pr4 or pm6

[anthony90si]

hi i was just wondering if with a b18 if it would make a difference with the 2 different ecus. at first i had the teg ecu in but now i put in the old si ecu since it bolts right up. i just want to know if i can still get the same performance. and once get my turbo will i still be able to stick with an si ecu with out making performance suffer alot.
thanks

[bambam89lx]

you can use either ecu and it will run safely. As for the PR4, it will run your motor slightly better as it has fuel maps for the 1.8.
I don't suggest running either ecu with a turbo. You're gonna be running extremely and dangerously lean if you turbo and retain your stock tuning. You could use either and just use an safc or chip it.
But overall, I would recommend the PR4.

[anthony90si]

thanks man

[1PhatCX]

pm6 would make it run lean, pr4 runs ideal. since the pr4 is made for the b18. u can get an adjustable fuel pressure regulator, larger injectors and get ur ECU chipped with proper maps if u go turbo. would prolly be the best way and run an air/fuel gauge too

[civicHBsi91]

PR4 pulls harder, Ive had both.

When I first bought the car it came with a PM6 went to the junkyard got a PR4 and it pulls and performs much better.

[anthony90si]

thats weird cause i don't really see a difference

[civicHBsi91]

I didnt at first either.

I felt the difference up top, down low seemed to be pretty even until a certain point.