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By Missouri Mike - 12 Years Ago
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Hi Guys I'm having a performance Y block machined at this time but am lost as far as an oil pump. I read a number of threads on the subject and here's what I've gathered: The rotor type is not the hot setup but that is about (or is) all that's available new. The aluminum case rotor type is the better way to go but, is not manufactured anymore. That leaves finding a used one and rebuilding it. Right, wrong???????? I've seen Verne Schumann lists an iron cased rotor to rotor 2.14Gal/Min. Anyone have any experience with it??? Opinions???? Would really appreciate some input on the subject as this really has me at a loss as to which way to go .. Want to get this squared away as this motor will go in my 55 and that's what I want to take to Columbus next year. Thanks Mike
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By RB - 12 Years Ago
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The spur grear type may be all that is currently available new.. The gerotor style would be preferable, but both pumps will move plenty of oil for any Y Block that has normal bearing clearances.
Check this guy out. He blueprints pumps for better performance.. I have used his products and been well satisfied
precisionoilpumps.com
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By MoonShadow - 12 Years Ago
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I'm sure someone will jump in with more information but as it was explained to me the GearRotor pump evens out the flow of oil. The normal pump has a certain amount of pulsing. Both are good though. If you watch EBAY the aluminum pump shows up now and then. I was also just recently told that some GearRotor pumps are cast iron but I have no idea how to tell. Chuck
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By charliemccraney - 12 Years Ago
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You can get rebuild kits for the gerotor pump from Melling.
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By Talkwrench - 12 Years Ago
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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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By Grizzly - 12 Years Ago
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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
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By stuey - 12 Years Ago
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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
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By Ted - 12 Years Ago
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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.
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By MoonShadow - 12 Years Ago
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Cavitation? Yep thats the word I was looking for but pulsing was all I could come up with. Chuck 
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By Missouri Mike - 12 Years Ago
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Well guys, as always , thanks for the input and guidance. Mike
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By pegleg - 12 Years Ago
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Mike, It's actually pretty easy to tell an aluminum pump from an iron one. Aluminum is not magnetic, iron is.
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By MoonShadow - 12 Years Ago
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Darn Frank I wish you would have told me before. I thought I had a cache of aluminum blocks! Chuck
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By PF Arcand - 12 Years Ago
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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...
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By speedpro56 - 12 Years Ago
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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.
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