can i run BBK with stock ecu mostly on city streets?
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can i run BBK with stock ecu mostly on city streets?

This is a discussion on can i run BBK with stock ecu mostly on city streets? within the Grom Performance forums, part of the Honda Grom Garage category; my idea is 143bbk + pcx150 FI + cam shaft stock ecu stock exhaust Can i use it for long term?...

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Thread: can i run BBK with stock ecu mostly on city streets?

  1. #1
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    can i run BBK with stock ecu mostly on city streets?

    my idea is 143bbk + pcx150 FI + cam shaft
    stock ecu
    stock exhaust
    Can i use it for long term?

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    I would send out the stock ECU and have it reflashed with the hardware you are installing, there is a few places that will reflash to your hardware update.

    For more HP I would take the stock inlet tube and spacer plastic and bore and polish it to 26-27mm and also open up the intake port to that same I/D dia.

    I would at lease get a better exhaust system that is with in your budget, there is a lot on ebay and if you do, take the exhaust port on the head and open it up to match the I/D of the pipe. Makes for a better flow out of the engine.

    Your stock throttle body is more than enough and don't need to modify it.

    If you engine is a high mileage engine I would at lease take the valves off and clean it up and do a valve lapping and if need be get a crower duel valve spring setup.

    Get rid of the stock oil spinner and go for the Kitaco clutch side cover.

    good luck

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    I wouldn't bother installing the cam if you're going to keep the stock exhaust and stock ecu. I would def install a colder spark plug, and a TTO head temp gauge (reads temp at the base of the spark plug). Make sure it stays under 375F. For city streets, I think it will run ok. Freeway speeds is where things really heat up, and a aftermarket ecu/tuner is required. Probably gonna need stiffer clutch springs too.
    Quote Originally Posted by Paultergeist View Post
    It seems like there is always one more thing to buy, THEN I’ll really notice a difference in performance.

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    for that setup, an EFIE would probably pair with the stock ECU well.

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    thx you all
    It is possible that even if I use PCX150 FI+ moded cam shaft, it will not be able to replace the aftermarket ecu?
    i mean with PCX150FI and cam shaft engine will get more fuel for 143 bbkit

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    Quote Originally Posted by stxklr View Post
    thx you all
    It is possible that even if I use PCX150 FI+ moded cam shaft, it will not be able to replace the aftermarket ecu?
    i mean with PCX150FI and cam shaft engine will get more fuel for 143 bbkit

    This has been discussed before.... but the stock ecu will trim down the higher flowing PCX injector so it fuels like stock. You get the benefit of having more flow so that you can support a BBK. I think there are a few that run that bbk with a stock ecu and pcx injector but definietly run the EFIE to get AFR's down

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