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  1. Walker434

    Holley 750 DP idle question

    I've got a 71 Dart Street/Strip car with a 414 C.I. stroker and a procharger with a Holley HP converted to blow through carb. Been running this set up since 2019 with great results and doing dragweek a lot. The timing is locked at 20 degrees. Typically this setup idles great in park at 900...
  2. Walker434

    Carb Tuning with AFR Guage

    Hey guys I need some help. At wide open throttle the car is too rich at lower and mid RPM ranges. Like 10.5:1. By the time I hit 6,000 RPM its much better at like 12.0:1. This is a 360 with a procharger and Holley HP 750 converted to blow through. Running 10 lbs of boost. What would I need...
  3. Walker434

    Very Rich light Throttle Cruise AFR readings

    Hey guys, I have recently installed a Holley HP 750 carb that has been professionally converted to blow through. Recently installed a P-1SC Procharger on my 5.9 Magnum build. Also, installed a water/injection kit to keep the air charge cool. I have a AEM wideband AFR guage. My readings are...
  4. Walker434

    1/2 inch Feed and Return line recomendations

    I'm adding a Procharger to the Dart and need to upgrade my fuel system. I'm going with a 1/2 inch sending unit in the original location in the tank. I'll also be adding a bung for the return line. Using an electric pump then Need 1/2 inch feed line to the boost referenced pressure regulator...
  5. Walker434

    Need help with lean stumble on Holley DP

    My 71 Dart has a 5.9 magnum with air gap intake and Holley 750 double pumper. Has always run great but I've been fine tuning lately with an air/fuel gauge. Been really nailing down my tune trying to get 14.7ish at cruise and still keep 12.5ish at WOT. Friday night I drilled out my power valve...
  6. Walker434

    Need to upgrade Fuel System

    Okay a lot of you know I recently put a fairly mild 360 magnum in my 71 Dart. I got the timing and carb issues sorted out so then I moved on to traction issues. Last night while doing a "hole shot" I noticed 2nd gear didn't feal really strong and the engine started "surging" at about 4,000...
  7. Walker434

    Holley Tuning Help

    I have done plenty of searching and reading but I need some help. I have a 71 dart with a magnum 360 stock bottom end, comp cam (Specs below), edelbrock air gap, Holley 750 DP 4779-9, MSD billet Dist, 6 AL box and blaster 2 coil, Cheap 1 5/8 headers to 2.5 flowmasters. Comp custom grind...
  8. Walker434

    Hey Guys with Magnum Air Gap

    I am getting ready to install my Magnum 360 in my 71 Dart. For those of you that have experience with the Edelbrock Magnum Air Gap Intake Manifold: Is there a way to run my heater hose to my heater core and run a mechanical temperature gauge? I was compairing my magnum intake to my LA Weiand...
  9. Walker434

    Need a little help in advance

    Hello everyone. In a few weeks I will be replacing my worn out 318 with my Magnum 360 build. The 318 currently has a Weiand Stealth intake with a Carter AFB 625 carb. The magnum 360 that will be going in the 71 dart will have an Edelbrock Airgap manifold and a brand new Holley 750 DP. The...
  10. Walker434

    Carb vaccum leak?

    My 71 Dart 318 is making a "tea kettle on the stove" noise when it is warm at operating temperature. It has a Weiand Stealth intake and a Carter AFB 625 CFM carb. Last Sunday I took this cap off of a vaccum port on the carb down by the choke housing. With this cap removed the noise stops. If you...
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