I am installing a remote filter to a 354 Hemi, the adaptor plate is tapped for 3/8 bsp. Would 3/8 tube be a big enough bore to carry the oil to and from the filter? Its not a race engine will only be street driven. There is no room to mount a filter to the block even with an adapter.
On my desoto (330) I run a 3/8" I'd hydraulic line. On my 354 I am running a 1/2" line. My thoughts were that I was a little worried about all of the mods that I made in the motor. Could you explain your build of the engine?
What's the size of the pickup tube on the oil pump? I'm betting it's 1/2", and I'd advise using at least that size... Unless the early hemi is an internal byp*** engine. Let me put it to you this way... Check out this thread: http://www.jalopyjournal.com/forum/showthread.php?t=297383 A small block chevy oil pump that's converted to a hand held utility pump. Spinning at 1000 RPM, it moves 4-5 gallons per minute. Now the oil pump is cam driven, so it only spins at 1/2 engine RPM, but all the same, at 2000 rpm, it's moving 4 gallons per minute. At 4000 rpm, it'sa moving 8 gallons per minute. Think about what it would take to push 8 gallons per minute thru a 3/8 line... All in all, I think a 3/8 line is just asking for trouble.
'-8' minimum. ...and the longer the lines the bigger the 'hole'...cold oil (and bearings) will not like the 3/8. .
I thought I would do some calculations on th pressure losses an velocity of oil through the different tubing sizes. (cammeron hydraulic data book) all calculations use 4 tpm as the base flow and 30 w oil @ 100 F For 3/8" tubing: Velocity of the 10.1 ft/s. Loss of psi in 100ft= 50.6 psi For 1/2" tubing : Velocity = 5.87 ft/s. Loss of psi per 100 ft = 13.8 psi For 5/8" tubing : velocity= 3.84 ft/s. Loss of psi per 100 ft = 1.66 psi with this data you can calculate your losses and determine if it might be a problem. My hoses are a total of 7'. So multiply the pressure loss by .07. In 3/8" tubing a loss of 3.5 psi ; 1/2" would yield .96 psi and with 5/8" = .112 psi. I know to much info, but it should show you that the numbers are very small .