Stanley, I was told that the probe should be 4" from the exhaust port, so you may be running VERY hot, but your CHT does not reflect that. 6.9 to 1 is fairly low compression, so that seems very odd to me. Get one of those fuel/air ratio gauges and check the actual mixture. What is an 1821 carb?
Yes, the shorter the intake, the better, and I do believe that a single pipe would give you better flow. In fact, I have heard that a single port head is better than the dual port. So, I don't really know why we always end up with the dual port unless they just don't make the single port any more. Put the carb on top, like it is in the car and it will run better. Good luck doing that. See N64KR at http://KRBuilder.org - Then click on the pics See you in Mt. Vernon - 2006 - KR Gathering There is a time for building and a time for FLYING and the time for building is OVER. Daniel R. Heath - Lexington, SC
