Thread: Does ceramic coating increase EGT reading?

Originally Posted by sierrafery

What i can say is that after fitting the turbo blanket the IAT was not higher at all only the boost rose faster so as long as the OP has a turbo blanket IMO the effect of the hotter turbine on the boosted air is completely neglectable.

Originally Posted by PhilipA

Just a few more impressions.

The tip in and turbo lag are much better with the mods.

I don't know about absolute power as haven't done that yet ,as was a bit alarmed by the 700C.

It is obvious that the ceramic manifold has made quite a difference as I can also hear the turbo spooling which I couldn't before.

Oh and I think I have noticed that warm up seems slower without the EGR.

Next mods could be maybe a decat pipe and flowmaster muffler.
Regards Philip A

Thats all about what happens when you make the turbine more efficient by making sure hotter gasses reach it.

the other side is not only is the exhaust manifold not loosing as much heat, when you're off the noise its keeping warmer as well.

the reason that deleting the EGR slows down the warm up is because the air fuel ratio remains leaner. Diesels run cooler when there is excess air to the fuel available and run hot when you run more fuel than you hae air to burn.

by not displacing normal air with exhaust gasses there is more free O2 to limit the overall combustion temperature. However there is also more Nitrogen to produce more oxides of nitrogen.

The IAT in a TD5 wont show any change in temperature from anything you do with the turbo (excepting that when you do enough you raise the whole engine bay temp including the air in the airfilter) as the IAT sensor is pre turbo and is used in conjunction with the MAF (pre turbo) to work with the MAP (post turbo)so the total air going into the engine is known.

Originally Posted by Blknight.aus

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The IAT in a TD5 wont show any change in temperature from anything you do with the turbo (excepting that when you do enough you raise the whole engine bay temp including the air in the airfilter) as the IAT sensor is pre turbo and is used in conjunction with the MAF (pre turbo) to work with the MAP (post turbo)so the total air going into the engine is known.

Re-think that please.... the IAT on a Td5 is together with the MAP on the inlet manifold, we call it simply MAP but in reality is 2 in 1 MAP/IAT....so it would have sensed hotter boost if it was the case that's why i mentioned it ...what you said is valid for Td4 and and 6 not 5

depends on which one you mean.....

td5's have 2 one in the air box as part of the AAP and one in the manifold as part of the MAP.

The one in the manifold works the total air volume going into the pots including the EGR gasses

the one up the front handles the total fresh air mass.

Which one are you reading from?

I was speaking about IAT(inlet air temp) exactly as it's named which is only one in MAP/IAT and all td5's have it, the AAT(ambient air temp) which is present only on Eu3 modells not on all td5s is part of AAP in the airbox and it has nothing to do with this discussion about boost temperature cos it's not even part of the addaptive strategy and used mostly as fine tuning for EGR controll

Oops, once it is hot it is going into a big miss under acceleration.

I assume it is boost cut, so I will wind back the wastegate a turn.

Turbo is now too efficient for its own good.LOL

Regards Philip A

OK I turned back the wastegate about 1MM and the boost cut is now not so evident.

I was wondering what was up as the Boost gauge was reading "10" plus a bit. I thought it cannot be only 10PSI.

Then I squinted and read the face and it reads "In Hg". So the boost is 14.7 +4.96 =19.66 PSI or just about up on boost cut still once the turbo is hot.

You wouldn't think the blanket and ceramic manifold would make such a difference but it seems to.
I will take another bit off the rod.
Regards Philip A

I had another look at the gauge and it says PSI on the boost side but In Hg on the vacuum side. The scale seems to be about right for PSI Vs vacuum in Hg but I cannot understand why it only shows "8" now. If that were PSI then I would have 14.7 +8 or 23 which cannot be right. It seems more likely to be 14.7 +about 4PSI =18PSI.
It cannot be 8PSI boost only as the car goes really well.
A mystery.

it's too hard for me to make each conversion from psi to HPa or bar...please tell me what's the MAP(manifold pressure) reading in inputs fuelling menu of nanocom(not instrument mode)