I agree with the AEM EMS statement to a point: it's only as good as the person that is tuning it. In the hands of someone competent, it really is the best option.
AEM EMS is not going to give you any more power than any other decent tuning method
Not true.
The AEM has several features which OBD1 derived S/W does not. I know because I've tuned Uberdata, Crome, and the AEM personally on my own car. These are:
(1) Gear dependant wastegate maps (Neptune has this also). Allows different boost targets for each gear (traction).
(2) Direct fire ignition drive for COP. OBD1 can't do this. COP yeilds very nice improvements at the very top end.
(3) Battery voltage compensation. Sounds silly, but at high loads, the car's supply voltage will drop slightly. The AEM measures the voltage, and compensates the fuel injector duty cycles.
(4) Fuel injector offset timing. This one is the hotness. The AEM has a 2D map which is an offset (in ms I believe) from when TDC is reached (used repetedly for each cylinder). It delays the fuel injector open time until the offset has passed. This allows the fuel to be sprayed only when the intake valve is actually open (at low loads). At high loads, there isn't much tweaking room. User JDogg is an expert AEM tuner, and he has picked up as much as 10% power in the midrange by tuning this parameter. Also, it helps tremendously at idling large injectors, and low-throttle fuel economy.
Granted, you need a tuner that can tune all this. I have a low opinion of any AEM tuner who can't, since I was able to do this myself. It requires a few hours street tuning, and a few more at WOT on the dyno.
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ok this is kind of retarded to say, but i know nothing and i'm admitting it. Someone mentioned 2 me that i can just use the vafc that i have to tune the fuel on the car when its boosted FOR THE TIME BEING until i can afford a crome hondata or aem or whichever.
No, don't do that. A VAFC is a crappy way to do it. You'll have crappy fuel control with only a handful of programmable points, you will have no ignition timing control, and it will in fact advance your ignition timing under certain conditions.
ok this is kind of retarded to say, but i know nothing and i'm admitting it. Someone mentioned 2 me that i can just use the vafc that i have to tune the fuel on the car when its boosted FOR THE TIME BEING until i can afford a crome hondata or aem or whichever.
What Shark said. There was a really awesome thread on H-T about why the hack sucks, but I can't find it for the life of me.
Also, there's a lot of good info on the Honda-Tech sticky:
so wait, why did you go with hondata, you could have easily gone with CROME and saved $400..
you are going to need a wideband for sure, atleast for monitoring on your part, even if you don't tune the car.. I would recommend a Zeitronix ZT-2, which I bought, after much research.
The AEM has several features which OBD1 derived S/W does not. I know because I've tuned Uberdata, Crome, and the AEM personally on my own car. These are:
(1) Gear dependant wastegate maps (Neptune has this also). Allows different boost targets for each gear (traction).
(2) Direct fire ignition drive for COP. OBD1 can't do this. COP yeilds very nice improvements at the very top end.
(3) Battery voltage compensation. Sounds silly, but at high loads, the car's supply voltage will drop slightly. The AEM measures the voltage, and compensates the fuel injector duty cycles.
(4) Fuel injector offset timing. This one is the hotness. The AEM has a 2D map which is an offset (in ms I believe) from when TDC is reached (used repetedly for each cylinder). It delays the fuel injector open time until the offset has passed. This allows the fuel to be sprayed only when the intake valve is actually open (at low loads). At high loads, there isn't much tweaking room. User JDogg is an expert AEM tuner, and he has picked up as much as 10% power in the midrange by tuning this parameter. Also, it helps tremendously at idling large injectors, and low-throttle fuel economy.
Granted, you need a tuner that can tune all this. I have a low opinion of any AEM tuner who can't, since I was able to do this myself. It requires a few hours street tuning, and a few more at WOT on the dyno.
(3) - CROME now has injector battery offset along with ECT idle/fuel comp, ECT ignition/fuel correction, IAT ignition/fuel correction, and other combinations dealing with idle, + much more.
(4) - I'm sure this is possible with a script in CROME..
For a street car, I think I would stick with a $75 set up(chipping supplies/programmer) instead of an AEM EMS $1000+?
For a street car, I think I would stick with a $75 set up(chipping supplies/programmer) instead of an AEM EMS $1000+?
For Hondas, you can get an AEM EMS for around $800. I didn't argue that the AEM is the best value, it isn't (Neptune has that honor). It does have the most flexibility, and will ultimately make the most power, period. I have tuned both the AEM and Crome, and I know where the differences are.
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For Hondas, you can get an AEM EMS for around $800. I didn't argue that the AEM is the best value, it isn't (Neptune has that honor). It does have the most flexibility, and will ultimately make the most power, period. I have tuned both the AEM and Crome, and I know where the differences are.
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along with ECT idle/fuel comp, ECT ignition/fuel correction, IAT ignition/fuel correction, and other combinations dealing with idle, + much more.
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