the oil pump should be capable of delivering more than is required including losses with the surplus being returned to sump via Pressure Relief Valve


so just use variable speed elec motor to get required psi in circuit , will also be intersting how much flow at idle , AND if you could measure the current draw on the elec motor with cold oil and warm oil this could give a indication as to how much load in on the oil pump gear

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Buell Ulysses XB12X 06/08

See were your going barney .yes pump delivery cold n hot at around 1200 rpm would be nice info.if i use a hand drill that will turn at 1200 rpm i could slowly reduce the oil flow through the hand valve and see if or how badly the drill labours to turn the pump .sadly have a day job so some of this will take time .i have two engines one grumbly and two oil pump gears to assist fitting in the very near future .a good wank would be nice fromm time to time but too fucking tired to finnish these days .hey ho life goes on annnnd on annnnd on

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IF IT BLEEDS WE CAN KILL IT ,THIS STUFF WILL MAKE YOU A GODDAM SEXUAL TYRANASURUS ,YOUVE BEEN PUSHING TOO MANY PENCILS DILLON .GET TO THE CHOPPER

Sorry if I'm being a but I thought said there was no pressure relief valve in the circuit?

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aka DrBagiva, DrBusqvarna, Uncle Knobhead

having re read the description in the manual ref oil pressure
it may be me that's a
OIL PRESSURE
See Figure 3-115. The oil pump is non regulatory and delivers
its entire volume of oil under pressure to the oil filter
mount. When an engine is cold, the engine oil will be more
viscous (i.e., thicker).
When an engine is operated at high speeds, the volume of oil
circulated through the oiling system increases, resulting in
higher oil pressure. As engine speed is reduced, the volume
of oil pumped is also reduced, resulting in lower oil pressure.
To check oil pressure, use OIL PRESSURE GAUGE (Part No.
HD-96921-52B) and OIL PRESSURE GAUGE ADAPTER
(Part No. HD-96940-58). Remove oil pressure indicator
switch and insert pressure gauge fitting.
Ride motorcycle at least 20 miles (32 km) at or above
50 MPH (80 KM/H) until engine oil reaches normal operating
temperature. At 2500 RPM, oil pressure will vary from 10-
17 psi (69-117 kPa). At idle speed (950-1050 RPM), oil pressure
will vary from 7-12 psi (48-83 kPa).

most normal four stroke engine that I have worked on have a PRV fitted to limit pressure other wise as the rpm incresses so will the oil flow/ pressure to such an extent that it could blow seals ,gaskets,
http://youtu.be/tOiHdIXVWE8
http://youtu.be/7IpJlYssvkM

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Buell Ulysses XB12X 06/08

None of the pre 08 Buells have an oil pressure relief valve.

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Mithered ta death.
92 MB
96 S2T
98 S1W
00 M2
01 X1
03 P3
10 CR

If I'm a cabbage then Barney is a root veg

_________________
aka DrBagiva, DrBusqvarna, Uncle Knobhead

If Maz believes that lack of a PRV in the oil circuit is the cause of the worm drive failure then a) will post 08 bikes not suffer the same demise? and
b) could we manufacture an aftermarket PRV to be bolted into or onto the engine?

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aka DrBagiva, DrBusqvarna, Uncle Knobhead

08 and newer have a completely different oil pump design. No worm drive.

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08 Specialized Langster

Correct......08 bikes not only moved the pressure and scavenge rotors to drive directly off the cams but they introduced a relief valve.
Previous bikes rely heavily on the restriction drilling to the big end feed to supply sufficient operating pressure to the hydraulic lifters.......which is why I cant understand what Willy is trying to achieve
H-D will have investigated the restrictor size of the big end supply to death......if the drilling is opened up the big ends will get far more oil than they need, the sump/scavenge will be overwhelmed, resulting in the flywheels etc. 'dragging' in excess oil, swamping the bores etc. and the lifters/top end will be starved of their essential lube.

_________________
Mithered ta death.
92 MB
96 S2T
98 S1W
00 M2
01 X1
03 P3
10 CR

In my opinion, for what it's worth, a lot of people seriously under estimate how slowly these motors take getting up to operating temperature. I never spank a Buell until it's done at least 10-12 miles

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If your dreams don't scare you, they are not big enough.

_________________
Mithered ta death.
92 MB
96 S2T
98 S1W
00 M2
01 X1
03 P3
10 CR

So it would also follow that if you used anything other than the recommended oil this could also have an adverse effect on the performance of the lubrication system i.e. modern fully synthetic to the old heavy 20/50

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Buell Ulysses XB12X 06/08

I can always tell a bike fitted with synth oil as soon as it pulls up outside my shop ie. rattling top ends........the lifters dont like it

_________________
Mithered ta death.
92 MB
96 S2T
98 S1W
00 M2
01 X1
03 P3
10 CR

_________________
IF IT BLEEDS WE CAN KILL IT ,THIS STUFF WILL MAKE YOU A GODDAM SEXUAL TYRANASURUS ,YOUVE BEEN PUSHING TOO MANY PENCILS DILLON .GET TO THE CHOPPER

yes scavenge side is normally far greater then lube side

my concern would be " Previous bikes rely heavily on the restriction drilling to the big end feed to supply sufficient operating pressure to the hydraulic lifters..." and the rest of the top end or whatever’s last to get supplied with oil in the circuit

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Buell Ulysses XB12X 06/08