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Thread: Rolling road.

  1. #31
    Off the Xmas card list kapri's Avatar
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    Matt, I've just come in to post that very thing ! I'd already checked the TDC on the crank mark but I've just noticed different part numbers on the cam wheels I have here and the one fitted one the engine is a Cortina one ( starts 70-) and the Sierra unit (starts 84-) ,in the garage , has the 'notch' half a tooth different to the Cortina ( so about 4.5 degrees out). I've got to stick the exhaust back on in a minute. Then if I'm up to it I'll swap the pulley over .
    Last edited by kapri; 24-08-2009 at 17:05.

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  3. #32
    My name is Martin 30psi's Avatar
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    4.5 deg's at the cam is quite significant as thats 9 at the crank

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    Off the Xmas card list kapri's Avatar
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    Quote Originally Posted by 30psi View Post
    4.5 deg's at the cam is quite significant as thats 9 at the crank

    Tell me about it !!

    The vernier would have sorted it ( still waiting on it to arrive ) but I'd never have found out 'why' , and it woudl have bugged me ( sad I know ) .

    A mate from Essex turned up this afternoon so haven't got it back together yet, so hopefully sorted in the morning .

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  6. #34
    Official RnS Addict Phunkie Hiboy's Avatar
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    Quote Originally Posted by kapri View Post
    Running out of options here .
    Stick one of those s****y 16V heads on it !! (worked for me)
    Built without compromise by the more luck than judgment method

  7. #35
    Off the Xmas card list kapri's Avatar
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    Just trying to get it running Chris , plans for the Pinto in the POS though . Well, as I've broken it seems rude not to improve it while it's in bits
    Last edited by kapri; 24-08-2009 at 18:25.

  8. #36
    Off the Xmas card list kapri's Avatar
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    It just gets better Turned out I had a Sierra one on there anyway but timing plates are different as well , I've managed to match the timing plate to the correct cam wheel as I had 2 Sierra camwheels around .

    I've also found the camwheels are different even with the same stamped part number ,there is a 20 cast on one and a 25 on another , Cortina one has 14 on it as well .

    The timing mark isn't quite right still, probably 3-4 degrees out retarded still but can't fix that until the vernier pulley arrives. Fuel standoff has all but gone though.

  9. #37
    My name is Martin 30psi's Avatar
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    Noob question, what do you mean by fuel standoff?

    You could still check the cam timing without the vernier to see if it's close to being in time

  10. #38
    Off the Xmas card list kapri's Avatar
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    Fuel standoff ,also known as reversion is when you get a mist of fuel sat above the carb mouth. It's usually caused by pulses in the intake system forcing intake air back up.It's a sign of lots of cam overlap in a performance engine or late valve timing ( or exhaust blocked ) in a milder engine . Isky cams have a good tech answer to the reasons why it happens, I just know it's not a good sign in my engine .

    Yup, I could run through setting the exact TDC and cam lift with a dial gauge etc but it's a bit of a workup once installed in the truck .I'd rather only do it once when the vernier wheel gets here. Leaning across the wings and into the bay well and truly screws my back so...

  11. #39
    My name is Martin 30psi's Avatar
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    Yeah I understand about your back. Cheers for the info re the fuel reversion

  12. #40
    Off the Xmas card list kapri's Avatar
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    Well I swapped in the Cortina camwheel with approx 4-5 degress less (retarded) ..no difference, it's still just 'flat' . Been looking at the carb to ensure second choke is fuelling through the aux venturi . I'm not conviced that it is but blown it all through and no blockages on that circuit and the high speed enrichment circuit works and that comes from the same emulsion well .

    Guess I'll swap in another carb tomorrow so at least it's ruled out

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