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Thread: chop top mk2

  1. #1751
    Administrator blackpopracing's Avatar
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    Before you waste the money you spent on it by draining it out again I would research why it runs hot (if it actually is running hot).
    You need to find out the real temperature it's running at first then find out why (if it is too hot).
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  3. #1752
    Official RnS Addict digger's Avatar
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    I use water wetter in my T and it works.
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  4. #1753
    Official RnS Addict mygasser's Avatar
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    I 've used water wetter too, good stuff. Definitely check the ACTUAL temp' the engine is running at before you go any further though. You must be able to borrow a digital probe from a local garage or friend.
    need a job done on your project? i may be able to help.
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  6. #1754
    Rods 'n' Sods Junkie alan's Avatar
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    Agree with Blackpop, that rad should be fine, its all about the amount of air passing through the radiator , taking the heat away.

    I have a 351 cleveland in a sierra and a sierra rad with the original shroud and twin fans, never had issues even in the heat and heavy traffic at Le Mans.

    Just found a pic of your rad.
    Ideally you want the fans to pull air through the whole surface of the radiator not just two circles, and as you have those cut outs in the support framework, that is also reduced the efficiency of the fans.

    Check out a production unit, the fan cowl is fitted tight to the surface of the rad so all the air the fan is pulling comes through the radiator.

    Also have you got the radiator sealed to the front panel so when you are moving forward, all the air that goes in the grill is funneled into the rad, ?

    all teething issues, easily sorted.
    Last edited by alan; 31-05-2017 at 21:01.
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  7. #1755
    Official RnS Addict WB54's Avatar
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    two things I'd look at 1, base timing, retarded timing builds a lot of heat, vac advance helps. 2, water flow, been mentioned on here, the wrong mix of coolant won't transfer heat and being pumped too fast either by a wrong size pulley or electric pump will throw it round without heat transfer. You need the restriction of the stat or a restrictor plate under the pump water passages.

    The point around fan shroud is also a good point, the fan needs to draw heat off the entire surface and the fan should be sealed to the rad.
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  8. #1756
    Rods 'n' Sods Junkie mike t's Avatar
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    Just a point to mention if you use more than the recommended anti freeze to water ratio which is normally 50/50 the coolant could freeze.
    In very cold weather.
    I know that sounds weird but very true so using all anti freeze and no water is a no no.
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  9. #1757
    Official RnS Addict chop top mk2's Avatar
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    thanks for all the advice, been through the way the rad is set up, the fans cover nearly the whole rad as they are. i have added an expansion tank to the rad and plumbed it into the bottom radiator hose so it now holds another 2 litres of coolant ( which is just blue antifreeze with a 50/50 mix ) and of course the wetter water stuff, just waiting for a couple of bits to land this week then i can see if its any better.

    got the car outside today to see how it looks, you cant really see the roof chop inside but out side it looks sick,
    Last edited by chop top mk2; 05-06-2017 at 17:42.
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  10. #1758
    Official RnS Addict chop top mk2's Avatar
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    heres those pic,s









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  11. #1759
    Rods 'n' Sods Junkie 69 ford's Avatar
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    The wheels/colour combo works really well, bet you're itchin to take it for a spin!
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  12. #1760
    Official RnS Addict markyb37's Avatar
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    Hi Tony,hope you're well.Just caught up with your progress.................absolutely fantastic .Not sure if its possible ,but she looks even better outside .Keep up the great work .Speak soon.Mark.
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