Rb26 Sump Extention?

[GTR 94]

just a quicky and not sure if it should be in this section but here goes, im doing some work on my motor and i have been asked if i would like to put a sump extension on the RB to hold more oil, the car will be seeing some track work and i am getting this at a good price so are there any cons to doing this mod. all i really know is that we gonna need to cut my original sump and weld the aftermarket one on.

thanks.

[T04GTR]

a good idea to do.

[T04GTR]

but still fill it up to the hump on the dipstick

[Blitz]

I am running the Trust sump extension on my GTR - for the cost of the sump add-on kit you cant go wrong.

You get an extra 1-1.5 litres capacity, modified oil pickup and baffles.

Easy choice

[NIZ-26T]

more oil the better

for install you will need to bolt the sump down so it dosnt warp

a plasma cutter

tig welder

all pretty easy

[R31Nismoid]

whos doing the motor lee?

[GTR 94]

thanks for all the help guys.

[benm]

If only the engine didn't have to come out...

[Gav]

My concern with the simple weld on extension kits (Trust, Tomei etc) is that they hang quite low. If your car R already has lowered suspension, there is a real risk of sump damage on speed humps and curbs.

I went for the Hi Octane sump as shown below

Expensive but very well made and better clearance and capacity than the weld on kits.

Edited March 21, 2006 by Gav

[CruiseLiner]

hey gav that looks awesome quality work, do u mind telling us how much it cost? how much capacity is it now?

cheers

Brad

[Beer Baron]

that sump is a piece of gear! any pics of the inside gav?

[maccattack]

Gav's sump is through Hi Octane Racing and are built by Performance Metalcraft (I've got one too).

Interior has windage doors made from metal plate and are exceptionally well made. Cost (by the time you add freight etc) is close to $2K. I had been running a Tomei kit along with an Accusump and gallery restrictor plug and recently spun bearings.

From what I have been told, many of the off the shelf articles are great for street but are not designed for track - and cannot cope. I had considered getting someone else to make the sump extension (a little cheaper) but these guys have been doing this for some time and have been through the experimentation phase already. The sumps they build are supposed to be as good as you can get prior to going to a dry sump. Capacity goes to about 8 litres for the GTR. Engine is going back together now so I'll get to try it out before too long.

[GTR 94]

wow thats awsome might need to contact hi octane thanks again guys

[R31Nismoid]

I had been running a Tomei kit along with an Accusump and gallery restrictor plug and recently spun bearings.

modified head or not?

[Beer Baron]

thanks mac, they do look the business that's for sure. hell of a price tag though, but if you have say a $20K build (which i'd say Gav is and then some) then i guess it's relatively cheap insurance.

[maccattack]

modified head or not?

Yes, head has been ported and polished with full bench testing, Tomei Poncams and gears

thanks mac, they do look the business that's for sure. hell of a price tag though, but if you have say a $20K build (which i'd say Gav is and then some) then i guess it's relatively cheap insurance.

Especially at the moment. Scored the journals on the cranks which meant I needed a new one - trouble is, Nissan ran out of GTR cranks in November and no-one yet knows when thay are going to start making any more. No doubt they will, but when. I waited 6 weeks and finally found one through a GTR forum in the UK. Aparently these are the SH1T!!

[Sydneykid]

Yes, head has been ported and polished with full bench testing, Tomei Poncams and gears

I think he meant modified the cylinder head for increased oil return to the sump. We drill the oil return galleries and smooth the oil flow passages with the die grinder. Plus we fit an external oil return from the rear of cylinder head direct to the sump. Add this to the oil restriction (one feed restricted and one blocked off) in the top of the block and you have a good chance of the oil staying in the sump, not being trapped in the cylinder head. Or filling up your catch can.

TIP; If ordering the sump from Performance Metalcraft make sure you specify a fitting for an oil temperature sensor. Plus a fitting for the external oil return hose into the top of the LHS wing.

Cheers

[Guest Mashrock]

who had the info on a dry sump??

i remember it being bought up recently.

it looked trick..

the next time the motor comes out a dry sump system is going in.

[R31Nismoid]

I think he meant modified the cylinder head for increased oil return to the sump. We drill the oil return galleries and smooth the oil flow passages with the die grinder. Plus we fit an external oil return from the rear of cylinder head direct to the sump. Add this to the oil restriction (one feed restricted and one blocked off) in the top of the block and you have a good chance of the oil staying in the sump, not being trapped in the cylinder head. Or filling up your catch can.

Thats what i was getting at... a stock head, expect to spin a bearing or two.

The sump is a band-aid solution (and more costly aswell) if you are still using an un-modified head.

[Gav]

Just woke up and checked the thread (we're 9 hours behind in Bulgaria - physically and figuratively speaking).

OK - below is a pic of the internal swing gates. Note the hinges (gates) only swing internally both laterally (retaining oil level around the pickup on corners) and at the rear (for hard acceleration).

My last custom sump (made localy in Perth) failed at the welds and the gates weren't as good quality and reliable.

Edited March 21, 2006 by Gav