55 Fargo Posted February 28, 2008 Report Posted February 28, 2008 Hi all, I have a full flow oil filter on one of my spare engines, which is a 251 Chrysler engine. I have a 218 Canadian Long Block, which is the same block as the 251 and 265, just different bore and stroke. I am thinking of cleaning up the full flow filter and installing it on my current engine with the partial flow filter. Will this work? Quote
Don Coatney Posted February 28, 2008 Report Posted February 28, 2008 In order for the full flow filter to work you must install the plug as pictured below. This is only for a long block Crashler, Desoto, or Caniadian engine that has the diamond shaped boss to the right of the distributor. Quote
55 Fargo Posted February 28, 2008 Author Report Posted February 28, 2008 Thanx For the reply and pics Don, it may be a bit of work to change, but would be worth it, even if I did not do it now, it can be done when I rebuild the 251 Engine I have.............Fred Quote
Suddensix Posted February 28, 2008 Report Posted February 28, 2008 So is there no way to convert the short engine to full flow if you use a remote filter??? Quote
Guest rockabillybassman Posted February 28, 2008 Report Posted February 28, 2008 Yes there is, but you need a high volume oil pump and some pumbing changes. Quote
martybose Posted February 28, 2008 Report Posted February 28, 2008 Yes there is, but you need a high volume oil pump and some pumbing changes. Plumbing changes yes, high volume pump, no. I've converted mine to an external full flow oil filter with an external oil pressure regulator, and was surprised when I got over 100 lbs. of pressure cold with the stock oil pump the first time I fired it up! I turned down the regulator so that it is now 70 lbs. cold with 10-40 oil. With the stock in-block regulator, maybe some fine tuning of the spring tension or preload will give you any pressure you want. Marty Quote
55 Fargo Posted February 28, 2008 Author Report Posted February 28, 2008 Don On my 218 Long Block, it does not have the diamond shaped boss, just the oil lines coming out of the block. On my 251 it looks different that what your pic looks like, but the oil filter looks like your but it is not mounted to the block like yours is.....Fred Quote
Suddensix Posted February 28, 2008 Report Posted February 28, 2008 Plumbing changes yes, high volume pump, no. I've converted mine to an external full flow oil filter with an external oil pressure regulator, and was surprised when I got over 100 lbs. of pressure cold with the stock oil pump the first time I fired it up! I turned down the regulator so that it is now 70 lbs. cold with 10-40 oil.With the stock in-block regulator, maybe some fine tuning of the spring tension or preload will give you any pressure you want. Marty Marty, could you elaborate on the plumbing changes? Are they like Don's diagram and if so what do you use to block the oil passage? Quote
martybose Posted February 29, 2008 Report Posted February 29, 2008 Marty, could you elaborate on the plumbing changes? Are they like Don's diagram and if so what do you use to block the oil passage? The 23" block doesn't have anything like Don's 25" block. My setup is a rather elaborate affair that uses a modified fluid drive oil pump. It eliminates the crossover pipe in the pan, and goes from the OEM external pump directly to a filter, then a pressure regulator with a drain back into the pan, and returns into the block when the OEM in-block regulator usually resides. There's more to it, but you get the idea. After mine was working, one of the other folks (wish I could remember who to give proper credit!) came up with a much simpler way to add an external full flow filter. It does require some minor machine work on the oil pump mount on the block. What he did was figure out which of the two passages in the oil pump mount goes to the crossover pipe (the other comes from the pickup). He then got a welsh plug that was slightly larger than the cast bore of that passage. He figured out where in that passage he could drill and tap a pair of holes from the top of the oil pump mount to feed to and from an external oil filter. Then he drilled the passageway just far enough past the first hole that he could drive in the plug so that it bottoms out in a location that doesn't interfere with either of the drilled and tapped holes. The oil flow is then out of the discharge port of the pump, into the passage where it is diverted by the plug into the hose leading to the external oil filter, then back into the return hose that goes back into the passage beyond the plug, and on into the engine as normal. A clever solution; wish I'd thought of it! Marty Quote
Guest rockabillybassman Posted February 29, 2008 Report Posted February 29, 2008 I stand corrected. Quote
Suddensix Posted February 29, 2008 Report Posted February 29, 2008 Thanks Marty, I have my engine out of the car at the moment for an overhaul so I will take a close look at switching it to a full flow. Quote
Plymouthy Adams Posted February 29, 2008 Report Posted February 29, 2008 Richie Hodge sent these two pictures for me to post in his behalf on the full flow oil filter system..so here they are... Quote
grey beard Posted February 29, 2008 Report Posted February 29, 2008 Marty, The guy who did that nifty full-flow trick was Ritchie. Don't know his last name. If y'all are interested, I have the pics of his conversion, and it is really slick. He used 3/8-inch steel line both out of and back to the pump boss on the engine block. This arrangement allowed him to use the stock oil delivery circuit inside the block, including the pressure regulator. When I queried him on the small diameter steel lines he said he had miles on the engine with this setup and all was still happy. I have the remote base that uses a spin-on filter, and attempted to duplicate his setup, but was not able to do the block drilling in the chassis without removing the engine. A 5/8-inch bit is used, and those are pretty long, till you get a drill on one end. He just drilled into the engine supply port of the oil pump on the block side - that's the port closest to the fuel pump - and then tapped the 5/8-inch welch plug into the port till it hit the end of his oversized drilled passage. He then drilled and tapped a hole on top of the boss on each side of his plug, for oil out and oil in for his filter connection. Pretty clean installation. Marty - I have tired my very best to find an oil pump like you used with the external pressure regulator, with no success. Do any of you know the application for this oil pump with an external regulator? Was it a transmission that shared engine oil? Sure would like to find one. Quote
Don Coatney Posted February 29, 2008 Report Posted February 29, 2008 Don On my 218 Long Block, it does not have the diamond shaped boss, just the oil lines coming out of the block.On my 251 it looks different that what your pic looks like, but the oil filter looks like your but it is not mounted to the block like yours is.....Fred Fred; Not all long blocks have provisions for full flow filters. If your engine does not have the diamond shaped boss I suspect your engine is one that does not have provisions. Quote
martybose Posted March 1, 2008 Report Posted March 1, 2008 (snip)Marty - I have tired my very best to find an oil pump like you used with the external pressure regulator, with no success. Do any of you know the application for this oil pump with an external regulator? Was it a transmission that shared engine oil? Sure would like to find one. The only reference I had was a photo that referenced a FluidDrive transmission. I called Moore Salvage and told him that I wanted an oil pump off of a FluidDrive engine, one with the pump-mounted pressure regulator, and he sent me one! (This was maybe 7 or 8 years ago). Marty Quote
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