Downpipe EGT hole thread

[Doug_RS2]

What is the diameter and thread pitch of the blanking plug that the EGT probes get connected to?

I am building my own EGT monitor and just need to make sure I am getting the correct adapters.

Following this brilliant link:

http://www.autospeed.com/cms/article.html?&A=0376

It looks real neat.

I think it will come in at £80 max.

I am also going to have an alarm that will set off an audible alarm when the EGTs go above a temperature - I will make it so I can set that temp up on the display.

I can't remember what the temp Mihnea started shouting at us when the EGT got too high - was it 800 or 850 degrees C?

I was tempted to have 5 probes to measure each cylinder but I have read several places not recommending this on turbo cars in case the probe goes through the turbo (Greg!!)

[S2 Ant]

Looks very nice and neat too

[Mihnea]

850°C is the post-turbine temp that should not be exceeded under WOT conditions.

If before the turbine, use 950 as a maximum...

I can get you a display like mine (not with the box, only the display itself) backlit in blue, red, amber and green with the thermocouple (display calibrated for that particular thermocouple, max. 2% tolarance between 600 and 1100°C).

The thermocouple comes with a stainless fitting BTW.

[Corey]

How much?

[Doug_RS2]

I reckon this would cost me £18 for probe, £10 for compression fitting, £5 for the adapter to make it fit, £45 for the display and all the electronics can be had free.

But if you can get it for a good price Mihnea, it would save me time - how much?

[SteveH]

Doug, Thanks for the link to the EGT info

I'm definitely going to build one of these. Have you looked for a supplier of the IC? I'd think Maplins or RS would be able to get these. I'll have a look on their sites today.

[Doug_RS2]

Steve,

If you want free ICs go to the manufacturers webpage - the AD595AQ is made by Analog Devices, www.analog-devices.com Find the part and request a couple of free samples. You can do this for the voltage regulator as well - try www.national.com for regulators - these have to have a heatsink as they are dropping a big voltage across them.

Farnell - www.farnell.co.uk does the thermocouple and compression fitting. I'm looking at the labfacility ones. 3mm 150mm long, isolated.

I have asked for a quote for an adapter for the M12 hole in our downpipe from Think Automotive. I think I asked for a male M12 to female 1/4" BSPP steel adapter

THe display is £59 from the US - I will have a search for a cheaper or UK source of this later tonight

Mihnea might come back cheaper anyway.

Doug

[Wizard-of-OD]

Doug
is it possible for me to just buy this gauge off the market?Or have one of the guys build one and i just buy it?

[Doug_RS2]

Originally posted by Wizard-of-OD
is it possible for me to just buy this gauge off the market?Or have one of the guys build one and i just buy it?

I've not found anywhere you can buy this actual kit.

I think Mihnea has something that is very close but still waiting on prices - MIHNEA ????

[SteveH]

Doug,

I was too busy yesterday to take a look at RS and Maplins. I'll follow the links you posted

cheers m8

[Mihnea]

Hey guys, sorry for the silence, been doing some late-night mapping yesterday (no, Lee wasn't in Belgium ) with a TT


Ok, so the full kit is 140 Euros including shipping, otherwise the probe alone is 65 Euros. The probe includes the compression gland and each display is calibrated separately to its own probe for more accuracy.

Keep me posted guys


Cheers,


Mihnea, off to remap an S3 soon

[Wizard-of-OD]

hey Mihnea
whats up?
So this will take the place of the empty slot i have above my dvd deck?The probe will be from autometer?
Please list what will be coming in the kit,as it is i have no more room for gauges

[Doug_RS2]

Here's the thermocouple probe, compression gland and adapter.

I'm going to mount the display - the red 3.5 digit KNS - in a small black box and sit it on my dash - I want in very visible, but can also remove for using elsewhere.

I have a couple of the AD595 thermocouple ICs and should have another couple next week if anyone wants one?

Just waiting on my display. I went for the one autospeed used (in red instead of amber) as it was the only one I could find with a +-20V input range - you can get a basic display for £20 but need to attenuate the output of the AD595.

[SteveH]

Doug,

I'll buy anything that's spare during your project I'm going to build something similar in the next few weeks. It's just finding the time with decorating etc. Could you PM me your number again and I'll give you a call.

cheers,
Steve

[Wizard-of-OD]

Doug when its done and i like,would you be able to offer them as a kit of some sort to the guys?