Chuck:

Keep in mind that shimming the spring will only increase the maximum oil pressure, will make no difference in the idle and low speed pressure.

John - "The Hoosier Hurricane"

I woould put a couple and try it. As I said, go slowly because too much pressure is not good either.

Thanks Mike. That is how I have it setup now. Chuck

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

In case you don't have the instructions here is the quote from MSD.

Vacuum Advance: The vacuum advance will advance the timing up to 10° during partial throttle driving (with 15 lbs of vacuum). The vacuum line should be routed to a ported vacuum outlet above the throttle plates.

 

And a link to them. Mike

http://www.msdignition.com/uploadedFiles/MSDIgnitioncom/Products/distributors/8383_instructions.pdf

1956 Fairlane Victoria (ORREO)

 

Overlooking Beautiful Rimrock AZ

Thanks for the response on shimming the spring. I think when I was young and new everthing a frined told me about stretching the spring. Washers make much more sense. How much do you think you shimmed it out?

For the MSD, the shop in question was working on a scrub cumerror. Wouldn't run at all well on ported vacume but cleaned right up on full. Thats what made me wonder. I'll dig out the paper work later and see what MSD says. Thanks! Chuck

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

There has been some debate on here about the ported versus full vacuum as well. The consensus seems to be to use ported vacuum in most cases. This is also what MSD calls for. I set my MSD up with ported vac. and it is working well. If yo use full vacuum be aware that you will end up with near full vacuum advance at idle. Mike

1956 Fairlane Victoria (ORREO)

 

Overlooking Beautiful Rimrock AZ

You can shim the spring with flat washers. Go slowly. I over did it once and blew the gasket out of the filter.

Finally back from the business trip. I changed the oil filter today and the oil pressure came up. It still seems a bit low but it is a stock pump. Starts cold at 40 idles hot at about 15. Also when I rev the engine the oil pressure goes up (wasn't happening before). So I guess the WIX filter had a bad relief valve in it.

Does anyone have the high pressure spring kit for the oil pump? Or is there a trick to changing the relief spring to increase pressure? It seems we used to stretch them but I can't remember the details.

Engine sounds very good and runs well. I have to get the final tune done on it and see what it will do. Question, does the MSD distributor operate on full vacume or ported? There was some discussion about it at the shop today. Chuck

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

Thanks for the input John. My pump is the all aluminum body not cast iron. Did they ever pinpoint a reason for the drop in pressure? Chuck 

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

Chuck, you say you had a new gerotor pump on the shelf. If the body is cast iron it is likely a Dynagear pump. I had lots of problems with those pumps. They had great oil pressure cold but it dropped off quickly as the oil heated up. They were made until 2005, more or less.

Dyna is no longer in business.

http://ford-y-block.com 

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