These additional numbers create more questions than they answer.

First I want to again thank Jay for sharing all of this data with us.

I stand my my earlier post that port matching may be the cause of most of the power differences between what the Dyno found and what we expected. I would not sell my dual planes based on this one set of tests.

And I retract my earlier comment asking that each run be optimized for the manifold. However an air-fuel ratio of 11.2 to 12 is rich. 12.5 is optimal for power with 13.5 fine for power. So something a bit lower for all manifolds would have been a bit better.

I agree that determining why the CJ had tighter exhaust gas temperatures would be nice to know. [Deleted errror.]

I think the second test Jay's planning will provide better data due to port matching, an engine without any mechanical problems and better headers.

Jay still did all of us a service and for a first set of tests I doubt that any of us could have provided as much food for thought.

Thanks again,

Bob

1966 7 Litre Convertible
1959 F-100 (under construction)
2005 GT40 (in my Dreams)