Floor Vs Ceiling Porting Cylinder Head

Engine with excellent power and torque through out the entire operating range when i started working on a couple other sets it dawned on me that the intakes needed to have the floors raised and the roof of the port heightened to straighten the runners to the valve bowls.

Floor vs ceiling porting cylinder head.

In addition he expects to maintain mid 30s mileage while tooling down the highways and byways of this great nation. Oct 18 2010 6 69 runner admin wif a corner office deceased rip. Cylinder head porting part 1. Using a saw head cuttaway and clay i am designing the amount of material needed to close up the port and raise the roof of the exhaust port to gain major.

516 s have a flat intake port floor and the 915 s have a nice radius that i believe helps the mixture make a nice laminar flow transition as it makes the bend to the valve pocket. Cylinder head porting has been an over used term for the last 20 years and despite all the words written about this process you can t go more than 10 minutes with any group of hot rodders before someone uses the term port and polished which merely reveals their ignorance on the subject. The objective of porting a cylinder head is to improve engine performance via constructive enhancements to the intake and exhaust flow paths. Cylinder heads as manufactured are usually suboptimal for racing applications due to being designed for maximum durability ports can be modified for maximum power minimum fuel consumption or a combination of the two and the power delivery.

Allpar s own bob o neill is assembling a 2 2 turbo engine for his 86 daytona c s with the goal of hitting over 200 hp at no more than 12 psi of boost. Here is an area where there is a tremendous amount of potential for success and also failure. If you have a more agressive porting plan then you would need to perform the same process for the transfer port ceiling height as you did with the exhause port but using the new transfer numbers. Cylinder head porting refers to the process of modifying the intake and exhaust ports of an internal combustion engine to improve their air flow.

Transfer port the transfers are good at their original event duration so there is no need to mark those. The combination of a raised floor and expanded walls helps to get the job of filling a cylinder done when the port and valve is feeding a hemi style chamber or is one of a pair of intake valves in.