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Thread: 43mm pistonwash

  1. #1

    43mm pistonwash

    Before head removal compression 1-135/ 2-135/ 3-128... Squish paralell to wrist pin centerline .060 on all cylinders..
    Running the 43mm throttle bodies now for several hours with EFI controller on 7-11-11-5.5
    Piston crowns are normally tan from the thermal barrier coating on them.
    EGTs in the 1160-1180 range at WOT
    Spinning a 15-22 VX with 85 nozzle at 7160-7200.
    Maybe ill crank up the squeeze and lower the squish a little and make it a real race engine soon.
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  2. #2
    Moderator RX951's Avatar
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    Wink

    nice

    Thanks for sharing all your detailed results bruh !

  3. #3
    Flying Scotsman's Avatar
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    Sweet

  4. #4
    Bryan K's Avatar
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    Ross I put the 40mm sonic booms back on my ski and got my 50-60 rpm back and it's definately more responsive! I can finally tune the ski, so there may be more yet.

  5. #5

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    this did not take long to decide to finally do........

  6. #6
    RUNWME's Avatar
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    Looking good ! Squeeze it one time for me also

  7. #7
    Prism's Avatar
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    Is that with the stock fuel pressure? How can the fuel pressure be raised about 5psi? Any ideas? If that were done, it seems there would be no problem fueling an engine of this sort with the EFI controller, even on cool days with the squish jacked. Seems like your very near the limit, but still safe at the moment. How are the EGT probes working for you? What brand display are you using?

  8. #8
    Quote Originally Posted by Prism View Post
    Is that with the stock fuel pressure? How can the fuel pressure be raised about 5psi? Any ideas? If that were done, it seems there would be no problem fueling an engine of this sort with the EFI controller, even on cool days with the squish jacked. Seems like your very near the limit, but still safe at the moment. How are the EGT probes working for you? What brand display are you using?
    Yes still all stock fuel delivery system..
    Pump has stock internal regulator, for now....Adjustable regulator and larger pump are next..
    Stock Injectors are 60 lb, so fuel pressure is the next move...
    EGTs are Digatron... Still learning temps and what it should be for this location.. Looks like im pretty close now to correct temps.. 1160-1180 hottest on #3 at WOT..
    Will know more when i can deliver more fuel to it..EFI controller is at its limit-11.

  9. #9
    WATER WOODY's Avatar
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    Very good looking wash, Ross.

  10. #10
    WATER WOODY's Avatar
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    Your new name is....WASH-NEMO...

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