Carburettor choice?

Discussion in 'Ranchero Tech Help' started by jonnie, May 17, 2020.

  1. jonnie

    jonnie In Second Gear

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    Hi,
    You were all very helpful in identifying my engine as a ‘78 302, it has a Barry Grant carb fitted at the moment and it’s being a bit of a nuisance.! I’m thinking of changing it & was wondering if anyone had any good suggestions?
    i look forward to any help,
    Cheers,
    Jonnie
     
  2. handy_andy_cv64

    handy_andy_cv64 In Maximum Overdrive SILVER MEMBER

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  3. beerbelly

    beerbelly In Maximum Overdrive SILVER MEMBER

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    Jonnie, if your Barry Grant carb is a 4 barrel, I'm real happy with my Edelbrock 1403 500 cfm on my 289. Real nice snappy response and good mileage.
     
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  4. 65restomod

    65restomod In Overdrive BRONZE MEMBER

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    BG looks like it is now owned by Holly
     
  5. handy_andy_cv64

    handy_andy_cv64 In Maximum Overdrive SILVER MEMBER

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    Oh? It'd be news to me, but I'm not surprised.
     
  6. pmrphil

    pmrphil In Maximum Overdrive GOLD MEMBER

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    Yes, BG has been owned by Holley for a few years now, it was bought up at the bankruptcy auction.
     
  7. TestDummy

    TestDummy In Maximum Overdrive SILVER MEMBER

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    Edelbrock are great, economical, easy to adjust and long lasting carbs.
     
  8. jonnie

    jonnie In Second Gear

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    Thanks for the replies, I’ve been thinking about edelbrock as I’ve been told holleys can be a bugger to set up! The BG is a four barrel but seems a bit random.. would 500 cfm be ok on my engine?
     
  9. handy_andy_cv64

    handy_andy_cv64 In Maximum Overdrive SILVER MEMBER

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    If yours is stock, close enough to get it jetted to work. But remember, there are two different styles of four-barrel carbs, square-bore (all four butterflies the same diameter) or spread-bore (secondary butterflies larger than the primary ones).
     
  10. beerbelly

    beerbelly In Maximum Overdrive SILVER MEMBER

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    If your engine is fairly stock, 500 cfm is plenty. And the Edelbrock is a square bore carb.
     
  11. jonnie

    jonnie In Second Gear

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    I’m not sure what’s going on with the engine, it has motorsport bits all over it and when the carb’s on form it has a wicked throttle response but it ticks over fairly smooth so I’m guessing it doesn’t have an aggressive cam or anything?! Its completely unknown to me, I have no idea who built it, I bought the truck & am gradually finding out about it.!
     
  12. beerbelly

    beerbelly In Maximum Overdrive SILVER MEMBER

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    It could just be dress-up stuff, or it could have some big stuff inside too. Kind of a crap shoot.
     
  13. jonnie

    jonnie In Second Gear

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    That was what I was hoping, it looks lovely .. you think an edelbrock 500 cfm should do the trick then? i think I want a manual choke too if I can get one.
     
  14. 65restomod

    65restomod In Overdrive BRONZE MEMBER

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    Once it is set up right a automatic choke is good. It's my opinion
    I would get the electric choke heater though. modernize it a bit!
     
  15. handy_andy_cv64

    handy_andy_cv64 In Maximum Overdrive SILVER MEMBER

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    Yes, an electric choke thermostat is tons better than either a manual cable, or a thermal choke only.
     
  16. jonnie

    jonnie In Second Gear

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    Thanks again for all The help, I love the knowledge on this forum! I’ve taken tour advice beerbelly & ordered a 500cfm Edelbrock from a local & very helpful supplier & it should be with me tomorrow. Really looking forward to getting the BG carb off the truck & onto ebay
    Cheers,
    Jonnie
     
  17. SouthCarolinaRanchero

    SouthCarolinaRanchero In Third Gear

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    How much was the 500cfm Edelbrock if u don't mind me asking?
    How do u like it?
    Thanks!
     
  18. jonnie

    jonnie In Second Gear

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    Hi, It cost around £400(UK) and straight out of the box has vastly improved reliability & fuel consumption with no difference to performance. I am very pleased with it.
     
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  19. SouthCarolinaRanchero

    SouthCarolinaRanchero In Third Gear

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    Thanks for the input Jonnie.......looking to maybe upgrade the carb in the future.....
     

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