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Rejetting for LA > SLC elevation

Discussion in '308/328' started by miahshodan, Dec 6, 2018.

  1. miahshodan

    miahshodan Rookie

    Feb 25, 2016
    10
    West Jordan, UT
    I recently bought a 1975 308 GT4 from Los Angelos and brought it to Salt Lake City, Utah. I tried adjusting the carbs for the eleveation (4500 ft) But I think I only made it worse. I suspect they need more than an adjustment, they probably need different jets. My question is how much different. The car has a K&N filter, no sound deadening in the airbox (doesn't look like it ever did), no airpump, no cats and a aftermarket exhaust.

    Car runs so rich now that my eyes water when I am by the engine and it is running.

    Current jets are:
    Main: 135
    Idle: 50
    Air bypass 220

    Also anyone else in the area and/or know a good independent in the area?
     
  2. jmaienza

    jmaienza Formula Junior

    Jan 8, 2009
    403
    Massachusetts
    Full Name:
    Joe
    A good place to start is to contact www.piercemanifolds.com and speak to a technician. They are very knowledgeable and have all the jets you may need.
     
  3. miketuason

    miketuason F1 World Champ
    Silver Subscribed Owner

    Feb 24, 2006
    12,569
    Cerritos, CA.
    Full Name:
    Mike
    Use smaller mains and larger air correctors, that should lean out the mixture.
     
  4. miahshodan

    miahshodan Rookie

    Feb 25, 2016
    10
    West Jordan, UT
    thanks, are you thinking like a 130 main and a 225 air bypass, or something more drastic?
     
  5. miahshodan

    miahshodan Rookie

    Feb 25, 2016
    10
    West Jordan, UT
    Thanks, I'll give them a call when they are back, evidently they are off on Friday....wish I was ;)
     

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