Panic,
Sorry I got busy at work for a couple days.
What happend to that long post?
No I'm not looking to be coddled or for positive encouragement from the masses. I am however looking for cold hard facts and measurements. The task I have laid out for myself is not easy but is most definately feasible. Designing a cylinderhead and bed plate for an exesting engine block is not some crazy impossible task. It just takes time and effort. CAD programs have made it much easier, but are not absolutely required. How do you think every internal combustion engine was designed prior to the computer age? Yes car companies utilize a team of engineers to design a single bolt, so to the average person it seems impossible. Don't be afraid of a challenge panic!
Yes I know others have done it in the past, and there are a very small number of 12 port heads out there for a small fortune.
As far as I know, the wayne is for 15 bolt pre 1953 engines, its cast iron, uses the stock shaft style rockers (all exhaust no intake arms), and has an open chamber design. It was impressive for its time but not compared to modern cylinderheads.
The sissel heads I believe are only for gen 3 gm inline 6's 194, 230, 250, 292.
The only others I am aware of are frankenstein sbc heads or the toyota version that I believe requires modifing the block for a different bolt pattern.
Why has no one made a modern head for a straight six engine first introduced in 1929 and phased out for an updated and incompatible design which then ran until the 1990's? Does the introduction of the small block v8 in 1955 ring any bells?? The masses embraced the v8 and most (not all) forgot about the poor inliners. All aftermarket and gm support went to the v8, and v6.
My plan for the head.
Aluminum
Modern wedge combustion chamber with a cross flow design
Stud mounted rockers (possibly roller)
Probobly larger valves, the stock 1.50 E & 1.88 I are ok but not "huge for this displacement"
Hollow tube pushrods for oiling the rockers
The measurements I asked for are the foundation of the design. Match the bolt holes, coolant holes, push rod holes, and cylinders and all the rest is designed around that.
