(Catching up) OST-080 (and OST-074):Dan Dabbles in Dubs

[oldeskewltoy]

I have a friend with a few Porsche 924s.....

OST-074: 3 down........ I found in both Porsche heads the bowls to already be too large for making substantial improvements - short radius work and simple seat/bowl clean-up



The big thing with both of these heads - guide wear





OST-080: With this head the client went big valves... and the new seats broke the head



A replacement was found - $$

Even with the bigger valves - there still wasn't a lot of material removed do to the oversize bowl/seat diameter.

A finished chamber showing the big valves, and the multi-angle valve job.




On the exhaust side there was some room in the port walls....





On this one the client converted from factory EFI, to something a bit less fuel efficient.....