Baffled Sumps

[GTS-t VSPEC]

Hi Guys,

I was just wondering whether anyone has baffled there stock GTS-t sump to suit circuit racing.

I have heard that it is quite easy to do but was after suggestions on how others have done it before I wreck a perfectly good sump:D

[Ender]

I was thinking of doing mine too...any pics of any baffled sumps?? or confused sumps....

Any help appreciated...

Cheers,

Russ

[GTS-t VSPEC]

I know that Nismo do a baffled sump. But instead of paying $500+ I'd rather try and do it myslef:D

[GTS-t VSPEC]

Check here for a pic of a competition sump.

http://202.139.242.57/pricelists/skylines%...ine%20parts.htm

[Silver-Arrowz]

It was mentioned before that it's worth getting only if your using slicks because with road tyres you don't generate the forces to cause oil starvation.

It was from another thread, not sure which one though. Ie. I'm too lazy to do the seach...

[Duncan]

me 2 lazy 2.

but in the same thread I think it said that the starvation prob only affects GTRs.

I run mine on R tyres at the track all the time and haven't blown anything up yet .

[hungry6]

yep it's dead easy to baffle ur sum. also there are may other way to do it with filler elements, but yes, ppls say they haven't blown anything up, next time they hear a knock from deep inside, u know that the big end bearings.

[GTS-t VSPEC]

I want to make sure that the engine is never starved of oil, so does anyone have any designs they've used?

[Sydneykid]

Hi GTS-t VSPEC, we extend the sump width (not depth as it is already too low). The extensions each hold 1.0 to 1.5 litres of oil when full. This is an old, tried and proven layout, simple and effective

We then put one way doors into the extensions from the sump such that the doors open from the wings inwards. This stops the oil in the sump pushing the door open, only oil in the wings trying ot get inot the sump can push the doors open.

So the doors stay closed when centrifical force is trying to push the oil from the sump into the outside wing. The oil flows from the inside wing into the sump under the same centrifical force. This makes sure that you always have the sump full, thus no oil surge.

This is much harder to explain in words, compared to a drawing, but I hope it makes sense anyway.

[Ender]

Thats easy to picture...Thanks for that.

[GTS-t VSPEC]

Sydneykid, That give me the right idea, thanks for that. I'll give it a go and see what happens:D

[Sydneykid]

Hi Guys, I'm just in the processes of fabricating one for the new RB31DET, I'll post some pictures when it's done. If you finish yours first, I'd like a look.

[ed]

Originally posted by Sydneykid

Hi Guys, I'm just in the processes of fabricating one for the new RB31DET, I'll post some pictures when it's done.  If you finish yours first, I'd like a look.

Sydneykid, are you going to make a few of these? Or is that just a once off thing?

It sounds like a good idea.

[GTS-t VSPEC]

There are some 7 litre sumps for $700 but I think I could make mine for much less:D

[ed]

7 Litres? damn...too bad no1 sells 7L bottles of oil

[Sydneykid]

Hi ed, we are currently doing 5 X RB31 bottom ends and I think 3 of them are getting winged sumps. So another couple will give the fabricator a bit of a run (I fibbed before, I'm not actually doing the cutting and welding, he is, I just do the design and measure). Cost in mild steel would be around $400'ish if you want to join in, you supply the standard sump. I'll confirm the price in a couple of days if you want something more exact.

[Sydneykid]

Hi ed, we buy 3 X 5 litres of Formula R and have 1 litre left over for top ups.

[GTS-t VSPEC]

Sydneykid, So it's not advisable to make the sump deeper? I have heard that people put a cylinder around the pickup to make sure it always has a body of oil around it, have you heard of this?

Do you change the oil pumps aswell?

[Sydneykid]

Hi GTS-t VSPEC, we have ground clearance issues, even without making the sump deeper. Plus you have to extend the pick up which can be tricky and dangerous. Sticking a baffle around the pickup is OK as long as you put one way doors in it as well. But it doesn't increase the capacity of the sump. Which is really an issue in RB engines as at big RPM they carry a lot of oil up high, around the camshafts and valves, not in the sump.

Oil pumps are a bit of a pain. I would like to run a higher flow but standard pressure pump, but they aren't available. They are all higher pressure, some have higher flow as well . Plus the prices make my nose bleed. So I just use the standard R33 GTR pump, with an adaptor ring if it's an RB30 or R32 GTR crank. Never had problem, even with oil coolers and remote filters which put extra load on the pump.

Hope that helps