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i can tell you that timing (at idle) can effect exhaust note.
I have played around with timing a lot on my 77s and even my 930. I could really tell a difference at idle in exhaust note when I would retard the timing.
the tone got deeper with more retard. (factory setting VS unplugging the vac retard).
I would look into timing, if you are nit getting the advance you need or even too much, you will loose response.
you should dyno tune the timing
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Last edited by T77911S; 01-21-2020 at 03:46 AM..
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