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The mkiv Supra Owners Club

Help! Where is the best place to mount a EGT sensor, and how do you fit it?


Kevin Huntley

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As close to the block as possible...in the exhaust manifold.

 

The no. 6 piston (furthest towards the back) usually runs the hottest.

 

I would place it right by piston 6 or right in the merge point for all 6.

 

CW is quite handy at fitting them....he can at least tell you what tools to use.

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i had mine fitted by cw. i considered doing it myself until i had a right good look at the job. unless yr really very handy and know what yr doing it will b a complete twat to do in a place that will give meaningfull results, lots of things can go wrong, very wrong. id get cw to do it.

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Hi guys, thanks for the advise. I would love CW to do the job for me but it is a 500 mile round trip for me to get there and back so its just not feesible to fit the probe.

 

I was going to get one of the lads who works in the machine shop where I work to drill and tap the exhaust manifold and then take it to local auto electritian to fit the gauges.

 

Can anyone give me an idea of where abouts on the exhaust manifold I need to drill the hole. I know there are 6 cylinders but I have no idea how to distiguish one from another, any clues?

 

Whats the best way to get to the exhaust manifold? and what do you have to remove to get access to it?

 

Thanks

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Originally posted by Kevin Huntley

Hi guys, thanks for the advise. I would love CW to do the job for me but it is a 500 mile round trip for me to get there and back so its just not feesible to fit the probe.

 

I was going to get one of the lads who works in the machine shop where I work to drill and tap the exhaust manifold and then take it to local auto electritian to fit the gauges.

 

Can anyone give me an idea of where abouts on the exhaust manifold I need to drill the hole. I know there are 6 cylinders but I have no idea how to distiguish one from another, any clues?

 

Whats the best way to get to the exhaust manifold? and what do you have to remove to get access to it?

 

Thanks

 

CW has a way of stopping all the swarf from the drilling and tapping dropping into the manifold and then being ingested by the turbos. You should be very confident that whomever is doing the job knows exactly what they are doing.

 

This is one of the reasons that many probes end up in the downpipe (which is pretty useless by all accounts)

 

Best of luck.

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Originally posted by Terminator

EGT= Exhaust Gas Temperature, essential when you start lifting boost levels

 

Hmmm...I'm going to disagree with you there. If your just going to raise the boost to 17psi, a pretty safe bet all in all, I don't think it is really necessary.

 

If your going to max out your car then I would say yes.

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michel, it measures the temp of the burnt gasses coming out of the cylinders. its a good safety measure. there r temps u dont want to see. it can show up lean conditions (not very accurately) and detonation (again not very accurately). i think they r very useful if yr starting to mod an engine.

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can post a pic if you want where CW fitted mine

all car is in bits at this moment.

i had my EGT probe fitted by dragon autosports and the fitted it in wrong place. they put it in downpipe next to turbos, have since had it fit in correct place.

 

let me know if you want a pic uploading

 

its peace of mind knowing what temps you are hitting. i would say boost and egt are your main 2 gauges

 

have fun

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Originally posted by GavinL

Hmmm...I'm going to disagree with you there. If your just going to raise the boost to 17psi, a pretty safe bet all in all, I don't think it is really necessary.

 

If your going to max out your car then I would say yes.

 

I agree Gavin, but my boost does go higher than 18psi at times, for short bursts, so the EGT helps keep and eye on temps just outside the cylinder. The warning function is most useful. It is just another peace of mind bit of kit AFAIAC.

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Hi, Mark please do post so pictures up or send them to [email protected]

 

I am having the gauges fitted on Friday and I would really like to know to mm exactly where to place this thing as I could imagine it could end up costly if I drilled the hole in the wrong place.

 

I have read on Supraforums that you need to crank the engine or let it iddle when you are just about to break through into the manifold to get rid of any swarf, which could damage the turbo's. Is this correct?

 

Thanks

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Originally posted by Kevin Huntley

Hi, Mark please do post so pictures up or send them to [email protected]

 

I am having the gauges fitted on Friday and I would really like to know to mm exactly where to place this thing as I could imagine it could end up costly if I drilled the hole in the wrong place.

 

I have read on Supraforums that you need to crank the engine or let it iddle when you are just about to break through into the manifold to get rid of any swarf, which could damage the turbo's. Is this correct?

 

Thanks

hi kevin just sending your email now.there is about 10 pics in high quality was 600k each re saved them out with no quality loss and they are less than 300k each now.and norton antivirus is checking before it sends.

hope they are of use

come out pretty good.

 

have fun

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I have an EGT guage that doubles up with my SPA boost guage. I have never had the balls to get the brass sensor drilled into me manifold so it is just hanging by my foot well and is acting as a cabin temperature gauge.

 

I hear that it is a delicate operation and can go wrong (like plucking a splinter from ones brain using tweezers through your earhole:) )

 

CW would be my choice to fit but he is miles from me too! Chris can't you do a mobile service :)

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