Section : Carburettors

Heatshields

Posted By : Adrian Lee, 19-May-2003, 05:20pm

• Heatshields

  Posted By : Nigel Gibbins, 19-May-2003, 05:33pm

  I wouldn't say that it is essential, but for the sake of a few quid - you may as well have one.
  
  The heatshield (as you probably know) was supposed to prevent vapour lock and/or fuel evaporating from the floatbowls. I have found some cars are very succeptable to this and others are not.
  
  I have only had one car with a heatshield and that was already fitted - maybe I was lucky on all the others!?
  
  NiG
  http://www.niginthecar.net
  
  PS if your using waxstat on your SU's I would seriously recommend a heatshield or convert to non-waxstat.

  • Heatshields

    Posted By : Adrian Lee, 19-May-2003, 05:53pm

    Excuse my ignorance but what is waxstat?
    
    With regards to the Spitfire thing Nigel I know you Spitty people are thickskinned and humourous, it did not get the reaction I thought it would but there ya go.
    
    In relation to 1300 Spitfires being faster than my Vitesse, at the moment the speed of The Australian continent going north seems impressive in relation to the speed of my Vitesse.

    • Heatshields

      Posted By : Nigel Gibbins, 19-May-2003, 09:13pm

      Hi again,
      Yep - your right, Spitfire drivers are thickskinned - you have to be to get through a full winters 'top down' driving - Brrrr! :-)
      
      Waxstat, hmm, (or Capstat) is a type of SU jet bearing that was developed to raise the jet (or lower it) dependant on the temperature of the fuel passing through it. A temperature compensator if you will... the problem with them is on a hot sunny day the under bonnet temperatures can get so hot the jet is 'leaned' off far too much and the engine will stop (or not re-start) - so most people convert them back to the standard jet.
      
      I think the real problem lies with 'old' jets and new ones are probably okay - otherwise they would never have used them.
      
      You can easily tell if you have waxtats by looking at the jet assemblies (at the bottom of the carbs). If they are big and flat then you have Waxstat, if small and slim (usually red) then you don't.
      
      I think they were introduced for the Spitfire 1500 but weren't fitted to all.
      
      NiG
      http://www.niginthecar.net
      
      
      

      • Heatshields

        Posted By : Adrian Lee, 19-May-2003, 11:26pm

        Thanks Nigel, I'm thin and red, not fat and big... does that mean I don't have them, me hopes so. I think I'll spend a few quid and get some heat shields anyway.
        
        cheers bud

        • Heatshields

          Posted By : Nigel Gibbins, 21-May-2003, 02:08pm

          Sounds to me like you don't got them - hurray!
          NiG