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  • Users: cabledog
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  1. C

    Holley secondary blade adjustment

    Hello. I need to adjust the vacuum secondary throttle blades to allow more air in so I can close down the primaries. How far can I go before engaging transition slot? Is it the same as primaries with the square method? Does the transition slot pull fuel at idle or only when the secondary vacuum...
  3. C

    Fuel pump size

    Hello again. So I ordered a fuel pump to replace on my 1971 383 magnum but I double checked and it was only 20 gph with 6 psi max. I cancelled it and ordered one that is 120 gph 6-7 psi max. Holley said I needed at least 80 gph. Would the 20 gph have worked? Holley 750 292 cam but otherwise...
  4. C

    Help spark plug reading

    Hi all new member here. Need a little help with some spark plug readings. The second photo is the plugs that have been in the car for a long time. I replaced them with autolite 85s. The new plugs to me look lean or hot. The only two things that changed are I put primary jetting to 76 from 72...
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