Rough BHP Estimate - Mods

  1. Infrequent Poster Joined: Jun 2013 Hall Green / Birmingham Posts: 139 VTS Track Car
    #1
    So we have a VTS bottom end that's been rebuilt with race bearings and new piston rings. The rest is standard, rods etc.

    We're fitting the below parts to this rebuilt engine and was wondering the rough BHP we would be looking at after a remap. Also would the standard ECU be able to cope with these parts and a remap?


    - Polished & Ported & Gas Flowed Head
    - Larger Inlet & Exhaust Valves
    - Piper BP285H Cams
    - Direct to Head Throttle Bodies
    - 4 Branch 4-2-1 Manifold
    - Decat, Non Res, Magnex Back Box
  2. Saxperience Forum Bum Joined: Mar 2009 Morpeth Posts: 2539 BMW 116d Regional Toner Sales Edition
    #2
    1 user thanked this post:
  3. Saxperience Hardcore! Joined: Mar 2008 Posts: 31279 Citroen Saxo VTS, S60 D5
    #3
    Just get it on a RR dude.. too many variables to be guessing
  4. Super Moderator Joined: Nov 2009 Cambridge(ish), UK. Posts: 10581 BMW 5x M50d.
    #4
    Quote:
    Originally Posted by boylin View Post
    So we have a VTS bottom end that's been rebuilt with race bearings and new piston rings. The rest is standard, rods etc.

    We're fitting the below parts to this rebuilt engine and was wondering the rough BHP we would be looking at after a remap. Also would the standard ECU be able to cope with these parts and a remap?


    - Polished & Ported & Gas Flowed Head
    - Larger Inlet & Exhaust Valves
    - Piper BP285H Cams
    - Direct to Head Throttle Bodies
    - 4 Branch 4-2-1 Manifold
    - Decat, Non Res, Magnex Back Box
    You'll need a standalone ECU for the throttle bodies (some say the stock ECU can be mapped for it but... good luck with that).

    Utter waste of money and effort trying to fit larger exhaust valves. Pointless so don't bother. If you want larger inlet valves, use a JP4 cylinder head. Come as standard with 1mm larger inlets.

    Rough BHP would be 160 on an honest dyno - more obviously if you go to a quote-me-happy place. And there's plenty of em...
  5. Saxperience Forum Bum Joined: Mar 2009 Morpeth Posts: 2539 BMW 116d Regional Toner Sales Edition
    #5
    I hear evotune's rollers read high, especially for silver cars?

    trolololololol
  6. Saxperience Hardcore! Joined: Mar 2008 Posts: 31279 Citroen Saxo VTS, S60 D5
    #6
  7. Saxperience Forum Bum Joined: Mar 2009 Morpeth Posts: 2539 BMW 116d Regional Toner Sales Edition
    #7
    Quote:
    Originally Posted by Prickle View Post
    hahaha
  8. Super Moderator Joined: Nov 2009 Cambridge(ish), UK. Posts: 10581 BMW 5x M50d.
    #8
    Quote:
    Originally Posted by D4MJT View Post
    I hear evotune's rollers read high, especially for yellow bmw cars?
    Fixed.
  9. Saxperience Post Whore Joined: Jul 2011 Newcastle upon Tyne Posts: 7779 Phase 2 VTS , E61 M5
    #9
    anything less than 120bhp is homosexual
  10. L-plater Joined: Jun 2014 Posts: 94
    #10
    Wayne schofield from chip wizards can map a standard ecu for bodies or turbo. Very helpfull if u contact him.
  11. Super Moderator Joined: Nov 2009 Cambridge(ish), UK. Posts: 10581 BMW 5x M50d.
    #11
    Quote:
    Originally Posted by Duffy Xsi View Post
    Wayne schofield from chip wizards can map a standard ecu for bodies or turbo. Very helpfull if u contact him.
    Has he figured out how to get the temperature gauge working on Omex yet?
  12. Established Member Joined: Dec 2010 Aberdeen Posts: 2129 Race: 106 Rallye 16v. Road: Mercedes Vito 120 CDI
    #12
    Quote:
    Originally Posted by Ross View Post
    Rough BHP would be 160 on an honest dyno - more obviously if you go to a quote-me-happy place. And there's plenty of em...
    I see your 160bhp and i'll raise you to 165-170bhp.

    Any info on pistons used? Hi comp ones i presume?

    My old old engine made 166bhp with 708's & GRX R1000 TB's on a non quote me happy RR so with the addition of hi comp pistons and a ported head i'd expect more than 160bhp.

    My last engine made 192bhp with bent valves on a dyno before being stripped down, my new engine will make...
  13. Super Moderator Joined: Nov 2009 Cambridge(ish), UK. Posts: 10581 BMW 5x M50d.
    #13
    Quote:
    Originally Posted by Dave_P View Post
    I see your 160bhp and i'll raise you to 165-170bhp.

    Any info on pistons used? Hi comp ones i presume?

    My old old engine made 166bhp with 708's & GRX R1000 TB's on a non quote me happy RR so with the addition of hi comp pistons and a ported head i'd expect more than 160bhp.

    My last engine made 192bhp with bent valves on a dyno before being stripped down, my new engine will make...
    I'm presuming not forged as op said "standard bottom end". 160-165 is about where it'll be