timing curvage

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Sep 22, 2009 | 10:43 PM

barca_texas

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Joined: Mar 2004

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From: Georgetown Tx

timing curvage

I've been trying to nail down the "best performing" timing curve for my 86 f250 xlt (xtra long truck). I dizzy springs are a light set and mechanical advance is limited about 20 degrees. So I am guessing my total advance is about 32-36
degrees. I dont know at what rpm my total advance is complete... I will measure it after i put on my new-ish "readable" harmonic balancer. SO, yes I have been tuning the timing by ear.
I order to get enough advance I have my dizzy rotated way counter clockwise...So my questions???
1, is my total timing in the ballpark? 32-36 degrees?
2.Way back when i first worked in my dizzy, did I stab it one gear tooth off? Is that why my dizzy adjustment is maxed out to the left direction? I have never heard my motor ping or knock and I am maxed out on distributor advance adjustment....thanks ya'll..... Barca_Texas.
(God I'm glad summer's over with)

Sep 23, 2009 | 12:05 AM

mark a.

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Sounds like it.

Sep 23, 2009 | 08:24 PM

maxell3655

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Joined: Nov 2008

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on my 92 it is set for 12 degrees andit goes quicker now. stock is ten. might bedifferent for the 86 though

Sep 24, 2009 | 07:34 AM

gfw1985

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Joined: Mar 2008

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From: Raphine, Virginia

Depending on which springs you used, stock light or Crane yellow, you are probably reaching full advance at 2800-3200 rpm. Using a 10L slot will give you 20* centrifical plus your initial advance. X2 on stabbing the dizzy.