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  1. HEG77k10

    New sbc 400 blueprint engine keeps fouling plugs with gas

    Af gauge will be here tmrw, changed primary’s in the meantime to 68s. I don’t see why jetting the 850 down wouldn’t work but I really don’t know what I’m doing so we’ll see what the gauge says. What afr should I be trying to shoot for??
  2. HEG77k10

    New sbc 400 blueprint engine keeps fouling plugs with gas

    72 primary’s and secondaries not sure on valve but I just opened up carb and the diaphragm looks good. Has backfired out of the carb twice and it looks like they’ve held up
  3. HEG77k10

    K10 auto to manual

    Has anyone on here converted an auto k10 to a manual? I’d like to take out the 3 speed th350 and put in a 4 speed. What are your thoughts?
  4. HEG77k10

    New sbc 400 blueprint engine keeps fouling plugs with gas

    Yeah has full 12 volts at all the plugs. Changed plug wires too bc the last ones I had got all torn up by the looms. Actually cut down to insulation. Last time I get that Cheap hard plastic clip in junk
  5. HEG77k10

    New sbc 400 blueprint engine keeps fouling plugs with gas

    Will do thx Craig
  6. HEG77k10

    New sbc 400 blueprint engine keeps fouling plugs with gas

    biggest difference vacuum vs manual secondary’s?
  7. HEG77k10

    New sbc 400 blueprint engine keeps fouling plugs with gas

    What would y’all recommend, a double pumper 750, or an avenger 750. Both Holley obviously. The avenger is quite a bit cheaper so just seeing what you guys thought.
  8. HEG77k10

    Looking for insight on a cummins swap

    Howdy, I’ve got a 91 burb with a half ton frame and 3/4 tons runnin gear (dana44 and Corp 14 bolt). The beast has a 9 inch lift in front and 11 inch in rear. It had a junk 350, last owner used rtv as a head gasket :/ ,,nuff said.bullet proofed the th400 and bullet proofed the np208c. It...
  9. HEG77k10

    New sbc 400 blueprint engine keeps fouling plugs with gas

    When I talked to a technician from blueprint he said they don’t do any tuning on the carb, idk if they use a different carb for the dyno pulls or what. I’m thinking abt getting a 750 carb. I want to daily drive this so im not super concerned with getting every last bit of hp out of it. I think a...
  10. HEG77k10

    New sbc 400 blueprint engine keeps fouling plugs with gas

    Anyone you can recommend that’s good at tuning carbs in the Washington/Oregon area?
  11. HEG77k10

    New sbc 400 blueprint engine keeps fouling plugs with gas

    Yessir that one
  12. HEG77k10

    New sbc 400 blueprint engine keeps fouling plugs with gas

    Sorry I meant leaner than the original setup.
  13. HEG77k10

    New sbc 400 blueprint engine keeps fouling plugs with gas

    The carb came with the motor, i will go double check the idle vacuum.
  14. HEG77k10

    New sbc 400 blueprint engine keeps fouling plugs with gas

    would running the stock fuel lines have anything to do with it? The return line is pretty small 1/4 hardline.
  15. HEG77k10

    New sbc 400 blueprint engine keeps fouling plugs with gas

    Yeah I’ve done lots of tuning on the carb, haven’t messed with jets tho. It actually is running pretty lean with both floats below middle.
  16. HEG77k10

    New sbc 400 blueprint engine keeps fouling plugs with gas

    I have a new blueprint engines 400 Chevy in my k10 and so far it’s fouled 3 sets of plugs. It had started missing after I drove it for a while so I checked the plugs and they were all black and sooty and smelled heavily like gas. The first thing I did was installed a fuel pressure regulator...
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