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What is an A.F.B.?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 85Blazernga, Apr 17, 2001.

  1. 85Blazernga

    85Blazernga Registered Member

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    Anyone know about a carb called an A.F.B.? Are they any good?

    GSB
    Forever #3!!
     
  2. thatK30guy

    thatK30guy 1 ton status Premium Member

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    AFB stands for Aluminum Four Barrel. Carter makes them and Edelbrock models theirs after Carter. Both are good reliable pieces. I have heard both good and bad about either one. The best thing about them is that they are very easy to tune because all the adjustments are on the front where they are easily reachable.
     
  3. 85Blazernga

    85Blazernga Registered Member

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    Comparable to a Q-jet?

    GSB
    Forever #3!!
     
  4. 85Blazernga

    85Blazernga Registered Member

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    Comparable to a Q-jet?

    GSB
    Forever #3!!
     
  5. Blazer79

    Blazer79 1/2 ton status

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    Great carb on flat surfaces, but not the one you want for offroading. Check out this link and see for yourself: <A target="_blank" HREF=http://www.dorianyeager.com/qjetrules.html>http://www.dorianyeager.com/qjetrules.html</A>

    <font color=blue>//////
    <A target="_blank" HREF=http://blazer79.coloradok5.com>http://blazer79.coloradok5.com</A>
    </font color=blue>[​IMG]
     
  6. BadDog

    BadDog SOL Staff Member Super Moderator Author

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    Q-Jet is vastly superior off-road. On the street, they are both capable carbs although the Q-Jet is generally, IMHO, a better carb.

    Bad Dog

    85 K30 CUCV, 350 TBI, TH400, NP205, D60/C14, 4.56 Locked
    Soon: 4" lift, 40" tires, massive cutting, shorter wb and rear overhang.
     
  7. Emmettology 101

    Emmettology 101 3/4 ton status

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    There is an off-road kit you can buy for these carbs that helps off-road, but the Q-jet is still better for off-road.

    Mike - <A target="_blank" HREF=http://emmett.coloradok5.com>http://emmett.coloradok5.com</A>[​IMG]
     
  8. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    I've got the Edelbrock version...way superior to the Q-jet on the road. Off-road is a different story though. My truck was flooding out on me when I was on the ramp last night...
    At TSF near Portland I had the pleasure [​IMG] of backing down a very steep rocky hill climb without the benefit of a running engine because it was so flooded it would not re-start...
    However I do love it for on the street, I get better mileage and throttle response than with my old Q-jet, and I'm hoping to improve the Edelbrocks performance with the "off-road" kit and lowering the float levels a tad.

    Rene

    [​IMG]<A target="_blank" HREF=http://jules.coloradok5.com>http://jules.coloradok5.com</A>
     
  9. Emmettology 101

    Emmettology 101 3/4 ton status

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    M buddy with the CJ put the kit in and still has problems with angles, althoguh not as bad as without the kit. He just put the kit in and that was it. Hopfully you can adjust yours better than he did....

    Mike - <A target="_blank" HREF=http://emmett.coloradok5.com>http://emmett.coloradok5.com</A>[​IMG]
     
  10. BadDog

    BadDog SOL Staff Member Super Moderator Author

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    Rene, you should try Edelbrock's Q-Jet. I have run both the Edel AFB and the Edel Q-Jet, off idle and part throttle performance was comparable (as long as the secondaries come in late and fast reaching WOT at the same time as the primaries) with the Q-Jet taking it hands down on the top end (454 in my old '75). I also called Edel Tech (talk to a couple of them actually) about the "off-road kit". The general consensus was that the off-road kit will make it more robust for things like mud and dunes but forget it for rocks or anything where you have significant angles (I told them I spent most of my time in the rocks). The kit will help but nothing will make it work as well as a stock Q-Jet on angles. This was from their own tech support who also advised me to return the AFB and not "waste my money" (their words) on the kit. They also were not trying to sell me a Q-Jet since we were discussing putting my old Q-Jet back on. Well, the butterflies were worn in my Q-Jet plus the filter plug was JB'ed in place because it had stripped so I returned the AFB and got the Edel Q-Jet. Wow! I loved that thing, easily the best carb I have ever run.

    Bad Dog

    85 K30 CUCV, 350 TBI, TH400, NP205, D60/C14, 4.56 Locked
    Soon: 4" lift, 40" tires, massive cutting, shorter wb and rear overhang.
     
  11. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Bad Dog is correct on all counts here!!!

    tRusty, you definitely need to try out the Edelbrock Q-Jet. I have a brand new one on my 85 K30 with the 454. The part no. is 1904 (I think), and it runs like a charm. Waaaayyyyy better than the stock Q-Jet, and I wouldnt have anything else but the Q-Jet on any of my trucks.
     
  12. cederic

    cederic Registered Member

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    Whoever owned my 85 before me put a Edelbrock intake and AFB 1406 carb on it. I'm an old Q-jet fan myself but I have to say that this carb is pretty good. I like the fact that it's easily adjustable and you can buy different jets, step springs, and metering rods from a store rather than digging thru the junk yards.
    Go to the Edelbrock web site. You can print the owners manual with pictures and everything. It's a good little book to have.
    My only complaint is that you can't use the factory air cleaner without a 1" spacer made by Mr. Gasket. Its a balancing act to put the aircleaner on and keep the spacer and two gaskets in place.

    [​IMG]

    What do you call a fly after you pull off it's wings ?
    A WALK...ahhehe
     
  13. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Well I won't be doing anything significant to my truck for a little while, at least until I hear from the insurance company...

    When I've sorted through all the crap, I'll definitely look into the Edelbrock Q-jet.

    Rene

    [​IMG]<A target="_blank" HREF=http://jules.coloradok5.com>http://jules.coloradok5.com</A>
     

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