Oil surge

iaint · July 18, 2005, 10:02:56 AM

Had a fun day out at brunters today with a bunch of car enthusiasts (//www.vmax15000bhp.com). Bit hot for really good run from the car and had a few technical problems.

Fortunately a trip to portsmouth on Saturday probably saved me from worse problems as the car was running lean before (293rwhp after a new fuel pump and mapping, thanks Max et al.).

Noticed something that gave me a little cause for concern - after hard right hand cornering while also hard on the throttle there was quite a large cloud of oil smoke left hanging in my wake. Oil levels were full, possibly a little full as even after a day of playing there wasn\'t a noticable drop in the level!

Is this a problem or not really something to worry about?

Iain

PS Saw 153 through the speed trap (speedo showed 165) which was due to it being excessively hot yesterday - should see 160 on a cooler day I think.

g11ary · July 18, 2005, 10:54:52 AM

More likely to be fuel cut on hard corning if tank is say 1/3 to 1/4 full, then you would probably see a puff of black smoke when it comes back on, cant imagine it being oil serge mate.

iaint · July 18, 2005, 10:59:01 AM

Quote from: g11aryMore likely to be fuel cut on hard corning if tank is say 1/3 to 1/4 full, then you would probably see a puff of black smoke when it comes back on, cant imagine it being oil serge mate.

Definately not fuel cut - no loss of power or jerkiness and almost full tank of petrol.

Wasn\'t a small cloud either - looked as though I\'d been doing a stationary burnout!!!

MikeLMR · July 18, 2005, 11:30:54 AM

oil level changing due to surge and moving above the level of the turbo drain ? could it be that the oil seals aren\'t quite as good as they were when new ?

iaint · July 18, 2005, 11:49:47 AM

Quote from: MikeLMRoil level changing due to surge and moving above the level of the turbo drain ? could it be that the oil seals aren\'t quite as good as they were when new ?

I\'m not sure of the layout but the oil would be higher up in the left of the engine (from drivers position) so would be towards the turbo side..., could explain it. Would doubt it\'s the oil seals as it was rebuilt ~12k miles ago and has had a reasonably easy life since then.

MikeLMR · July 18, 2005, 11:59:33 AM

sorry turbo oil seals ... not engine

Fish · July 18, 2005, 12:04:22 PM

Hang on, how can it be on the side of the turbos.... You was going around right handers! So more over towards the filler neck and dipstick.

Fish

iaint · July 18, 2005, 12:28:35 PM

Quote from: FishHang on, how can it be on the side of the turbos.... You was going around right handers! So more over towards the filler neck and dipstick.

Fish

Good point, being thick I am.

fro · July 18, 2005, 12:55:13 PM

I think this problem is due to the oil running up the filler neck and into the inlet. Time for a catch can and removal of the pcv maybe?

iaint · July 18, 2005, 01:51:40 PM

Quote from: froI think this problem is due to the oil running up the filler neck and into the inlet. Time for a catch can and removal of the pcv maybe?

Catch can might be a good idea - getting quite a lot of oil blow-by. Woss the PCV?

fro · July 18, 2005, 02:41:37 PM

Quote from: iaintCatch can might be a good idea - getting quite a lot of oil blow-by. Woss the PCV?

It\'s a one way valve between the oil filler neck and the throttle body. You shouldn\'t need it with a catch can vented to atmosphere and I\'m guessing this is where your oil is being sucked into the inlet tract

iaint · July 18, 2005, 02:44:02 PM

Cool, useful info, thanks!