hi guys, i just finished a b18c1 motor swap into my 92 gsr. i used the 92 ys1 gsr tranny with the b18c1, and i have three options for the ecu. which would run the best? p28 chipped, stock p61, or p72. i would really appreciate any input, thxs.
there is no way to answer that. you will have to tune it regardless of which ecu you use. all i can say is if the c1 is OBD1 then use an OBD1 ecu, if it’s OBD2 then use an OBD2 ecu and save some headaches. otherwise the stock GSR ecu’s will run the same on the basic level. whatever you get, you will have to tune it.
Are you running the stock GSR manifold? if so run the P72 and run the wires for the secondary butterflies. If you have something like the skunk 2 manifold you could most likely use the p61. I don’t know if you would have to chip it though.
As i have the b18c2 swap with a chipped p28. I tried uberdata but fount it alters the fuel tables of the stock GSR.bin. So i changed to <crome> which seems to run excellent.
Quote:
“Oh and interesting tidbit #836 for today: The secondary butterflies are NOT controlled by the ECU–they’re controlled by vacuum. The ecu merely pumps a little additional fuel–and if you have a chip of any sort, especially most n/a chips, you’ll be dumping more fuel anyway. So honestly a p28 chipped to DOHC with more aggressive fuel mapping up higher will be right at home with a b18c gsr engine.” -zoomintegra