measuring EGT

[urS6Tom]

I recently had 3" turbo back exhaust fitted and they added an extra bung after the one for the lambda probe.

Can I use this location to measure EGT, or is it meant for something else?

cheers,
Tom

[Jamo]

That looks the same size as the lambda hole and looks more for Wideband probe IMO

[Jonas_R]

You could move the lambda to the other hole assuming what Jamo says about the sizing is correct. Then you could just use an adaptor and fit the EGT where the lambda is now.

I think you should add 100 celcius from the values you are reading, when the egt probe is located just after the turbo.

[urS6Tom]

You could move the lambda to the other hole assuming what Jamo says about the sizing is correct. Then you could just use an adaptor and fit the EGT where the lambda is now.

I think you should add 100 celcius from the values you are reading, when the egt probe is located just after the turbo.

Sounds like a plan Presumably moving lambda further away won't be a problem?

Anyone know the standard size of a lambda probe thread? My EGT probe is 1/8 NPT, so need to get the right male/female thread adapater...

[GazzaG60]

its for sure a probe boss.

the debate over temps

100 c seems a lot to lose in a short space. ive not measured the difference. has anybody? id expect with a good manifold and a big hotside that number be less?

thoughts

[urS6Tom]

According to http://www.s2forum.com/forum/showthread.php?t=27764 the standard probe is M18x1.5.

Anyone recommend the best place to quickly get a M18x1.5 to 1/8 NPT thread adapater from?

Cheers

[GazzaG60]

i have 2 probes at home. one is a vems the other defi. most seem to have the same boss.

[urS6Tom]

I've found the correct adapter bushing, but it's made from brass. Is that going to melt?

[Jamo]

Brass Melting point 900-940 Celsius, hmmmmmm I dunno bit close for comfort!

[GazzaG60]

FI usually are not brass. also brass is soft and can snap easily

[Jonas_R]

I was looking for the same thing when I installed my EGT probe. I ended up using the bung that came with the EGT probe. My welding bung was Ø16 (i think) and had 1/8" NPT thread.

I just welded the bung in the lambda probe bung, works a charme.

[hoffer76]

I went to a local hose and pipe specialist with an egt probe and lambda( fitment hole on downpipe the same size as lambda) £10 later had all correct parts for a sealed fit.

http://www.hyphose.com/

[Jamo]

I went to a local hose and pipe specialist with an egt probe and lambda( fitment hole on downpipe the same size as lambda) £10 later had all correct parts for a sealed fit.

http://www.hyphose.com/

NIce solution!

Is that an OEM downpipe? if so there is a tap for the EGT on the flange just remove the nut and you can fit the EGT there

[urS6Tom]

Cheers for the http://www.hyphose.com/products.html link!

[AndyP]

Unfortunately I don't have any welding equipment. Can't believe I can't find a steel adapter bushing. My googling skills obviously aren't up to scratch

Buy a lambda blanking plug and drill and tap it for the EGT probe, 1/8" NPT I think.