You absolutely don't need that many adjustment points, I don't even use all the 21 I have now. How many breaks do you think a v.e. curve has? There is maybe 5 or 6, so 21 will take care of that no problem. I can show you hundreds of logs from different engine configurations with Perfectly flat afr's.

As for the I/O goes, some will not use half of what is available, but the really serious guys will use all of the input sensors, and a good chunk of the outputs, if they start to get creative. At least it is there if they need it.


No..... they don't! There is no setup tables in MoTec's software for knock control whatsoever. You get knock control on a MoTec by purchasing a J&S knock sensor, but this doesn't give you the ability to tailor your knock curves for each engine like the AEM.

 

Knock is always after the fact, and it isn't good for the engine, with knock control or without. If you're saying that the car is always going to be running on crappy octane then yes I would agree with you that is a useful feature in the sense that fuel delivery and timing can be retarded until you get better gasoline. AEM has knock restore which is nice, but as mentioned earlier, if the engine is consistently knocking, your problems lie elsewhere, outside of the EMS.

 

Well there within lies the problem. Street cars run pump gas, and with pump gas you can't guarantee the quality of the gas. It's obviously a useful feature or manufacturers wouldn't spend so much money using them on street cars.

Jason.

 

I doubt the manufacturer is going to warrant the engine if it was meant to run on 93 octane and the owner consistently uses a lower octane gasoline.

What I was trying to put across, which I suspect you completely missed, is that knock control is not meant to define the limits of the state of an engine tune, because knock control by its very definition (actually an oxymoron), is after the fact. Knock control is not going to save the engine if it keeps detting.

 

I didn't miss anything...you are right, knock control is a reactive feedback. The manufacturer has to warranty the car NO matter what octane you put in it. For one, they can't guarantee that any gas is of it's rated octane, two, they have no way of testing it. Do you think you could get 70AWHP with an EVO by putting a computer on it and re-tuning it if the manufacturer wasn't considering crappy fuel in their calibration? Of course they do, that is the whole point. They can recommend minimums, but they still have to cover warranty no matter what fuel you put in the car. Knock control is a safety thing, and the systems today can use it to determine the octane of the fuel you have and adjust the timing maps accordingly. Bottom line.....rather have it, than not!

Jason.

 

on an AEM what a/f can you run with an idle of 1000 rpm on 1000 cc injectors?

 

14.3 is what I am running w/o any problems.

 

Depends upon the engine and cam setup. On a stock supra with stock cams, I have had them idling at 700rpm and 16 to 1 afr. You put cams in the same car, and it needs to be in the 13's. Point is, afr isn't the limiting factor, it is the velocity maintained to allow leaner mixtures. Evo's are the same way, although they have larger cams than the Supra stock, I have easily had stock cars idling in the 15's. If you are wondering how well the injectors are controlled, 1000cc's are not a problem. 1600cc's are a bit more of a task, but that is why AEM makes an injector controller. Yet I have had no problems getting 1600's to idle a bit rich (in the 12's) and 1100 rpm.

Jason.

 

I love the MotecM800! I am currently using it on my 2004 EVO using the stock wiring harness. I am controlling my anti-lag with my intercooler water spray switch. Also, I have the Motec Mini Dash Display to see my parameters without using a laptop. And I am using the CAN interface to comunicate with my ABS computer to track individual wheel speeds and braking force, and G-force.

It's a awesome ECU, but if you can't afford it, the AEM will do just fine. I have tried them both. I prefer the Motec M800.

 

Here is the guy i use for mapping my M800. There some more info on there for the motec
http://www.dentistmapped.com/

 

motec better than aem, more features, suspension setup/monitoring.

sounds better too. Mo Tec. A ee mmm...

lol

if not suspension monitoring or tuning, aem is a cheaper yet hella good tuning choice, i think.