400rwkw R33 Gtr Track Day.

[BOOSTD]

I attended a track day a Mallala on Saturday, had an absolute ball. I did however have some issue's.

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-My Oil/Air separator would fill in one 15min session(400ml).

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-My Atmo BOV's were spitting out so much oil the side of the car was coated.

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-After a heavy G-force loaded corner(not the straight) a large puff of smoke would come out the exhaust on gear change

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-My dip stick blew out twice

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-All of which required the replacement of 4ltrs of oil.\

The car was running 30psi of boost for 40% of the day. I would like to ascertain if my oil control issue's are attributed to blow-by(CP forged Pistons, 1mm oversize valves--with new valve guide's) or incorrect oil/air separator setup for my huge boost levels. I am running a N1 oil pump, big sump and the 1.5mm restrictor in the block has been removed(previously fitted with the std sump).

Plans before the next track day so far are.

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-Plumb my catch can into the sump

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-run less boost

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-heat shrink my dipstick to hold firmer(however I think this is a symptom fix)

Edited October 1, 2007 by BOOSTD

[STATUS]

oh dear could be a few things but if your bovs are venting oil and your oil air separator is to atmosphere you have turbo issues. if it is recirc you have either oil surge of excessive blow by. the puff of smoke leads me to believe surge but without seeing the car in person it is a guess at best.

[BOOSTD]

Turbo's are 3months old Garrett items. The Oil/Air catch can is plumbed back in the intake.

Any tests could do to narrow it down?

[SevenAngryPenguins]

have you read this thread

http://www.skylinesaustralia.com/forums/t1...;hl=oil+control

[STATUS]

^^^ its a bit long winded..... we spin our 350rwkw 26 to 8000 all day long at track days with only sump baffle and head oil restrictors.... most issues are build related like piston to bore clearance and bearing clearance etc....

[STATUS]

The Oil/Air catch can is plumbed back in the intake.

Any tests could do to narrow it down?

this pretty much rules out the turbos, do you overfill? do you have a sump baffle?

[BOOSTD]

Well the head restritor is one thing I don't have with my N1 pump, I guess the fix for that without pulling the head is an external drain from head to sump.

[BOOSTD]

I have the std sump baffle from memory. Sump takes 6ltrs, not overfilled according to my dip stick....

[STATUS]

Well the head restritor is one thing I don't have with my N1 pump, I guess the fix for that without pulling the head is an external drain from head to sump.

just as easy to fit restrictor.... to do the drain properly requires either engine out or head off anyway.

[paulr33]

why so much boost? is it really necessary?

thats a lot of pressure you are forcing through (and heating up)

[1400r]

put a filter on the top of your catch can equal to the size of the hoses going to it

i.e 2 2.5cm hoses then 5cm fitting filter

mate did this on his ceffy that use to filer his catch can every three laps of Mallala

and now has no blow by

[BOOSTD]

I might try starting with.

-return to sump catch can

-Triple flow cam cover baffle

http://www.mines-wave.com/JP/CATALOG/ENGIN...AFFLE_PLATE.htm