zeroptzero

Thanks for the reply, yeah I think I baby the car too much in daily driving, I should try to drive it a bit harder. I tend to drive like an old lady at times. I think I'm going to go ahead and swap the oil jet bolts, I also have found a baffled oil pan that I might throw on at the same time while I'm in there.

RedY2KS2k

You do understand that updated oil jet bolts would make your car MORE susceptible to bearing/crank damage, not less, if there were an incident where the oil momentarily sloshed away from the pickup.

s2000ellier

Forgive my ignorance, but why?

JackS

I'm not smart enough to outright dissagree but until this is explained, it just doesn't make sense.

SpitfireS

The updated oil jet bolts allow more oil flow (= they have less flow resistance), so going by just that statement one could think that when the engine is in an oil starvation state more oil would flow through the jets leaving less to go to the bearings.

But the jets, old style and updated, have a spring loaded valve in them.
So it takes some(*) oil pressure to keep them open.
A low enough oil pressure drop would close the valves taking them out of the oil system, so to speak.

(*) IIRC there is a spec in the service manual on oil jet valve opening pressure.
Did this spec change for the new bolts?

How low does the oil pressure have to drop to call it oil starvation?
If that is above oil jet valve pressure then it could have an affect.
Below oil jet valve pressure it doesn't., the jets are closed.

RedY2KS2k

My apologies: I wasn't aware that the oil jet bolts had a check valve. Thanks for correcting my mistake.

zeroptzero

yup and they do take a fair bit of pressure to open, so I think during a period of starvation they would shut pretty quickly. Good feature I guess.

You encouraged some good discussion though

zeroptzero

The updated oil jet bolts and a baffled oil pan are now on my "to do" list for 2012 and will be on the car prior to next year's driving season.

SpitfireS

In my service manual they spec a minimum of 2 bar - 29.4 psi to open the valve in the (old style) oil jet bolt.
The oil pressure at operating temp at idle (with a 30 weight I assume) should be 2.5 bar - 36,7 psi.
They don't spec the oil warning light pressure.
Anyway.. if the oil pressure drops below 2 bar the jets are closed.

aCab

Are you sure you are experiencing oil starvation on track? It sounds like you're too nice to the car to drive it hard enough to experience it. Are you on r-comps when you track?

Does the motor feel like its lugging during cornering? It may be fuel starvation rather than oil starvation.