Does somebody know the averaged EGT-differences between the four cylinders?
Maybe personal experiences with four EGT-gauges?

It would be nice to know the temperature differenc from the hottest to the coldest cylinder.

 

that's a good question.

I just bought a pyrometer, and I would imagine that the leanest hole (the one that gets the best airflow in) would be the hottest.

I would like to hear from someone experienced with seperate pyrometers.....I would like to put my probe in the hottest hole. (lol at that last sentence)

 

Just do it on a fresh motor, nobody likes sloppy seconds

Usually its cyl 2 & 3 that run hotter, since they get less cooling. I would imaging that #3 is the hottest, because the coolant has to pass by 1 & 2 before cooling #3.

 

But this would mean that 4 is the hottest one because it gets coolant as last.

I wanted to lead the question more in directon WHY and HOW MUCH the four cylinders´ egt differ.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">Using a pair of EGT gauges, I've been monitoring comparisons of EGT's b/w cylinders. Cylinder #3 was used as the standard since that's the one that everybody says runs the hottest. Guess what? They're right.

Relative readings:
1: -40 deg Celsius
2: -20 deg Celsius
3: 0
4: -40 deg Celsius</TD></TR></TABLE>

 

3 is the hottest because its the only cylinder that is either firing or has an adjacent cyl firing (except #1 tdc)

 

thanks for the replies...it will go on #3

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blackeg &raquo;</TD></TR><TR><TD CLASS="quote">3 is the hottest because its the only cylinder that is either firing or has an adjacent cyl firing (except #1 tdc)</TD></TR></TABLE>

isnt that the same as #2 cyl?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xenocron &raquo;</TD></TR><TR><TD CLASS="quote">

isnt that the same as #2 cyl?</TD></TR></TABLE>

Thats what I thinking...

 

I've always heard that #3 was the way to go if you were looking for a good point for your EGT probe.

I actually tapped into the internal wastegate hole in my turbo to put the probe in. I was running an external WG, so the exhaust flange I had was actually designed to block off the hole for the internal WG. drilled, and tapped a hole in there. Measured EGT temp right after it came out of the turbine.