For the love of a tractor engine: The life and times of the 18R-G

[Steve M]

coronas have different sumps to celicas, and hence, lower pump bodies differ.
The lower section of the pump is completely interchangable.
Celica pumps had a pick up that goes straight down from the pump body, corona pumps curve inward toward the centre of the engine by about an inch, toward the front of the sump by about and inch and reach 5mm deeper too.

The extra reach toward the centre is a good thing, but the forward location is not as good for celicas as under throttle (high revs) you want you pickup at the back of the sump where all the oil just went. I'm not sure if the depth will clear a celica sump.

corona on the left, celica on the right

[RAd28]

awesome, thanks for that steve... i'm making a trip to the wreckers this weekend fo'sho...

hypothecially... say you were to drop the oil pickup even further with say... a piece of rubber hose, and space the filter gauze accordingly... do you think this would be as effective as it is dodgy???

and another thing... are there any options for suping up the oil system in general? other then an auxilary/replacement oil pump?

[Ren_RG28]

I'm keen to find out more info about upgrading the oil system myself. I'm getting my sump baffled as part of the rebuild as my oil light used to come on when I took a corner a bit fast...

[alfie1]

Hi all

I recently purchased a TA22 with an 18rg. It currently is fitted solex's and foam ramflo filters. Can anyone suggest what is considered to be the best filters for these engines/carbs please? I have heard on these threads that foam tends to break down and can cause problems.

thanks


ALF

[sillycar chick]

Talk to Rodger and get yourself some ram tubes and socks. They are better in terms of performance than the ramflos. I just bought some from him, just waiting for them to arrive now

[Spectre]

Omegaman - you're right there, the 18RGEU pistons use 2x 1.5mm compression rings, while the 18RG/18RGU pistons use a 2.0mm top and 2.5mm second compression ring. Both pistons use 4.0mm oil rings

So can I buy a set of 18RC rings and have the top and second rings machined down to 1.5mm?

Or is it better to find some 18RGEU rings. If so, anyone ever brought some?

[abently]

So can I buy a set of 18RC rings and have the top and second rings machined down to 1.5mm?

Or is it better to find some 18RGEU rings. If so, anyone ever brought some?

I wouldn't recommend you start shaving the thickness of rings down....... as you will probably find that the depth of the ring grooves are different from the two different Piston combinations.

Go Factory Toyota Australia to get the proper rings or get them overseas. Eitherway, you shouldn't need to compromise.

[The Witzl]

Spectre - omegaman was saying that he got his 18R-GEU pistons machined to accept the thicker 18R-C rings that you can buy from just about anywhere.


As for sumps and pickups - im watching this closely. I'll also get a picture of a front sump setup I have at home which looks different to the corona pickup above.
The front sump looks like a much better "pool" for the oil (deep and narrow) and the pickup is well centred in that sump. Hopefully this might help.

Of course this will also need a TA23 crossmember with modified engine mounts (i have the x-member...)

If all this doesnt work for me, i'll just go with the baffled/flapper/winged sump idea

[timbosaurus]

So can I buy a set of 18RC rings and have the top and second rings machined down to 1.5mm?

Or is it better to find some 18RGEU rings. If so, anyone ever brought some?

Or replace the 18RGEU pistons with 18RG items. The 9.7:1 pistons are hard/expensive to find, but the 8.7:1 items from the 18RGU will give you a slight increase in compression over the 18RGEU (8.3:1?) ones, and are compatable with the easy-to-find 18RC rings. They are pretty easy to find too, as they are the most common 18RG engines in Australia, and are also often replaced with the 9.7 items.

Not sure if a piston swap (and matching block prep) is within your timeframe/budget though.

Cheers,
Tim

[Fish]

what size are the 18rgeu piston?

i think the g200 gemini runs a 0.060" ring size. or any gemini engine

from 82 to 88.5mm piston.

[sillycar chick]

Tricky,
I have no idea how they are fixed. It doesn't appear that they are.

They are 2TG gears, whic means they will fit 18RG cams.
vernier adjust ~ $200 + freight
13 hole adjust ~ $93.75 + freight (based on 80y:$1 exchange rate)

I reckon I'd be putting a hole in them to locate them if I got some.
Both gear types come from Japan, Kameari Engine works, but I can't find their site.

PitRoad Motorsport in Japan stock them.
Here are the 2TG catalogue pages:

http://www.pitroad-ts.com/kameari-2/kameari19.htm
http://www.pitroad-ts.com/kameari-2/kameari20.htm

They also sell 92mm and 92.5mm 18RG pistons
~ $812 + freight
http://www.pitroad-ts.com/kameari-2/kameari07.htm


I'd like to get some of those gears too and I like the look of those pistons, but the prices are a bit high.
My custom pistons are going to be AU$828.60 delivered (+ rings)

I know this was posted a while ago, but I tried to follow the links again and couldnt. But I found Kameari's site, its www.kameariengineworks.co.jp, or you can use this link which is google translated:

http://translate.google.com/translat...Den%26pwst%3D1

Anyway ive been wanting a set of those vernier gears for ages to use on the 3TGTE. I have a contact in japan who *might* (and that's a might, i havent even asked him yet, so no guarantees) be able to get some sent over. Would anyone else be interested? I know they are expensive, but Jamie made cam gears for the 1Gs and they were $350 a set... these are roughly $200 from japan, but then you have to convert it to AU$ and pay shipping... and i dont even know if thats each or a pair!

[Fish]

been doing some thinking lately about sump baffeling, and trying to figure out the best (most effective and easiest) way to do it, got a few ideas, and i'd appreciate comments on each.

1. piece of 4" exhaust pipe welded into the sump to surround the pickup, and act as a surge tank of sorts, would obviously have to have lots of small holes drilled into it to allow oil to flow in freely. cut slots around the base.

2. sump gate setup... just a simple one, with a fixed piece welded in (laterally) on a small angle (leaning to the right) and have a flap hinged at the top with a counter weight on the bottom, so that as the vehicle takes a right handed corner, the gate closes up and prevents/limits the oil flow to the left side of the sump, but once the car has straightened up again the gate opens...Use with option 1 and have the slots aimed at the gates. Use 3 gates. one left and one right and one at the back of the sump.

3. foam... well... coarse steel wool or something similar to slow down the sloshing of oil around the sump... could be set up any number of ways, a for example, a fence around the oil pick up, or almost fill the sump with steel wool leaving only the oil pick up free... biggest problem i see with this is the possibility of metal getting picked up and sent through the engine... Pereforiated stainless steel sheet will work well

i'm incline to think #1 would be the easiest, but just wondering if anyone else has suggestions to bring to the party...

cheers

thats would be the way to go. Maybe add some wings to increase the capacity too.

[ra23celica]

Anyway ive been wanting a set of those vernier gears for ages to use on the 3TGTE. I have a contact in japan who *might* (and that's a might, i havent even asked him yet, so no guarantees) be able to get some sent over. Would anyone else be interested? I know they are expensive, but Jamie made cam gears for the 1Gs and they were $350 a set... these are roughly $200 from japan, but then you have to convert it to AU$ and pay shipping... and i dont even know if thats each or a pair!

I reckon I might be up for a set of these.

[Steve M]

I can't see a dowel hole in the centre flange on those vernier gears, I reckon you'd want one on there.
For the early model cams, I'm just getting the standard gear holes slotted and adding two more holes in them, thatway I can use the original gears (I've got some brand new ones) as vernier adjust gears.

We've recently had another four holes put in some later model gears at the same hole spacing as the original dowel holes. Without gettin the cams redrilled at all, the extra holes allowed enough adjustability to set up some wade cams that we couldn't use before.

[hosking1991]

The Early 18R-G, number 88210 and 88230

These were the most powerful of the 18R-G engines, with a boasted 140hp from the factory and running a pair of Mikuni Solex DCOE carburettors.
Compression was a high 9.7:1, there was no pollution/emission control gear, and the cam profiles are the most aggressive of all the 18R-G engines.
The heads are commonly considered the worst of all the 18R-G heads - rumoured to have smaller valves, and definitely having smaller ports, their overall design is improved upon as the engine went through its phases.

i have just taken the head off my 18rg (88230 head) should i measure the valves?