The gear type pumps work great with high performance Ys as well. I've run them for years with 400+HP with no problems at all. That's what I'm running now in my 500 hp 56 tbird with an added pressure adjustment.

-Gary Burnette-

Mike your opening question is confusing, as you refer to rotor & rotor to rotor & aluminum etc. The two main pumps are Gerotor style & Gear (or Gear to gear) style. Ted refers to it as Spur Gear type. He explains why he prefers the Gerotor style. In any case, unless you are building a substantialy modified engine to be run at high rev's, it's not likely that you need a high capacity or special pump. Bottom end oiling in Y-Blocks is not a usual problem area... And just a side note on this subject; Y-Blocks are the original Ford side oilers, even though we only hear references to the 1960s 427 side oilers...

Paul

Darn Frank I wish you would have told me before. I thought I had a cache of aluminum blocks! 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

Mike, It's actually pretty easy to tell an aluminum pump from an iron one. Aluminum is not magnetic, iron is.

Frank/Rebop

Bristol, In ( by Elkhart) 

Well guys, as always , thanks for the input and guidance.

Mike

I'd rather be lucky than good.................

    but good ain't bad!!

Cavitation? Yep thats the word I was looking for but pulsing was all I could come up with. 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

That Y-Block Magazine article on building a high volume gerotor stryle oil pump for the Y is in issue #84 (Fan-Feb 2008).

 

The main problem I find with the spur gear pumps is a cavitation issue that starts showing up after 5200 engine rpms.  And this is a problem with this style of pump that shows up regardless of engine make.  While this is not a show stopper in a high performance application, it does take away some horsepower by way of oil pump drag and harmonics being transmitted to the ignition.

 

While the spur gear pump design was introduced on the original Y's, Ford engineering did come up with the more superior gerotor design in 1956 and started phasing those pumps into production.  By the end of 1957, the gerotor style of pump was the standard oem pump for the Y engines and for that matter, all subsequent Ford engine families after that.

Lorena, Texas (South of Waco)

Talkwrench

i seem to remember an article in Y-BLOCK MAGAZINE where someone machined an extension for a gerotor pump and used the rotors from another ford pump  351?? looked quite straight foreward. ended up with a high volume pump

stu

The gerotor oil pumps are easy to spot they have a perfertly flat plate that covers the gears. It's hard to spot the Alloy casting through 50 years of oil and crud. I got one of ebay so they are around.

cheers

Warren  

Grizzly (Aussie Mainline)

Not to hijack this thread but I have just tried another oil pump on mine both the spur gear type,  not the O ring type. I can get good oil pressure with second one I tried as it goes to over 60 psi on startup, BUT same as the previous pump when the oil gets up to temp the pressure drops away, cruising will be about 28 psi and at idle will be lucky to be 10 psi. And this is will 40-70 wt oil. I take it that this means that the bearings are worn, even with a new pump wont help? Anything else I can try ..And dont say rebuild..



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