oil pressure drop @ hard throttle

[posplayr]

Paco, after reading through all 5 pages of this, I HIGHLY recommend you drop the oil pan & make SURE your o ring in there isn't crushed beyond holding pressure. That's where I would start. Ray.

Yea, I get similar pressure numbers to saffa and hard for me to imagine losing pressure unless something is wrong; that O ring is the easiest thing to check.

works well too ...but as you say when cold it goes up and pins its self until warm. once warm it sits at about 6 or 7 under normal running about 1 or so at idle ...0.2 at idle in traffic....and 10 or so when doing illegal stuff

[paco13]

Thanx Ray,
Week end is coming so Maybe I'll get back on track with this.
Got side-tracked last weekend with the '82 I picked up, and now dealing with the weather is keeping me from the garage.

[jwhelan65]

I had this same thing happen last night on the 700. I gave it a gear under heavy acceleration and my light flashed for a brief second.

So after reading this entire thread I am a little confused here. Is this something to be concerned about? I checked my oil cold with the bike standing straight up this morning and it was a bit low..is that all it is?

[blowerbike]

Paco, after reading through all 5 pages of this, I HIGHLY recommend you drop the oil pan & make SURE your o ring in there isn't crushed beyond holding pressure. That's where I would start. Ray.

what ray said...
also,
to reverse your oil pump pickup you do not have to weld anything(you can but you don't have to)...
just a little clearance work and the pickup can get reversed..ive been doing it this way for years to drag race engines for myself and others.
bottom line is this street bike shouldn't need a reversed pickup.
is this bike fixed?
was it even broken?
whats the scoop?

[paco13]

I actually just got back to working on this earlier this week.
Things I did;
I installed mechanical gauge.

fixed leaking oiler with dowty seals.

replaced o-ring in sump.

filled oil to correct/recommended level.

As others said the oil pressure max's out when cold.
calms down after warm.
Took it for a ride and the pressure definitely drops when @ high RPM. pressure climbs with rpms to past max 15psi on gauge, then the light comes on and gauge bottoms simaltaniously. Chop the throttle pressure comes back in a sec or 2.

I haven't tried adding more oil yet. It will be storming all weekend so maybe next week I'll give it a shot and see what it does before ripping the pan off again.

[posplayr]

I actually just got back to working on this earlier this week.
Things I did;
I installed mechanical gauge.

fixed leaking oiler with dowty seals.

replaced o-ring in sump.

filled oil to correct/recommended level.

As others said the oil pressure max's out when cold.
calms down after warm.
Took it for a ride and the pressure definitely drops when @ high RPM. pressure climbs with rpms to past max 15psi on gauge, then the light comes on and gauge bottoms simaltaniously. Chop the throttle pressure comes back in a sec or 2.

I haven't tried adding more oil yet. It will be storming all weekend so maybe next week I'll give it a shot and see what it does before ripping the pan off again.

sounds like all the oil is being pumped from the sump and it is all in the head and trying to get back to the sump. The pickup gets exposed and there is a sudden drop in pressure when it sucks air.

I have not been able to run mine hard, but the one time I did rev to about 8-9K in 2nd the pressure just pegged. As you can image with the 1166 this is not a long period to get to red line in 2nd. What was unusual was when I back off the pressure stayed pegged.

I also have a 550 cooler with the top end oiler so that cooler restriction could keep the flow down so I dont run out of oil. Without the cooler and small lines, you are draining your sump.

Recall the coolers are after the pump but before the oil filter. The pressure gauge is then after this.

Recommendation: Add an oil cooler like either an 1150 or 550 oil cooler and don't use oversized lines.

[Kris V]

This is how us bad ass old school turbo dragracers make the oil light NOT flicker

[Kris V]

With a little adjustment and a milling machine...this is the stock oil pickup turned sideways and trimmed...along with the pan.

[blowerbike]

With a little adjustment and a milling machine...this is the stock oil pickup turned sideways and trimmed...along with the pan.

thats what i posted but without the picture tutorial..
ive been doing it that way for years.

[Kris V]

Me too it is hard to explain to someone who has never even thought of this without pictures. I do this for a job all day long on aircraft as a trainer

[posplayr]

Me too it is hard to explain to someone who has never even thought of this without pictures. I do this for a job all day long on aircraft as a trainer

Nice ............................

[chef1366]

I was explaining to Jim about that mod but the pics puts it all together. Thanks Kris!

[posplayr]

I was explaining to Jim about that mod but the pics puts it all together. Thanks Kris!

Yea I was too busy determining the G invariant flow rate derivatives

[paco13]

With any luck I'll have some time this weekend to work on my own sh*t.
Thanx all for your help, its much appreciated.
I'll update as I go.

[paco13]

Did the Mod