Oil Pressure, Head Restrictor, Big Pump = Too Much Oil

[BoostdR]

metric?. my gauge reads in psi i just converted it for you guys.. believe me when i did a compression test this week and the cam covers were of as i was checking valve clearances at the same time, with the cas disconnected and wot the oil that was being pumped to the cams was unbelievable. i suspect with a 1.5 mm in there and 8000rpm there would be a gallon a miniute in them covers, no cam baffle will help that, its no wonder they breath. if i built another i might even reduce it more, its frightening how much oil get up there from such a small hole, god forbid i left both the oil feeds in, the sump would empty..lol

I was referring to the .65 of your restrictor. 65 thou ? I gather it is in mm

[JonnoHR31]

.65 thou? that would certainly stop any blowby....

[r33_racer]

Not blowby, the amount of oil flow to the head.

[rockabilly]

yes mate .65mm. tomei supply 1.2mm in the h/g kit, we have blanks made and drill them to what we feel we need. take a look at the banjo,s that come with hks turbos, the oil feed ones, they have a restrictor fitted in the end it is like .9 mm i think. tiny really if you think about it and thats supplying the turbo bearings,i know they are bb and dont need alot of oil..

[jarrod83]

awesome read, im a little confused with the line that vents the air from the crankcase to the catch can.. if you weld the return onto the sump will it actually be sitting below or above the oil level?

Jarrod

[BoostdR]

awesome read, im a little confused with the line that vents the air from the crankcase to the catch can.. if you weld the return onto the sump will it actually be sitting below or above the oil level?

Jarrod

I will post some pics up of my setup when I'm at the track on Saturday. Best to have the return above the oil level and on the passenger side as there is a lower pressure on that side due to the clockwise rotation of the crank. I use the dipstick tube however.

[r33_racer]

That is exactly right.

[BoostdR]

Best picture I have atm

[rockabilly]

oooh i spot bomex and volks in that pic ,nice

[N1GTR]

Really nice front lip

[BoostdR]

oooh i spot bomex and volks in that pic ,nice

You spot Trust and ROH Modena

[rockabilly]

lol nearly , never heard of roh modena, aussie thing?.

[BoostdR]

lol nearly , never heard of roh modena, aussie thing?.

ROH Wheels Site

Oh yes, they are Aussie. Good wheels 3 piece design.

[BoostdR]

I will post some pics up of my setup when I'm at the track on Saturday. Best to have the return above the oil level and on the passenger side as there is a lower pressure on that side due to the clockwise rotation of the crank. I use the dipstick tube however.

I now have a sump return on my secondary catch can to the turbo oil return as well as the return to the dipstick from the primary catch can... is my problem sorted now you ask?.....nope still fills both cans.

I am begining to think my Mines baffle plates are not doing there job in my senario. I had a close look at them. Once oil gets above the baffle there is no way for it to return until the car decels. The std baffles have a return near the rear with plastic diffusers... I will show you why I think these don't work for me.

[DVS JEZ]

its hard to tell from the pic, but do you run a Autech type can on top of the rockers? if you dont you should try on, this is like an extra baffle on top as it will hold enough oil to stop it filling the catch cans, then when it gets a chance it will return in back into the top of the head, if it does fill it then it will overflow into your other catch cans then into your sump through your oil return

[BoostdR]

I might look at adding the std oil return diffusers from the std plate to my Mine's plates.

Here is an example of the G forces...

[BoostdR]

its hard to tell from the pic, but do you run a Autech type can on top of the rockers? if you dont you should try on, this is like an extra baffle on top as it will hold enough oil to stop it filling the catch cans, then when it gets a chance it will return in back into the top of the head, if it does fill it then it will overflow into your other catch cans then into your sump through your oil return

I do like the idea as the gibson GTR runs a similar setup. The problem I have is clearance with the Rb30 block and all. Maybe I could look at a custom setup using that principle.

[XRATED]

I might look at adding the std oil return diffusers from the std plate to my Mine's plates.

Here is an example of the G forces...

Add a drain line above the baffle plate on the side of each rocker cover, that runs to the low pressure side of the sump.

I'd also look at a -10 line from the crank case, dip stick side to a breather can to relieve some crank case pressure.

GL

J.

[DVS JEZ]

I do like the idea as the gibson GTR runs a similar setup. The problem I have is clearance with the Rb30 block and all. Maybe I could look at a custom setup using that principle.

Ahh yep. That sux

[jarrod83]

out of curiousity did you drill out the oil returns in your block/head as well as enlarging the 2 rear oil drain oils in the head??

one of the holes in my head is barely a hole at all, the smallest bit is at least a third the size of the narrowest point in the block.

did you end up checking your crankcase pressure with your map sensor?