nycgps

iTrader: (1)

Short intro : Went to Grand-Am @ Lime Rock this year yesterday, cool event, met some new people, nice race, even get to see the Miata rolled over couple of times and smashed that Mini. That Mini got that 1st place by pure luck (before both got hit) cuz the Miata was leading the whole freaking 2 hr race (almost) and the only reason he can take him out was another small accident happened a bit earlier, Pace car came out and everybody slowed down. Anyway, Good thing both drivers were ok.

Ok Main point ------ what happened was there was this "Dyno for Charity" thing going on. Its 20 bux for 2 pulls on Dynojet. not so bad I guess. Especially its for Charity so I mean why not? I was the first one to be there on Saturday so I pull first.

all the powertrain stuff was stock, the ONLY thing that's not stock is the flash, it's RB Stage 1.



Ok, this is ultra weird. I was like "wtf?" the whole time. I was expecting A LOT more than that.

Mind you all : This is actually the 2nd and 3rd pull, cuz on the first pull the Dyno can't read the RPM data after 6200 rpm. Totally gone. and the result was I am the KING of the Dyno for the rest of the day ------------- cuz the result was I got 2,000 FT lbs of Torque !!!!! oh yeah ! WHO SAID RX-8 is SLOW !?

ok enough bs so the 2nd and 3rd pull, the Dyno was STILL having issues with any RPM after 6,200, it was jumping all over the place (cuz it can't get the data), as shown in the pic.

I know some of you guys will be like "HAHAHA SUCKER NYCGPS UR CAR FREAKING SLOW AND RB FLASH SUCK!"

BUT -----

I'm not the ONLY car with this "Dyno Results", it seems that it happened to ALL and ONLY RX-8.

I got 162 hp (wtf) and I was (I think) the "highest" rx-8 hp for the day (correct me if wrong cuz I left b4 RWIWP pull his second time)

RWIWP Dyno'ed his car couple hours later, and it came back with almost the same result. And his car have AP with MM's 3rd(correct if Im wrong) calibration.

then another 8 with Stock tune came back with about the same result as well.

the only difference between the 3 was my car was running on the Lean side (15.x) most of the time. typical result with RB. Lowest was about 14.5-ish I believe.

AP was about the same, but a bit better, it was between 14.x to 15.x

Stock was pig rich. from low 15.x all the way down to 12.x when its around 8-9K rpm. which sounds right for stock tune.

RWIWP dynoed his car again today at different place, and he got 11 more hp than the run yesterday. Still low only 167 hp.

Will pulling the fuse effect results by "this" much?

or is it because the Dyno Location (the race track/park) was WAY above sea level ?

I dunno, maybe I should have another pull local, first pull leave everything the way it was, then second pull pull and reinstall the room fuse, then the 3rd pull with new air filter ?

9krpmrx8

iTrader: (46)

Hmmm.

A dyno is not 100% accurate, I know that for sure. My old Civic made 275WHP pretty much all day, every day, but I did a dyno day one weekend and only made 2-3 pulls at like 240-245WHP. It scared the crap out of me because nothing had changed so I went to another dyno and made 272WHP. Then a few months later we did a dyno day back at the same shop where I was getting low numbers and my results were back in the 270WHP range.

Flashwing

Stock ignition coils?

nycgps

iTrader: (1)

it was really weird, cuz after the Dyno we were like looking at each other with the same thing in mind , which was "NO FREAKING WAY"

I dunno, I'm gonna see if I can Dyno mine this coming week and post the results.


BTW, I'm KING OF THE DYNO ! I made 2,000 FT LBS OF Torque on my first run !!!!

nycgps

iTrader: (1)

it is stock, but its fairly new.

all 8s were like that. Funny RPM readings after 6,200 rpm.

on Stephen's pull, they just get rid of the rpm reading for Rx-8, cuz it's all wrong.

RWIWP's logged his pull with AP, he said everything looks fine. and he pulled another run today at somewhere else and he got another 11 hp instantly (still low tho)

04Green

iTrader: (1)

I seem to remember something about needing to disable DSC for a dyno, something with confusing the computer because 2 wheels are hauling ***, and 2 are stopped.

Flashwing

I've seen plenty of dyno plots that look that way due to ignition breakup but most of the time the breakup is above 8,000 rpms. There might have simply been an issue with their RPM pickup.

nycgps

iTrader: (1)

you have to turn DSC off to Dyno, or else the ECU will keep cutting power to the wheels cuz its "rear wheels are spining, but front is not ! CUT POWER!"

I dunno, I hope so. its funny cuz its just Rx-8 having this "weird" issue.

MS Addict

iTrader: (1)

I had my Mx6 on a dyno back before, which, running a distributor style ignition, not coils and all, and it was having a hard time picking up my rpm signal.

But then again, the ckp sensor went out on that run, go figure.

I know it's a different car and all, but still, dyno's mess up on occasion, or just aren't accurate, as said above.

Brettus

iTrader: (2)

saved me the trouble typing it .....

nycgps

iTrader: (1)

lets hope so ...

...

MS Addict

iTrader: (1)

Well, it rated my Mx6 at half it's horsepower, soo.... The dyno was all over the place, jumping like 30-40whp in an instant.

40w8

Yeah, those stock coils the OP loves so well are only good enough to sell the car.

You know they are gonna fail several times before the engine wears out, you just don't know when.

nycgps

iTrader: (1)

yeah, that's probably why someone with other coils at another place had the same number as me ?

hmm so should they just trash the car altogether ?

not to mention, my coils have lifetime warranty. hmm for 60 bux. can you find something that can beat that ?

This Dyno was having problem with RX-8 only, some other car had weird hp numbers as well. but we all were like "oh, its just 20 bux what the hell"

I had 2,000 ft lbs of torque on my first run.

Mazurfer

And they say that "Butt" dyno is inaccurate!
Jackson...............can I haz some of that first run torque please?


Dave

nycgps

iTrader: (1)

I should've told him to print that out lol ! I think I have the picture in my camera. I will post it up tonight hahahaha.

Flashwing

Lol, yep.

Nadrealista

I also own Audi S4 and the most accurate way we had for measuring whp was to log the 3rd gear run form 2k rpm to redline on flat road in both directions and average the results with use of the car weight, altitude and air temperature to get actual WHP.

here is example:


dyno is only good to lay a baseline for YOUR car and then check you results with upgrades...there is just to many variables that impact the results.

think about it..driving a car on the road is much more realistic than spinning wheels in the shop on simulated "road".

nycgps

iTrader: (1)

I don't think they had any corrections on the Dyno ...

Let's see what I can get from the Dyno this or next week.