What is offset betwen TDC and missing tooth

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Topic: What is offset betwen TDC and missing tooth (Read 2003 times)

BlackT

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	What is offset betwen TDC and missing tooth « on: January 29, 2025, 12:06:13 PM »

I am curios about what is offset when first piston is on TDC and how much tooth is shere missing tooth is on crankshaft sensor? For 4 6 and 8 cil ME7


« Last Edit: February 20, 2025, 10:27:19 PM by BlackT »	Logged

terok

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	Re: What is offset betwen GMT and missing tooth « Reply #1 on: February 19, 2025, 01:49:23 PM »

Search A2L files for SY_GRDWRT or SY_GRUNDWERT and you will find numbers that are quite close, depending on how you want to count.


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BlackT

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	Re: What is offset betwen GMT and missing tooth « Reply #2 on: February 20, 2025, 03:59:36 AM »

Thank you very much Grin

looking at FR that is variable
KAMFZ:
Motor: KAMFZ (Grad KW vor OT)
4-Zyl. 126
6-Zyl. 96
8-Zyl. 54

So 126/6= 21 tooth for 4 zyl and 5 zyl

16 tooth for 6 zyl and so on


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Speedhunter

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	Re: What is offset betwen GMT and missing tooth « Reply #3 on: February 20, 2025, 08:04:14 AM »

Wtf GMT means?....

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BlackT

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	Re: What is offset betwen GMT and missing tooth « Reply #4 on: February 20, 2025, 10:26:41 PM »

Quote from: Speedhunter on February 20, 2025, 08:04:14 AM

Wtf GMT means?....

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Sorry it is on my language TDC or on german OT, I will fix this, thank you for hint


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IamwhoIam

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	Re: What is offset betwen TDC and missing tooth « Reply #5 on: February 21, 2025, 01:11:45 AM »

Quote from: Speedhunter on February 20, 2025, 08:04:14 AM

Wtf GMT means?....

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I thought it was Greenwich Mean Time


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Speedhunter

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	Re: What is offset betwen TDC and missing tooth « Reply #6 on: February 21, 2025, 01:55:06 AM »

Gornja mrtva tocka

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BlackT

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	Re: What is offset betwen GMT and missing tooth « Reply #7 on: February 22, 2025, 02:14:34 PM »

Quote from: BlackT on February 20, 2025, 03:59:36 AM

Thank you very much Grin

looking at FR that is variable
KAMFZ:
Motor: KAMFZ (Grad KW vor OT)
4-Zyl. 126
6-Zyl. 96
8-Zyl. 54

So 126/6= 21 tooth for 4 zyl and 5 zyl

16 tooth for 6 zyl and so on

This is not correct, 1.8T have 15 or 16 tooth between sensor and missing tooth when piston is in TDC


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terok

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	Re: What is offset betwen TDC and missing tooth « Reply #8 on: February 23, 2025, 03:52:46 AM »

KAMFZ is beginning of measuring window of misfire detection, so no it's not correct.
SY_GRUNDWERT=72 degrees from TDC to SW-bezugsmarke, plus 1 tooth to the edge of missing teeth.
For example, if you have aftermarket ecu, you put 78 deg as TDC offset, timing should be spot on (depending what your ecu uses as ref point).


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