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Advise on TBI Spacer

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by K5Freak, Feb 1, 2001.

  1. K5Freak

    K5Freak Registered Member

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    I am looking to put a TBI spacer on my 90 blazer. The are several spacers out there and I was wondering who has tried which ones. I am leaning towards the Poweraid or the TD Performance.
    My engine is a stick 350,with custom dual exhaust, Hypertech chip, and plans for JBA headers.
     
  2. fr8train

    fr8train 1/2 ton status

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    This was diiscussed awhile back. I dont run one but wanted to know too. Do a search on TBIT SPacer here on the site. the option for it is at the top to the right of main index. You will find a lot on it.

    " What day is today?....Febuary.....Its nudie magazine day!!!!!!!! " - Billy Madison
     
  3. HarryH3

    HarryH3 1 ton status Author

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    I personally think they're selling snake oil. I wouldn't part with $70 or so for one of them. I'm pretty skeptical that they can make much of a difference on a stock engine. For $20 it might be worth a shot. That's about the cost of a carb spacer. For some reason they seem to think a TBI spacer is worth $50 more. Can't cost any more to make 'em.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
     
  4. dyeager535

    dyeager535 1 ton status Premium Member

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    This is yet another product I'd like to see dyno testing on. With this product, and no other modifications, you are increasing the distance that the fuel has a chance to drop out of suspension, which is the SAME problem you have with carburetors...every bend and lip reduces the effectiveness of the mix of air/fuel. Thats one of the reasons TPI is more effective. On top of that, if the spacer bypasses the divider, the cylinders will try and "steal" the charge from the cylinder it is destined for.

    I don't have TBI, so I may be way off base about the intake manifold design though. FWIW

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     
  5. realsquash

    realsquash 1/2 ton status

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    You read my mind exactly. Save your money.

    Squash
    <A target="_blank" HREF=http://www.trailrunners4x4.org/users/realsquash>http://www.trailrunners4x4.org/users/realsquash</A>
     
  6. baby blue

    baby blue Registered Member

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    i put one on a 3/4 ton burb with a 350
    and got a noticeable torque gain..worth it!!!!!!!!

    babey blue
     
  7. blazer72

    blazer72 1/2 ton status

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    I put one on my 93 burban and got about 1.5 mpg gain. It works by smothing out the air flow. If you use a timing light to look at your spray patern with the motor runing you can see that the spray bonces back off the air door and the insides of the main body. The spacer cuts down on this! And you can see it with the timing light. You can get them for less than the 70 bucks oe you could just stack 3 or 4 gaskets there to get the samething.
     
  8. 82K5

    82K5 1/2 ton status

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    there is a comprehensive article and test of about 10? different sized spacers in the latest issue of car craft magazine. from what i read, some spacers didn't help much for their application, but other spacers helped quite a bit. they show that there is quite a difference in the sizes of the spacers and the way the spacers are cut or grooved or whatever it's called. read it for yourself. it might help you make up your mind.

    Phil from K.C.
    1982 K5 Silverado Blazer
    Built in Flint, Michigan-January 1982
    Kansas City = Great B-B-Q.
     

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