Welcome to Club Hot Rod!  The premier site for everything to do with Hot Rod, Customs, Low Riders, Rat Rods, and more. 

  •  » Members from all over the US and the world!
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and hundreds of thousands of posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show

 

Thread: BBC options for 71 suburban
          
   
   

Reply To Thread
Results 1 to 12 of 12
  1. #1
    medicman775 is offline CHR Member Visit my Photo Gallery
    Join Date
    Mar 2012
    Location
    Sparks
    Posts
    7

    BBC options for 71 suburban

     



    Hello there...new to here and not really a hot rodder but looking for some motor help. Some background, this motor is going into a 71 4x4 suburban, has 1-ton running gear, t400, 35" tires and will be a daily driver and do it all truck. It had an 89 tbi 454 in it that was pulled prior to purchase and has all wireing and ecm and plumbing still on burb and would like to keep it tbi if thats the consensus. I have a 454 that is 60 over with 346236 heads with roller rockers and comp cams 11-234-3 Extreme Energy cam. I know the heads aren't the best and looking at possibly getting some 781 heads and swapping rockers and such. I do have a set of 396 3931063 heads available but reading different posts it seems they aren't a good choice. If I stay tbi I do have an Edelbrock Performer TBI manifold. The truck forums I belong to have given me different/conflicting responses as regards to cam, heads, tbi. I am not opposed to running a carb but the efi stuff is all there. Any thoughts? Thanx

  2. #2
    cffisher's Avatar
    cffisher is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2006
    Location
    Constantine
    Car Year, Make, Model: 57 chevy 2 dr wagon
    Posts
    9,474

    First off Welcome to CHR. That said stick around and Pat or Jerry will pick this one up.
    Charlie
    Lovin' what I do and doing what I love
    Some guys can fix broken NO ONE can fix STUPID
    W8AMR
    http://fishertrains94.webs.com/
    Christian in training

  3. #3
    medicman775 is offline CHR Member Visit my Photo Gallery
    Join Date
    Mar 2012
    Location
    Sparks
    Posts
    7

    Thanx...I googled BBC forum and this was the first one listed, I looked around a bit and saw there were a few people(including those you mentioned)that might have some info so that's why I joined.

  4. #4
    pat mccarthy's Avatar
    pat mccarthy is offline CHR Member/Contributor Visit my Photo Gallery
    Join Date
    Apr 2005
    Location
    bay city
    Posts
    10,546

    you could use the 781 heads good heads but heads you have on the 454 may work ok would have to do with what your going after here ?i think the cam maybe ok but i use mostly rollers cam s in the bbc . i try running it with the tbi intake cam may want a chip
    Irish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip

  5. #5
    medicman775 is offline CHR Member Visit my Photo Gallery
    Join Date
    Mar 2012
    Location
    Sparks
    Posts
    7

    Just want a good motor for the rig, it's heavy. Want something that will pull the mountain passes around here and run right at my home elevation of aprox 4500'. Doing more research has me thinking the stock 454 tbi unit might not be up to the new motor? I do have performer 2.0 manifold and edelbrock 650 or 750 carbs avail. I just don't want to put one motor setup in and then need/want to change it, rather have it right while it's on the stand. I also understand that the edelbrock carbs are the best choice? I also have been giving advice on carb size from 650 to 850 depending on motor, elevation, etc.

  6. #6
    pat mccarthy's Avatar
    pat mccarthy is offline CHR Member/Contributor Visit my Photo Gallery
    Join Date
    Apr 2005
    Location
    bay city
    Posts
    10,546

    build a 496... TBI can work will need to be tuned in just like a carb as for the AFB / edel a rework Q jet would be the best for what your looking to do
    Irish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip

  7. #7
    medicman775 is offline CHR Member Visit my Photo Gallery
    Join Date
    Mar 2012
    Location
    Sparks
    Posts
    7

    A 496 isn't in my budget right now. With the parts I have and maybe the purchase of some 781 heads, what to you reccommend? Keep it as is and run tbi? Change heads and cam and go with q-jet? If so what cam and head work?

  8. #8
    pat mccarthy's Avatar
    pat mccarthy is offline CHR Member/Contributor Visit my Photo Gallery
    Join Date
    Apr 2005
    Location
    bay city
    Posts
    10,546

    run it like you have it now buy a intake bolt the Q jet on it run it
    Irish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip

  9. #9
    medicman775 is offline CHR Member Visit my Photo Gallery
    Join Date
    Mar 2012
    Location
    Sparks
    Posts
    7

    You think that is a better option than as is and with the tbi? Sorry for all the questions. Just want to do it right the first time with what I have. What size q-jet? Been told 750 by some and others have said 650 do to altitude.

  10. #10
    medicman775 is offline CHR Member Visit my Photo Gallery
    Join Date
    Mar 2012
    Location
    Sparks
    Posts
    7

    Also, what manifold for this motor/truck combo?

  11. #11
    pat mccarthy's Avatar
    pat mccarthy is offline CHR Member/Contributor Visit my Photo Gallery
    Join Date
    Apr 2005
    Location
    bay city
    Posts
    10,546

    there two ways to go so what do you want ? i realy can not help you much there only so much your going to do with what you have cam change may help but not alot more of a tuning thing with the TBI . i build engine s not tune in the old TBIs so you need to find some one that can help you tune it in . intake with the carb would be a dual plane performer .carb call jet or edlelbrock tell them what you have were you live and maybe they can get you close on a Qjet
    Irish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip

  12. #12
    medicman775 is offline CHR Member Visit my Photo Gallery
    Join Date
    Mar 2012
    Location
    Sparks
    Posts
    7

    I guess my main concern/question is that with the motor I have should I take advantage of the efi equipment I have or not deal with all the problems I could have with tbi size and tuning and just go with a carbed set up.

Reply To Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Links monetized by VigLink