High volume oil pump at what clearances?
#1
High volume oil pump at what clearances?
I checked the clearances on my 355 and the mains are .0025 and the rods are .0027. The guy at the machine shop told me today to run 20w-50 with a hv oil pump. Is the HV oil pump necessary with the clearances i have? I have the stock pan and i have heard of horror stories with the HV pump. so it would be real nice if it wasnt necessary to get the high volume pump and a larger pan
#2
Thicker oil and an HV pump sound like a recipie for a stripped pump drive gear. You already know not to run a stock pan with the HV pump. i don't think your clearances are that far out, but I also do not build engines for a living. Maybe some people more qualified will reply.
#3
stock pump if you stay with the stock pan, if you have to have a HV pump then get a larger pan and I would not go any thicker than 10W30, like shoebox said "it's a recipe for disaster" - but that's just my opinion - do a search on high volume oil pump and you will find a plethora of information
#5
Stock pump.... with some "blueprinting", may be the best solution:
http://www.gofastnews.com/board/tech...ower-mods.html
http://www.gofastnews.com/board/tech...ower-mods.html
#10
Mellings M55 (circa 2001) 5/8 tube, stock pan, 5W-40 with Orange Canton spring. 80 psi cold (Hawaii Cold, 80 degrees) 40-50 psi at idle warm. This is a engine with very similar clearances.
Changing spring to Mellings Yellow. See what happens next week.
Changing spring to Mellings Yellow. See what happens next week.
#13
One of the Impala guys just had the drive strip, he was using a melling 10552, this is listed as being slightly higher voume than stock, but I am sure that is not compared to a stock LT1 pump, so I am not sure if we should call it "HV" or not.
#14
Rich