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.

TBI spacer

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by maddog, Apr 7, 2001.

  1. maddog

    maddog Registered Member

    Joined:
    Mar 15, 2001
    Posts:
    12
    Likes Received:
    0
    Location:
    MISSOURI
    I put on the TBI spacer last night, man what a difference! Ive never spent a better 70 bucks. It gave me more power on hills, more low end more every thing. I highly recomend it to any one whos having the 700-R4 downshift problems or just needs more oomph, and who doesnt need more of that?

    Hind sight is always 20:20
     
  2. wayne

    wayne 3/4 ton status

    Joined:
    Feb 1, 2001
    Posts:
    6,178
    Likes Received:
    0
    Location:
    Carlisle, Pa
    I am thinking of getting one in the future so which one did you get. I just rebuilt my TBI today and that made a differance with how it runs. Was there any problem when you hooked up the fuel lines in the back.

    <A target="_blank" HREF=http://jamonline.homestead.com/fromthegroundupK54x4/89Jimmy.html>http://jamonline.homestead.com/fromthegroundupK54x4/89Jimmy.html</A>
    <font color=blue>Happy Trails<font color=blue>
    <font color=blue>Wayne<font color=blue>
     
  3. CaptCrunch

    CaptCrunch 1/2 ton status

    Joined:
    Feb 2, 2001
    Posts:
    3,596
    Likes Received:
    1
    Location:
    Minnesota
    which spacer did you pick up? Airraid? Turbo city? Not sure if I believe all the hype on those. I am gonna get one of those injector spacers... that makes sense in allowing better air flow... and is only 20 bucks

    [​IMG]
    1987 Chevy K5 Blazer- 350 TBI
    <P ID="edit"><FONT SIZE=-1>Edited by CaptCrunch on 04/07/01 08:14 PM (server time).</FONT></P>
     
  4. blazen91

    blazen91 1/2 ton status

    Joined:
    Sep 10, 2000
    Posts:
    1,738
    Likes Received:
    0
    Location:
    Hesperia, Ca 92345
    I did one on mine also. I would defenetly suggest one. I haven't checked the milage, but the power is alot better. I got mine from Jegs. I am wondering how the injector spacers wil work with the TBI spacer.

    <A target="_blank" HREF=http://www.blazen91.coloradok5.com>http://www.blazen91.coloradok5.com</A>
    Protect the land FOR the people
    Not FROM the people
     
  5. CaptCrunch

    CaptCrunch 1/2 ton status

    Joined:
    Feb 2, 2001
    Posts:
    3,596
    Likes Received:
    1
    Location:
    Minnesota
    Well looking at the TBI unit... it always has seemed stupid for this big injector to be in the way... so theoretically(sp?) raising it up about a quarter to half inch will let more air in. This makes sense to me... maybe someone can explain how the tbi spacer is suppost to make more power? None the less make $70 of power? I'm open to any ideas on the subject...

    [​IMG]
    1987 Chevy K5 Blazer- 350 TBI
     
  6. maddog

    maddog Registered Member

    Joined:
    Mar 15, 2001
    Posts:
    12
    Likes Received:
    0
    Location:
    MISSOURI
    I got the trick flow spacer, dont know why it works but it sure does. No problems with the fuel line, but I had to put an extra return spring to keep the throttle from sticking, I could have bent the bracket, but it was easierto just put the spring on
    -Mad Dog

    Hind sight is always 20:20
     
  7. 88K5Jimmy

    88K5Jimmy 1/2 ton status

    Joined:
    Jan 10, 2001
    Posts:
    1,323
    Likes Received:
    0
    Location:
    Tulsa OK
    Did the return spring come with the spacer? How did you firgure out you needed another spring?
     
  8. blazen91

    blazen91 1/2 ton status

    Joined:
    Sep 10, 2000
    Posts:
    1,738
    Likes Received:
    0
    Location:
    Hesperia, Ca 92345
    Well lets do some math..... They claim a 8% gain in milage. So, I put about 2000-3000 miles a month(yes a month) on my Blazer. 8% of 2500 is 200 more miles from a month. Gas at $1.50 per gallon X at 12 miles to the gallon is $.13 per mile. $.13 X 200 miles is $26.00. So if I did the math right, my TBI spacer will pay for itself in 3 months.

    If I screwed up the math, please feel free to correct me.

    The faster you can get air into the engine, the better it will flow through the engine. Making the engine run easier, so you can push it more. By raising the TBI, you increase the flow speed of the fuel. Look at Pro Street Drags. The manifolds on those suckers are huge. Fuel flow into the engine is very fast. The faster in, the faster out, the more horse power. It's like headers. They allow the exhast to breath, this allows the intake to breath. I think you are correct about moving the injecters to open up the bore, though.

    Does anyone have a link to a pis of the injector spacers?

    <A target="_blank" HREF=http://www.blazen91.coloradok5.com>http://www.blazen91.coloradok5.com</A>
    Protect the land FOR the people
    Not FROM the people
     
  9. Thunder

    Thunder 3/4 ton status

    Joined:
    Jul 20, 2000
    Posts:
    8,946
    Likes Received:
    1
    Location:
    Northeast Nevada
    These guys have a lot of trick stuff for TBI <A target="_blank" HREF=http://www.turbocity.com/TBIPowerMain.htm>http://www.turbocity.com/TBIPowerMain.htm</A>
    I'm using the TBI spacer and the Injectors and injector spacer. Their stuff works very well.
     
  10. CaptCrunch

    CaptCrunch 1/2 ton status

    Joined:
    Feb 2, 2001
    Posts:
    3,596
    Likes Received:
    1
    Location:
    Minnesota
    Performance CLAIMS mean nothing really... sometimes seats of pants feel can be misleading... you just put in something so wow it seems faster... Not trying to knock ya or anything... just it is the placebo effect kinda thing. I'd be interested to know the long term results. For example ever since I've had my truck it has gotten 10 to 11 mpg... put in a K&N filter, msd offroad ignition, plug wires, coil, and plugs gapped at .045 about 2 months ago... was 10 to 10.5... well then a few weeks back pulled the plugs and gapped them at .060... just filled up yesterday and for the 3rd time in a row it has been 12.5 mpg or higher... Here is a pic of the spacer [​IMG] They raise it up 1/4" and go for about $20... Turbocity has them.

    [​IMG]
    1987 Chevy K5 Blazer- 350 TBI
     
  11. 89Blazin

    89Blazin 1/2 ton status

    Joined:
    Mar 20, 2001
    Posts:
    134
    Likes Received:
    0
    Location:
    midwest KC area
    Trick flow spacer....who'd you buy it through?

    85 Burb and an 89 Blazer
    One just for fun, one simply for pleazer
     
  12. mattman

    mattman 1/2 ton status

    Joined:
    Feb 15, 2001
    Posts:
    152
    Likes Received:
    0
    Location:
    Austin, Texas
    Read somewhere where the spacer increases the plenum volume. Kinda like putting a bigger intake manifold on.

    90 GMC Jimmy, 350 TBI, 700R4, 32's
    84 Bronco II 204,000 miles and counting...........
     
  13. ftn96

    ftn96 1/2 ton status

    Joined:
    Sep 26, 2000
    Posts:
    3,238
    Likes Received:
    0
    Location:
    Nashville Tn
    Any other adjustments that have to be made after installing the spacer??
    Or is it just a bolt on and go type thing?

    Will work for beer, parts and tools.
    90 Jimmy 350TBI-700R4-241-33" BFGs-10 bolts w/4.10's
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     

Share This Page