Hondata or Zdyne
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Honda-Tech Member
Joined: Dec 2001
Posts: 1,568
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From: Filthadelphia Area, PA, USA
Re: Hondata or Zdyne (breaka_1_9)
I'm going to be the outcast and say to use the AEM EMS with an obd-0 to obd-1 conversion harness. I've had both the obd-0 and obd-1 hondata on my 88 crx turbo B16 and I was not impressed. I got the 4b cause I figured I would need to tune on my own. Then I bought a wideband.
On all the cars that I've tried the 4b on that came after '92 the system worked like it is supposed to. I was able to datalog air/fuel ratios according to thier position on the fuel map and make adjustments accordingly. When I set everything up in my car I found that no matter what I did the hondata program wouldn't read the correct voltage from the wideband and therefore wouldn't datalog correct air/fuel ratios making it very difficult to tune. I was advised by a hondata dealer that it was because of it being an obd-0 ecu, the pr3 in particular. So, I made the switch to obd-1 and the same thing happened. It appears that there is a significant ground loop in the factory wiring that I couldn't find that caused the readings to be way off. I never got any significant help from hondata and in the end decided to change systems. The only way I could see to make the system work like it was supposed to in my car would have been to rewire the entire car with custom harnesses. There have been a few others that have the same problem. Their names on here are true and slowteg. To my knowledge they have not found a fix to the problem yet.
The aem also sees the wrong voltage but has a gain function that allows you to trim the voltage to make the computer think it is seeing the correct voltage. So far I have been very happy with what the aem can do.
On all the cars that I've tried the 4b on that came after '92 the system worked like it is supposed to. I was able to datalog air/fuel ratios according to thier position on the fuel map and make adjustments accordingly. When I set everything up in my car I found that no matter what I did the hondata program wouldn't read the correct voltage from the wideband and therefore wouldn't datalog correct air/fuel ratios making it very difficult to tune. I was advised by a hondata dealer that it was because of it being an obd-0 ecu, the pr3 in particular. So, I made the switch to obd-1 and the same thing happened. It appears that there is a significant ground loop in the factory wiring that I couldn't find that caused the readings to be way off. I never got any significant help from hondata and in the end decided to change systems. The only way I could see to make the system work like it was supposed to in my car would have been to rewire the entire car with custom harnesses. There have been a few others that have the same problem. Their names on here are true and slowteg. To my knowledge they have not found a fix to the problem yet.
The aem also sees the wrong voltage but has a gain function that allows you to trim the voltage to make the computer think it is seeing the correct voltage. So far I have been very happy with what the aem can do.
Brrraaaap!
Joined: May 2002
Posts: 3,950
Likes: 3
From: AZ
Re: Hondata or Zdyne (racerxadam)
Zdyne you can adjust on the fly and you dont have to burn a new chip or convert your harness. hondata is awsome and dataloggin is rad but who wants to burn a new chip everytime the weather changes?
Just my .2 cents
Blaze
Just my .2 cents
Blaze
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