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Thread: 7.4 Tbi Cfm

  1. #1
    Legend TrailLeadr has a reputation beyond reputeTrailLeadr has a reputation beyond repute
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    Default 7.4 Tbi Cfm

    Do any of our racers, or ex-racers have a ballpark idea of how much cfm the stock TBI will flow on the 7.4l engine?
    I've tried to look up the part number listed on the TBI, but I come up with nothing.

    I'm not looking to modify it, or change it out, but I want to input the right figures in my desktop dyno, so I can get an idea of what kind of improvement I should expect from my rebuild.
    Patrick
    Rhode Island


  2. #2
    Legend 84fiero123 has a reputation beyond repute84fiero123 has a reputation beyond repute
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    I think there is a site that rebuilds injectors, I remember someone sending his in on my Fiero forum. I believe they have specs. For all types of injectors on their site.

    I’ll go see if I can find the link, just may take some time. If I don’t forget what I went over there for. lol

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  3. #3
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    I believe this is the place but I really didn’t look to see what info was available, so you will have to do a search to see.

    They are reasonable though when you consider the average price of a new injector is $150

    http://www.accurateis.com/

    Technology is great, when it Works,
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    79 GMC pickup plow truck, 400, Full time 4X4, Auto
    86 Pontiac Fiero SE, 2.8L, Auto, only mid engine American car
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    15 year GM assembly line worker.

  4. #4
    Legend TrailLeadr has a reputation beyond reputeTrailLeadr has a reputation beyond repute
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    I appreciate it.
    If you find it it will be more than I've found so far.

    I've seen a lot of replacement/upgrade TBI sites, and I was hoping to catch a statement of "flows __% over stock" At least then I could get an idea of what the stock figures are. But no one seems to make that kind of statement. Just my luck...
    Patrick
    Rhode Island


  5. #5
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    Quote Originally Posted by TrailLeadr View Post
    Do any of our racers, or ex-racers have a ballpark idea of how much cfm the stock TBI will flow on the 7.4l engine?
    I've tried to look up the part number listed on the TBI, but I come up with nothing.

    I'm not looking to modify it, or change it out, but I want to input the right figures in my desktop dyno, so I can get an idea of what kind of improvement I should expect from my rebuild.
    I've never really looked for it but it looks to be around 500 CFM



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  6. #6
    Legend TrailLeadr has a reputation beyond reputeTrailLeadr has a reputation beyond repute
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    Quote Originally Posted by Cableguy View Post
    I've never really looked for it but it looks to be around 500 CFM
    That's kind of what I was thinking, but I was on Ebay and someone was offering a "high flow" that ran around 590cfm, and it said it could support up to a 406CI engine max.
    Patrick
    Rhode Island



 

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