Full flow oil system/kits

OLD AS I

OLD AS I

Senior Member
thinking of installing a system, any pros or cons about them, any suppliers of kits, have found 1 at Flat head speed and machine, any one used their kit ?
 
It depends on the system, there are two. #1, is the original Ford system that is refered to as the 95%. And an aftermarket system refered to as the 100% system. The first system only costs a few bucks and is pretty simple, the other is rather complicated and expensive. Both accomplish the same thing.
 
oldasi said:
thinking of installing a system, any pros or cons about them, any suppliers of kits, have found 1 at Flat head speed and machine, any one used their kit ?
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If you are interested in the 95 approach I have several good references. I have never used any of the 100 style, so no idea which is the best there.
 
There are pros and cons with either the "95%" or "full flow" filtration.

The normal "95%" system, like some Ford Canada/military engines used in the '40s and commonly sold by Reds Headers, requires drilling/machining of the rear of the block, but uses the stock oil pump and pan, so cost is very low. (An additional 1/4" line can be installed behind the flywheel that requires two more holes drilled, but this results in true 100% full flow filtration). Pro-very inexpensive. Con-requires complete engine disassembly.

The MCF full flow system filters 100% of the oil out of the pump and requires no block modifications or machining, only one hole drilled in the side of the pan. The cost is much higher because of the specially modified pump, outlet hose and fittings. Pro-could be installed in vehicle if pan removal is possible. Con-more expensive.
They both are very good systems, and much better than the stock partial flow filtration, imo. :)
 
Andy said:
I installed a "full flow" . I don't think any are full flow as the rear cam bearing is lubed by leakage from the oil pump. You must tear down the engine to machine the passageway for the plug. I don't think the full flow is very pretty or goes with the engine. It does work like a modern engine filter so I guess it is best.
The bypass filter is the way to go if you have a running engine.
PS, SBC's don't filter the rear cam bearing either.
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Don't know where you got the info on a small block but all the oil leaving the pump goes through the filter there is no other passage at all.All the bearings have oil passages.The only time there is no filtration is when the filter is in bypass nothing else.

R
 
Andy said:
I installed a "full flow" . I don't think any are full flow as the rear cam bearing is lubed by leakage from the oil pump. You must tear down the engine to machine the passageway for the plug. I don't think the full flow is very pretty or goes with the engine. It does work like a modern engine filter so I guess it is best.
The bypass filter is the way to go if you have a running engine.
PS, SBC's don't filter the rear cam bearing either.
Click to expand...

Little bit of confusion here Andy, what you are referring to is call by most people a 95% system because of the rear main issue. The 100% system is just that 100% and normally involves a modified oil pump. No idea what the "pretty" comment refers to, it is going to depend on how you install it. They can be easily hidden from view! I install the 95% system so it is fairly difficult to tell it is there. To me the biggest draw back to the by-pass system is the appearance and the space it takes up on the engine. But, it is a good filter syste.
 
Ol Rons book has a great section on modifying to the 95% filtration. Even shows how to make the special tool for drilling the block.
I used brass barbed fittings and drilled them out to the same diameter as the oil passage. My filter is a modern one hidden in a Hildebrant style filer canister.
 
I think bren gun carriers had full flow oil pumps in them ( if it wasn't Bren gun carriers there is another military vehicle which had a full flow pump in it) it was the only full flow oil pump iirc. They are available if you look for them but normally people take them out and use a std pump and use the 95% system.
 
This is my home made setup,the second generation I made,this has the filter lower and in the cool air,so far works great,uses a stock ford filter.
Lawrie
 

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I am using the old MCF full flow system. It did require drilling a hole in the side of the pan which does cause a bit of "fishing" when put the pan back on. Overall I have had no problems with the system. The kit came with a modified melling pump and all the plumbing. I located the filter inside the side rail under the drivers door on my truck for easy access. Using Hastings LF-115 full flow spin on filters.
Similar kit about $350 at http://flatheadspeedandmachine.com/full-flow-oil-conversion-kits.html
 
Thanks for all the replies and comments, have been trying to find Flathead Speed and Machine, they have a web site, no phone number or address, have an email address but they are not replying, wanting to know the cost of their deluxe kit, are they still in business ? anyone ever heard of them ?anyone know a phone number, Google search brings up their web site only
 
FS&M website (see post 18) lists prices, advises they are sold out, lets you contact them only by e-mail without giving a location or phone number. Guess you just arrange the cash exchange by e-mail and then set up a time (after midnight)and day when you can meet up with them behind the Circle-K. Kinda hinky huh!
 
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