(25-09-2011, 04:51 AM)Malcolm Wrote: Can''t see it being a starter where testing of the modern day in line OHC or OHV engines most commonly used in motorcycles are concerned.

In an OHC engine, the cam drive (chain/gearing) would have to be removed/disconnected in order to eliminate operation of the valves, plus the spark plugs from each cylinder also being removed.

In an OHV engine, the push rods, rocker shaft and rockers would have to be removed in order to eliminate valve operation, and again, all spark plugs would have to be removed.

It's not a big step from either of the above, to actually lifting the cylinder head(s) in order to view and measure the cylinder(s).


It's most likely much better suited to the big block V8's used in drag racing for example (as you state), where these are kitted out with nitrous, turbo's, blowers etc and all of the associated plumbing.

My two penn'orth .........

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Of course, your right.

I got stuck in the train of thought about tools for measuring engine capacity.

Sure when the two strokes make a comeback we can explore this more in depth...