1 PS = 75 kp·m/s = 0.73549875 kW = 0.986 hp (SAE)
297 PS = 292 HP
.62 BAR = 9 PSI

This dyno is corrected to "flywheel PS" by an unknown conversion factor, though it is typical to use 15%, so the "real" wheel HP is about 250 at 9 PSI.

Can't say the porting did much for the power - certainly not as much as running a better EMS (like the EMU) would have done.

 

I would have liked to see some numbers on it w/out the blower so we could get an idea of how effective the port was...Well, how much bigger is the exhaust port now?

 

I don't understand his dyno. He said the blue was another car and not his?

 

I'd like to hear more details on the porting. Did the focus on the exhaust or intake? How much larger are the openings?

292 whp is not hard to get with a stock engine + greddy kit, so it's hard to say how much it helped.

 

Congrats Nice Ride!!!

 

Τhank you for your help with the conversion of units, I did not say that the porting did much for the power but I thing that there is a big difference in the torque.
Stock I was about 19 KgM
Turbo about 30-32 KgM
Ported turbo about 39 KgM after all those runs on the dynamometer.

After all I prefer 300ps with 39KgM than 350ps with 32KgM.

Any way we are in the beginning with that motor we have to do many things with that basic setup (turbine, intake, intercooler, lightweight flywheel etc)

Is there an other dyno from a ported turbo here? I am curious.

Thanks for sharing

 

Actually the bold lines (power and torque) are from an other car with turbo not ported

 

We focus on both ports exhaust and intake
How can I describe you how much larger are the openings?

 

Here's a good thread you may want to check out. It lists rear wheel hp dyno plots of known turbo and Supercharger kits on the RX8. None of them are on ported motors though.

https://www.rx8club.com/series-i-major-horsepower-upgrades-93/dyno-comparison-rx-8-turbo-supercharger-etc-115447/

 

Parakalo

137.43 ft/lbs

217 - 231 ft/lbs

282 ft/lbs

Though that is a nice thought, it really isn't a choice since the two are interrelated. If you make a lot of torque, but not a lot of power, that is because your engine is running out of breath up top, not because you did something magical down low.
Once again, we are not sure how accurate these numbers are since your dyno operator was using some sort of conversion factor to calculcate back to flywheel numbers (though that is generally not needed for measuring torque).
That said, those are not particularly impressive numbers at 9 PSI on the GReddy, especially if it is corrected.

 

hmm, I wouldn't say no to 300 whp and 300 lb/ft torque.

 

but the video looks cool ! hahaha

 

Neither would I.
But the plots are showing 250 RWHP and 250 to 280 ft/lbs of torque, depending on what was really going on there as far as conversion factor is concerned.
Those numbers should be attainable at 5 - 6 PSI.

 

this is what I get for not reading the legend. flywheel power isn't that useful. If we're talking about flywheel, then I guess I'm in the 330 range!

 

Let’s compare my dynamometer with yours

With a stock car I have 19 KgM or 137.43 ft/lbs as you said.
Here https://www.rx8club.com/showthread.php?t=115447 I see the same number.
With greddy kit I have 30-32 or 217 - 231 ft/lbs with your conversion, once again the same numbers

I’m confused

 

is ur car an auto? in the video both your hands are on the steering wheel when the car is shifting gears...? or am i missing something..

 

But you say your motor is ported. Where is the advantage?

 

I also said ported+stock greddy turbo @ 9 PSI 282 tg compared 217-231 tg with stock renesis+stock greddy turbo at the same PSI+at the same dynamometer

Anyway I just wanted to show you my video

 

The video is awesome. A lot of fun to watch and nicely edited.

I'm just not sure what the interaction is between the porting and the boost. Porting doesn't typically increase torque as much as it does power, which seems to be the opposite of what your graph shows.

 

You are missing something.
You can see him reach down and shift when needed. You are just mistaking his throttle application and lift because of the BOV.
If you listen, you can hear that the motor is still at the same RPM when he gets back on it during those moments when you hear the BOV while both hands are on the wheel.

 

still no much info in detail of the porting i guess..

no size of the ports..

 

Dude in all seriousness...It's not the size of the ports...its how you use them...

MM however does raise an interesting question given the information available...

 

I like you car. Now you gotta bust out this move! http://www.youtube.com/watch?v=R1_VM0j6d5k

 

That's called the "Rockford". Look it up.

 

Cause of a tv show from 1974?
Showing people, makes things... alot more easy.