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  1. Fingers

    Electric Hummer...

    Actually, it is a driver issue. The darn electric motors don't give any feedback on how much torque they are putting down. No Motor noise. So you don't really know you are spinning tire. I know this from driving my EV in poor traction situations. Now, after a little practice, I have learned to...
  2. Fingers

    LLY: Broken piston skirt

    Check the other pistons in the area highlighted in the picture. I suspect that is the true crack origin.
  3. Fingers

    LLY: Broken piston skirt

    Not enough pictures to be sure about anything. Obviously the crack had been growing for a while. The pisser cutout has an old dark crack that goes bright when it gave up the ghost. The oil ring too shows an old/new transition going from the ring into the oil gallery. In short, I think the...
  4. Fingers

    Happy Birthday Fingers!

    Thank you all for the birthday wishes!
  5. Fingers

    Allison 5sp: LML piston difference

    Arrow points to the front of the engine. Since the oil holes and squirter reliefs are ambidextrous, the offset will be in the correct direction in either bank so long as the arrow points forward.
  6. Fingers

    Allison 5sp: LML piston difference

    The offset is supposed to be relative to crank rotation. Is there any mark on the top of the pistons?
  7. Fingers

    Mahle Motorsport cast piston VS Fingers Oval

    Nothing. I adjust the design to match the CCs
  8. Fingers

    Mahle Motorsport cast piston VS Fingers Oval

    16.5 CR on 0.020" over should be 40.71cc chambers. The rest of the volume comes from the head.
  9. Fingers

    Mahle Motorsport cast piston VS Fingers Oval

    Oval Pistons are made to order. That is, any CC value you want, more or less.
  10. Fingers

    Mahle Motorsport cast piston VS Fingers Oval

    At the limits for single injector performance. Need two injectors. ;)
  11. Fingers

    Mahle Motorsport cast piston VS Fingers Oval

    Let me interject a little here. In no particular order. Oval pistons are not "perfect". None are. The "tight" portion of the bowl is actually the same width as a stock bowl. The lobes are bigger. As such, spray stays in the bowl just as much, if not better than stock. And there is less...
  12. Fingers

    LLY: Best Dual Pump Controller

    PM me and we will go from there.
  13. Fingers

    LMM: Rotating assembly ?

    No, there is a design flaw. Thus the Finger pistons.
  14. Fingers

    Twins with Twins, Anyone?

    Cap reduces the arcing in the relay when it opens.
  15. Fingers

    LML Belly buster for you smart lads

    The Bus is a daisy chain arrangement. Engine and TCM on one end and the BCM somewhere in the middle. I think the port is further out than the BCM. Bottom line is if there is a break in the chain, not data will cross the gap. Most frequently, it is an unplugged or loose connector on one of the...
  16. Fingers

    Twins with Twins, Anyone?

    No, the wrist pin will keep them steady side to side for the most part.
  17. Fingers

    Twins with Twins, Anyone?

    One of the biggest advantages to the cast is that they don't expand nearly as bad as the forged. And the skirts even less. So little, that you can keep very tight piston to wall clearances that will work in essentially all applications.
  18. Fingers

    Twins with Twins, Anyone?

    The marks are from the combination of larger PTW clearance and the additional head size from the coating. There will not be any long term issues from it, but would have liked to see closer bore size. I am fairly sure that the pitting of the coating is coming from impurities leaching out of the...
  19. Fingers

    Twins with Twins, Anyone?

    Pistons are rocking in the bores.
  20. Fingers

    Twins with Twins, Anyone?

    I have had no luck anodizing the cast pistons. The coating is splotchy and uneven.
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