The 18R-GTE reference manual ...

[o_man_ra23]

Correct me if I am wrong, but wouldn't it be easier just to remake the whole schebang?? Once you have a computer model, its just a matter of putting it in a CNC machine... then you don't need to drill dowels, you don't need to interference fit them, and you don't need to worry about them vibrating themselves to death.

Nice looking models, I just think that with what you have there, it would actually be cheaper to remake them from scratch... you also don't have a worn out 18R-C pump as a starting point either.

[Sagluren]

it looks the like a good idea, please excuse my poor physics knowledge but since you are doubeling the length of the pump, wouldent the increased flow and pressure be close to a 50% increase on the standard pump.
If what I have said is correct would you not have problems with to high oil pressure, ie. Blowing seals out and to much strain on the timming chain,

Sorry if im wrong but was just thining out loud so to say.

[The Witzl]

Sagluren.... he isnt intending on doubling the length, only adding an extra 10mm over the stock 18R-C pump. This would make it 5mm taller than the 18R-G pump (since 18RG 5mm taller than 18RC).

CNC machining would not really be cheap for a one off (or even a 5-10 piece run). We could always find out though!! I have spare pumps to offer as samples.

[roadkill]

Hi,

The original 18rc pump impellor is 25mm. The 18rg is 30mm. This one would be 35mm long, so it would actually be about 15% more than the rg give or take. The pressure should still be much the same as it is controlled by the releif valve in the oil pump. You need more volume for the turbo hence bigger oil pump. You'd need some sort of valve (if the turbo doesn't have one in it already - i'm new to turbos) to control the amount of oil going there. Unless you muck around with the pressure releif valve then it shouldn't have that much of an effect on the rest of the workings of the engine ie chains etc. My mate has an external oil cooler on his 18rc (using a plate between filter and block) which i'm sure could be used as an oil feed for the turbo.

That raises a interesting point. What have people got planned for oil into the turbo???

Owen - don't happen to know anywhere is brisvegas i could get a pump made up???

bEn

[roadkill]

Sagluren.... he isnt intending on doubling the length, only adding an extra 10mm over the stock 18R-C pump. This would make it 5mm taller than the 18R-G pump (since 18RG 5mm taller than 18RC).

CNC machining would not really be cheap for a one off (or even a 5-10 piece run). We could always find out though!! I have spare pumps to offer as samples.

Damn, beat me to it. I've got about 3 spare rc pumps, that's what led me to the idea. Gonna chat to my mate in the next few days anyway. He may also know of where a cnc machine place is.

bEn

[Sagluren]

well there you go, you learn somthing new everyday, thanks for the reply

ive got to spread the love

[o_man_ra23]

The other thing is that a machinist would be able to lathe and mill the shaft in about 5 seconds, so again it would probably be cheaper than lining up and dowelling the extension. The hard work is in the machined edges, so I doubt if it would cost much more if any to get the whole thing made from scratch.

As for the pressure and flow, the relief valve, as stated, controls the pressure, so no problem there. The turbo will flow as much as it needs, just keep the pressure constant. The 18R blocks have 2 outlets for pressure senders, with one blocked off with a bung from factory. I will be using the other outlet for my oil feed, then the output of the turbo goes through a big pipe straight into the sump.

Ben, sorry champ, don't know anyone in Brisneyland that could do anything like that. Certainly worth getting prices on doing the whole lot as opposed to extending stock pumps.... would be worth the extra I would imagine.

[roadkill]

Hi,

definately agree with getting the whole thing made up new. Then we can just get whatever size we want/need. Also get them to make up the extension housing.

Sounds good with the oil feed plans. I assume the one you're using is where the 18rc pressure switch is at the front of the block??? You gonna go up over the engine or underneath it? What piping are you using?

Looking forward to seeing it done

bEn

[ra_28]

Some of the oil filter housing not all have a 1/8 plug in the side of them perfect for a oil feed for the turbo. That is what i used.

Cheers
Alex

[o_man_ra23]

I will be using bundy tube (fixed line) and go in front of the motor, between the crank and water pump probably, or between the water pump and head. Will look at what space I have later.

For me the oil filter housing idea would entail longer tubing, not the best of ideas. But... in saying that, you may be able to tap a 1/8 NPT thread into the side of the housing if yours didn't already have one, and you were certain you wanted it coming from there.

[ra_28]

Yeah why not the turbo is getting cooler and cleaner oil. The oil pressure sender is the last to get oil so it's hotter and has the opportunity to collect any forigen matter along the way.

[RA23]

About the RC/RG pump extension plans: the tolerances inside pumps are pretty tight, I wouldn't want a join in there (impeller or housing). About cost: forget dowelling, machining new ones from scratch will be cheaper (although that depends on the shaft connection)
Other issue, what material to use? I would think the originals may be hardened at least.

[o_man_ra23]

Originals are aluminium are they not?? Heat treating isn't super hard... the heating and cooling rates just need to be monitored

[Steve M]

The original internals are not aluminium, it is a bitch to file out the little lumps of metal that get stuck in them. They are some sort of hard steel.
The housings are aluminium, which is why they wear so much faster than the steel internals.

I vote for CNC new rotating parts and a 15mm (replace 6-5mm 18RG ones) spacer for use with the standard 18RC housing.

I'm doing machining at TAFE at the moment, and am learning hwow frickin' long it takes to set up a machine to do anything properly.

While we're at it though, why not think about some new oil pickups too, ones that are centred in the sump?

I reckon I'll be making up a new centred bottom end for my oil pump before I stick the engine on the road.

I do look forward to seeing how this all works out, I would like a few good big pump internal sets. I need about three sets.

[RA23]

I'm doing machining at TAFE at the moment, and am learning hwow frickin' long it takes to set up a machine to do anything properly.

Machining is not the issue. Any good CNC shop can do that. The problem is generating the two geometries properly and defining the right tolerances, surface finishes and material qualities.

I just pulled one apart (an RC and an RG) and checked if there are any other issues. I noticed the RC and RG shafts are not the same length. There are two options:
1 - use existing RG or RC shaft and don't worry about the small pocket down the bottom (this may slightly decrease the quality of seal between intake and discharge)
2- machine new shaft as well - PITA

O, and yes: internals are definately steel.