STOCK BOOST and 403 at the wheels...
I'm not sure where it was on EvolutionM, but someone was saying that the defalt dwell time on the AEM EMS is too long for the stock Mitsu coils and they were able to get much better results with a shorter dwell time..... could you experiment with that next time you dyno and let us know how it goes?
Keith
Keith
Originally posted by MMLVMM
Actually the AEM TECH said that not my tuner... This problem exists with the aem ecm- that is the point... It is occuring on the aem with supras according to the tech and I have 3 other tuners finding this to be true with the aem. The fact that you probably want to upgrade the ignition if your going with the aem is not necessarily a bad thing... you probably should be if your modding the car enough to make the aem worth it.
Stand alones are never for the faint of heart and piggyback vs flash vs standalone depends on what you are willing to do to the car... The aem can be made to run as good as stock though with proper tuning. See what Tim at Burshur or RRE comes up with for example. Once this baby is dialed in you will see a lot more of them.
As others have said, not for everyone... are you going to do headwork or internals or be willing to invest in dyno time for instance...?
Actually the AEM TECH said that not my tuner... This problem exists with the aem ecm- that is the point... It is occuring on the aem with supras according to the tech and I have 3 other tuners finding this to be true with the aem. The fact that you probably want to upgrade the ignition if your going with the aem is not necessarily a bad thing... you probably should be if your modding the car enough to make the aem worth it.
Stand alones are never for the faint of heart and piggyback vs flash vs standalone depends on what you are willing to do to the car... The aem can be made to run as good as stock though with proper tuning. See what Tim at Burshur or RRE comes up with for example. Once this baby is dialed in you will see a lot more of them.
As others have said, not for everyone... are you going to do headwork or internals or be willing to invest in dyno time for instance...?
EvoM Guru
Joined: Apr 2003
Posts: 559
Likes: 0
From: D/FW, TX
Am I talking to the wall over hear? You respond to stupid pot shot remarks, I ask some legitimate ??? and offer some real possabilities and get ignored. What's up with that?
This is basically what I was trying to tell you:
I don't buy the upgraded ignition theory either, for example I have seen many Supras making way, way over 400WHP on the stock ignition system. Who exactly at AEM told you this?
Not that I think your lying, I just know from experience that if you get on the phone with the wrong person from any given company you can get a lot of bad information.
What plugs are you using and what are they gapped too?
What air fuel ratio are you running?
I don't have experience with the AEM or this dyno so..., but when I have run into ignition missfiring under high loads in the past, the power output/dyno graph was far more eratic/abrupt compared to what I am seeing here.
This almost looks like the AEM is making adjustments possibly due to the knock correction or possibly eratic boost control?
What do the data logs show?
The stock EVO coils actually have the igniter built into the coil, so an aftermarket ECU cannot put an amplified signal into the coil and burn it out. From what I understand, the problem with the emange happened because with the ignition on and the engine not running they were byassing the igniter on all the time. So if you left the ignition on with the engine not running for more than 15 seconds it would burn up the coil. I do not believe any of the other ECU systems have this problem. Coil charging should just be a matter of adjusting the timing.
BTW, the reason the torque and HP do not appear to cross at 5252RPM is because the TQ/HP graphs are scaled differently. If you look at the TQ/HP values at 5200 RPM you will see that they are in fact the same.
What air fuel ratio are you running?
I don't have experience with the AEM or this dyno so..., but when I have run into ignition missfiring under high loads in the past, the power output/dyno graph was far more eratic/abrupt compared to what I am seeing here.
This almost looks like the AEM is making adjustments possibly due to the knock correction or possibly eratic boost control?
What do the data logs show?
The stock EVO coils actually have the igniter built into the coil, so an aftermarket ECU cannot put an amplified signal into the coil and burn it out. From what I understand, the problem with the emange happened because with the ignition on and the engine not running they were byassing the igniter on all the time. So if you left the ignition on with the engine not running for more than 15 seconds it would burn up the coil. I do not believe any of the other ECU systems have this problem. Coil charging should just be a matter of adjusting the timing.
BTW, the reason the torque and HP do not appear to cross at 5252RPM is because the TQ/HP graphs are scaled differently. If you look at the TQ/HP values at 5200 RPM you will see that they are in fact the same.
This is basically what I was trying to tell you:
I'm not sure where it was on EvolutionM, but someone was saying that the defalt dwell time on the AEM EMS is too long for the stock Mitsu coils and they were able to get much better results with a shorter dwell time
Not that I think your lying, I just know from experience that if you get on the phone with the wrong person from any given company you can get a lot of bad information.
dude relax, you voiced your opinion/advice. Leave it at that. Plus you dont even have the EMS on your car so your true experience is limited. At least I think you dont have it on your car.
Thread Starter
Evolving Member
Joined: Jun 2003
Posts: 174
Likes: 0
From: santa monica
I'm not sure where it was on EvolutionM, but someone was saying that the defalt dwell time on the AEM EMS is too long for the stock Mitsu coils and they were able to get much better results with a shorter dwell time..... could you experiment with that next time you dyno and let us know how it goes?
Keith
Keith
As to plug gap etc. tried denso and bosch, crossfire plugs and stock plugs + changing the gap and it wasn't doing it.
Regarding the a/f and boost- stock boost and 10.8 on the a/f. I know the engine will be fine with the stock ignition but the aem doesn't seem to work with it. It is a trigger or software issue I think...
In any case, I will be dynoless till the end of next week holiday and all...
Thread Starter
Evolving Member
Joined: Jun 2003
Posts: 174
Likes: 0
From: santa monica
What plugs are you using and what are they gapped too?
What air fuel ratio are you running?
I don't have experience with the AEM or this dyno so..., but when I have run into ignition missfiring under high loads in the past, the power output/dyno graph was far more eratic/abrupt compared to what I am seeing here.
This almost looks like the AEM is making adjustments possibly due to the knock correction or possibly eratic boost control?
What do the data logs show?
The stock EVO coils actually have the igniter built into the coil, so an aftermarket ECU cannot put an amplified signal into the coil and burn it out. From what I understand, the problem with the emange happened because with the ignition on and the engine not running they were byassing the igniter on all the time. So if you left the ignition on with the engine not running for more than 15 seconds it would burn up the coil. I do not believe any of the other ECU systems have this problem. Coil charging should just be a matter of adjusting the timing.
What air fuel ratio are you running?
I don't have experience with the AEM or this dyno so..., but when I have run into ignition missfiring under high loads in the past, the power output/dyno graph was far more eratic/abrupt compared to what I am seeing here.
This almost looks like the AEM is making adjustments possibly due to the knock correction or possibly eratic boost control?
What do the data logs show?
The stock EVO coils actually have the igniter built into the coil, so an aftermarket ECU cannot put an amplified signal into the coil and burn it out. From what I understand, the problem with the emange happened because with the ignition on and the engine not running they were byassing the igniter on all the time. So if you left the ignition on with the engine not running for more than 15 seconds it would burn up the coil. I do not believe any of the other ECU systems have this problem. Coil charging should just be a matter of adjusting the timing.
Mark from Quantum Racing is where I got the aem uego and he is taking care of it without any hesitation btw.... very professional! He has been running a non evo converted aem ems box for sometime on his evo and he mentioned the spark scattering also...
Final note, the tech's name at AEM is Josh...
EvoM Guru
Joined: Apr 2003
Posts: 559
Likes: 0
From: D/FW, TX
Sorry if I came off harsh and uptight. I was being pressured to get off the computer earlier 
,so I was kind of in a hurry and not paying attention to my wording.
I think the AEM is a nice system, but I don't have one, and I have no vested interest in it doing well or not. I have wrestled with ignition issues on other projects so I kind of find the subject interesting.
I just don't see why the AEM cannot fire off the plugs properly under higher loads with the stock ignition system, when the stock ECU seems to be able too. It just seems to be a shame to have to replace the entire ignition system due to a bug in the AEM, if that is in fact what it is.
Anyway, I will be interested to see how it all turns out, thanks for sharing.
Good luck with it,
Eric
,so I was kind of in a hurry and not paying attention to my wording. I think the AEM is a nice system, but I don't have one, and I have no vested interest in it doing well or not. I have wrestled with ignition issues on other projects so I kind of find the subject interesting.
I just don't see why the AEM cannot fire off the plugs properly under higher loads with the stock ignition system, when the stock ECU seems to be able too. It just seems to be a shame to have to replace the entire ignition system due to a bug in the AEM, if that is in fact what it is.
Anyway, I will be interested to see how it all turns out, thanks for sharing.
Good luck with it,
Eric
Newbie
Joined: Oct 2003
Posts: 82
Likes: 0
From: OXNARD
Hi MMLVMM,
Congrats on your new power increases, and would like to thank you for continued RPS Clutch support
.
And also would let everyone know that the RPS Max (2900lbs)Pressure Plate with a street disc, 6 Puck Sprung, and or 5 Puck Sprung will be available next month. Thanks
Congrats on your new power increases, and would like to thank you for continued RPS Clutch support
.And also would let everyone know that the RPS Max (2900lbs)Pressure Plate with a street disc, 6 Puck Sprung, and or 5 Puck Sprung will be available next month. Thanks