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Thread: SP4 Rebuild

  1. #61
    Join Date
    Dec 2007
    Location
    kent
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    614

    Default

    Who cleaned the throttle bodies, JHP? Were they vapour blasted?

  2. #62
    Join Date
    Jan 2014
    Location
    Northamptonshire
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    155

    Default

    Throttle bodies and regulator were cleaned with a toothbrush and carb cleaner aerosol - and wide open garage door!

    Bracketry, springs, screws, rods all stripped cleaned up then replated zinc and yellow by Daventry Metal Finishers

    http://daventrymf.co.uk/

    JHP cleaned the green injectors, changed the filters and flow checked them.
    Last edited by tubbylad; 06-16-2021 at 04:25 PM.

  3. #63
    Join Date
    Dec 2007
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    kent
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    614

    Thumbs up

    your doing a bloody good job there, it will look better than factory new..

  4. #64
    Join Date
    Jan 2014
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    Northamptonshire
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    155

    Default

    Thanks. Hopefully it'll be tidy.

  5. #65
    Join Date
    Jan 2014
    Location
    Northamptonshire
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    155

    Default Oil Cooler Hoses

    So, back to DIY plating for these - not happy with the results though I'll persevere.
    All plating removed with Harpic Power Plus 10X bleach in about 5 minutes.
    Polished up with scotchbrote on a dremel fitting

    Have been able to procure a NOS pair for less than £100 for the stash of spares
    Longest one being hardest to come by as its NLA according to my local dealer but I think on Stein @ >€200
    Shorter one is NLA for the 888 however appears to be identical to 900SS which is still affordable
    Attached Images
    Last edited by tubbylad; 06-21-2021 at 02:55 PM.

  6. #66
    Join Date
    Jan 2014
    Location
    Northamptonshire
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    155

    Default Oil Cooler Hoses 2nd try

    Amazing what a bit of brightener does in the plating tank.

    I include pictures of the NOS parts for those that might think I've used them instead
    Attached Images
    Last edited by tubbylad; 06-23-2021 at 02:53 AM.

  7. #67
    Join Date
    Jan 2014
    Location
    Northamptonshire
    Posts
    155

    Default Reworked Pistons

    Glad the site is up and running again - thanks to those involved.

    So quick update.

    From being fully assembled we moved onto timing of cams where it became apparent there was a very slight contact between 37mm valves and the top edge of the 37mm pockets in pistons.

    Upon inspection the pockets were very slightly off centre (0.2mm) to the piston centreline so we decided to correct and them and increase to 38mm.

    So, with trusty Bridgeport and an angle plate, set about clamping through the gudgeon pin, clocking horizontal and with a boring bar cut some metal.

    In all a total of just under 1.5g was removed from each piston.
    Attached Images

  8. #68
    Join Date
    Dec 2018
    Location
    Australia
    Posts
    119

    Default

    Plating looks great

  9. #69
    Join Date
    Aug 2007
    Location
    Cornwall S.W. England
    Posts
    5,372

    Default

    [QUOTE=tubbylad;76763]Glad the site is up and running again - thanks to those involved.

    So quick update.

    From being fully assembled we moved onto timing of cams where it became apparent there was a very slight contact between 37mm valves and the top edge of the 37mm pockets in pistons.

    Upon inspection the pockets were very slightly off centre (0.2mm) to the piston centreline so we decided to correct and them and increase to 38mm.

    So, with trusty Bridgeport and an angle plate, set about clamping through the gudgeon pin, clocking horizontal and with a boring bar cut some metal.

    I would always cut the valve pockets to +1mm to clear the valves, 38mm would allow 0.5mm clearance around the valve for safety's sake.
    They're very big valves for a 888/94mm bore, what cams are you using?
    I'm running 37/32mm valves for a 955/96mm bore with T1 9*6 SPS cams, the big valves suit these fast opening short duration cams, they don't suit the earlier long duration cams as well.

    Steve R

  10. #70
    Join Date
    Jan 2014
    Location
    Northamptonshire
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    155

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    I was going to run 996SPS cams as I got a good deal on a VI and HE cams but got fed up waiting for the others to come along. Have since sold them.

    Dave Allenby (https://www.facebook.com/media/set/?...0257914&type=3) is confident A1's will deliver enough grunt. We did consider G cams but again couldn't find any - plus I don't want to be pushing power up the rev range.

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