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High On Octane, p144
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September 23, 2014, 10:29:51 AM

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Author Topic: Ace/BW assisting Australian vintage racing team.  (Read 631 times)

High On Octane

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Re: Ace/BW assisting Australian vintage racing team.
« Reply #15 on: June 05, 2014, 12:23:27 AM »
Finally, the delivery of the Big Head was finalized today, and it was signed for at Mondello's.
So, I will check up on it tomorrow.

Also, the "fixings" kit for the Big Head from Hitchcock has already arrived without any issues with customs.


Ah man, let's not get started on customs.  I have an order in transit right now.......    :-\

Awesome that you finally got the head tho!    :D
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ace.cafe

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Re: Ace/BW assisting Australian vintage racing team.
« Reply #16 on: July 06, 2014, 03:29:35 PM »
Discussion with the owner today.

Due to some issues on his end, he was not able to take advantage of the BW piston construction run, so the decision was made to use the regular Hemi chamber, and a high compression piston to suit a methanol fuel. Some squish can be employed on the hemi piston, and I think he is going to secure a piston maker to do it, and we will provide a mold casting of the combustion chamber for the piston maker to design the crown. In any event, we won't be having to modify the combustion chamber, and it will remain a Hemi.

Valves will the stainless steel of a similar size to what BW is using in his head.

Port will be similar to BW's port size, but will be a little different because this head has a small port in it, so that gives us a little more flexibility in shaping this port. This port may end up being a little bit more "ideal" in shape, because of this.

Cams will be Hitchcock race cams, with .420" lift, so the lift height at the valve will be about the same as the BW head. But the duration and timing will be shorter. Probably, the maximum rpm range will be somewhat lower than BW's bike.

We will have more updates as some of these things get more firmed up. However, we can now get started on the head, since the main things which we needed to know are now decided.

 8)
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