OST-042-01: The Dubai Deception

[oldeskewltoy]

So the head is back in my hands, the delay caused by the 2016 SCCA runoffs, and the shop closing that week to support their clients @ the runoffs.


This head is uncut @ 4.566"





and once the valves are lapped into their new seats, chamber volumes can be assessed




3 @ 36cc, and 1 @ 35.9........




1/10 of a cc is pretty close, but because this is an OS valve head, some additional de-shrouding is necessary. De-shrouding is a bit different on an OS valve head then it is on a std valve head. To better utilize the larger valves, a bit more room is needed around the valves....



Using Nissan SR20 valves to protect the new OS 4AG seats, you can see on the right the bit of extra work performed. If you are sharp of eye, you can see the scribe marks to mark out the exact placement of the gasket so I know just how far I can work the corners.....




more to come.........