Rallycross 1600 EG on 45's GS6 for my road car...........comments on parts requested.

Discussion in '8-valve' started by Jon Olds, Dec 21, 2016.

  1. Jon Olds Forum Junkie

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    and another;
    [​IMG]
     
  2. Jon Olds Forum Junkie

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    Plan is evolving (don't they ever?) The OE 1595 I have taken out of the CITI is in such good nick I'm getting tempted to clean and paint everything, lap valves etc and fit it back in.
    Which would mean the race '1588' going into my race mk1 instead. (Race ABF out for a refresh and more compression) Will decide soon.
    Anybody got any comments on the D shaped piston top of the 1595?
    Jon
     
  3. oldnick

    oldnick Paid Member Paid Member

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    No useful comments, just looking forward to the next installment :thumbup:
     
  4. Tristan

    Tristan Paid Member Paid Member

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    Strange Crown alright. Looks like a squish thing, more than compression. is SA fuel low octane?
     
  5. Jon Olds Forum Junkie

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    [​IMG]
    Not sure.
    Carb is relatively miniscule, so doubt its a performance thing.
    Also, some 'rimflo' type arrangement on the back of both inlet and exhaust valves.
    Jon
     
  6. Jon Olds Forum Junkie

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    rebuilt CITI 1595 head;
    [​IMG]
     
  7. drunkenalan Paid Member Paid Member

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    It would seem a shame to bin a good engine, maybe raise the CR a little for a little more go?

    The D shape block is unusual but I assume it's a combustion / emission thing?
     
  8. Jon Olds Forum Junkie

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    Skim the pistons flat and deck the block would be an obvious choice?
    The engine is std and good, so its probably going back to std.
    Carb is painfully small.
    The chokes look like lawnmover sized
    How you get 90hp through 2*25mm holes is anybodies guess
    My race 1600 is going to breath through 4 off 36mm chokes....
    Jon
     
  9. HPR

    HPR Administrator Admin

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    D pistons for some squish, altough the squish area should be cleaner as the rest of the piston, which is not the case, so the gap is too large...
    What is the std C.R ?
     
  10. Jon Olds Forum Junkie

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    std CR, not sure. need to do some more research on SA engines.
    Think its likely to be a lower CR for the home market where maybe fuel RON is lower.
    I'm down as low as I need to go with this motor.
    Zero wear on valve guides, minimal bore wear, big end bearings the cleanest I have seen in maybe a hundred used engines
    I have stripped over the years.
    New stem seals, quick valve lap, new sump gasket and its going back together. Bog stock.
    Well a little tickle wear the die grinder to smooth the short side radius........
    Jon
     
  11. Jon Olds Forum Junkie

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    guess the mileage?
    [​IMG]
    100K plus?
     
  12. Jon Olds Forum Junkie

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    everybody loves a pic or three: completed race EG;
    [​IMG]
    [​IMG]
    [​IMG]
    If anybody needs an 8v rocker cover for a dry sumper, I have just found this on a dusty shelf from the ex button mk1;
    [​IMG]
    Jon
     
  13. notenoughtime

    notenoughtime Moderator Moderator

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    Pics always good thanks Jon :thumbup:
     
  14. Jon Olds Forum Junkie

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    Its going into the race mk1. Cant wait to hear it burst into life. 5.8mm overlap on both valves at TDC.
    ............should be LOUD
    Jon
     
  15. notenoughtime

    notenoughtime Moderator Moderator

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    You will have to film the start up :thumbup: with sound obviously
     
  16. Jon Olds Forum Junkie

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    Only if I get the plug leads on the right way.........oh hum.............
    Jon
     
  17. TonyB Paid Member Paid Member

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    Looks good Jon :).

    You were asking somewhere about which distributor to use. I built an 1847 8v just recently with head, cam, pistons, rods, dcoe's etc. and had the distributor re calibrated to the spec I sent by H&H ignition solutions. Wasn't expensive, maybe 50.00? They also removed the vacuum advance set up and gave me the suggested timing figures to start from.

    http://www.h-h-ignitionsolutions.co.uk/

    Tel. 01384 261500

    Tidy guys, seem to know what they are doing.
     
  18. Jon Olds Forum Junkie

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    thanks, will follow that up
    Jon
     
  19. TonyB Paid Member Paid Member

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    No worries.

    Out of interest I used a later mk3 1800 carb distributor as it had the later O ring seal on the body of the housing - as opposed to the paper gasket under the flange of the earlier ones, that never gets fitted - so always weeps a little oil.

    As its was being re-calibrated I assumed it wouldn't make any difference.

    Not set up the engine on the Rolling Road yet so not sure how it performs, but should be reasonably strong. Fancied the shorted stroke 1847cc so it was a bit 'revvier' than a 2.0ltr.
     
  20. Jon Olds Forum Junkie

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    Fitted the paper 'seal'
    If it makes a happeth a difference I will be surprised, its only 5 thou thick.
    I presume you asked the dizzy company to up the advance 'swing' and move it up the rev range a bit?
    Heavier weights and more 'stroke' ?
    Or did you leave it to their expertise.
    Would be very interested in figures if the dizzy came with paperwork.
    This is the only site I have found that quotes dizzy 'swings';
    http://www.oldvolkshome.com/ignition.htm
    Jon
     

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