Outer Limits 4x4 Board

gday,

i have a GQ diesel, and will be looking at fitting a couple of guages in the future, what i want are guages that are all similar in looks and brand,

so what i need to know,
1 - oil pressure guage, what pressure range will i need, and what is the optimum pressure

2 - EGT, what is max temp that will be needed, how does the senso on these mount?

3 - is boost, ill be right with this one,

all help appreciated,

Shawn

ozy1 wrote:gday,

so what i need to know,
1 - oil pressure guage, what pressure range will i need, and what is the optimum pressure

2 - EGT, what is max temp that will be needed, how does the senso on these mount?

3 - is boost, ill be right with this one,

you can get them all in VDO or Pricol, in 2" with black face and white lettering, and prob in black on white, backlit as well.

oil pressure specification for TD42 is 78kPa (11.5psi) at idle, 294 - 392kPa (43 -57psi) at 3000rpm, and most oil pressure gauges read about zero to 100 psi - so at operating rpm the needle should be in the middle 1/3 of the gauge.

EGT gauge mounts into the exhaust manifold, either in the collector before the turbo, or in the dump pipe immediately after the turbo. pre-turbo temps for a TD42 with aftermarket turbo should be around 700C max, post turbo around 550C max, maybe a little higher on long burns. the sensor is mounted by drilling and tapping the manifold and screwing the sensor in - if you're adding it post turbo, then no disassembly is needed, if pre-turbo, you need to remove the turbo and blow out all the swarf first.

boost gauges come usually in 0-30psi, 0-15 psi, or with a vacuum and positive prssure reading. a vac gauge is useless on a diesel with no throttle butterfly, but these gauges are easier to find and will work fine so there's no reason not to use one except that it will never read any vacuum.

cheers

Brian

thank you, you are the man of knowledge,

will save that and start looking,

Use an electric oil guage with a sensor that screws in on a t piece to where the idiot light sensor is, the mechanical ones that have the thin tube that brings oil to the back of the guage is absolute crap.

i have..
umm amps, vac, water temp, oil pres.. aftermaket gauges

they all work heeps good
the vast majority of aftermarket gauges will work quite nicy with all motors..
like no motor, runs extremly hot, or has huge oil pres from factory

i just have cheep ones
but i would recomend speco!

Philby

I`m running mechanical speco gauges and find them good so far.

I have

water temp (still have standard dash gauge)
oil temp
oil pressour ( still have the idiot light)

Nothing wrong with the mechanical oil pressour if you run the tube correctly. I have run it in a conduit with the oil temp line. The oil doesn`t go all the way up the tube to the gauge it only goes up it so far untill it has pressourised the air that is in the tube near the gauge. If you are worried about the plastic tube breaking or spliting you can get a copper tube instead.

If your using VDO senders, its very difficult to get a sender with the same size thread as the original NIssan type. I had this problem when installing an oil temperature gauge. There are plenty of spare tappings on the same oil gallery that the fact senders are connected to. Cant remember the thread size though..

NIck

I run mechanical Speco OIL & TEMP guages in addition to the std shyte guages

I trust the speco units 100%

The factory electrical guages are like most electrical guages .....
"only just an indicator of whats happening", they do NOT provide an ACCURATE READING.

Kingy

VDO make a Boost guage that only measures boost no Vac. Got quoted $50 from Repco for this model. Was backlit, with white lettering on black BG.
Or you could get a normal boost guage but with fancy colours off Ebay for a similar price.

They also do an EGT kit for a bit over $200. This includes a similar looking guage to the boost one. Measures in degrees C, which is better than most of the others. Kit also comes with the pyro-meter and other bits. Just dont shorten the wire from senssor to guage. As it stuffs up the calibration.

Can find part numbers if you wish.

speco gauges:

http://www.speco.com.au/gauges_am.html

VDO gauges

if u go 4 mechanical guages, try to stay away from copper lines as they work harden and split even with loops put in at either end.