Author Topic: Unlimited coil for 372xp timing?  (Read 1248 times)

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Offline eriksat1

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Unlimited coil for 372xp timing?
« on: February 08, 2014, 11:35:59 am »
I saw on some video's that the timing advances from low idle to high on some saws that have the rpm limiting coil, and that the non limiting coil has a static timing through all rpm range. Does a oem limiting coil on a 372xp advance timing? Maybe that is why it is hard to hear the 4 stroking when setting high rpm with a limiting coil? I read the non limiting coil 372xp timing was about 23 BTDC
Anyone play around with ignition timing? I realize the only way to change it is modify the crankshaft key. I'm not going to mess around with that. But I am planning on putting on a non limiting coil and now I am curious.

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Offline Cut4fun

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Re: Unlimited coil for 372xp timing?
« Reply #1 on: February 08, 2014, 11:40:16 am »
I no nothing about the timing of coils. But I had no problems hearing the 4 stroking of either saw using unlimited and limited coils when I tune them both.
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Offline eriksat1

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Re: Unlimited coil for 372xp timing?
« Reply #2 on: February 08, 2014, 11:45:48 am »
Tuning out of wood is very hard to hear with limiting coil. Now my old 350 with unlimited coil is easy to hear like night and day.
Here is the video I was talking about.

http://www.youtube.com/watch?v=SDrmLhi4isA&list=FLXua3ha1X74GEi89wHhWYPw&index=1

Offline Cut4fun

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Re: Unlimited coil for 372xp timing?
« Reply #3 on: February 08, 2014, 11:53:18 am »
Not for me. I had no problem hearing 4 stroking on unlimited coils on the 365 372 and the dolmar 7900.  Tuning out of the wood to 4 stroking and to where it cleaned up in the cut.  ;)
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Offline Cut4fun

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Re: Unlimited coil for 372xp timing?
« Reply #4 on: February 08, 2014, 11:56:55 am »
video is Mitch, mweba his username here.
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Offline eriksat1

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Re: Unlimited coil for 372xp timing?
« Reply #5 on: February 08, 2014, 12:38:55 pm »
Cool, nice video. I am going to do a before and after check of timing on mine since I am putting on a after market non limiting coil.

Offline Magnus

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Re: Unlimited coil for 372xp timing?
« Reply #6 on: February 08, 2014, 12:50:04 pm »
It can be hard to hear the difference in a four stroke sound and when it hits limiter.
Usually it is same sound in different tones.


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Offline Cut4fun

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Re: Unlimited coil for 372xp timing?
« Reply #7 on: February 08, 2014, 01:07:17 pm »
If guys are tuning for max rpm and hitting the limiter they are not  near 4 stroking IMO.  They need to get away from the on the limiter sound ( I call it stutter) and get to fat side turn rich for four stroking IMO.  Counterclockwise open the H up fat to hear 4 stroking.
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Offline Magnus

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Re: Unlimited coil for 372xp timing?
« Reply #8 on: February 08, 2014, 01:16:19 pm »
Some saws four stroke up to and beond limiter.
Others are happy long before limiter hits.

Setting saws after performance rather than rpm can present real surprises.


Harder to hear in higher rpm's than lower.

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Offline eriksat1

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Re: Unlimited coil for 372xp timing?
« Reply #9 on: February 08, 2014, 02:03:10 pm »
I is also easier to hear the high end 4 stroking if you are wearing ear plugs. On my 2007 372 I have a hard time telling the limiter from the 4 stroke, the only way I can do it is in the wood. Any way I also ordered a tech tach 20k I need a new toy to play with.

 

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