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Author
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Topic: timing help?
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gingerbreadman
Journeyman Posts: 8
From: kamloops b.c. canada
Registered: Apr 2002
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posted 04-10-2002 01:48 AM
   
ok.. i think i am starting to understand this whole timing thing a little bit (iv sure posted enough on it) so hear goes. i have my vaccume disconnected..i go out and i find my sweet spot for timing...
now when i hook my vaccume advance up it isnt going to give me any more advance at top end is it? only at lower cruising speeds under 3000 right now what is the maxim total advance i can have or is that something that depends on the motor.. so what i do is find out what my initial is and add what my curve is set at right and that is my total timng right?? tell me if i am correct in all of this guys??? thanks -gbm-
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capri man
Gearhead Posts: 7611
From: doerun, ga.
Registered: Nov 2000
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posted 04-10-2002 07:03 AM
hi gbm, here is a good article on timing. it helped me a lot.http://www.fordmuscle.com/archives/2000/03/timing/index.shtml ------------------
mike r
racing is real
everything else is just a game.
81 capri-7.56 @88mph 1/8
1.56 60 ft.
http://prestage.com/site/site_display.asp?SiteID=141
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bluestreek
Gearhead Posts: 1724
From: Athens,GA
Registered: Jul 2001
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posted 04-10-2002 08:53 AM
Generally speaking, the more advance you can get without spark-knock, the more power you will produce from your engine.
The easiest way to know what your total timing is, would be to mark your flywheel for a full 40 degrees and then you'll be able to see exactly what your total timing is running at, with a timing light. All engine combinations like different amounts of timing. This is where a dyno or test and tune comes in handy. I have found over the years that tight N/A engines like to start at around 10-16 degrees initial and like 34-40 degrees total, all in by 3000 rpms. Compression, cumbustion chamber design, and octane level of the fuel, will effect these numbers. If the car engine is not too loud, you can hear a spark knock at a low rpm pull when the base timing is advanced too far for the octane of the fuel. If the timing is advancing too far at high rpms, the engine will start to misfire or "pop out" on the top end.hope this helps, BS
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capri man
Gearhead Posts: 7611
From: doerun, ga.
Registered: Nov 2000
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posted 04-10-2002 09:31 AM
i want to take some of the low end torque out of my 306. i am more concerend about consistancy than speed. any ideas on timing? thanks------------------
mike r
racing is real
everything else is just a game.
81 capri-7.56 @88mph 1/8
1.56 60 ft.
http://prestage.com/site/site_display.asp?SiteID=141
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bluestreek
Gearhead Posts: 1724
From: Athens,GA
Registered: Jul 2001
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posted 04-10-2002 12:49 PM
quote:
Originally posted by capri man:
i want to take some of the low end torque out of my 306. i am more concerend about consistancy than speed. any ideas on timing? thanks
Mike!! You are kidding right??  Anything you do to the timing to lower your torque, will probably cause a carburetion problem too. Have you tried a lightweight flywheel? They can cut down on rotational torque off the line. Also a bigger gear ratio will slow the tire speed down and may help on your consistency. BS
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