Help...2L engine backfire with flame and power loss

my 1960 hard copy agrees rover 56

Thats good, doesn't answer the question though, does it?
Terry

no it dosent ,im taking 55 to 65psi as the setting untill someone comes up with a 1955 on manual for the new engine. and 35 to 45 psi for siameese 2L engines 1954 and back with canister oil filter on releif valve side.
any one know what the 1600 engine was set at?

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Originally Posted by mfc

any one know what the 1600 engine was set at?

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55 to 65 psi @ 30 mph in top gear, according to the "48/'58 manual.

Be aware that the restricting bolt in the rocker shaft, will increase the pressure when you fit it,

Cheers Charlie

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Originally Posted by chazza

55 to 65 psi @ 30 mph in top gear, according to the "48/'58 manual.

Be aware that the restricting bolt in the rocker shaft, will increase the pressure when you fit it,

Cheers Charlie

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theoretically, it should increase the oil flow to the bottom end if it is low and that may increase the oil pressure if it is low.

but not increase the pressure if it is already good and if the relief valve is set correctly... 65psi should be the max i believe.

yea i realy have to wait for the head oil line metering plug to arrive before i can be shure of the setting i have at the moment {just under 60 psi} less oil into the inlet rockers should stop the oil being sucked into the inlet via valves, the top end is literaly being flooded, up near if not over the valve guides...i put the new o rings down to the smoke being acceptable at the moment.

That restrictor seems to be very important, because drainage down through the pushrod holes is a bit restricted.

I was reminded of this some years ago when I fitted a positive ventilation valve in place of the rocker cover vent, which caused an upflow of air through the pushrod holes.

First drive and I laid a smoke screen down the length of the main street, lost 2 litres of oil into the intake manifold.

Terry

Quote:

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Originally Posted by mfc

no it dosent ,im taking 55 to 65psi as the setting untill someone comes up with a 1955 on manual for the new engine. and 35 to 45 psi for siameese 2L engines 1954 and back with canister oil filter on releif valve side.
any one know what the 1600 engine was set at?

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You are right. 1600 same as Siamese 2000. 40lb at 30 mph.
From TP/138A March 1951 Page A18.
Keith

manual 4220 1958

A0-5

2 litre motor

55-65lb/sq.in @ 30mph


1954/55 workshop manual TP165A

A-10

supplement 1

1955 models @ 2000rpm 55-65lb/sq.in


1955 Publication no. TP/171/C Part No. 4041

Instruction Manual

Oil Presure 55 to 65 lb./sq.in @ 30mph in top gear with warm engine

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Originally Posted by incisor

theoretically, it should increase the oil flow to the bottom end if it is low and that may increase the oil pressure if it is low. Agreed

but not increase the pressure if it is already good and if the relief valve is set correctly Why not?

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Pressure can be defined as a resistance to flow. If the pressure is "already good" with no metering-plug, then it will be increased when the oil has to be pushed through a restrictive hole, if the relief-valve remains unchanged.

Whether the increase in pressure is measurable on the gauge, remains to be seen.