Chips

EGT = Engine Gas Temperature (temp of the exhaust gas exiting the motor and then entering the turbo)

If it gets to hot it will cook the turbo, warp the head, melt pistons and cost big big $$$$$$.

The primary culprit is over fuelling, along with labouring the engine when using big throttle openings. A good indicator is black smoke.

If you just "chip", it only changes fuel injector flow rates and opening duration, basically it just tips more fuel in. So EGT's will go through the roof.

If you do a BAS remap the whole engine management programme is changed to produce extra power, not just adding more fuel.

I don't think there is an easy way to fit an EGT gauge to the TDCi either,another reason to avoid cheap performance chips. Pat

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Originally Posted by PAT303

I don't think there is an easy way to fit an EGT gauge to the TDCi either,another reason to avoid cheap performance chips. Pat

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Madman EMS mount directly into the turbine exhaust (post turbo)...

See here: http://www.landyonlineretail.co.za/w...'showall=1

Scroll down!

Quote:

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Originally Posted by Tombie

Madman EMS mount directly into the turbine exhaust (post turbo)...

See here: EMS Installation Basics

Scroll down!

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Tombie,

How much impact does having the probe on the exhaust side of turbo have on temp readings ?

Is it preferable to have it between the head and turbo ?

Cheers

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Originally Posted by Drover

Tombie,

How much impact does having the probe on the exhaust side of turbo have on temp readings ?

Is it preferable to have it between the head and turbo ?

Cheers

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Turbo acts as a thermal sink, reducing 'true' temperature readings by a significant (~200c?) and varying amount making readings indicative.

Probe pre turbo gives more accurate/reliable readings.

I have a Madman with EGT (pre turbo) and drive to it.

I've read the difference between pre and post turbo readings is about 100 degrees, that is 100 degrees lost for a post turbo, the further down the dump pipe you go the more heat you lose. Also depends on how quick your gauge reacts.
Pre turbo is by far more accurate, but there's nothing wrong with post turbo, just be aware of what the numbers on the gauge equate to in terms of real world engine temp and drive accordingly :)

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Originally Posted by Disco Muppet

I've read the difference between pre and post turbo readings is about 100 degrees, that is 100 degrees lost for a post turbo, the further down the dump pipe you go the more heat you lose. Also depends on how quick your gauge reacts.
Pre turbo is by far more accurate, but there's nothing wrong with post turbo, just be aware of what the numbers on the gauge equate to in terms of real world engine temp and drive accordingly :)

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Yeah, but that's the issue, the loss could be 100 degrees at certain times, or 50, or 200, so you never really know how close to the edge you might be. On that basis you probably need to derate by the worst case value at any time if you want to be sure you're safe.

That said, plenty of people run post turbo gauges, but then again what are the numbers on how many turbos get cooked that way - the data is unavailable.

Either way, it's better than nothing as long as you understand the limitations - however, if you take it as read it has the potential to be worse than not having one.

n p o - did you need to take to turbo off to drill and tap the hole for sensor ?

Is there a safe option with out removing the turbo?

May be a vacuum running while drilling or a magnet ?

Would a few fine metal filling being sent through the turbo have the potential to cause harm ?

Quote:

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Originally Posted by Drover

n p o - did you need to take to turbo off to drill and tap the hole for sensor ?

Is there a safe option with out removing the turbo?

May be a vacuum running while drilling or a magnet ?

Would a few fine metal filling being sent through the turbo have the potential to cause harm ?

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Most do it in situ - engine running is a popular option too. I had mine done during a service (needed an odd tap that I didn't have) - can't remember how they did it in the end, but they had successfully done many without issue (for what that's worth).

Can apply grease or something similar to the drill bit to catch the filings :)