NefMoto > Technical > Tuning > MED9.1 High EGT after changing turbo
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Author Topic: MED9.1 High EGT after changing turbo  (Read 11447 times)
gman86
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« Reply #15 on: April 30, 2018, 04:58:49 PM »
Log 091 and see what the cam is up to
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Khendal
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« Reply #16 on: May 01, 2018, 04:42:09 AM »
Quote from: gman86 on April 30, 2018, 04:58:49 PM
Log 091 and see what the cam is up to
For what? What are you thinking ?
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gman86
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« Reply #17 on: May 01, 2018, 02:04:37 PM »
Quote from: Khendal on May 01, 2018, 04:42:09 AM
For what? What are you thinking ?

Overlap can induce higher EGTs.
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Bitshifter
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« Reply #18 on: May 02, 2018, 11:40:26 PM »
How do you measure EGT? Dit you install a K-Type and loop it in the ECU or is your group 230 only the a produkt of KFATMKRH?
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mbkr89
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« Reply #19 on: May 08, 2018, 01:38:30 AM »
How you run 170 bar rail pressure ?
Is it ea888 engine ?
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Khendal
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« Reply #20 on: May 08, 2018, 03:14:27 PM »
Quote from: gman86 on May 01, 2018, 02:04:37 PM
Overlap can induce higher EGTs.

But the problem happened only after have changed turbo...from 3071 to 3076  Undecided
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Khendal
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« Reply #21 on: May 08, 2018, 03:22:55 PM »
Quote from: Bitshifter on May 02, 2018, 11:40:26 PM
How do you measure EGT? Dit you install a K-Type and loop it in the ECU or is your group 230 only the a produkt of KFATMKRH?

K-type probe  Wink
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TijnCU
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flying brick
« Reply #22 on: May 08, 2018, 04:14:55 PM »
Quote from: Khendal on April 29, 2018, 03:25:49 AM
All exhaust system is 76mm at the moment... he will upgrage to 80mm or 90mm asap.
They are not talking about your exhaust, but about the restriction of the turbine. What is the size of the turbine housing?
You are trying to cram more air through the same hole as before with this larger turbo, and as you may know higher pressure = higher temperature. The tips to combat EGT are usefull like more efficient ignition angle and extra fuel for cooling, but there is logic to the cause too.
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prj
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« Reply #23 on: May 09, 2018, 02:18:25 AM »
Even worse - because the compressor wheel is now larger, the CHRA spins slower to produce a certain amount of boost.
That also means that turbine flow is less for a given boost pressure - this increases exhaust pressure even more.

If you have a 0.63 housing you need to go to a 0.82.
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