Ive spoken to Mike Rainbird about this and in the case of the cossie its a piece of p***.

However where does the sender go on the Scooby. Is anywhere in the downpipe OK, or does it need to be near the turbo?

Cheers

Richie

I've been told it should be in the downpipe.
But mines in the manifold!

Whats involved Bajie. Just drill and tap??

Where did you get the sensor??

Where exactly in the manifold and where in the downpipe would be best (near turbo??)

Many Thanks

Richie

My EGT was fitted by TDI after I bought an HKS Super Drager system.
Unfortunately I did not buy the downpipe at this time so they put the sensor in the manifold.
I have been told the best place for the EGT sensor is in the downpipe after the turbo as it is more isolated from heat.

The best place is in the headers (where it sounds like yours is Ian).

It will require more careful cleaning up procedure if you fit it in the headers, it will give different readings in the downpipe but will still be useable.

Does it matter where in the Downpipe Mike, cos as low as pos would be easier to fit.

Any idea about what sensor I need??

Richie

When i had my exhaust changed from standard Sti 3 to 3"stainless steel,de-cat,twin dump downpipe by SAS in aldershot they did not fit the heat sensor.There was no tapping for it on the new downpipe,and i was told it was not neccesary!BTW existing cat in the downpipe was revealed to be rattling like a b***ard and before and after dyno runs were263.5BHP and 297.5 BHP.Only problem with new system is the that the steering column UJ hits the smaller downpipe on hard left handers,SAS have agreed to try and rectify this.Oh one other thing, having done the LTR meeting at oulton park last friday and run perfectly the engine has started misfiring today?see misfiring Sti in engine section.

Ideally,

You should fit a temp sensor by each cylinder...

But only R19kets of this world attempt that http://bbs.scoobynet.co.uk/wink.gif

The next best is in the up-pipe before the turbo (in the header). Thats where I have mine... but does require the turbo comming out, etc...

The next place (last place) is after the turbo in the down pipe... this will give a lower reading.. but you will learn to mentally compensate for it....

It should be as close to the turbo as possible... to minimise any temp drops.

J.

ps - The sensor you are talking about (removed by SAS) isnt an EGT probe (as these guys are talkign about).. its a CAT temp sensor.. to ensure the cat is upto temp and working right. It can be disconnected without any affect at all... most UK/OZ systems dont have provision for this.. Jap exhaust systems tend to.

J,

from my point of view, the best place for EGT probe is just before or in the turbo, since I will use it for ALS reduction stragetgy enable (stop the ALS cooking the turbo!). I have therefore fitted my EGT probe to the exhaust gas inlet on the turbo, it it measures the temperature of the gas going into the turbo (and hence the max temp the turbo could get up to) :-)

I may, if I get time, fit an EGT probe to each cylinder so I can see if I need to alter fueling / timing on a per cylinder basis, but considering I'm only pulling 0.4 bar at the mo it's not really relevant yet :-) I think I may have to go for inconel type sensors since Mark keeps burning the ends off his header temp sensors! :-)

Cheers,

Pat.

Pat,

Lowering your standards ? http://bbs.scoobynet.co.uk/wink.gif

Why go for iconel ? Go for optical sensing.. like in F1...etc...

J.

I think I'm going to buy shares in "K" sensors !!!!!!!.

IMHO, it gets too hot, close to the heads, to give any consistant readings from the "normally" available sensors. They either fail completely, or give spurious readings (like 947 deg'.......at idle !!).

I'd go with Pat/J on this one. Just before the turbo would be very good, inside, even better, but a pain to do.

From a practical point of view, in the down pipe is the easiest. It is also the most reliable, in terms of sensor longevity, and consistancy. You need to add about 150deg', to get the "before" the turbo temp.

Mark.

Where can I get a sensor ??

Any ideas??

Cheers

Richie

Richie,

Dont you want a gauge as well ?

Most EGT gauges use K type thermocouple probes...

SPA, Autometer, HKS, etc..

The design/quality of the sensors vary... I run an original HKS sensor which has lasted.. plus industrial stainless steel sensors. These industrial sensors are about 10 pounds each.. but dont tend to last (ask Mark) http://bbs.scoobynet.co.uk/wink.gif

So I'd suggest by a proper EGT gauge with its own supplied sensor (will last longer)

J.

Im going for the Autometer range, so do I assume it comes with a probe??

Cheers Firefox

Rich