OST-020: Variables

[oldeskewltoy]

Bean Bandit Wrote:stock valve size untouched squish areas... so no major cc increase by your work and therfore less cutting needed.

variables...............

from another forum Wrote:Im going to have to say, it has something to do with doing 37cc chambers vs 36cc?

and you'd be absolutely right! If you remember back to OST-019 I mentioned I was going for a 36cc chamber after deshrouding... since stock is 36cc, and deshrouding adds volume, the only way to remove volume is by cutting the head back. In this head, I'm hoping to "open" the chambers out too 37cc... so with a minimal cut, the standard chamber changes a tiny amount, and so it is easier to get to 37cc without doing major chamber work like I did in OST-017 and OST-007.


Now on to the head work... yesterday I spent a large part of the day working the exhaust ports - I got three finished. The most obvious flaw found in those three ports.... besides the typical, was this casting mis-match.




Note the shadow line in the left hand panel. That was an area, that when cast, stuck out into the air stream, the panel on right is showing just raw shaping.

Yesterday was also a first for me... I met my client, and he got a chance to see/feel the work that I've done. Since I frequently assemble the head for the client, they don't usually get a chance to feel the short radius or to see/feel the changes in the exhaust ports. In fact my whole purpose to only doing 3 intake ports and 3 exhaust ports was so that my client could see, both with his eyes, and finger tips the changes as they occurred.




I took a liberty in making the 3 panel above.... besides the crappy mixing (roughness of overall photo) what liberty did I take???


more to come....