Put my rx-8 on the dyno
 

today i went into petit racing and put my car on the dyno.. My rx-8 only got 173.8 HP to thr wheels.. i think someone might of lyed.. Anyone else no anything about this.. All the rotary tech's. were amazed by it and my car is going into some magazine with the specs.

Please tell me its an auto (that would be around an 18% loss which is normal)

if you take his dyno # and do the math (add 10 and divide by .88) you get 208.86 which is dead on considering the engine is still green and allowing for the usual errors due to air temp, tire pressure, etc. If, however, that is a dyno reading from the 247bhp engine well... shit.

Whaaa???:confused:

Those drivetrain losses are almost as bad as an AWD if not more!!

At what RPM. Isn't there a graph you could scan showing the results through the range. Do you just plop down money, and wait in the waiting room for a word of mouth response from the tech.

Ok, this thread scared me so I looked at adamp's old posts and he DOES have an auto. The dyno results are spot on for the 210bhp engine.

pheewww .... thanks for clarification OrangeBingo :-)

smelled it...thank god!
speaking of which, drove it today!

ill post something else though
________
The cigar boss

ah yes thank you for clearing that up

Re: Put my rx-8 on the dyno
 

my heart skipped a beat.....please provide full information when stating things like this.....i don't even have my car yet to judge it myself......

thanks "orangebingo" for the clarification.......

hmm i got to thinking and came up with something:)

Technically, since we know the WHP of the auto is 174 and the BHP is 210, im guessing that we can pretty confidently say that this car recieves about a 17.14285714285714286% drivetrain loss. Now i don't know whether or not auto drivetrain losses are different from manual, but if we applied this percentage to 250 bhp we would come out with about 207 whp, correct? :D :confused: :D

Sorry to scare you guys again but Adam's car is the manual version. He had originally orderred an auto. But he later changed his mind. And through misfortune and/or dumb luck he was able to snag an unsold 6spd silver GT. I was there when he picked it up. His car is in the pics in my other post.

Well, once mine is broken in (assuming it ever arrives), it'll be going on the dyno, too. Got a call from the Service and Parts Manager at the dealership, who has been contacted by someone who's looking into producing aftermarket parts and wants to establish a baseline. :)

But apropos of the low numbers obtained by adamp's car, I have to ask whether it's even been fully broken in. In my past experience, rotaries loosen up considerably after proper break-in.

ooo thanks for clearing that up good duck :)

hmm maybe adam's car isnt broken in yet?

Isn't adamp316, the originator of this thread going to say anything else? He ought to apollagise for stirring this up without all the facts.

Thanks for the informative post

Well then...shit. (again)

Good Duck, you are 100% sure about this? The typical frictional loss for a RWD car in the 200-300bhp range is 17%. The math works out perfectly. It just seems to be too coincidental for the 247bhp version to be putting out the dyno #s one would expect of the 210bhp version.

Anyone with greater knowledge in this area please chime in!

I have connections with a dyno in Austin so whoever gets their car broken in first let me know.

If that horsepower is true then I smell trouble with Mazda.
Remember the class action suit brought against Kia for overstating the horsepower in its 2001-2002 Kia Optima mid-size sedan. Also just recently the Hyundai tiburon 03 model. They offered free extended warranties for overstating horsepower.

If it was the high-power, that equates to a nearly 29.635% loss!!!! This hardly seems likely whether it is broken in or not.

NEED MORE DYNOS!!!

Dont forget the '99 Ford Mustang Cobra scandal. Ford had to pay to have the bhp brought up to the stated 320. Wait, Ford owns Mazda! Oh... shit.

You don't have to go as far as KIA or Ford to look at over stated hp numbers. Remember the Mazda Miata thing? Also, could this be a stuck port thing? I dunno. I would reneg this to being not yet broken in.

This thread is worthless. SOME info would be nice!

I'm pretty certain Adam has the 6spd. He pick it up Monday's night. Wednesday's morning he PM me saying he has close to 350 miles on it. I don't how many miles were on his car when he dyno'ed it. But I don't think it's fully broken-in yet.

Don't start to panic guys. His number is just one car with one dyno. It is not an indication of anything and certainly is not a trend by any stretch. There's too many other unknown factors we don't know about. Wait for more numbers to come in. If nothing else, put your trust in your butt dyno.

There is no f'ing way that the 247HP version would dyno that low, broken in or not. Especially given that mazda went out of its way to make a carbon fiber drive shaft and a lighter flywheel. If that was a 6spd, the must have screwed up the dyno. Not to mention all the reviews were right about the same interms of 0-60 times 5.8-6.0, which your not going to get from a 173 HP and the assumed torque loss. taken into account the fact that the loss matches perfectly with the AT version, I call bullshit

you know how floridians are with numbers,cant count.:D (just kidding)

first off my car is the 6sp.. second of off i have the print outs... third of all i have 600 miles on it and it is pretty broken in.. Im friends with the owner of the dyno and unless his dyno was broken or my specific car is off then those numbers are correct gentleman... some of yall are gettin mad at the wrong person.. i aighnt apoligizin' for scit..... ANywayz good duck was right on the money with all his replies... It maxed horspeower at 88.3 mph. he reved it up in third gear and 4th gear.. HE even did somethin to the air intake and it added an extra 4 horsepower...Take what u want from this thread but dont start hatin on me..... go test is for your self... im out reppin the DIRTY..