[Mk2] [Turbo] Omoni gauges

[gnzyza]

Correct me if I'm wrong but the ports on the sump are rev3 only?
What are the other option, you can weld a boss into the sump, or use a sandwich plate, or take it from the head. ?

[shinny]

Correct me if I'm wrong but the ports on the sump are rev3 only?
What are the other option, you can weld a boss into the sump, or use a sandwich plate, or take it from the head. ?

You're right, those threaded ports are rev3+ only AFAIK. They read identically to a sandwich plate on the rev3+ without any potential seal issues.

Earlier turbo engines have the oil filter by the exhaust manifold and some people report that affects their readings, so sandwich plates aren't necessarily great on those engines.

On all the engines you can take temperature from the sump (weld on a boss or use a sump plug with a thread for your sensor) and pressure from the oil gallery as shown previously. As said earlier, I'd suggest the oil gallery is probably a slightly better location for the pressure reading provided you do it right. However I keep mine in the oilpan because I'm used to the readings I get from there (hence meaning I can spot changes, which is ultimately the point of gauges!)

Also, my oil pressure gauge saved my engine 5 times in one year. (There were two dodgy modifications to the oil system, both removed now). Moral of the story... if you're modding any oil pipe, get a pressure gauge in there!

[bishop]

can't agree with shinny more (I did shamelessly use your diagram from a quick google search as its far and away the best to show the Rev3 points) about the braided tee.
I had an older rev2 turbo lump so no spare bosses to use and do to the cramped spacing I used a short braided hose length to relocate the tee to a bracket further down the rocker cover. that way the weight of the sensor is taken on the bracket rather than the fitting. the oil pressure switch doesn't need anything like that as it is much smaller/lighter and threaded directly into its boss.
A kit would make life easier as it will give you the correct thread which, if a I recall, on the rev2 head at least is a slightly unusual 1/8 BSPT. this should not be confused with 1/8 NPT as they are not the same!

[mr2nut123]

Ok, now that I have the merlin 3/8BSP to 1/8NPT adapters, I was thinking.. A braided line relocation kit with dual port would work to get around the problem of aircon belt IF I have it under there surely..? I can't imagine all 3 plugs getting in the way of the belt?

I could then just simply use one 3/8BSP adapter to have the oil temp and oil pressure senders into one, and I can secure them to the engine bay somewhere.

I was thinking of adding this:

http://rspec.co.uk/gauge-sensor-adaptor ... it-1-8-npt

That way it keeps the sender away from the engine to avoid heat and vibration, correct?

[gnzyza]

I don't think reading temps from a remote line is a good idea really.
If there is no room with the a/c in place to use the 3 ports by the filter. Then I would take the pressure reading from the stock location using a remote line with a T for your stock/aftermarket senders.

That 'should' let you use one port by the filter to take temp readings.

[mr2nut123]

I don't think reading temps from a remote line is a good idea really.
If there is no room with the a/c in place to use the 3 ports by the filter. Then I would take the pressure reading from the stock location using a remote line with a T for your stock/aftermarket senders.

That 'should' let you use one port by the filter to take temp readings.

Hang on a minute... I thought using a relocation kit for the sender WAS a good idea as there's no stress on the brass adapter from the engine from the weight of it mounted sideways..?

[gnzyza]

I understood it you said you was going to use a remote line on the sump port and hook up both temp/pressure. I'm sure you cant do this with the temp, as it needs to be in the flow of oil. Could be wrong.

Yes definitely use the remote line if taking pressure reading from the head as previously mentioned

[mr2nut123]

I understood it you said you was going to use a remote line on the sump port and hook up both temp/pressure. I'm sure you cant do this with the temp, as it needs to be in the flow of oil. Could be wrong.

Yes definitely use the remote line if taking pressure reading from the head as previously mentioned

I was actually. The above line has two ports on it, so surely you could add temp and pressure into those? It takes a 1/8NPT port and gives you two ports of the same size. Oil would go down the braided line and come in contact with both temp and pressure senders surely..?

[gnzyza]

Just looked at the link again and your probably right looking at the take off. hopefully someone can clarify. As this is something I may need to do as well.

[mr2nut123]

Anybody..?

[Danbob]

The reason you shouldn't use the braided line type adapter for oil temperature is because it is a dead-end, there isn't any fresh oil flowing over it so you won't get a great temperature reading. It's great for pressure, but for temperature you should have the sensor where it is immersed in oil flow, so in the or around the sump is usually chosen as it is the most convenient

[mr2nut123]

The reason you shouldn't use the braided line type adapter for oil temperature is because it is a dead-end, there isn't any fresh oil flowing over it so you won't get a great temperature reading. It's great for pressure, but for temperature you should have the sensor where it is immersed in oil flow, so in the or around the sump is usually chosen as it is the most convenient

That makes sense actually. Ok, so I'll take my oil pressure from one of the 3 sump plugs then, but where should I take my oil temp from? Will it be the same 3/8BSP to 1/8NPT adapter, or will I need another type for oil temp? Any photos would be great