A good project, usefull to many members in USA, Europe & UK.
This subject has raised it's head many times over the years.
please refer to:-
"AC Exchange" Fall 1996 vol 15.
New Products Bristol Oil Filter Adaptors:
Vokes Oil filter elements have always been expensive even though we (a supplier in England and I (Ron Leonard)) have combined our orders tomake them as large as possible.
Each time we are faced with price increase, this time we are not to reorder.
There will soon be an Adaptor that will fit on the underside of the Vokes Filter Head to accept a common Spin on Filter. The advantages are numerous:
Oil cooler can still be utalized.
Looks original (remains in vertical position).
Minutes to convert with no modifications. cheap spin on filters.
Plus all important... The oil flows through in the correct direction.
AC Exchange Summer 1997 Ron Leonard.
Bristol Oil Filter Adaptor.
This is the FIRST Adaptor designed to run the Oil through a Spin on Filter in the RIGHT direction.
The original VOKES elements were designed specifically for Bristol's ODD oil flow design. The oil flows from the Center of the filter to the outside in the Vokes unit,
utalizing a much smaller filtering surface than other automotive applications.
The others flow inwards from outside, taking advantage of much more surface.
Please refer to
Oil Flow chart in Owners Manual..[
]
Adaptors used up to now (1997) were simple to machine compared to these. However they don't invert the flow of oil to match the Design of the Spin on Filters used.
Well known restorer
Mike Dapudja decided to do something about this problem while he was rebuilding a Bristol engine.
The Adaptor comes with instructions and a
Fram HP-1 filter which has a maximun recommended working pressure of 200PSI and abusrt pressure of 500PSI.
It can be installed in about the same time as a normal oil filter change and the cooling fittings are not affected....
For those in England and Europe adaptors will be available soon Summer 1997...... via Brian Eacott. [
].
I have run BEX333 with one of these adaptors for at least 48/49,000 miles without any problem. (Fitted by previous owner- Lee Kolb in 1997)
Visually looking into the engine bay every thing looks standard bar the glimpse of the orange oil filter alongside the battery.
I will take a picture and try to get it posted.
The Standard Oil Cooler take off works as Bristol designed, As the oil temperature rises the Vokes built in spring release / valve diverts oil through the oil cooler.
Again please refer to the picture in the Workshop manual...( I will try to post picture, If only it was straight forward)
Not sure if these Adaptors are still available or if Ron Leonard could get a new Batch made.[?] maybe someone in USA can discuss with Ron Leonard before he retires.
(Ron lives in Durango, CO81301)
Fram HP-1 oil Filter approx £7.50 each or the shorter by 1.5 inch MOP P4452890 Filter @£8.00 each plus vat.
Max flow rate .. 10 gpm ..[
]
Just an idea, Open to discussion.. ...However for those who must retain originality, a batch of original design elements must be commissioned.
Have Bristol Owners Club commissioned same or are they prepared to contribute[?][?]
Keith ..[
]