sounds a lot like Manufacturing. You can't cut something on a CNC machine until you can tell it exactly where it is in the fixture and where exactly the fixture is in the machine. Otherwise you're just guessing about what the actual dimensions of the finished part will be.

All about finding out where something is in reality relative to "zero." :)

Yes - Finding "zero" is what this does.

I was always having to infer zero from the end results before, which is kind of like inferring the end of a book by the way the ink distorts the shape of the back cover.

wow, what an analogy. that explains a lot of the storyline with the AP tuning, which btw i'm glad you got things streamlined. see people, even MM learns as he goes sometimes. he isn't an evil artificial alien lifeform..... or is he:eyetwitch


back OT:

I've read bit and pieces of this thread and other dicussions about it dozens of times over the last couple of years. STILL the more i read, the more go in circles. In my mind i know i should be able to hop on a dyno, fully disable TCS/DSC and go at it. But at the same time i cant seem to accept it blindly like that. Maybe it's a lack of full understanding of what the PCM does in regards to torque sensors, traction, and wheel speed... is there a chance that anyone can really fully break it down? Any sections of any manuals that cover the flow/logic diagram or whatever the PCM uses? I have most of them afaik but i havent seen anything obviously related in my quick skimming...

Jeff, sorry - i don't intend to be asking you to step up and educate, but honestly i dont know who might know the in's and out's of the way the damn thing works as well as you

The two times I have put my car on a dyno I have simply turned off the DSC completely and it worked fine on both a 2 wheel and 4 wheel dyno. Dynojet and Mustang dyno.

No timing pulled and no weirdness from the PCM. Just do it.:lol2:

Go ahead and dyno it.

Dam I wish I found this thread before I dynoed my 8 lol back to the dyno

Upon dynoing my car - we received consistent hp numbers of less than 1 hp difference and all we did was hold down d.s.c. for the few seconds

as a matter of fact i had mentioned this thread to my tuner and he was curious, as was i, to find out if it is true, we looked through the rx8 dealer manual and find no tie to the abs cutting engine power - and as previously stated, numbers were consistent and no 'power loss' was evident.
_

my $.02

Street Driving with DSC/ABS fuse pulled = ?

this thread is bogus and doesn't deserve sticky status, I never did anything special for dynoing my car

/\ lol maybe not for your car but for mine it is. 164whp in all honesty sucks ass. Maybe my coils are finished...

well I have an 04 RX8 and have no DSC button and when I dynoed my 8 it was pathetic and on top of it all it was at a honda shop. My fuel was WAY rich my numbers didnt break 135hp and every light imaginable light up my dashboard like a christmas tree then once I pulled it off the dyno and drove it those lights went off. Then proceded to race and beat a car that dynoed before I did that showed 173hp on the same dyno. And I didnt pull the fuse either. So I will go back to this same shop pull the fuse and see what I get.

So I guess this never happened.

bump for the most tarded thread on the forum, except for maybe the aggressive wheel thread ...

Yeah, I can't believe we are still having this discussion.

If anyone doubts that there is NOTHING special needed to dyno the RX-8, watch the live video feed from the SoCal dyno day on the 27th and 28th of March.

or just be there and watch it in person

Even mo bettah.

Though, I suspect people will be sitting in your car watching "Blade Runner" or something....

We aren't . It's just that Team keeps posting in here .
But he does have a point ,the thread should be de-stickyed (if that is a word)

Something I have found with dynoing mine that might be useful :
Be carefull that there is sufficient airflow to the radiator . The guy that does mine insists on directing the fan into the intercooler and i have seen engine temps go awhol as a result .

That's because most dyno fans are woefully insufficient

Were, anyway.
A lot of the dyno operators are moving up to two or three of those high-velocity carpet-drying turbines.

:hahano:

for the 8 there should be one main fan directed at the radiator and perhaps 1-2 smaller ones at the oil coolers .
Next time i go for a big whp dyno I'll hire an extra fan to do the 2nd radiator

I guess it depends on the fans.
The carpet fans (usually just two pointed in the "mouth" at the IC and rad) they use at UMS here in Tempe actually over-cool the car if I'm not careful.
Its not unusual to see my coolant temps drop below the 175°F threshold between runs if I don't run them close enough together.
Oil temps simply wont go over 185°F or so no matter what.

"Oil temps simply wont go over 185°F or so no matter what. "

Good to know




The other issue is that dyno operators don't realise how hot our engines get before the gauge moves .

Yes I am going here, but no; I am not discussing "it".

Two and a half years and no one has managed to do just this? What ever happened to the Scientific Method? Leave the philosophical arguments out of this and just prove whether or not there is a difference between the two with results.

Unless someone has actually done this (and pending $150 I can rationalize throwing away), I will step up to the task sometime this year. My car is -- with respect to the "major horsepower upgrades" section -- very much unmodified; so I hope this isn't a worthless gesture for the sake of those using aftermarket systems. I have a Hymee sCANalyzer; would any data logging be useful for such a comparative test, or would the dyno sheet prove to be the only interesting bits of data?

So no absolute truth or difference in pressing the DSC button when dynoing... yes?

Un-sticky then....