M275 V12 Bi-Turbo Platform Technical discussion relating to models sharing the M275 V12 Bi-Turbo (V12 TT). Including SL600, SL65 AMG, CL600, CL65 AMG, S600, S65 AMG.
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Engine Timing

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Old 01-28-2019, 11:09 PM
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Buick T-Type, 70 cuda, S65 and a very FAST Truck!
Engine Timing

What is everyone here seeing for ignition timing during a full pull on a stock, 93 or 100 octane tune? Mine seems to vary quite a bit based on intake air temps. Do the V12TT cars have the same three stage timing reduction based on IAT like the E55s do? On high gear pulls I am seeing -10 to -12 degrees.

The 55K motors when Intake air temps get to the following temp they pull x amount of timing.
at 35C (95 F) pull 3.5 degrees of timing
at 45C (113F) pull 6.3 degrees of timing
at 65C (149F) pull 9.5 degrees of timing

Thank you,
Old 05-15-2019, 03:42 AM
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sl600
this is awkward my intake temps usually in the 70c + after engine warmup (10mins)

I'm working to make a perfect intercooler setup
Old 07-29-2019, 02:02 PM
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W221 S600, W220 S55 AMG Kompressor, W124 300E, W140 S320, W210 E3204M W164 ML320 Bluetec
Originally Posted by Flight Test

What is everyone here seeing for ignition timing during a full pull on a stock, 93 or 100 octane tune? Mine seems to vary quite a bit based on intake air temps. Do the V12TT cars have the same three stage timing reduction based on IAT like the E55s do? On high gear pulls I am seeing -10 to -12 degrees.

The 55K motors when Intake air temps get to the following temp they pull x amount of timing.
at 35C (95 F) pull 3.5 degrees of timing
at 45C (113F) pull 6.3 degrees of timing
at 65C (149F) pull 9.5 degrees of timing

Thank you,
It is interesting trend that many M275 owners (and AMG owners in general) have an odd, 1980's V6 powered Buick in their garage. Most seem to be black, others are found in different colors.

One has 12 cylinders, one has 6. One has two turbos, the other has one.

Odd, isn't it?


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