)?

You know, none of this matters.. Dyno tells the real story. Vitesse (unlike many others) always publish the dyno results, and the new Stage 3 and new Stage 2 results will be published as well.

Hosrom, I have received projected prices from my suppliers. I expect some price change starting January.

NZ951

Hang on, has anyone claimed or dyno'ed the stage three yet for RWHP figures?

DDP

special tool-
It says you have 405RWHP with the stock exhaust in your sig. ummmm?

NZ951

Oh I didnt notice that... how do you pull another 100 RWHP when you are at 23-24 psi of boost already? 33-34 psi?

special tool

Derek - that is the passage of time. When I dynoed at 405 RWHP I had a stock exhaust and all that other stock stuff.

NZ - yes

This week I'll dyno the new exhaust and I will EASILY make 430 RWHP, SAE corrected.

NZ951

Ah, so lower the exhaust pressure with a bigger exhaust, run a different cam... what do you think that will get ya? 440? Little bit of head... hmmmm what other mods have you ot planned? Thought of water injection at those higher boost levels?

special tool

NZ - I will make 430. When I put John's big valve and a decent intercooler on, I am hitting 500 RWHP, SAE corrected.
If I don't have a 430 RWHP SAE at next dyno, I am posting a pic of me eating my hat.

Actually have a VIDEO of the 405 run. Camera goes from my car rght to the screen where you see the as yet horrible 10-1 afr, etc.

hosrom_951

John, Thanks for the update

Specialtool: were ALL your runs on race gas, including this one? im interested in seeing the 15psi pump gas results.

special tool

Hos no, the 405 rwhp was pump with 12% xylene.

fast951

Guys, peak numbers are sexy. I'm more interested in the area under the power curve. That's why I redesigned the Stage 3 turbo. I want early spoolup (1bar 3300-3500rpm), and HP/TQ 420-450 at the wheels.
At first dyno session, the stock exhaust was dented and probably clogged up (muffler collapsed internally). Back pressure was horrible, I'm surprised 405 was possible. Also during the first dyno session AFR was very rich (remember, I always error on the rich side).

The only difference is the LR 3" exhaust to replaced the bad stock one. Also AFR was fine tuned. Which by itslef reduced spoolup by 300rpm or so. Now 1 boost is at 3400rpm. Next dyno session I'll be satisfied with anything over 420rwhp/tq and a flat power curve. Keep in mind, this is a stock engine, no Orings in the head, stock bottom end. The cam is not stock, and we will probably try the stock cam or the Vitesse cam..

I have developed few products: Performance head, cam and intake manifold with air horns. all will be tested on this car. The goal is to document the gains each made. Something no one else does!

awilson40

I have a solution..... Lets take up a collection for John's latest kit....Have him ship it to me and I will install it on my car and pay for dyno time to tune and test.
Then I will publish my unbiased opinion and the results

NZ951

Recall interaction effect with the mods though!