Another thing to consider is the type of wet sump pump your using. a Ford
type (gear rotor I believe) is a more efficient and effective pump than the
Chevy style. There can be a cavitation problem with the Chevy style. Which
effects the oil flow and can hurt bearings. All the aftermarket pumps
(Titan) that I have seen use the Ford style pump. They seem to work just
fine. On the other hand we have run Mellings (Chevy) race pumps for years,
at Bonneville, with hand made custom oil pans, and the bearing look fine
after repeated 8,000 + rpm passes. So I don't know what the answer is?
John
----- Original Message -----
From: "DrMayf" <drmayf@teknett.com>
To: "LSR-List" <land-speed@autox.team.net>
Sent: Tuesday, January 28, 2003 11:31 AM
Subject: Danger , hit delete now stuff from mayf Re: Dry Sump stuff
> 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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