> I am a backyard mechanic, rebuilding my first Spitfire. If anyone, more
>experienced than I, can say drilling a 5/32 hole completely thru the
center
>main journal and the front rod journal doesn't ruin a Spifire 1147
crankshaft,
>let me know. I have been wrong many times before.
> I think it will screw up the oiling and weaken the crank!
I know cross-drilling a crank to improve oil flow to the bearings is a
common racing modification for V8 engines although I haven't seen it
recommended anywhere for Spitfires. You'd generally run quite loose
bearing clearances and a high-volume oil pump with it. It effectively
gives you two oil feeds to each bearing instead of one.
Regards,
David Robertson
1961 Thunderbird
1978 Triumph 2500S
1974 Triumph Spitfire
<<< Life is too short to drive boring cars >>>
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