Honda Prelude Online banner

AEM engine Management review!!

1.8K views 16 replies 7 participants last post by  DirtyLude  
#1 ·
I was talking to the guy DeAngelo at R&D in California today and I was asking him about engine management systems. Well I told him that I was torn between the AEM unit(I wanted to try it but wasn't sure because of how new it was), or the Hondata system which lots of people use and like. Well he told me that his whole shop is running with the new AEM Engine Management systems and he said they are better than the MOTEC systems and also about 1/3 the price. He loves them!!! So I figure if a man that builds engines all day long and can get a N/A H22A motor to do 10's has got to know what he is talking about. He said that he can get them for about $1,800 and change. Pricey but well worth it if the big dogs like it!!
 
#2 ·
I believe that only their race systems are out for the time being. I'm not sure when they plan to release their street systems (aka those with creature comforts). Supposedly these will have the ability to control ATTS if they can figure it out, but that's a long shot. Though, their systems do have a nice spec sheet, and they seem almost as plug and play as the Power FC.

~Doug
 
#3 ·
and he said they are better than the MOTEC systems
He has no idea what he's talking about.

Also don't get ripped off. Apparently Summit Racing sells it for $1126.00 shipped if you call them up. Otherwise it goes for $1300.00 street price from other people trying to cash in.

http://www.groupbuycenter.com/buy.asp?row_id=4328
 
#6 ·
What's the Difference Between the two Systems? Practically Nothing...
We want to stress that the functions and features of both the AEM Plug & Play, and AEM Race systems are virtually identical. The difference between them is that the Race System utilizes a universal plug and has no preprogrammed inputs or outputs, and the Plug & Play System uses a vehicle-specific plug that connects to the factory wiring harness, and has preprogrammed inputs and outputs for the factory sensors. Plug & Play Systems will only be limited by the number of pin outputs provided by the factory, however it will accept additional inputs and outputs and has all the capabilities of the Race System.
Like I said, don't get ripped off and pay $1800.00. If you're spending that kind of money you need to research the product some.

And don't think in anyones wildest fantasies that it's "as good as" the Motec systems.
 
#7 ·
Dirtylude: Your statement is almost as careless/unresearched as his; do you really know that much about the AEM system?

How can anyone have been using this system for any length of time? The thing was supposed to just be released this month, and a distributor I've been talking to still can't get his hands on them. Have they really been available for that long?
 
#9 ·
In fact I do. The AEM system is an updated and repackaged GEMS system. http://www.gems.co.uk/ You can even see the GEMS name in the file names in the AEM demo. Which point are you trying to say is wrong? Don't pay $1800.00, or don't think it's as good as the Motec systems.

I've learned enough about the special lengths Motec goes threw with their electronics to ensure exact timing and control on their systems to know that AEM isn't going to care about that high a standard. Some of the people on the EFI lists have been putting out some good information on the electronics behind their systems mostly to see how other ECU's measure up.

There are beta testing units of the AEM system out there that people have been using.
 
#10 ·
DirtyLude said:
In fact I do. The AEM system is an updated and repackaged GEMS system. http://www.gems.co.uk/ You can even see the GEMS name in the file names in the AEM demo. Which point are you trying to say is wrong? Don't pay $1800.00, or don't think it's as good as the Motec systems.
I wasn't trying to say anything was wrong, I was trying to point out that your statement was as cocky & baseless as the other guy's was unfounded. You didn't give any other info to corroborate that in that first post.

What do you know about GEMS? They have a flashy enough web site, I'd be interested to see what they have available, if AEM is actually doing any development, and how their system *really* compares.

I'm betting if AEM is repackaging, they aren't spending much on development. I can't speak for GEMS, though- I'd be interested to know what they are involved in, racing-wise.
 
#11 ·
So, the information wasn't wrong, but it was "cocky and baseless"? I don't tend to give long posts with information backing up all my claims, but I can guarantee it's not baseless (though maybe cocky). In that case Billy's post would also be "cocky and baseless".

GEMS is known for their rally support and work, but I have no idea of what cars they support. The GEMS ECU is a pretty standard ECU. The big reason I assume AEM grabbed it up is because all of the sensors and inputs are configureable. That way it takes nothing to use OEM sensors other than just redifining the system with the tuning software. It also supports multiple trigger types with an on board reluctor adapter so that it can be configured to run on almost any car. I've talked to people who have installed them and it's pretty much flexibility and ease of install that makes them worth getting.

I couldn't find out what processor they are using, but the 32/16bit hybrid advertisement isn't promising. Motec uses the 68332 which has a dedicated built-in processor (TPU) to handle time critical processing and they seperate trigger input into a different module instead of trying to support everything on one system.
 
#12 ·
DirtyLude said:
So, the information wasn't wrong, but it was "cocky and baseless"? I don't tend to give long posts with information backing up all my claims, but I can guarantee it's not baseless (though maybe cocky). In that case Billy's post would also be "cocky and baseless".
Yes, but you posted first and I can *****-slap Billy in person when I see him. :)

The GEMS/AEM system interests me since it uses the Honda sensors. The installation should be much easier and utilizes Honda components; the Motec is about as far from plug and play as you can get. While this may not be a consideration for you, it is for a lot of other people (agreed it doesn't make it "better," though).

I couldn't find out what processor they are using, but the 32/16bit hybrid advertisement isn't promising. Motec uses the 68332 which has a dedicated built-in processor (TPU) to handle time critical processing and they seperate trigger input into a different module instead of trying to support everything on one system.
The 332 is a wonderful processor and the TPU was a great thing for Motorola to implement on the chip. It's not the end-all, and with good programming it doesn't have to be a limiting factor to not have it.

Also, AFAIK the 332 is a 16/32 processor itself. It's been a long time, I'll have to look at the data sheet, but I'm pretty sure it is. I think for this it's somewhat irrelevant... I could care less if they use a 186 as long as the software works right. You've obviously looked at the software, what do you think of their mapping ability?
 
#15 ·
Actually the Motec M4 works the same as the GEMS/AEM. All it's sensors are configureable and it's mapping load and rpm points are also defineable so you can use it with sensors other than the standard GM sensors. The GEMS/AEM system does not have as many cells as say the Haltech or Hondata system, but the defineable map points is a nice feature that allows you to give the best resolution where you need it. The Motec M4 series will hook up directly to a Honda with all the stock sensors and triggers as well. I even have a Honda trigger wire map and setup diagram for the M4/8 series from Motec.

All in all, the software looks nice. There's very few extras that I would like in it. Manual Trim control for boost solenoid, fuel, ignition would be nice. It's very helpful when tuning and when long cruising you can just twist a knob to run it leaner than usual for a while. Throttle pump, auxilliary fuel pump, and staged injection. There were temp control outputs, but they were both based on ECT, which means no intercooler fans or switches. The tuning software is pretty complex and not very intuitive, but it's hard to make its simple with so many configureable options. I couldn't find the traction control options in the software, but they must be there somewhere.

If this thing was available 6 months ago, I pretty certain I would have gotten it instead of the E6K. For $1200.00, it's a pretty good deal.
 
#16 ·
DirtyLude said:
Like I said, don't get ripped off and pay $1800.00. If you're spending that kind of money you need to research the product some.
Regardless of how similar they are, the race version does cost $400 more than the PNP version. Considering most people are selling the PNP for around $1400, $1800 is a perfectly good price for the race. From reading other boards, it looks like the summit price will not last, so expect around $1300-1400 for the PNP version unless you have a hook-up.
 
#17 ·
The extra expense of the race system would be for the wiring harness and the sensors. I'm assuming Delco IAT, ECT, and TPS are included with it (it doesn't say). If you want to pay $400.00 more for that, go ahead. I can tell you that replacing the engine harness with their's will be very difficult to do and maintain functionality of the stock gauges. It's much easier to hack into the stock wiring harness and if you're going to do that, just get the PnP version for $400.00 less.

As far as I can see the Race system is only usefull for cars that aren't supported and for $1800.00 I'd still go with the Haltech over the AEM Race.