Watching with interest. I know the market is small, but I am one more in a very small pool I know. Looking forward to seeing the dynos.

 

+1. Another Series II owner interested in the results of the dyno...

 

Results of the Dyno were obviously not what i had hoped for. On the plus side, the car definetely has a much better throttle response and smoothness to it, which i'm told can be done in the tune but just won't show up in the dyno . However, as far as changes in HP or Torque, the Red line is the run before the tune, the blue line is the run after the tune .... you can see the run after the tune actually yielded a slight amount less HP and torque. The temp was about 10 degrees higher on the second run .... but i'm told the dyno computer adjusts for that to some degree, so it may have affected the results slightly. Either way, I was hoping for much more. The A/F ratio seem to drop a tad bit, but doesn't seem like much changed there either.



The cost of the ecu tune is 450, but it is supposed to include being able to send it back and forth as many times as needed for adjustments , you just pay the shipping. I'm going to send him these results and ask him if he thinks he can do anything additional to improve it if i send back to him. Obviously , this is not going to be a one time process, but hopefully, sending back and forth a few times will yield better results which i'm willing to do if dynotronics feels they can do better. I'm certainly hoping they can.



The car definetely runs better, however, the #'s on the dyno def do not show the #'s they said they could do. I will let you know his response after i send this to him.

 

pretty dissapointing imo, especially for a remote flashing service. Sounds like the 450 could have been better spent on a RB intake to get similar numbers without having to dick with the ecu. I dont think sending the ecu back and forth is going to yield any results whatsoever. They need an S2 on site, and flash, dyno, flash, dyno etc. I am still very confused on how the eff you are getting a legit tune. Sounds like me mailing my physician reports across the country for a prescription .... sure he might send me something that works, but i would rather be close by so that he can have a closer look and be 100% confident in what he is giving me.

 

Maybe they mistook the OMP tables for the fuel tables...

I wish I was joking, but I get the impression that some tuners, when working on an undocumented ECU, simply guess at what tables do based on what they look like.

 

so your results are exactly like mine.

Except that I can't see the picture of your dyno results, just a red x.

 

Wow, that is VERY Interesting and IMO reinforces Jeff superior knowledge on this subject that proper tuning won't work this way...

It is a lot of money to spend just for an imaginary butt Dyno 'feel'...that the car run 'better' what ever that means...

Thanks for doing the very hard yards

 

Redline was bumped to 8500 and top end limit was moved all the way to Neverland.

So, yes, something was done. Also, I saw some of the readings before and after from the changes in the tune (mixture was changed, for example)

I haven't managed to convince ART to provide the dynos with AFR on it (for the after) or the torque graph. With this second car coming back, I don't think I need to. We may try a little more when they have time.

Of course, my car is no longer completely stock and will ideally become less so as time goes by.

 

Go back to stock lol, even power wise the new tune looks worse than stock.

 

You have gone this far and the tuner needs to go farther. It will take some some experience with the rotary for them to make gains. Get some good engine data and ask them what they will do next to lean it out safely.

What future mods do you have planned? After you get some improvement here, you could add one thing at a time, like a straight thru midpipe.

 

Yes but he's paying for the tuner's tuition basically... Paying for this kind of service is ridiculous.

 

That is true, but we have all paid for someone else's education at sometime. If improvements come, it will be worth it.

I put $550 into my tune before I gave up. This is how far i got:

(both were done in 4th gear - it is a typo in the note that indicates 3rd gear)

 

Paying to get worse than stock tuning is still pointless. They should man up, refund him and get an rx8 for testing purposes.
Did MazdaManiac started tuning cars before knowing how to do it? We all like to question is integrity somehow but it looks like he's way ahead of most.

 

^ Appears my caution was warranted after all

 

In the S1 roms, the rev limiter is extremely easy to find. All RPM data is stored as a float, and 9000.0 only appears about four times when it isn't also immediately preceded by 8000 or 8500.

IOW, it takes about 10 seconds to figure out how to change it.

 

You guys have to remember that dyno results from two separate days are almost completely useless. Using the same dyno is good to some degree but not really. To get a honest look you would need to do many more runs on the same day before and after tune. I mean with a tune of this sort you really can't expect too much anyway.

 

What I think is peculiar is that the AFRs didn't really change at all, and it isn't close to optimal in either case.

True, the dyno results themselves are equivocal.

 

As far as it goes, those dips in the curve. You have them at 4100, 6200, and 7300...

Why are mine so much more pronounced than his? Is there a way to fix that?

 

Like i said and some above mentioned, not really sure how accurate the dyno is esp on different days, but it did have some positive effect on the car, you just cant see on the dyno.

I spoke with him today and after seeing the dyno he def feels he missed something on the A/F ratio. I don't know if that means he feels he calculated wrong or if he just missed it all together, but at any rate i'm sending back to him tuesday .... so , stay tuned for one more ! lol

 

no kidding about unifying these threads. Lets just stick to this one and let the others die. IT has both our dyno sets in it and we can work from here.

I guess I may try and talk to him tomorrow assuming I don't have to deal with an evacuation from the wildfires (20 miles from a fire that is 14 miles long, living in a rural area doesn't seem like it is that far to me).

 

While I commend the efforts on all fronts, this is discouraging to me to say the least.

 

Clearly, absolutely nothing was done to affect the fueling calculation - your AFR response is exactly the same as before you sent the PCM in.
Any perceived increases in drivability are purely psychological, short of any response from a fuel-trim reset, which tends to make the car feel snappier for a short while after a PCM reset.

 

Pathetic.

 

Sad but true... I'm losing hope fast.

 

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