i recently purchased a 95 4 door special edition with a 97 gsr swap.....the guy i bought it from tells me that he put in a OBD1 computer. so my question is what advantage/disadvantage to having this "upgrade".

 

From what I have heard, they say an OBD I ECU will respond to aftermarker mods better. That is the only difference that I have heard of.

 

I've also heard that the obd1 does not have a governor, whereas the obd2 does have one. Can anyone confirm this ?

 

I could be wrong here too, but I heard that only the 1998+ integra's have a top speed governor. I thought all the 1997's and earlier could go as fast as their car could take them? I might be wrong on that , but I thought I've read it on here before in one of the GSR top speed threads.

 

Its not the 98's because I can go as fast as I want (no figures...:thumbup: )

 

I have a 95 GS-R and I'd have to say this car (obd-1) does not have a govenor. I live in Germany (government employee) and I run the autoban all the time. So far my top speed is 145. I can go only go that far because I have V rated tires (149). I had plenty of pedal left and have only bolt-ons. Comptech all the way!

 

The whole "OBD1 responds better to mods than OBD2" thing is a complete overstatement. The only sort of tuning restriction an OBD2 ECU poses is that it has a learning capability which prevents you from running advanced ignition timing.

The way it works is basically like this:

In the ECU there are stored base maps for fuel and ignition. Base timing on the distributor is set to 16 degrees BTDC. The ECU is able to advance or retard the timing on the fly. The OBD1 computers assume the distributor is always set to 16 degrees of advance and adjusts the timing by a certain number of degrees to achieve the desired value in the stored map. If you advance the timing to 18 degrees BTDC, then you will get 2 degrees more advance across the board.

OBD2 computers are able to "figure out" that the distributor has been advanced and will eventually learn to compensate for the extra advance and still give you the same timing value as what is laid out in the stored map. It doesn't happen immediately but it does eventually do its job.

One other issue with the OBD2 computers is that they're as of yet "unchippable" for the most part so if you want to get a Hondata or something along those lines you have to convert your wiring back to OBD1 because the plugs are different.

 

Wow 145, thats pretty impressive. I'm just curious, but what mods do you have? I have a 96 gsr and I don't have the balls to find out the top speed of it. You really think you could go faster if it weren't for your tires?

 

No integras have top speed limiters.

 

I know I could go faster than 145. There is a guy over here who has a Civic SI (99 I believe) and he has basic bolt ons. E/H/I, fuel pressure reg, and I thing ignition system. His top speed is 154.

My bolt ons are: Comptech H/E, test pipe, K&N intake, B&M fuel pressure reg. and that's it. I am positive I can go faster than 145. Had plenty of pedal and power. I could feel it. I just don't want to die out there trying. So I'll get better tires first.