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Kudos to CPG re: FAST EZ EFI 1.0

Discussion in 'FAST Support Forum' started by Cre8vtv, May 7, 2017.

  1. Cre8vtv

    Cre8vtv Member

    Joined:
    Jun 12, 2011
    Great insights and thank you. You've been so helpful through this process. I will look for a local speed shop that can do HEI distributors. I do have vac advance as well and will explore if there is a way to limit it a bit. I've seen that before. The squeal was a belt at first, which i add some slip grease to and it quieted. I did however seem to tear up the TACH gear, as my mechanical tach is no longer functioning. Perhaps time to switch to electronic... or see if I can find the parts to rebuild it.
     
  2. Cre8vtv

    Cre8vtv Member

    Joined:
    Jun 12, 2011
    Hi AGAIN AA. I have one additional question for you. I'm backing down the advance from 20 to about 16 to stop the ping on the load rpms. I have added heavier springs and lighter weights in my Performer MSD Distributor. I'm liking what I'm feeling with the car, but wondered if I have the Vacuum advance hooked up wrong. Currently I'm on the lower port on the fuel in / out side of the EZ EFI 1.0 unit. I believe that's direct manifold vac. I understand there is one port which is "PORTED" and that may be a better choice for advance and timing curve on load. Which port on the EFI unit is the ported? Is it above the blades? Is this a good idea?
     
  3. Cre8vtv

    Cre8vtv Member

    Joined:
    Jun 12, 2011
    Thank you. Can you point me to where to look on the EZ EFI 1.0 unit for the 3rd port? I see one at the base of unit on the Fuel In/Out, TPS side which is the one I'm currently tapping. There's another under injector #4 which I have capped. It's at the same base level as the one I'm tapping. So I'm thinking there's another port higher above the blades, but not seeing it?
     
  4. Cre8vtv

    Cre8vtv Member

    Joined:
    Jun 12, 2011
    Thank you. Found them. Two full time (one to regulator, one capped) One above the blades (Part Time) in front of the TPS which was connected to regulator and is now connected to my Vac Advance. Hopefully this will improve things further.
     
  5. Cre8vtv

    Cre8vtv Member

    Joined:
    Jun 12, 2011
    Hi AA, First, many thanks for all your terrific insight on my EZ EFI fix and tune. I have the car running pretty nicely now, with the exception of a few minor concerns: I have about 60 miles on the tune.

    1) When I am coming up to a stop and disengage the clutch the idle drops down to about 300 and then recovers back to 750-800. Can you advise a setting somewhere that might work to adjust this? Remember I'm at High Alt. Denver. 5300ft.

    2) Still dealing with a little heat... I've had to add back in the mechanical fan along with the electric fan. Temps range from 190 - 210. Of course its 95 out. : )

    3) Since setting up at the targets you suggested earlier, the car is running pretty well, however, I'm noticing a little fuel smell at stop lights after a highway run. It used to have no smell.

    4) After a good 30 minutes on the road, I notice at stops with clutch to the floor that the engine acts likes it's searching for proper idle. It rolls between 750 and 500... then if I park, take it out of gear and let it idle for a about 2 mins, it seems to find a solid 750 and holds nicely.

    Any thoughts or tweaks to settings you can advise ? My gratitude for your continued help.
     
    Last edited: Jul 9, 2017
  6. Cre8vtv

    Cre8vtv Member

    Joined:
    Jun 12, 2011
    Thanks. I've now got the A/F idle at 14.2 which it seems to like. I haven't pulled the plugs yet as I haven't had time to drive it much. I'd like to hear your opinion on an additional tweak if you have a moment... My fuel pump gets very noisy after it's hot. It's the classic EZ EFI pump (Carter or Welbro). I have it hooked up correctly with a post filter and its mounted below the tank on a custom cushioned plate etc... but still makes me a bit crazy with its whine after a long drive. My thought is this: Spend the money and replace with a Holley 12-600 Quiet Flo gear driven pump with 100 pre filter and 10 post filter. The specs say it's good for up to 85PSI and 65GPH, so it seems well within my need (GM 350) Do you have any other pumps or ideas to suggest? I was also looking at the Boesch 044 as a simpler smaller option. It seems the key is that they should be gear driven vs vein. Much appreciated.
     
  7. Cre8vtv

    Cre8vtv Member

    Joined:
    Jun 12, 2011
    Thank you. I will investigate and try this...
     
  8. Cre8vtv

    Cre8vtv Member

    Joined:
    Jun 12, 2011
    Thanks AA. I'm a little nervous dealing with in-tank set up, although I'm sure it's probably easier than I imagine. I don't like fooling with electricity and fuel in combination! : ) The two I'm thinking of experimenting with are: New Walbro GSL 392 with 40 micron pre filter and 10 micron post filter like you advise. I'm also considerng the overkill solution of the Holley 12-600 Quiet Flo gear driven pump with Earl's 100 pre filter and Earl's 10 post filter. While I know it's bulkier in size, it seems like it would turn the odds in my favor against any noise potential in the future. Trying to make the decision.
     
  9. Cre8vtv

    Cre8vtv Member

    Joined:
    Jun 12, 2011
    Thanks. I'll do some investigating into this... Might be a smart way to go. I do have easy access to the sender unit at the bottom of the tank. It's a standard "brand new" 64 corvette tank, with filler on top, a return feed on the side (which could be capped off) and then the sender unit and connections on the bottom of the tank (large round plate with feed lines in/out and sender electrical connection. I'll do some googling to see if I can find a unit that matches it with the right fuel pump built in...
     
  10. potvinguy

    potvinguy Member

    Joined:
    Jul 1, 2012
    I am running ez1.0 on a crate SBC, too. Initial advance 20, speed 15 and full vacuum 15, and it purrs like wife after a box of wine. Fuelab pump and 529 regulator combo that controls pump speed so it isn't running like crazy all the time.
     
  11. potvinguy

    potvinguy Member

    Joined:
    Jul 1, 2012
    MSD 8394 is an electronic dist; no springs, bushings or vacuum pot. Just set switches for curve you want.
    Make that crappy HEI into a table lamp.
     
  12. Cre8vtv

    Cre8vtv Member

    Joined:
    Jun 12, 2011
    So I went with the 12/200 Holly Quiet Flow and 10 / 100 micron filters around it. Built a custom mounting plate for it to sit cushioned right under the tank. It's completely silent and everything seems to be really happy. While I'm still running all the settings you've suggested and PSI is consistent at 43PSI, I'm noticing a very slight bump or hesitation when I'm driving at a steady 2000 ish RPM around 40-50MPH. It happens about every 10 seconds and it feels very slight. My pedal position is steady, but there's a slight feeling like a missed cylinder... Could this be an air/fuel mixture tweak ? Looking forward to your thoughts.
     
  13. Cre8vtv

    Cre8vtv Member

    Joined:
    Jun 12, 2011
    New question! You folks have been so good at helping me work with this, I'm hoping for some insight on this issue. I recently parked my Vette in storage after driving home in a huge rain storm. About 2 months later I went to prep it for winter. When I went to start the car, I heard the fuel pump (Brand new) pressurize the system as normal before I turned the engine over. I don't recall hearing the jets do their initial prime, so it's possible they didn't. I turned the engine over and usually I get an instant start. This time I got no spark, no start, just normal cranking. Tried this several times with no results. Looked at the FPR and its showing no pressure. NOW, I'm not hearing the Pump going on with key. ??? What places should I check? Is it possible the ECU is not working or shut down due to a fault I can clear? Could it be the Fuel Pump relay? (thinking it got wet and now its stuck) Thoughts on solutions and steps?
     
  14. fabr

    fabr Member

    Joined:
    Jan 23, 2017
    Check for power to relay at key on. If the relay has power ,check for power at pump.If you have power at pump,pump has failed. If you have power at relay but no power at pump,relay has failed. If you have no power to relay you may have an open circuit to relay. Report your findings.
     
  15. Cre8vtv

    Cre8vtv Member

    Joined:
    Jun 12, 2011
    I believe I found it. I unplugged and replugged in the fuel pump relay. It appears it had gotten wet during the rain and perhaps that created a bad connection. The car fired up perfectly on first turnover. Thanks again.
     

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