rb30_bmw

Thanks jangles, I have read this thread many times. Although your solution is mentioned throughout the thread, it has some flaws in it which include not really addressing the issue but instead trying to mitigate the subsequent excess oil result. Obviously without pulling the engine down I have limited options. I'm pretty sure dry sumping it (although expensive) is a sound solution as it allows the car to be driven on the track without any associated oil issues. Part of the dry sump conversion involves a scavenge tank from the back of head plumbed back into the oil pump so it addresses the excess oil issue without creating any atmospheric component to the oil circuit and assisting with equalized pressure between crankcase and head. Aithout choosing to go for this option, I believe the other most viable option is to go for an external drain from the welsh plug to the passenger side (RHD) of the sump, block the PCV and move the rocker baffles back to assist the drain back to return oil to the sump.

This thread is really getting off topic. Johnnyt and bubba, perhaps you could start a new thread regarding nose extensions.

Are these guys not Performance Unlimited? Do I have my wires crossed somewhere?

I have read this entire thread as the oil pressure issue is what I'm looking for a solid solution for. At some point there was a fairly clear outcome (basically the oil drain from the back of the head into the sump) but by the end, and after some off track wanderings, I'm still not sure. So ... I have 2 very simple questions that only require a yes or no answer ... since my RB25/30 is assembled and in the car with all ancilliaries fitted. Q1. Can I do the plumbback mod from the welsh plug to the sump without pulling my engine out as there doesn't seem to be working access to the rear of the head? Q2. If i'm pulling the engine out and money is no object (obviously it's a factor but for the sake of getting a clear answer) am I better off going for a dry sump conversion?

Thanks for your input guys ... after reading the other threads it would appear that this is a fairly well known problem (to everyone other than my engine builder). I am weighing up the options of going to a dry sump setup which most race cars have anyway ... then I have a solid fix for the issue and more flexibility with the engine also. Thanks again, much appreciated.

Thanks mate.

yeah man I get it ... any recommended suggestions? (these guys actually were recommended to me by someone at the track) If your car is heavily modified and your not a mechanic then you'll understand that it's hard to find someone trustworthy that knows what they're doing and actually gives a shit about doing a good job, the first time!

yes it was ... Steve Myburg is the driver

Yeah cheers I'm reading that thread now ... still deciding over oil control or dry sump conversion. All down to $$ I guess. Previous question was related to whether or not anyone has been told by Performance Unlimited that they don't do imports coz I'm pretty sure they do ...

This thread is linked to an earlier topic relating to performance workshops in Perth ... I was at Barbagallo a couple of weeks ago and met a guy who has a full blown 'Sports Sedan' 180SX with fibreglass panels and a fully stocked RB25/30 (same engine as mine) with solid lifters etc. pumping out over 600bhp ... apparently gets all his work done at Performance Unlimited. I'm confused ... has anyone actually been told by them that they don't do imports? I'm looking for somewhere to get work done on mine and don't want to be a cash cow or guinea pig (again). Having issues with high oil pressure pushing oil into the catch can, out of the breather and into the engine bay. Not cool when you're coming onto the straight at Barbagallo and the rear steps out because the tyres are covered in oil!

Do you know if the starter motor will fit an RB25 R33 S1? If so how much do you want for it?

Except the problem you find is every tuner is biased toward a specific ECU ... I would be getting your head around tuning aspects (most new ECU's all do the same job, rich/lean/stoich/WOT/timing etc.) then you're less likely to get screwed without a reach around