A Couple of "Tips" if your application is primarily Max or Near Max RPM modes of operation.
1) High Mixture Velocity thru the manifold will help with good distribution to the cylinders along with doing a better job of vaporizing the fuel in the air stream and will help retain the smaller particles of fuel in suspension in the Air/Fuel Mixture.
2) Below Near Max or Max rpm speeds some form of manifold heating is recommended.
The fuel needs to be vaporized by some method. Cutting of the Pontiac Intake Manifold at the water cross-over actually removes engine heat that would come from the engine coolant system. The same would apply with the blocked heat cross-over when used on a street driven vehicle.
One thought I have had was to add the common air purge lines at the back of the heads and run that low volume heated water thru the heat cross-over of the intake manifold AFTER the intake manifold openings (to the heads) were welded shut.
From there the water would exit the now heated WATER CROSS-OVER and travel to the Thermostat Water Cross-over before traveling to the radiator. The small volume of water (heat) would help vaporize the fuel (180 degree water temp) vs the normal 1350 degree exhaust gas heat that normally passes thru the manifold cross-over between the two heads.
Tom V.
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"Engineers do stuff for reasons" Tom Vaught
Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward.
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