cwtoyota, on 04 April 2012 - 08:33 PM, said:
Yeah, that's plating for sure. His web page says plating and that's what he delivered. Considering he did all that work and had to send my cylinder out for re-plating, his turnaround time was awesome. (Yes, I am 100% sure that is my jug and head).
You can see the remnants of the grooves, and that the studs are sticking up higher above the surface than stock. Clearly he is machining the cylinder deck down just enough to make it flat. That's only about 3mm. I'm sure he is using a piston with a shorter "pin-height" to compensate for the deck height change. That's probably saving a little piston weight to compensate for the increased diameter. Seems to me, that's how his pistons can "weight the same as the stock piston".
I noticed that dual squish angle too. That's the race-gas head, so I don't know what the pump gas head looks like, but it would be interesting to see how they compare, and if these are different for my mid/top porting vs the broad/smooth porting.
I have the pump gas head, Mid-top, dual squish angle also.