FBM BIG BORE + FBM Turbo = 27hp and 19ft lbs !!
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FBM BIG BORE + FBM Turbo = 27hp and 19ft lbs !!

This is a discussion on FBM BIG BORE + FBM Turbo = 27hp and 19ft lbs !! within the Grom Talk forums, part of the Honda Grom Forums category; Sorry we haven't been too active on here. We finally got a chance to test our 200cc big bore with and without a turbo. The ...

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Thread: FBM BIG BORE + FBM Turbo = 27hp and 19ft lbs !!

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    FBM BIG BORE + FBM Turbo = 27hp and 19ft lbs !!

    Sorry we haven't been too active on here. We finally got a chance to test our 200cc big bore with and without a turbo. The results are scary.. This big is INSANE to ride.

    Setup

    - FBM 200cc Big bore forged piston kit
    - FBM Stage 1 ported head
    - FBM HD Case/Head studs
    - FBM Turbo
    - FBM Custom Injector
    - DJ Power commander



    The purple line is the big bore without the turbo (20HP) , the blue line is BIG Bore + Turbo (27HP but alot more top end)





    a_morti and arunto like this.

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    is Grand Poba
     

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    That's nutz!
    '00 VFR Sold
    '08 Busa Sold
    '10 Tuono Factory Sold
    '14 GROM
    125cc----->181cc of Takegawa Powa!

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    Nice work... BUT....


    You are asking a lot out of it... and the new cyl/head studs are great. BUT, are you threading them into the stock case? Or, are you putting in "Case Savers"? (can't tell from the pic)

    Back in the day... playing with air cooled VW's... we would pull the (aluminum) threads out of the case running high compression, or Boost. So, we would drill the case threads, and insert a threaded sleeve (steel) with a backer, so the studs couldn't pull out.
    Tony

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    Quote Originally Posted by RACER X View Post
    That's nutz!
    Yep that is great

    I wounder what the break down cost for each part.

    wondering about the connecting rod, is it OEM or HD?

    Just noticed on the pic the Crank shaft, so I'm sure that the connecting rod is special made for the engine
    Last edited by CiscoSanJose; 10-31-2014 at 11:48 AM.

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    Actually... on second sight.... that cyl doesn't look like it's going to be very reliable. There's almost no "Meet" on the cam chain side. So.... 1) You will have really bad cooling at that point. and 2) it's not supported very well, so the cyl will wind up being oval shaped as it warms up... and 3) There's minimal head gasket clearance. With boost... that's just asking to blow out.

    For a 200cc cyl... you need a heavier casting to start with.


    Nice numbers... but I'll be more interested in hearing how it's doing after a few thousand miles.
    Tony

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    Quote Originally Posted by Dr Honda View Post
    Actually... on second sight.... that cyl doesn't look like it's going to be very reliable. There's almost no "Meet" on the cam chain side. So.... 1) You will have really bad cooling at that point. and 2) it's not supported very well, so the cyl will wind up being oval shaped as it warms up... and 3) There's minimal head gasket clearance. With boost... that's just asking to blow out.

    For a 200cc cyl... you need a heavier casting to start with.


    Nice numbers... but I'll be more interested in hearing how it's doing after a few thousand miles.
    There is a iron sleeve in it that is plenty thick. It will not oval out. Gaskets blowing out will be tough because it is not only relying on the gasket for a seal. We are building a second one for another customer and both will be heavily abused.

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    Moar pics of turbo!

    Black 2014, Brembo, Chimera, Dynojet, G'Craft, H2C, Kitaco, Koso, SP Takegawa, Vagabond, Yamamoto, Yoshimura...
    Quote Originally Posted by rolldeep View Post
    They said "we no even reset ecu bitch" and hung up.

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    we need more!!!!!!!!!!!!!!
    2014 Honda Grom 170
    1999 Honda Nighthawk 750
    2002 Honda XR70R w/BBR 88 big bore
    2006 Honda CRF230F
    2007 Honda CRF50F (son's)

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