Here in the Quebec Province, a lot of Road race team in GTO/GTU, Touring have been running AEM EMS on BMW, Civic, Integra, RSX, etc

but since about 2 month a those replace their EMS because they claims problem with it, on rough course and had a lot of bugs when accelerating

those who are running K serie Engine bought Hondata K-Pro, those on B serie : chipped their ECU with Uberdata and Crome, and those on BMW chipped the OEM ECU

some people here have the same problem

I take information before buying the EMS for the race car no choice between Hondata and EMS because it's a K20

thanks for your help

 

hi.

you should talk to the curpier guys who race here in the ECHC.... i think they used to use AEM, but have since switched to Hondata; they might have some input for you....

todd

 

Does he come on this forum?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Garrett &raquo;</TD></TR><TR><TD CLASS="quote">Does he come on this forum?</TD></TR></TABLE>

Yes, AdamITR. Also, I know of 2 other road racers with problems AEM related. That was one of the reasons I went Hondata.
I think John W. used the AEM EMS all last season with no problems, but I may be wrong.

 

&lt;----------Has had zero problems with road race AEM EMS applications

 

Yes, we have had some problems with our EMS unit. It has a consistant misfire issue.

Jack at P1 tuned my car early this season, and it had an ignition miss high in the rpm band. It wasn't the tuning. We replaced all the distributor components, etc. But couldn't find the problem. (That engine blew beacuse of a broken camshaft.)

Again, we tried the EMS on the next engine ... and it still had a misfire issue, from ~3500 to ~6000 rpm. We sent it to AEM for service, and they said it checked out okay on their test bench. When we got it back, the car still broke-up consistantly. When we swaped in Hondata ... the car ran normal.

With that said, we did run the AEM system the previous year in Pete's car. It was fine. Also, Kevin H. runs the AEM in his car ... and he has no problem at all. I think it's an isolated issue with my car ... but I'm running Hondata now, and the car runs much better

I was able to datalog some full throttle runs with my wideband software, I'll see if I can post up the charts.


Modified by AdamITR at 2:23 PM 9/11/2005

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AdamITR &raquo;</TD></TR><TR><TD CLASS="quote">Yes, we have had some problems with our EMS unit. It has a consistant misfire issue.

</TD></TR></TABLE>

Strange - matt (pollo diablo) was having similar problems last year, running the AEM EMS

 

Here are the charts. If you look in the yellow box on the AEM chart, you can see the weird ignition stuff happening.

Blue=RPM
Green=AFR
PINK=TPS

AEM Chart:



Hondata:



Note the normal RPM curve

 

Note ... the only differences in the above charts is the ECU ... that's it. They were done on the same day.

 

Try turning off the camshaft position sensor synch above 3k or so...that was my issue, and it's most likely caused by the distributor wiring, and not the AEM EMS.

It's loosing synch just long enough to retard the hell out of the timing, but still firing off the charge as seen by the AFR graph.

VERY similar to what mine was doing, except my "mysfire" went on from 6k to redline till we turned off the cam synch.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by El Pollo Diablo &raquo;</TD></TR><TR><TD CLASS="quote">Try turning off the camshaft position sensor synch above 3k or so...that was my issue, and it's most likely caused by the distributor wiring, and not the AEM EMS.

It's loosing synch just long enough to retard the hell out of the timing, but still firing off the charge as seen by the AFR graph.

VERY similar to what mine was doing, except my "mysfire" went on from 6k to redline till we turned off the cam synch.</TD></TR></TABLE>

It seem to be a large problems with EMS on the market

 

This particular problem? I'm pretty sure it isn't.

 

on the above charts what is the load doing, if something is wrong with the map signal (jumping around from noise or wiring issues) then your ignition output will jump around from cell to cell. Hondata probably has more filtering and smooths out the signal more while the ems is more sensitive. Check your map filter setting on the EMS.

I have been running Ems for a while now an love it. It catches a lot of flack because some of the software isnt as user friendly as it should be.

 

Jack at P1 built my motor, installed the AEM EMS, and tuned my car. I have no problems what so ever and I jump the curbs at CMP ever chance I get...enough to break the left wheel axle. Also, I've done some agricultural cultivating at VIR up past the ascending esses and after hog pen...still no problems. But, I may need to bring some plows with me the next time I go to VIR.

Maybe it you get Jack to build the motor, install the unit, and tune the car you may not have the problem....just a thought.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by J28S &raquo;</TD></TR><TR><TD CLASS="quote">Jack at P1 built my motor, installed the AEM EMS, and tuned my car. I have no problems what so ever and I jump the curbs at CMP ever chance I get...enough to break the left wheel axle. Also, I've done some agricultural cultivating at VIR up past the ascending esses and after hog pen... </TD></TR></TABLE>

Whoa, you are back on track?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by .RJ &raquo;</TD></TR><TR><TD CLASS="quote">

Whoa, you are back on track? </TD></TR></TABLE>

Yea, in a EP car =~P I guess he doesn't like competition (H1)

 

the problem is the mag pickups honda uses are junk. if there is not a "perfect" signal coming into the ems it will not fire. I run into this alot, expecially at high rpms. we normally move to a hall effect setup with magnets in the cam gear.. completly resolves this problem. the hall effect sensor is not effected by heat or interference. They use a 12v square wave.

not sure if that is legal in HC... if i remember right the rules say it has to be fired through the stock distributor?? if so you can do that with this setup and the ems.

 

Not road racing but my friend's turbo LS motor blew because of the AEM EMS failing to regulate boost. One day it just decided to let the boost run wild instead of holding it at 7psi... boosted up to 2 bar and KABOOM. When he got a new engine and had it all tuned again he ran off the wastegate spring, but then he kept having problems with something else on the EMS blowing out, damn I forget what they were called.

 

Yep, I'm back...just doing some fine tuning and experimenting with some different set-ups. As you can see, some set-ups don't work as well as others....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by White98LS &raquo;</TD></TR><TR><TD CLASS="quote">Not road racing but my friend's turbo LS motor blew because of the AEM EMS failing to regulate boost. One day it just decided to let the boost run wild instead of holding it at 7psi... boosted up to 2 bar and KABOOM. When he got a new engine and had it all tuned again he ran off the wastegate spring, but then he kept having problems with something else on the EMS blowing out, damn I forget what they were called.</TD></TR></TABLE>

why didnt he have the fuel cut set

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by White98LS &raquo;</TD></TR><TR><TD CLASS="quote">Not road racing but my friend's turbo LS motor blew because of the AEM EMS failing to regulate boost. One day it just decided to let the boost run wild instead of holding it at 7psi... boosted up to 2 bar and KABOOM. When he got a new engine and had it all tuned again he ran off the wastegate spring, but then he kept having problems with something else on the EMS blowing out, damn I forget what they were called.</TD></TR></TABLE>

Sounds like a tuner problem...

 

in facts, Hondata will be safer than the EMS

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Garrett &raquo;</TD></TR><TR><TD CLASS="quote">in facts, Hondata will be safer than the EMS </TD></TR></TABLE>

no.... either system is only as good as the person that tunes it

i rarely see problems with the ems, most problems are casued by crap wiring jobs or **** tunes. i have MANY customers that run ems on their daily drivers and have over 20k miles on their car w/o a hitch

 

Katman has very good points in his post...

Adding to them. the AEM Pro RWD drag civic accelerates pretty fast in a strait line (low 6 sec @ around 213mph). Those drag strips ARE not perfectly flat, I dont think the bumpiness is messing with it!

 

Special appearance by Styles and Katman. Now we just need Merrit, Spikey and Nakano!

hahahaha