I have in hand a p30. going with my b20 short block, b16 head. Will I be fine to run that ecu? or should I get it chipped for a better fuel map since it is a 2.0 instead of a 1.6? sorry if it's a stupid question

 

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Chipped, always chipped, everybody chipped...
Hehehhe, It'll be pretty misadjusted for your application, vtec x-over will be totally innapropriate.

I don't hav any practical experience with running a larger displacment motor off of a smaller displacment ECU, but common wisdom would say it's going to get less fuel, and run lean.

-PHiZ

 

that's exactly what I thought. What about a p13? though it is meant for a h22 i know. But the fuel maps would be much better then the p30

 

you can run the p30 on the b20vtec with no problems....chipped would be best!

 

it will be fine, use a afc, and bigger injectors the timming maps will be pretty close... Jason

 

oh ok thanx guys. I will be getting a VAFC sooner or later... hopefully sooner.

 

you can use the p30 as long as its chipped with the 1.8 fuel maps, not one of those chips that just raise the rev limiter.
i use a p28 1.6 ecu chipped with b&m fuel pressure reg. set at 43psi on my b20.
stock fuel pressure was at 34psi on the p28. and i figure the p30 should be the same.

 

oh ok, kool deal. I will probably run it for a bit with the p30 and see how it goes and then deal with it a little later down the road.

 

fuel pressure has nothing to do with the ecu....ecu does not tell fuel pump how much pressure to keep....

 

But if you up the fuel pressure, you are increasing the fuel deliverd to the engine, compensatig for the fact that the ECU was tuned to run a much smaller displacment engine...

-PHiZ

 

true.