I have been reading a few threads of engines going bang on track days and when drifting, and the answer always seems to be fit a dry sump kit.

 

Who makes them? hw much are they? and are there any other benefits/drawbacks to having one fitted?

 

Is it a big job to have one fitted?

Don't know of anyone that makes one off the shelf for the VG30, would be a nightmare to fit in there but if you loose the air con you could do it. For my VH45 install I designed one using parts from pace (http://www.paceproducts.co.uk) very helpful blokes and pretty much every racecar in europe uses their stuff, the quality is unbelievable. Biggest problem in the Z is space, you need to fit the tank in the boot then run -16 lines back and forward to it.

I'd budget for around £3k all in to design and build a system, pump ~£1k, plumbing, cooler stat etc. £1.5k then some hardpipe and fittings,sump pan, breathers etc.

Advantages are no oil surge ever, no level of oil in the sump so more power due to less losses from slapping around in oil and you can run the crankcase at vacuum so pick up power there from reduced pumping losses moving air around. Also obviously you reduce the height of the sump pan to minimum so can lower engine for better C.G. and possibly move it back to reduce polar moment.

Some pics of mine attached to give you an idea of what's required.

16 lines

 

ye god im trying to loose weight not put it on.

16 lines

 

ye god im trying to loose weight not put it on.

 

Lol, no, I meant -16JIC Size lines (1") only two: one to feed the pump pressure stage and one scavenge return to the tank.

why not just extend it like they all do on the skyline as it suffers from the same problem?

 

you can buy several sump extentions for the skyline and i cant see it beeing too much work to make one fit a 300zx

 

Mike

You'll need to baffle it internally too to get any real benefit. If you just extend it it just gives the oil more space to move away from the pickup into.

You can try an accusump too. It's a cannister that holds oil at pump pressure to deliver to the engine if the pump starts pumping air under surge. Would be OK for the odd surge on cornering but not for sustained surge as it just runs out!

Enlarge the sump and you need to put a baffle in with a trap door, your dry sump set up looks fantastic.

You'll need to baffle it internally too to get any real benefit. If you just extend it it just gives the oil more space to move away from the pickup into.

You can try an accusump too. It's a cannister that holds oil at pump pressure to deliver to the engine if the pump starts pumping air under surge. Would be OK for the odd surge on cornering but not for sustained surge as it just runs out!

 

the trust one comes baffled :)

 

the only thing is the 300zx one is metal, the skyline is ali so to fit them you just cut the bottom of the old one and weld up the new bigger one so not sure how you could make it fit, whether you could make a metal one with baffles and weld this to the existing sump?

Ah, you're talking about extending it to make it deeper.

You could cut and weld the 300 one but I'm not sure there is much room to do it, I've seen a few grounded stock sumps!

Ideally if you make it deeper you should get a new oil pickup pipe too to take advantage of the added depth. I'm guessing trust supply that in the kit too.

SpecialtyZ do a larger sump with baffles and trap doors. Mine should be here this week so I'll take some pictures.

From what I understand it's no deeper so doesn't affect ground clearance.

 

John,

Another thing they mentioned is speeding up the oil return from the heads back to the pan by adding some new lines. What do you think of this?

I think you would need to go out sideways on the zed sump as it does hang pretty low, i know a few of the skyline boys have extended theirs sideways on both sides rather than going down

side ways is the way to go, down could lead to problems.

 

Oil starvation in the sump with regards oil not retuning quick enough from the heads has been raised with the ca18det as it can suffer the same problems and has a history of killing bearings

All great ideas.... but I am not skilled enough to make one myself. Is there nobody out there who can do this for me?

how much are the ready made sumps? would like to fit one to my next engine before it goes in.

SpecialtyZ do a larger sump with baffles and trap doors. Mine should be here this week so I'll take some pictures.

From what I understand it's no deeper so doesn't affect ground clearance.

 

John,

Another thing they mentioned is speeding up the oil return from the heads back to the pan by adding some new lines. What do you think of this?

 

ive looked all over their site and not found anything.

it's not on the site, you need to talk to them. They also need a core but I luckily spotted someone selling a TT pan state side :)

Will post pics and details once it's here

http://twinturbo.net/net/viewmsg.aspx?msg_id=1927745&forum=general

See the bottom of this thread for a dry sump system, installed on Zed

http://www.twinturbo.net/net/viewmsg.aspx?forum=general&msg_id=2116231

 

The Specialy-Z oil pan has arrived too ;)