The 1608 comes out, the 1397 goes in....




Repainted the 20 year old Pacesetter header.




Here's how far along I was this morning.




In the past I've never liked the non crossflow type cylinder head arrangement on these engines because the exhaust heats up the intake manifold and costs power. But for fuel efficiency, it's perfect.

Got it running today and road tested it. It runs quite well and is very quiet and smooth. I still have few bugs to work out. It is still a bit too lean with an air/fuel ratio of about 16.4 to 1 while cruising. I'll have to go into the carb and richen it a bit. What A/F ratio would you guys be aiming for, for the best low speed part throttle economy?

Also I found that the 31 year old vacuum advance diaphram does not function. Vacuum advance is definately something you want to have working properly if you're interested in getting good fuel mileage.

I'm pretty happy so far though. The event is Sunday.