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TBI spacer with proven results

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by tori89k5, Jun 12, 2001.

  1. tori89k5

    tori89k5 1/2 ton status

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    Hey gang... Finally installed the <font color=red>POWERAID</font color=red> TBI spacer that i bought for my '89 onto my new '90 tonite. Been waiting till i got a little more used to this truck and could get some definate proof of weather it was B.S. or not.
    So here's what i did. I borrowed a racer friends <font color=blue>G-TEC PRO</font color=blue> (its for performance testing) If your not familiar with it, it will test G forces, 0-60 MPH times, 1/4 mile time, and somehow it rates HP based on vehicle weight.
    Tonite after work, on the highway coming home, i pulled over 3 times to do a standing 1/4 mile run. On dry, level pavement, no brake assitance, just put in in D and foot to floor.
    Here are the results WITHOUT the spacer:
    1. 18.30 @ 68mph
    2. 20.14 @ 64mph
    3 19.51 @ 68.5mph
    I then came home, installed the spacer and went back out to the highway. And did the exact same thing, from the same exact spot as the 3rd run.
    Here are the results WITH the spacer:
    (this time I only made two runs, on the third, THE CHP pulled up behind me as I was resetting the damn thing.)......." uh.... hello officer.... no, no problems at all..... just doing some 1/4 mile testing on your highway...."[​IMG]
    1. 18.9 @ 71.7mph
    2. 18.4 @ 73.4mph
    ....so anyway.... it is a "feelable" difference when you drive with the spacer, even under normal acceleration, It feels like your giving it a bit more throttle then you really are.
    You can see that it did pick up the MPH a good bit, and did drop the times a bit as well. If id have known how to use the thing a bit better i could have been a little more accurate im sure, but, i did everything equal... so i guess that counts for something. I will report later and let you know if it makes a noticeable MPG change. Id recommend it to you F.I. K5'ers



    New '90 K5 sitting in my driveway !!! YIPPPIEE !!
    <A target="_blank" HREF=http://www.tori89k5.coloradok5.com>http://www.tori89k5.coloradok5.com</A>
     
  2. CaptCrunch

    CaptCrunch 1/2 ton status

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    Very interesting, but those Gtec's aren't worth a cat meow in my experiences with them. Very unrelaible data when we have compared it with an actual engine dyno... plus the higher top speed times would suggest a gain in the upper rpm ranges more then torque. I considered it long and hard and poked around, but for 100 bucks I think there are better mods out there... such as a MSD coil, good plugwires and some over gapped plugs. I think those fuel injector spacers would be worth a shot just because scientifically it makes sense... easier for the air to get in and they are only $20. Just MO though. Keep us posted on the milage aspect... that would be more interesting I think then the actual performance asspects.

    Hey Tori... so w/ the old burn out pics and now quarter times... when's the Blower and set of 35" drag slicks gonna go on [​IMG] LOL.

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <A target="_blank" HREF=http://www.geocities.com/milnerlives_2000/blazer.htm>http://www.geocities.com/milnerlives_2000/blazer.htm</A>
     
  3. jarheadk5

    jarheadk5 1/2 ton status

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    Hey CC, where'd you see a TBI spacer for $20?

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  4. Bubba Ray Boudreaux

    Bubba Ray Boudreaux 1 ton status

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    this time I only made two runs, on the third, THE CHP pulled up behind me as I was resetting the damn thing.)......." uh.... hello officer.... no, no problems at all..... just doing some 1/4 mile testing on your highway...."
    Should of challenged him to a "last one to the donut shop buys" race. :O)

    "Liberals ain't mean, they just don't have any common sense!"
     
  5. Thunder

    Thunder 3/4 ton status

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    The spacers the Captain is talking about is an injector spacer not the TBI spacer. The injector spacer raises the fuel injector up a little higher over the throttle body thus giving more space for air to get through. <A target="_blank" HREF=http://www.turbocity.com>http://www.turbocity.com</A>sells them for $19.95.
     
  6. Twiz

    Twiz 1/2 ton status

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    tori89/90k5

    Whana know why?
    A T.B.I. or carb spacer increases plenum volume under the throttle blades and improves airflow into the manifold

    Also, If you watch the throttle blades on the T.B.I. or Q-Jet, you will see that the blades open towerds the rear of the engine, directing flow to the rear cyls. On a dual plane manifold, no. 2 cyl and no 3 cyl can run lean in a part throttle application, because the fuel in the air charge is thrown out of the air stream. The fuel just can't cut the turn around the throttle blades into the two forward and top runners like the air can. (can you picture that?) So, of the 8 cyl, two maybe lean.

    This therory applies to part throttle, not WOT or high vacume conditions, the throttle blades are streght up and down in WOT. and In high vacume conditions, the fuel "should" be vaporized enuff to cut the turn (lower pressures lowers the boiling point of a liqiud) But thats all just general therorys,.

    wether a carb or T.B.I. spacer acualy works is a hitt or miss, you have to try them and see if it works. It all depends on the combo.

    Twiztid
     
  7. jarheadk5

    jarheadk5 1/2 ton status

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    Ahhh, after re-reading, I see my mistake. Ooops![​IMG][​IMG]
    OK, so these INJECTOR spacers DO work??

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  8. tori89k5

    tori89k5 1/2 ton status

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    Hey Mikey.... not to contradict you too much.... but think about this a bit... Highrise Intake manifold or TBI Spacer ?
    pretty much the same concept... and we all know they work.
    also... TBI spacers arent $100 even the good ones arent that much... especially if you get hooked up with Keith Panza from here.... thanks again Keith....
    Anyhow.... lets take it to the strip [​IMG]


    New '90 K5 sitting in my driveway !!! YIPPPIEE !!
    <A target="_blank" HREF=http://www.tori89k5.coloradok5.com>http://www.tori89k5.coloradok5.com</A>
     
  9. CaptCrunch

    CaptCrunch 1/2 ton status

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    Yes Tori they do work... at 4500 rpm!!!! Like powershifting that new rig of your's ? LOL I see no point in trying get gains over 3,000 rpm in a truck or even a street only motor because these motor never see that much rpm. A key reason why most of the crate motors out there aren't all that great for a truck. For a 6,000 LB. Box of rocks w/ the aerodynamics of a skyscraper you want some serious torque to help get her moving. Now obviously this isn't all of it, but you even said so yourself that Gtec thing sshowed higher miles per hour which w/ the small ET gains is upper rpm. Plus then you have to throw in the equasion of traction... I know my 87 could spin the stock tires if I nailed it even w/ 3.08's. I would be seriously interested in either a actual dyno run before and after or some drag strip times that compare 60 ft. times. BTW.... where are the pics of the new truck doing burnouts? [​IMG] Keith is great... gonna get a 140 Powermaster from him when I get paid on Fri. to satisfy my power hungry stereo [​IMG]

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <A target="_blank" HREF=http://www.geocities.com/milnerlives_2000/blazer.htm>http://www.geocities.com/milnerlives_2000/blazer.htm</A>
     

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