More thoughts on this subject. The pump drive, if off the cam, may cause
some minor timing changes if the drive is at one end and the distributor a
the other (chevy?). But I would be willing to bet that you cannot measure
the amount of twist in a cam caused bu the oil pump. I bet it is so small
that you couldn't measure the timing change.But I could be wrong (yeah, it
happened once!). The other thing is oil in the pan. There has been mentioned
that oil control is better with a dry sump. Well as fass as the oil from the
crank bearinggs and cam go it is exactly the same! The oil flows through the
motor in the same way and exits the bearing clearances in the same way. What
is different is the level of oil in the pan. In a wet sump, the oil is free
to slosh around in turns and stops and accelerations and thats one of the
good things about it. Keeps that slosh out of the crank and also away from
the front and rear pan seals. In LSR we don't have much turning and stopping
and hard launching like they do in other motor sports. A dry sump does let
the engine sit closer to the ground which is a benefit in my book. However,
when all is said and done, I don't se much difference between the wet and
dry sump for LSR. Oh, and top fuel and funny cars do not use dry sumps as
far as I remember (just scanned a few in Nat Dragster...didn't see any).
There may be a rather large benefit to heating the oil when it is in the dry
sump tank...but you can heat the oil in a wet sump also.
Just some thought on my part...back to your regular viewing....
mayf
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