Re: 340 timing settings
[Re: radar]
#1271373
07/21/12 09:18 AM
07/21/12 09:18 AM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Unplug the vac advance and get the total in the 34 deg range if the initial is up over 10 you can probably run it just fine. You have a mild setup. If you want to tune the curve then you would start with the initial then set the mechanical (by welding up or lengthening the slots in the plate inside) to get your total, then mess with the springs to set the rate, then tune the vac. can with a little allen thru the nipple.
Good luck!
He has a MP distributer...so no welding slots, a 484 cam is not mild imo and he is gonna need a lot more 10 degrees intial timing.
Don't worry about the vacuum advance at this point, no adjustment will be needed to begin with if ever!
Learn how to tune your distributer, it will pay big dividends.
Those torx screws are what you loosen to limit your total timing.
I run a 340 with a 474 cam and need about 20 intial timing, only I have eddie heads with a 340 victor intake, I tried the dual plane and hate it. Give me a single plane with no heat passages. I tune mine all the time beause I take all over the country and drive it, I'm a lucky guy. I drive mine, it ain't no show poddle.
Good luck with your new motor!
The day I put it in.
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Re: 340 timing settings
[Re: 71SCAMP]
#1271374
07/21/12 10:13 AM
07/21/12 10:13 AM
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Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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If you're getting ready to fire up a new breakin I'd set the initial at 15 then have a helper twist the dist to 35 when it starts (vac adv capped) as you'll be in the 2500 rpm range. Make a mark on the dampener 2&1/4" clockwise from the TDC slit which'll be 35.5 degrees. After breakin What Radar said, initial (vac gauge method)/total(35 w vac capped)/springs/then hookup/tune vac adv IN ORDER
live every 24 hour block of time like it's your last day on earth
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Re: 340 timing settings
[Re: 71SCAMP]
#1271375
07/22/12 12:26 AM
07/22/12 12:26 AM
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Joined: Jan 2003
Posts: 8,144
Arkansas
340727dart
master
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master
Joined: Jan 2003
Posts: 8,144
Arkansas
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What kind of pistons are you using?
If they happen to be KB hypereutectics, the manufacturer says to limit total advance to 34*.
Your life is not my fault.
My life is none of your business.
Speech is free only if you agree with those in control.
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Re: 340 timing settings
[Re: 340727dart]
#1271376
07/22/12 02:29 PM
07/22/12 02:29 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
What kind of pistons are you using?
If they happen to be KB hypereutectics, the manufacturer says to limit total advance to 34*.
Got a link to that?
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Re: 340 timing settings
[Re: Challenger 1]
#1271377
07/22/12 08:43 PM
07/22/12 08:43 PM
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Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
RobX4406
I Live Here
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I Live Here
Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
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Quote:
Quote:
What kind of pistons are you using?
If they happen to be KB hypereutectics, the manufacturer says to limit total advance to 34*.
Got a link to that?
I remember seeing something about running 2-4 degrees less timing, but never a top side limit for timing.
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Re: 340 timing settings
[Re: 71SCAMP]
#1271378
07/23/12 10:46 AM
07/23/12 10:46 AM
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Joined: Jan 2003
Posts: 5,270
Missouri
MY340
master
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master
Joined: Jan 2003
Posts: 5,270
Missouri
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On my old 340-4spd Spaceduster with the MP 508 cam I ran 22 degrees intial and 36 total with vacuum advance disconnected. Timing all in at 2400rpm.
1970 FE5 Duster 360/904/3.91's SOLD
1973 TB3 SpaceDuster 340/4spd/4.10's SOLD
Moparless for now but when the opportunity is right I'll have another one.
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