i've convert down to obd1 in search for more power...but the butterflies r not working...there is no vaccum....a friend told me that obd2b and obd1 has opposite ground on the manifold...but im not sure....need help......

 

Which OBD1 ECU are you running? You need a P72 for the IAB functionality.

 

yeah. you have to either run a obd1 p72 or get a p28 with IAB's added to it. i'm guessing you're running a p28?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by undercoverdc2 &raquo;</TD></TR><TR><TD CLASS="quote">yeah. you have to either run a obd1 p72 or get a p28 with IAB's added to it. i'm guessing you're running a p28?</TD></TR></TABLE>

The p28 mod is pretty easy to do. Just find the 5151s highside switch on ebay and you can add it

 

im running the p72...its just coverting down to search for more power....but the butterflies won't work...a friends cousin told me that the obd2b has different feedback from the obd1.....on the odl1 it sends negative charge and the obd2b its sends positive......so if converting down my 2000 gsr to obd1...its like a negative ecu to a negative input..the butterflies....but thats what he said.....i still need help!

 

hmm...i don't know. i think my system worked ok when i tried my cousin's obd1 gsr ecu. i have a 2000 GSR as well. but i really couldn't hear over my open wastegate and turbo but since i have all that off now, maybe i'll ask my cousin to try is obd1 gsr ecu again.

 

i also converted to obd1 but i also took out the secondary butterfly plate overall? would that still affect anything?

 

u should check the vaccum hose on the actuator...the spacer looking...it should have vaccum if its working....check it ...

 

taking off or opening the butterflies will affect the full potential of the gsr manifold....its design to mantain power throughout the band...u will lightly notice lost of power in low in but wouldn't notice much.......i went to the track last week with the obd1 p72...the butterflies not in working mode.(open full time...) i ran 5 times at a constant time at 15.2 and 15.1.....got pissed....hooked back my original ecu obd2b(secondary working now....ran 7 times at a constant time at 14.7 and 14.8....big difference ........im hear to find out y my butterfly is not working with the obd1 ecu...it worked on two of my friends 94-95 gsr....maybe there is differences in the signal....still need help!

 

I shall refer you to the manuals at this point. Search google for "hondahookup manuals" and download the 94 and 98 Integra manuals.