Well, I finally got around to setting up an appointment to get my car dyno'd today, as I want to get a baseline number before I start doing some power adders (I should be recieving my AEM cai next week.) I am also going to be using Hymee's scanalyser so I can also get an idea of airflow and other things going on.

I will post results here later on.

so, how'd it go?

how did it go? What flash are you on? Are you stock?

well, i am not sure what is going on, and i am very not happy with the numbers i put down.

to begin with, i have an 04 gt, bone stock, with 18k on the clock. i wanted to get some baseline numbers so i could get an idea of what each mod does for me. my first mod being the aem cai. as to flash, it is either p or r, not sure exactly as the service writer couldnt read the tech's handwriting, and i am not too worried about it as i am going to get reflashed next week with the first recall. (heat)

now, the shop i went to is car version 2.0, in wilmington, de, and they are a reputable shop, and one of my really good friends works there part time.

well, just as i get there, they are pulling out the civic hatch that they just dyno'd and had me pull in, and proceed to do set up (using a dyno pac). get me all set up, i make sure that dsc is disabled (press and hold for like 10 secs, make sure front wheels are straight) and off we go.

now granted, temp was pretty high, with a relatively high humidity as well. im not sure about humidity, but temp was about 100. now, i will let the numbers speak for themselves, but i seriously think something was way wront, as the n/a civic that was in before me posted about 160 hp.

http://home.comcast.net/~lurch519/dynoplot_8132005_stock.jpg

anyway, i am going to be talking to my friend that works there and see what he has to say about it.

stuck shut 5 & 6 ports sleeves?

hmmm, might be a possibility, but i havent really noticed a lack of performance, i can still chirp 3rd on command, though if i remember correctly, they are vacuum actuated and they did have to hook up a vacuum line for the dyno pull

Something's not right.............

that's a weird-looking power curve if I've seen one...

What gear did you run the dyno? Can't be that your torque curve ran downward with the engine rev???

get a refund from the dyno, their shit is f*$*ed up.

i am pretty sure their dyno isnt f'd up, as they had just got done doing a couple pulls for an eg civic hatch that had a swap done, n/a, and that made like 160 to the wheels, either something wasnt hooked up right, calibrated right, or i have an issue with my motor. i am pretty sure i do not have an issue with my motor (at least as big as this would make it seem) as that same day i chirped 3rd with the ac running.

i gotta sit down with my friend, as he is a master mechanic for lexus, plus works there part time, and has a 350+ hp turbo eg civic and is going to be putting a full race kit on the car. i am sure that he will help me figure out what went on, and get me a much better price on subsequent dyno pulls.

very strange, but doesnt look like the power band from the dyno when the DSC is on, so it looks like its not the tcs/dsc problem they had with the early dynos..... very strange indeed. Did you get a wideband reading from this dyno...and what gear? Sounds like the car is running fine but the dyno just wasnt reading it correctly...almost seems like its off by 100hp

what was this vauum hose they hooked up? they obviously did not dyno you vehicle correctly. do they have the raw data and also how did they get the rpm. i bet they had it set up incorrectly. see they get the ingition signal and then they have the software turn that into rpm. but they have to use the correct math. they probably used the math from the civic pull which would not be correct.

its a dyno not using the correct calibration for a rotary.

first thought was its didn't get the right rpms... but the scale looks convincing

So either the load cell malfunction or perhaps you have the latest R flash and the some protection scheme in it makes the car dyno proof?

wait is this a DynaPACK as in one that bolts to the wheel hub?

http://www.dynapack.com/

^^thats it

zoom so what does that mean?

i know the dynapack bolts to the hubs and uses hydraulic fluid pressure to impose a load on the drivetrain and measure power. It should be a little higher since your not losing power to rotating the wheels and tires. That fits along with my guess that its off by 100hp even more. although thats just a guess, there is no scientific reason i think its off by 100hp..lol

it means im going to have a conversation with them so i can understand why it would be that off. :) stay tuned

thanks zoom. mucho appreciated. i was also logging data through hymee's scanalyser, though i havent really looked over it too much. i can send you the entire log if that may help determine what is going on

wow that torque curve is, um, interesting

hey corksport has a dynapack. ill email them.

I see that they are using the SAE correction method shown on the dyno graph. Are our cars rated using the SAE method from the factory as well?

:::::UPDATE::::::


I think i may have figured out the problem, read here.

http://www.rx8club.com/showthread.php?p=1008486#post1008486

:::::UPDATE::::::


I think i may have figured out the problem, read here.

http://www.rx8club.com/showthread.php?p=1008486#post1008486

that doesn't explain in the slightest how you didn't notice you were missing 100hp... :confused:

well that could do it. havent heard from dynapack yet. corksport doesnt use dynapack.

that doesn't explain in the slightest how you didn't notice you were missing 100hp... :confused:


but thats the really weird thing, i was still able to chirp 3rd with the a/c on. i dont know

see here to see what my cat looked like when they took it off, looks pretty bad.

http://www.rx8club.com/showthread.php?t=69617

that doesn't explain in the slightest how you didn't notice you were missing 100hp... :confused:

the temp in the cat. converter can affect the timing on the car, when he is moving down the street air flowing under/around the car....possibly the car is still warming up...the car might perform as normal...then you strap it on a dyno and run it a few times to redline with the car just sitting there...it wouldnt take long for the cat to get hot and pull timing and add fuel to cool things down....

although could the car really correct enough to lose 100hp?

i ran scanalyser during the dyno runs, timing was as advanced as about 36 degrees. cat temp got up to about 1600

here is a chart of the last dyno pull that i logged in scanalyser

http://home.comcast.net/~lurch519/scan_run.bmp

rpms and cat are left hand side, wideband is X 10000 on the left, air intake temp is on the right, as well as timing X 10, and maf

i see nothing.

here we go, sorry guys