ProForm 950 air bleeds (confirmation please?)

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  1. '63GT

    '63GT Well-Known Member

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    I've been having an issue with WOT response...
    And I discovered something. The air bleeds in my main body are 32/73 (as shipped)
    Is this correct ?? by your experience ???

    specs on carb: (cause I know you'll ask )

    IFR: .033 idles good at 1/2 turn
    PVCR: .063/.063
    PV's 4.5/plug
    Emulsions: bottom to top .031, blank, .030, .028, .028
    Jets pri/sec: 88/89 (move up from 84/89) (shipped w/ 78/88 I think..)
    Shooters: 37/37 (shipped 33/35)

    I'm missing something here... kinda rattled at this point.. Thank you in advance :)
     
  2. mderoy340

    mderoy340 Well-Known Member

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    From their website

    proform 950_67202_specs.jpg
     
  3. 70aarcuda

    70aarcuda Master Hoader of SBM FABO Gold Member

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    10 jet sizes over stock in the primary side with the PV still in.....went in doubt reset back to stock...
     
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    • 68 HEMI GTS

      68 HEMI GTS Well-Known Member

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      Yea jetting is way fat on the primary. What is your issue? My first move would be to take some of that emulsion out of it. After resetting the jetting. You could also go down a bit on the HSB. Try .029.

      Guess I should ask if your tuning with an O2 meter
       
      Last edited: Aug 17, 2018
    • '63GT

      '63GT Well-Known Member

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      Thank you all ! I get to work now :)
       
    • '63GT

      '63GT Well-Known Member

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      But it does look like it was shipped with the wrong bleeds...
       
    • '63GT

      '63GT Well-Known Member

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      Easiest way to explain it is, it acts like there's no shooters in it.. as soon as I get heavy with the throttle.
      No O2's..
       
    • 68 HEMI GTS

      68 HEMI GTS Well-Known Member

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      May need more pump cam, does it have the pink ones right now? Try a set of blue 427 cams
       
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      • '63GT

        '63GT Well-Known Member

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        Don't know if I have the cams you suggested.. But I will look into it. Got bleeds coming too..
         
      • 70aarcuda

        70aarcuda Master Hoader of SBM FABO Gold Member

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        Have you pulled a plug out and looked at it?
         
      • yellow rose

        yellow rose Doctor of Thinkology.

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        That's a good question. What do the plugs look like.
         
      • '63GT

        '63GT Well-Known Member

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        ...got caught up in 'honey do's' , but that's a good question. Probably look like coal.
        Wife's left for take-out. I'll go pull a random plug. (shhhh, don't tell her :) )
         
      • '63GT

        '63GT Well-Known Member

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        Pretty wet. But I was trying something a while ago. spent some time idling. NGK BPR6ES
        CR 12.34:1

        20180817_165839.jpg
         
      • yellow rose

        yellow rose Doctor of Thinkology.

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        Yeah, it's pig rich everywhere. I can't even see a timing mark on the ground wire.
         
      • hangn0ut

        hangn0ut Well-Known Member

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        Get the idle right first. Fouled that plug idling. And the mixture screws are only half turn from seated. Secondaries open for idle same as primaries? Float level set? Throttle cable not holding carb open? Vacuum leaks? I don't think changing air bleeds will fix it. And go back to original jets.
         
      • skrews

        skrews Well-Known Member

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        I'd go back to the 78/86 jets and the 32/71 air bleeds, then try blue pump cams in the #2 hole.
         
      • 68 HEMI GTS

        68 HEMI GTS Well-Known Member

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        Absolutely not, it’s gonna take more than air bleeds, he’s chasing his tail a bit untill he can see what changes are affecting what.

        I do have a pretty good idea where I would set everything including the emulsion but wouldn’t recommend it without a Af meter. The proform will probably need TS restrictions also to really clean it up
         
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        • '63GT

          '63GT Well-Known Member

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          That's the plan, skrews! :) thanks for taking the time.
          I can't get to it til Sunday afternoon at best.
          I'll keep you posted.
          And yes, I'm doing something about those nasty plugs too
           
        • hangn0ut

          hangn0ut Well-Known Member

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          Unless you get the idle circuit squared away all you gonna do is foul another set of plugs.
           
        • '63GT

          '63GT Well-Known Member

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          The IFR is only .033. I fouled those plugs while fiddling with shooter adjustment, and having too much jet. They don't normally look like that...
           
        • '63GT

          '63GT Well-Known Member

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          Let me have it. I'll listen. There are no bad Ideas here...
           
        • 68 HEMI GTS

          68 HEMI GTS Well-Known Member

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          Let’s hear a quick rundown of the engine combo
           
        • '63GT

          '63GT Well-Known Member

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          OK.. 360 .030, 12.34:1 with small .040 quench pad, ProComps Flow 290 @ .600, W5 SP w/2" super sucker, ProForm 950 Main body, .638/.656 (with 1:6 rockers), 255/260 @ .050 108° on 103 Howards Solid, Dougs 450R headers, 3" exhaust, MSD digital 6, NGK BPR6ES plugs 35° total.
           
        • '63GT

          '63GT Well-Known Member

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          One other thing, to those who chimed in here...
          This started out as an experiment. I wanted to discover the viability of the Ebag knock-offs of the billet holley parts.. Namely, throttle plates and metering blocks. Well, not the best.

          In fact, I out-lined the throttle plates here: 750 vs 850 vs 950 Holley

          As for the metering blocks.. well, like a dumb ass, I put them in 'as shipped'. It was a pig. My modified 650 out ran it by 4mph. In frustration, cramed some jet in it, and it didn't respond well, so it landed on a shelf for 3 months.
          Once I was done being mad at it, I did an autopsy. The metering blocks were fubar. All of the replaceable jets were .025. EVERYTHING! IFR, emulsion (5), and PVCR. So, I fixed it. I copied the Quik Fuel blocks (as I outlined in a previously in this thread) but I never pulled out all that f'n jet.
          Hence, wet plugs. (that's what I get for being complacent)
          But, there's still a transition problem. The 'shooter' circuit was never meant to take place of the carbs ability to transition, but to aid it.

          This is why I ask for your opinions. If you wish to judge me, go for it. I'm too old to let that get to me. Besides, if you've never made a mistake, you aren't trying hard enough...
          Thanks, again, for ALL of your input. :)
           
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          • 68 HEMI GTS

            68 HEMI GTS Well-Known Member

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            IFR: .032 moves to lower position
            PVCR: start with the .063 untill main jetting is set for cruise
            PV' 6.5 (high flow) and plug sec
            Emulsions: top to bottom
            .028, plug, plug, .028, plug
            Jets pri/sec: Try out of box to start
            Shooters: 35/35 (high flow screws) with blue pump cams, play with the position
            IAB .071. MAB .029
            Transfer slot restriction .078-.082 to start.
            .110 N/S

            Will need an O2 meter to really tweak it from there.
             
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