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Anybody use the holley throttle body?

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

  1. DesertDueler

    DesertDueler 1/2 ton status

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    I was thinking of getting the holley replacement throttle body. It flows 42% more air than the factory one. I have a 454 throttle body I was going to put on my motor but was thinking of using this one, that and the 454 needs rebuilt and the holley one is only 300 bucks.

    86Jimmy 4"&35"MTRs,87 burb 4"&33"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  2. pr1aw

    pr1aw 1/2 ton status

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    I was going to post the same question tonight.
     
  3. DesertDueler

    DesertDueler 1/2 ton status

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    Anyone?

    86Jimmy 4"&35"MTRs,87 burb 4"&33"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  4. CaptCrunch

    CaptCrunch 1/2 ton status

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    yup.... Holley all the way. I plan to go that route if I run out of time planning and grooming my own port injection setup. I have asked around... the unit from Howell flows 670 cfm and has 80 lb. injectors and is $350. The turbo city bored out units are rated at 590 or so cfm and don't include injectors. Also Holleys unit is their own custom casting rather then a bored out or 454 stock unit.

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <a target="_blank" href=http://coloradok5.com/gallery/captcrunch>http://coloradok5.com/gallery/captcrunch</a>
     
  5. DesertDueler

    DesertDueler 1/2 ton status

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    I was wondering if anyone has used one recently because we used one about three years ago and it sucked. It ran too rich even on a 454 with heads,intake, and cam. I was wondering if they have changer there design.

    86Jimmy 4"&35"MTRs,87 burb 4"&33"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  6. CaptCrunch

    CaptCrunch 1/2 ton status

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    What did you do in terms of a chip or programing? I have heard the same problem that they have run rich, but not on a BBC or anything. Most of they guys said they either changed injectors or reprogramed their fuel setup. Also heard one guy just used his stock injectors and it solved his problem. This all just kinda buzz going around and such. Have you tried giving Holley a call or email?

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <a target="_blank" href=http://coloradok5.com/gallery/captcrunch>http://coloradok5.com/gallery/captcrunch</a>
     
  7. DesertDueler

    DesertDueler 1/2 ton status

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    No I havent. We were seting it up at the dyno and was trying all kinds of different programs, and different fuel pressure.

    86Jimmy 4"&35"MTRs,87 burb 4"&33"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  8. CaptCrunch

    CaptCrunch 1/2 ton status

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    I do remember a post not to far back with someone else saying their always ran rich as well here on CK5. I have really be debating the setup for the next motor pretty hard... seems like a upgraded TBI and a new chip are gonna cost as much as switching to port, plus haven't found anyone I really like for burning chips. A tpi swap wouldn't be too bad, but think overall it will die out at 4500 rpm or so. So the last alternative is custom port fi... hmmm [​IMG]

    Would be nice to just change a throttle body and be done. I know sdpd is saying the stock t-body will bolt on to numerous crates they have and make 300-350 hp. Sounds kinda fishy to me...I have kinda been leaning towards the Holley unit for the airflow and then an injector change. I calculate that with the 2 injector setup you would want about 70-75 lb. injectors to feed 300 hp. Anyone know what the stock injectors are rated at?

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <a target="_blank" href=http://coloradok5.com/gallery/captcrunch>http://coloradok5.com/gallery/captcrunch</a>
     
  9. Casey 86K5

    Casey 86K5 1/2 ton status

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    A buddy of mine bought a Holley throttle body for the 4.3 in his s-10 a few years ago, I believe it was the 670cfm version, and the throttle blades would not clear the holes on his factory intake. He ended up buying and edelbrock intake for it and it still wouldnt clear- he had the holes on the edelbrock manifold machined so they would clear the bigger throttle plates on the holley and put it on the truck. The old throttle body w/130k on it ran better than the holley unit did.

    Casey 86K5 [​IMG]
    <font color=red> -'86 K-5 350/700-R4/14 bolt rear/10-bolt front </font color=red>

    <a target="_blank" href=http://86blazer.coloradok5.com>http://86blazer.coloradok5.com</a>
     
  10. DesertDueler

    DesertDueler 1/2 ton status

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    Yea thats the same problem we ran into a while back, and thats why I was wondering if anyone has tried one recently. I need the more air flow for the hp I will be putting out, but dontwant to run rich and kill the hp at the same time.

    86Jimmy 4"&35"MTRs,87 burb 4"&33"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  11. coopertwpk

    coopertwpk 1/2 ton status

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    Ive heard better things about just installing the spacers .

    88k5 silverado w4"lift <font color=orange>d44 and corp14ff</font color=orange> with 4.11
     
  12. prjt_blzr

    prjt_blzr 1/2 ton status

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    I may not have this entirely straight but here is my .02. The holley unit flows 670 CFM. This is 42% more than the factory SBC throttle body. I believe that all BBCs came with the factory 2" throttle bores and flow about 670CFM (I have this unit on my K5). Sooooo, if you have the 2" BBC throttle body there is very little difference in air flow. In addition, the factory unit works much better than the holley in my experience.
     
  13. CaptCrunch

    CaptCrunch 1/2 ton status

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    yeah the intake will need to be worked so the holes are as big at the one on the TBI unit. Figure that should be a huge deal... just kinda a Pia doing the grinding, but it is gonna be the same deal with the 454 or bored stock unit

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <a target="_blank" href=http://coloradok5.com/gallery/captcrunch>http://coloradok5.com/gallery/captcrunch</a>
     

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