Super 90 sump plate

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Mike Kearns
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Super 90 sump plate

#1 Post by Mike Kearns »

I’m having my Super 90 engine rebuilt.Should I have my engine builder install a Precision Matters billet plate sump (I have and was planning to use on Super engine) or stay with the original Super 90 sump plate. I like the drain plug but don’t want screw things up!!
Thanks Mike
Mike Kearns
1961 Super 90 Coupe
2004 911 TT

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Don Gale
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Re: Super 90 sump plate

#2 Post by Don Gale »

You're referring to the one with the check valve that keeps the pickup tube from sucking air under hard cornering? I would say since it was discontinued in later models that it was deemed unnecessary. The Precision Matters sump plate will provide slightly more depth and oil to help in that respect. It will also drain ALL the oil that would otherwise get left behind from draining only from the case plug if not removing the sump plate each time. Ron's billet plate also eliminates drips from the copper rivet that fastens the stock magnet. Your call, but I'm using Ron's plate on my 912 build.
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Wes Bender
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Re: Super 90 sump plate

#3 Post by Wes Bender »

It's a no-brainer. Go with the PM aluminum one. As Don points out, it will drain all of the oil when the plug is pulled and will eliminate the tendency of these plates to warp when slightly over-torqued.

Same thing with Vic's valve cover gaskets. They don't leak. I think Stoddard carries them too.
Some days it's just not worth chewing through the restraints.....

Mike Kearns
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Re: Super 90 sump plate

#4 Post by Mike Kearns »

Don - yes that’s the one I have. Looking forward to using the billet one with the drain plug, saving time and hopefully eliminating a lot of oil drips and spills.
Thanks
Mike Kearns
1961 Super 90 Coupe
2004 911 TT

Tim Berardelli
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Re: Super 90 sump plate

#5 Post by Tim Berardelli »

A Factory Technical Bulletin issued in 1963 indicated that those sumps were no longer installed on S90 engines due to oiling issues and instructed dealers to remove any they encountered during maintenance or engine overhales and replace with the sump plates and screens installed on normal and super engines.

Mike Kearns
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Re: Super 90 sump plate

#6 Post by Mike Kearns »

Thanks Tim Don and Wes for your input!
Mike Kearns
1961 Super 90 Coupe
2004 911 TT

Alan Klingen 2
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Re: Super 90 sump plate

#7 Post by Alan Klingen 2 »

The sliding vavle does work I know!!!My boss took his out and then blew up the motor on the carosel turn at sonoma raceway or Sears Point. You should also baffle the sump for safety reasons. Alan The Stable.

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Mathieu Lecomte
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Re: Super 90 sump plate

#8 Post by Mathieu Lecomte »

I support the use of the Pre-Mat sump from Ron LaDow, I have one on my 912 and very happy with it, and it will not warp like the original steel versions..

Alan Klingen 2
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Re: Super 90 sump plate

#9 Post by Alan Klingen 2 »

Go with the PM plate alone. Alan The Stable.

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Al Zim
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Re: Super 90 sump plate

#10 Post by Al Zim »

The steel sump plate warps because too much torque is used to install it. You should use 7 foot pounds of torque on the steel nuts Go around the sump at least 3 times to stabilize the torque. Do not lower your car. if the car bottoms with a device that will crack you get an oh SHIT situation when the light comes on. al zim
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