In the course of building up my M-type engine using a Laystall crank it has become apparent that the throw is about 3 ml shorter than a normal crankshaft. This Laystall crank was apparently used in a supercharged J2 long ago (so long ago that the supercharger is sectioned and on display somewhere in Wales). I imagine there was a good reason for reducing the throw.
Presumably a standard compression ratio can be restored by skimming the head but how far is it possible to go with this ? Has anyone experienced this problem ? Is there a practical alternative solution ?
Email me direct as I can assist on the pistons with a higher crown. Recently had a similar request to have some pistons machined up for a VSCC trials Morris Minor and he wanted the compression ratio at 9.1 to 1!!!! Goes well enough!
Drop me an email sam as I can have whatever crown height and profile you wish.
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Posted - 04/07/2007 : 19:23:55
