Timing settings...? - Victory Forums - Victory Motorcycle Forum
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post #1 of 49 (permalink) Old 10-25-2017, 07:15 AM Thread Starter
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Default Timing settings...?

My XC does not like timing advance. Adding advance had minimal effect on the power curve, all it noticeably did was cause the engine to run extremely hot and rough. Since installing cams I've been running the ATS at +3 with no further increases on the PC-V. I'm going to shortly take that advance out....for pretty much the reasons I just stated.

The questions I have is: What effect does retarding the timing into the (-) negative generally have? and What is (-) retarded timing generally used for?

thanks
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post #2 of 49 (permalink) Old 10-25-2017, 08:58 AM
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My XC does not like timing advance. Adding advance had minimal effect on the power curve, all it noticeably did was cause the engine to run extremely hot and rough. Since installing cams I've been running the ATS at +3 with no further increases on the PC-V. I'm going to shortly take that advance out....for pretty much the reasons I just stated.

The questions I have is: What effect does retarding the timing into the (-) negative generally have? and What is (-) retarded timing generally used for?

thanks
Will let one with better knowledge answer the retard timing answer .. Just speaking for myself Advancing +4 with VM1 Cams on my 2012 XC woke it up quite nicely, ran better under all conditions ..

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post #3 of 49 (permalink) Old 10-25-2017, 09:27 AM Thread Starter
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Just speaking for myself Advancing +4 with VM1 Cams on my 2012 XC woke it up quite nicely, ran better under all conditions ..
Mine has never liked advance, going to +4 puts in the engine in nuclear meltdown.... even at +3 with the close-outs in for this cooler weather I can feel excess heat on my legs(which is why I'm going to retard it a few more degrees later today)+ the bike just seems to run more smoothly without the advance.

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post #4 of 49 (permalink) Old 10-25-2017, 09:51 AM
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Every engine has it's optimum for the conditions it's being used for. Retarding it too far will reduce the power (think Jake Brake) and over time will damage your exhaust.

I'd suggest that if you're after specific advice on what's prime then you need to stick to asking the people who have the same model and year of bike with the same cams you have.

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Last edited by 53canuck; 10-25-2017 at 10:26 AM.
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post #5 of 49 (permalink) Old 10-25-2017, 11:27 AM
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write Rylan and ask him about retarding and why so much heat.

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post #6 of 49 (permalink) Old 10-25-2017, 02:07 PM
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Too much advance uses up all the fuel before it's optimal and the temperature rises in the closed cylinder head. Fuel left in the mixture so the burn is more efficient in the timing cycle will help keep it cooler.

Retarding too much can allow burning fuel to exit the cylinders too soon and as it keeps burning during the exit the situation can lead to damaged valves and burned out headers.

Check a book or the internet for some basic info and you can take it as far as you want.

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post #7 of 49 (permalink) Old 10-25-2017, 03:39 PM Thread Starter
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I think I'll just go back to +1

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post #8 of 49 (permalink) Old 10-25-2017, 09:03 PM
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I think I'll just go back to +1
I use +1 on the wheel and the rest is done through the PC5. No need to go crazy on it.
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post #9 of 49 (permalink) Old 10-26-2017, 02:41 AM
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Fred Procycle dyno took eleven degrees out of my Vegas when he tuned it.
First took a shitload of fuel out of it with good results, then tried adding timing and found it wasnt responding to that.
Then he tried taking timing out and with eleven degrees out of it he gained ten horsepower.
ATS is still set at plus 4
He took timing out with the PCV.
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post #10 of 49 (permalink) Old 10-26-2017, 11:20 AM
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@Motorbikerx 11 back and 4 forward at the best means at times you're running at minus 7 from where a lot of testing/experience has shown to be close to optimum for these bikes on average. That's huge. Not saying it's wrong but with that much of a difference I'd be suspecting the cams/chain not being properly aligned. I'm no mechanic but hey, if it runs it runs and you certainly like it.
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Last edited by 53canuck; 10-26-2017 at 11:24 AM.
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