Cylinder selective tuning by EGT

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Just2FasTT
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Cylinder selective tuning by EGT

Postby Just2FasTT » Mon Jul 03, 2017 11:53 pm

Would it be possible to calculate an average EGT from for example 4 values and then calculate the difference from each value to the average?
With this calculated difference it would be possible to enrich each cylinder if it runs hotter and more lean than the others. For me its no option to fit 4 WBO sensors because i havent the hardware and enough space to mount them in the manifold.

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HaltechMatthew
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Re: Cylinder selective tuning by EGT

Postby HaltechMatthew » Tue Jul 04, 2017 2:49 pm

You can map each cylinder over 3D with any channel you like, including each cylinders EGT with all of the Elite range. Even the 550!

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Just2FasTT
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Re: Cylinder selective tuning by EGT

Postby Just2FasTT » Tue Jul 04, 2017 5:56 pm

thats clear to me, but i have not the ability to create such calculated chanels and a EGT average or a EGT error to average.
the given posibilities only alow to tune by for example load and the specific EGT so i have to prdict a EGT that is ok and a value that is too high.

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HaltechMatthew
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Re: Cylinder selective tuning by EGT

Postby HaltechMatthew » Wed Jul 05, 2017 4:11 pm

How do you know the average is OK?

Most tuners don't use EGT for tuning, it is more used for diagnosing a particular cylinder. It is only a guide for tuning, not a hard and fast number that it should be.

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Just2FasTT
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Re: Cylinder selective tuning by EGT

Postby Just2FasTT » Wed Jul 05, 2017 8:04 pm

Ok so you say i should tune each cylinder over load and rpm. doing this once by hand with the single EGT for diagnosing which runs lean or rich

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HaltechMatthew
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Re: Cylinder selective tuning by EGT

Postby HaltechMatthew » Thu Jul 06, 2017 11:15 am

It wont matter so much about load or RPM. More about if that cylinder is getting hot. So Cylinder 1 will be mapped against EGT1, and if you need it you can add RPM or Load. Using EGT is more about preventing a scorched piston than tuning.

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Just2FasTT
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Re: Cylinder selective tuning by EGT

Postby Just2FasTT » Thu Jul 06, 2017 5:27 pm

thats exactly what i got on my last highway run and why i am thinking about cylinder selective tuning :roll:

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HaltechMatthew
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Re: Cylinder selective tuning by EGT

Postby HaltechMatthew » Fri Jul 07, 2017 10:57 am

It is exactly why you map it against each cylinder. Load and RPM dont come into it, the temperature is what will damage things. You can melt a piston cruising, and it is often you can see temperatures drop as you increase load. So simply mapping against the temperature is the simplest and most effective form of control.


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