I'm worried about the dome and compression ratio.
If the rules allow it have you considered sleeving a 1300 block to 1147 so
you can use eight port heads? It's much easier than trying to locate an
1147cc eight port.
John Kipping
----- Original Message -----
From: "Joe Guinan" <joeg@neb.rr.com>
To: <fot@autox.team.net>
Sent: Thursday, April 14, 2005 8:47 AM
Subject: Piston Clearance and Oil Journal ?'s
> The next couple of what I'm sure will be MANY questions...
>
> For a Spitfire 1147 racing engine;
>
> First - "Jahns" brand forged (and domed) pistons - what piston to cylinder
> wall clearance should I run? The engine they came out of is bored for
.012
> inch of clearance. Another "spare" block would give me about .006 inch of
> room. I know 12 has to be too much space, but is 6 also too much or is it
> about right? I have spare stock blocks that I can use if necessary.
>
> Second - do you Spitfire guys drill out the oil journal that feeds #2 and
#3
> rod bearings? To what size?
>
> Joe Guinan
> Fremont, NE
>
>
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