Adam Riggsby Wrote:
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> Even with the right piston in there the exhaust
> timing will still be 193°. Also I think the
> treats reed piston has the ring gaps on the
> exhaust port side of things, which might become an
> issue once you port it out so crazily.
>
> This cylinder is basically a sprinter cylinder I
> feel. With all the fixings done to it, I bet it
> would have no problem pulling to 11k and spinning
> 12k with 18x40 gearing.
Damn, forgot about the ring gaps on that. I could relocate the pins or just go back to the spacer theory...
Even 18x45 spinning 11k would put me at 60 (theoretically)
Graham Motzing Wrote:
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> woah, 3.4 mm?!?! thats terrible, even those moby
> parmakits that come all crazy from the factory
> aren't even that bad.
>
> could you trim a little off the piston too?
Yeah, it sucks. Basically ALL the ports need to be 3.5mm shorter on the bottom. Then the port timing wouldn't be affected and it would flow better. Here's a picture of the piston at BDC looking through the exhaust port (you would see the same thing IF you could look through the transfers):
(edited)