Switch to internal logging on the EMS. You will get a lot more data. I would use that while you are on the dyno.

This post might be a little late .

 

So it has been a couple days since I went to the dyno, I have been really busy since then. And So, the dyno did not go well at all.

I went to the dyno with the above timing map at 23psi. I adjusted the AFR to 12.5-12.8 during spoolup and 12.0 after that, on the street, before I went to the dyno. The car felt REALLY CLEAN on the street. Dyno was a dynojet. So here is what went down...

1. The inductive pickup was not working, so I had no torque readings on the dyno. Not that big of a deal, but still....

2. The very first pull, the car was breaking up madstyle and shaking, all over the rpm range. This continued to happen through the entire session. THIS is what I mainly want to discuss.

Discussion of problem #2.

With AFRs as stated above, here is what I tried. So after the first pull I tried to remove some fuel to about the 11.3-11.5 range, this made it slightly worse. Then I tried leaning it out to about 12.5, this also did not make a difference. Now I'm on the fourth pull, I put afrs back to where they orginally were at the 12.0-12.1 range, except on this pull I decided to take out 2 degrees of timing across the whole map above 2psi (against everybody saying how low my timing #s already are). This cleaned it up.... but yet the whole time in the back of my head I kept thinking of all of you guys telling me how low my timing numbers in my map are. So, even though that run felt clean, the next run I added 4 degrees back into the map, so now I'd be at +2 degrees from my originally posted map (doing this based on everyone telling me my timing numbers are low already). This made the car breakup really bad all over the place. Side note, the car has been hovering around 440whp +/- 10hp through all these changes. Based on everyones suggestions through this thread and PMs, I tried anywhere from 3-6 degrees of timing at peak (23psi 4600rpm), ramping up to anywhere from 13-18 at 7500 (holding 23psi). The only thing that made the car felt clean, and made a nice smooth plot of horsepower, was the run with 2 degrees less than my originally posted map. So, after about 45 minutes and 18 runs of dicking around at 23psi, trying to make the car run clean with timing numbers everyone has suggested, nothing worked out . So with the last 15 minutes, my best friend (owner of the car) just said **** it and turn the wick up, so with these sad timing number I turned it up to 28.5psi and made 507whp uncorrected, and 517 sae corrected. Then we left, because I didn't want to make him pay for another hour to rent the dyno, when it wasn't going as expected, before I consulted with you guys, to get some insight.

On our way home I tell my friend to do some pulls. I turned the boost down to about 24-25psi, and we let it rip. It felt nice... Then I added some timing into it. Still felt nice. Then I brought the map to about where everyone said it should be, about 4 degrees at peak (24psi) and 16-18 degrees at 7500. Car still felt clean as hell, and faster . I pulled 2 degrees out of the map, just to be safe, and called it a night, so that I could get some input from yall.

Could this dyno be loading up the car more than the street? WTF was causing the car to break up so badly on the dyno, but not on the street? Car feels smooth and the AEM logs look nice (knock wise) at 20 through 28psi on the street???? I am so perplexed. I look forward to hearing from ya.

Thanks

 

it's hard to say what was cuasing those issues but keep in mind the dyno is trying to simulate the street, so if it feels good there and knock is in check, roll with it.

 

I agree totally. I just thought it was so weird with about 0-1 degrees at peak, and only about 10-11 at 7500, 23psi e85....these are 93 oct values. That is what is perplexing me.

 

tell me again why this car is on the AEM EMS?

 

Car was bought with it. Any reason not to be on it? It will be running 35psi + when the double pumper and cop is installed.

 

TTP dyno tuning results - 763whp - 595tq stock ecu speeddensity

Mellon Tuning evo sets stock-ecu mas world record

It appears that the list of reasons for using a standalone ECU in an EVO is fast becoming a very short list. If I bought an EVO with an AEM, it would be the 2nd thing I'd remove right after the wing.

 

It came with the stock ecu and I have access to a tactrix cable, so I'll keep that in mind. Back on topic though, I don't believe the AEM is the cause for my weird experience on the dyno. I haven't had any problems with the AEM with the car on the street, only the dyno.

 

What were your AIT's during the runs. If it was a very hot booth, I would check your AIT timing trims.

Sounds like Plugs and Gap. I tested every plug from a 7-9 projected and non. Different gaps on each one of them. So started the car really well, others did well under boost. My car is very happy with br8es @ .020

Your knock cal might need some work also. You might have been knocking and your knock cal was pulling timing and adding fuel causing the problem to get worse.

Also it would help if you posted up your AEM logs. They will tell the story much better than a description.

 

it doesn't seem to be setup/tuned correctly if you're running dismal timing/boost and having issues

 

Car is fine on the street. He went 11.5x at 124.x with 19.5-20psi. The logs were free of knock the whole night at the track. I only had issues with the car breaking up on te dyno. Same map that did that on the dyno, felt fine on the street.

 

was at pinks all out this past weekend. Representing the ONLY import there! Based on my problems on the dyno, and almost every e85 timing map I've checked out on evom, these are the current timing numbers the car runs, I didn't want to go any further until I get some input on the knock voltage logs. It does not go past 28.5 psi. It has had about 40-50 runs at the track with these settings at anywhere from 20-28 psi for the past week while we where setting up the car for pinks all out. I finally have some logs, and I wanted to see what you guys thought about the knock sensor readings. KNOCK #1 has 1 spike of 1.01 volts on one of the logs, and only .56 volts on the other run. Most/if not all other logs show little to no KNOCK #1 voltages. Tell me what you think of these logs and the timing map. The first log is an 11.2x run at like 128 with 25-25.5 psi. The second log is an 11.502 @119 with 19.8-20psi of boost. I will repost the knock cal file. Thanks.



knock cal (done by AMS i think)



Knock #1 is turquise in both logs

11.20 run 25psi


11.50 run 20psi

 

No one who uses AEM has anything to say about the logs? specifically about the knock signal? I just want to make sure its ok.

 

the graph at 27.20psi is about identical to the timing i run on mine. I think you're good. the 20# trace on that map looks dangerous for e85, but if you had it on dyno and it was making more power per degree added then clearly the car wants it...... mine is over mbt after 1* at peak.