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off road carb recommendations UPDATE!!!

Discussion in 'The Garage' started by muddysub, Dec 5, 2006.

  1. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

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    yes i searched....


    i never thought i'd own a carb'd vehicle but my new 78 bronco has an edelbrock something on it... its a POS, tiny little off cambers/hills and it dies right away... i looked around and a lot of people like Qjets and truck avengers... but since i know NOTHING about carbs i figured i'd better ask and figure things out for sure... i dont know if its vacuum operated secondaries or not, hell i dont even know what the hell vacuum operated secondaries are... im a diesel guy. this stuff confuses the **** out of me.... what kinds of carbs are out there? what kinds of secondaries? what makes a good offroad carb? someone help me please...

    here are pics of whats on it...

    oh and its got a vacuum leak. (so im told anyway) once again, im not used to vaacuum, only boost pressure. how the hell do i find a damn vacuum leak?
     
    Last edited: Dec 19, 2006
  2. rcamacho

    rcamacho 1/2 ton status

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    You might try adding the spring loaded needle&seat for the carb.
    I use an old Holley 3310-1 with offroad needles and internal baffles - works fine for everything I'd attempt.
     
  3. mrk5

    mrk5 The Sticker Guy Moderator Vendor GMOTM Winner Author

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    I don't know much about Edelbrocks, but I'm sure that's a vacuum operated secondaries.

    I like my Holley Truck Avenger. It took some tuning, but does well enough for a carb on the trail. For me it is an easy carb to tune.

    Carbs typically have troubles due to fuel spill over from the float bowl vents. I also know that Holleys can get fuel gravity draining back though one of the circuits into the venturis.

    I think that there is a Ford 2-barrel carb that is popular for wheelin. :dunno:
     
  4. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

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    its a 4bbl even i know that. count em in the second pic...
     
  5. scooter122983

    scooter122983 1/2 ton status

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    he means that there is also a carb made by ford that is popular for wheeling. not that the carb you have is a 2 bbl.
     
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  6. 83ZZ502_Jimmy

    83ZZ502_Jimmy 1/2 ton status

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    Agreed.

    However, the edelbrock you have can be made to work just fine. I modified mine with the off-road needle and seat and a couple other tricks and its worked great.

    There are a few threads dedicated to this on this carb.

    John
     
  7. big dan

    big dan 1/2 ton status Premium Member

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    I say q-jet all the way. Ive ran both a holley and edelbrock with spring loaded needle and seats and both my stock q-jets have out performed them in every way. when I rolled my truck it came to a rest on its side, still running with the q-jet but had very low oil pressure.
     
  8. mrk5

    mrk5 The Sticker Guy Moderator Vendor GMOTM Winner Author

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    Yep, that's what I meant. :rotfl:

    Stormtrooper runs a worked over edelbrock with success. Evidented by this pic:
    [​IMG]
     
  9. vortec

    vortec 1/2 ton status

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    i'd like to give the truck avenger a whirl, but until i do, it's q-jet all the way. i've never managed to kill it from angle or bounce.
     
  10. Chevy305

    Chevy305 6 Lug 14bsf Status Premium Member GMOTM Winner

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    Well it all depends on the type of wheeling that you do. Then get a carb that'll handle the demands.

    I'm a Holley man so I have to recomend a Holley truck avenger. Of coarse, don't think its a bolt on and go carb. There is quite a bit of tuning you have to do first to get it running correctly.
     
  11. badmix

    badmix 1/2 ton status

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    Ive got the Holley Street avenger carb. The only diff. between them and the truck is mainly the cross over tube on the top. When I first ran my Holley, it would die on any kinda steep grade and not so steep. I called HOlley and they sent me for free a cross over tube to put in and told me to lower the floats (this was simple as moving a couple screws). Now it does jus fine. :D

    they do require some tuning. Ive gotten pretty good at using the vacuum gauge method, it seems to really work well, but you have to have a good motor to start with , with no vacuum or air leaks, etc.
     
  12. muddysub

    muddysub 1 ton suburban status Staff Member Moderator GMOTM Winner

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    a guy at work has an efi system off an 80s mustang with a 302 in it that hes parting out. will this work on my motor?
     
  13. big dan

    big dan 1/2 ton status Premium Member

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    to find your leak use something like ether or carb cleaner and spray it around areas where there could possibly be a vaccum leak, vaccum hoses, carb base, intake gasket stuff like that. with the motor running by the way. if there is a leak it will suck the fluid in and the motor will speed up everytime you spray it in the leak.
     

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