Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

So should it be a 78 or an 87...

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by reddog64, Dec 9, 2003.

  1. reddog64

    reddog64 1/2 ton status

    Joined:
    Nov 9, 2000
    Posts:
    3,325
    Likes Received:
    0
    Location:
    Federal Way, Washington
    I've owned a 74 k-5, a 78 k-5 and a 78 k-20...
    Loved em all...

    Well there all long gone and i got the 4x4 bug again...

    I've never owned a FI (87+) CHEVY...

    Will I have any good benefits to go FI over a carbed 78?
    besides being fuel injected, and having to swap to a th350/400 to be happy with it...

    - Is FI really worth it??? /forums/images/graemlins/confused.gif
     
  2. camiswelding

    camiswelding 1/2 ton status

    Joined:
    May 25, 2003
    Posts:
    2,545
    Likes Received:
    0
    Location:
    Redding, CA
    gas mileage...
    my 89 version gets 15 mpg... my 81 ...10
    tbi really makes it smooth to drive
    downside... harder to work on... more sensors and stuff...
    I think if I was in a non smog state and could de smog the truck and make it run well Id probably go for the earlier model..
    my 2 cents
     
  3. Bubba Ray Boudreaux

    Bubba Ray Boudreaux 1 ton status

    Joined:
    Jan 21, 2001
    Posts:
    20,716
    Likes Received:
    2
    Location:
    Undisclosed Location
    [ QUOTE ]
    I've owned a 74 k-5, a 78 k-5 and a 78 k-20...
    Loved em all...

    Well there all long gone and i got the 4x4 bug again...

    I've never owned a FI (87+) CHEVY...

    Will I have any good benefits to go FI over a carbed 78?
    besides being fuel injected, and having to swap to a th350/400 to be happy with it...

    - Is FI really worth it??? /forums/images/graemlins/confused.gif

    [/ QUOTE ]

    FI rocks. I love it and it's not that hard to work on.
     
  4. rcpilot

    rcpilot 1/2 ton status

    Joined:
    Feb 22, 2002
    Posts:
    507
    Likes Received:
    0
    Location:
    Central Cali
    True FI has better mileage and smoother operation... but I love the simplicity of my '76... /forums/images/graemlins/thumb.gif Edelbrock mani and carb...Put in an off-road needle seats and it too will run great... simple to work on both in the garage and on the trail w/ cheap parts abound.. my .02
     
  5. Thunder

    Thunder 3/4 ton status

    Joined:
    Jul 20, 2000
    Posts:
    8,946
    Likes Received:
    1
    Location:
    Northeast Nevada
    If you want to go with a newer K5 try to find a 88 or newer. The trannys have all the upgrades and you wont need to swap in an older 3 speed. You really wont gain anything by putting in a th350. In my opinion the later model 700r4/4l60 is just as strong as a TH350.
    By putting in a older trans you will loose gas milage gains that the OD gives you.
    Also 700s have lower 1st gear than TH350/400
    Other Advantages of FI are Better drivability.
    More Horsepower/torque than stock carbed II Gen Blazers
    No carb issues(flooding. hard starting, ect)
    Better performance off road.
    The main disadvantage is all the electronics. You will need to learn how to work on it. A good scanner is definatly a must have ( AutoXRay 150 bucks). Once you get them figgured out they are really not very hard to work on. With a scanner the ECM usually will give you all the info you need to get problems solved.
    I perfer FI over a carb any day. I used to say "I would never own a Computerised FId vehicle". But since I have learned the in and outs of OBD1 and OBD2. They are all I will drive. I have no desire to go back to the stone ages and deal with a carb again. FI is just too reliable.
     
  6. Steve_87K5

    Steve_87K5 1/2 ton status

    Joined:
    May 26, 2000
    Posts:
    521
    Likes Received:
    0
    Location:
    central NC
    I agree w/thunder. I have owned an '80 K5, an '85 K5 and now a TBI '87 K5 with 300 000 miles and getting 15mpg. I have had to replace the fuel injectors and one temp sensor. Working on a throttle body is simple. That is the full extent of the FI maintenance in all those miles. My main complaint is the fuel pump inside the gas tank (they fall off under hard use, and repl while on a trip is no fun). I replaced it with an external fuel pump: Mallory 4060FI mounted on the inside frame rail. I have a DOS program and an old 286 laptop which is now used just to read the FI and can record everything to a floppy.
     
  7. reddog64

    reddog64 1/2 ton status

    Joined:
    Nov 9, 2000
    Posts:
    3,325
    Likes Received:
    0
    Location:
    Federal Way, Washington
    So the 700r4 was "fixed" as best they could by 88..
    so If I look for an 88-91 It's bound to have a "better" 700r4 a 241 and be FI...
     
  8. jjlaughner

    jjlaughner 3/4 ton status

    Joined:
    Jan 12, 2001
    Posts:
    7,406
    Likes Received:
    0
    Location:
    Indiana
    [ QUOTE ]
    So the 700r4 was "fixed" as best they could by 88..
    so If I look for an 88-91 It's bound to have a "better" 700r4 a 241 and be FI...



    [/ QUOTE ]

    87 up blazers/subs are the updated 700r's with EFI
    241's came in 88
    So you be good to go with 88-up if your wanting the 241 /forums/images/graemlins/thumb.gif
     
  9. TruckNutzDude

    TruckNutzDude 1/2 ton status

    Joined:
    Mar 31, 2003
    Posts:
    3,532
    Likes Received:
    0
    Location:
    Agawam, MA
    I'd look for an '88-'89 because the '90-'91's had electronic speedometers and rear antilock brake systems. I traded my '90 blazer for an '89 for those two reasons (plus the guy traded me a set of 1 ton axles and my lift kit from my '90 /forums/images/graemlins/shocked.gif how could I say no /forums/images/graemlins/cool.gif)
     
  10. reddog64

    reddog64 1/2 ton status

    Joined:
    Nov 9, 2000
    Posts:
    3,325
    Likes Received:
    0
    Location:
    Federal Way, Washington
    so 88-89 has an updated 700r4 and the 241.. with NO ABS crap in the back...

    Sweet...

    Guess the hunt begins for a 88-89 K5...

    /forums/images/graemlins/smile.gif /forums/images/graemlins/cool.gif /forums/images/graemlins/grin.gif /forums/images/graemlins/deal.gif
     
  11. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

    Joined:
    Dec 14, 2001
    Posts:
    22,063
    Likes Received:
    71
    Location:
    Pleasanton, CA.
    241's did not come until 1989 and was the only year with mechanical speedo. If you did decide to swap a TH350 into the vehicle you would fail a smog check since you would pull a code for TC lock-up since there would no longer be a lock-uo converter. I had to remind Dunerunner about that and he checked with the local Referee and they said the same thing, it WILL FAIL smog because of it.
     
  12. TruckNutzDude

    TruckNutzDude 1/2 ton status

    Joined:
    Mar 31, 2003
    Posts:
    3,532
    Likes Received:
    0
    Location:
    Agawam, MA
    [ QUOTE ]
    241's did not come until 1989 and was the only year with mechanical speedo

    [/ QUOTE ]

    Sweet... I learned something too today. I guess I got really lucky /forums/images/graemlins/thumb.gif (sorry for rubbing it in /forums/images/graemlins/wink.gif)
     
  13. reddog64

    reddog64 1/2 ton status

    Joined:
    Nov 9, 2000
    Posts:
    3,325
    Likes Received:
    0
    Location:
    Federal Way, Washington
    man you guy's are really cutting it down.. so now it's an 89...

    what if i find a 90 or 91.. can i ditch the back abs so i can do a disc conversion... (i would do a 8 lug conversion 14bff...)
    I'd keep the 700r4...
     
  14. TruckNutzDude

    TruckNutzDude 1/2 ton status

    Joined:
    Mar 31, 2003
    Posts:
    3,532
    Likes Received:
    0
    Location:
    Agawam, MA
    In all honesty, I didn't even know my abs was there. My master cylinder was toast to begin with and I figured after my 3/4 ton swap I'd just put a 3/4 ton master cylinder in it... never got around to it though /forums/images/graemlins/rolleyes.gif I traded it off to a friend of mine instead (and he still hasn't fixed it) I think you can swap it out... I could have just said that to begin with.
     
  15. bryguy00b

    bryguy00b 3/4 ton status

    Joined:
    Apr 7, 2002
    Posts:
    5,587
    Likes Received:
    0
    Location:
    Rochester, N.Y
    defenetly go with a TBI this time..i know my next truck is..im kinda sick and tired of carbs and shitty milage and them F-ing up all the time, but they can work great, ive just had bad luck with my truck, but my dads 79..man that carb hasnt been messed with in YEARS and its been just fine....i too used to say the only thing i would ever drive was a nice simple carbed truck, but after a few experiences with my k-10, and seeing how some of the TBI trucks work and learning more about them i really want to get away from carbs now..kinda looking forward to driving my s-10 now just cause its TBI...dont gatta sit there and warm it up or any of that chit
     
  16. reddog64

    reddog64 1/2 ton status

    Joined:
    Nov 9, 2000
    Posts:
    3,325
    Likes Received:
    0
    Location:
    Federal Way, Washington
    that's what I'm thinking...

    I want more of a D/D this time around too...
    Dont get me wrong i liked camo and 39.5's but they sucked around town...
    /forums/images/graemlins/ignore.gif
     
  17. bryguy00b

    bryguy00b 3/4 ton status

    Joined:
    Apr 7, 2002
    Posts:
    5,587
    Likes Received:
    0
    Location:
    Rochester, N.Y
    yea i hear ya..i rather be driving my big chevys anyday..but the gas prices on the s-10 are to atractive to pass up
     
  18. jwduke

    jwduke 1/2 ton status

    Joined:
    Aug 25, 2001
    Posts:
    721
    Likes Received:
    0
    Location:
    Ice Cream Capital of the World, IA.
    Isn't the ABS, rear wheel only, on 90 & 91's? That shouldn't be too hard to discomboobalate.
     
  19. Confedneck

    Confedneck 3/4 ton status

    Joined:
    Nov 1, 2002
    Posts:
    5,236
    Likes Received:
    0
    Location:
    Lehigh Acres, Florida
    if you unplug the abs sensor, or cut the wires, the pump wont know to assist the braking..voila /forums/images/graemlins/thumb.gif
     
  20. TruckNutzDude

    TruckNutzDude 1/2 ton status

    Joined:
    Mar 31, 2003
    Posts:
    3,532
    Likes Received:
    0
    Location:
    Agawam, MA
    [ QUOTE ]
    if you unplug the abs sensor, or cut the wires, the pump wont know to assist the braking..voila

    [/ QUOTE ]

    and the brake light comes on so you can't get an inspection sticker /forums/images/graemlins/thumb.gif
     

Share This Page