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Re: 340 timing
[Re: 1237baxter]
#605360
02/05/10 08:21 PM
02/05/10 08:21 PM
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Joined: Jan 2003
Posts: 3,623
Millinocket, Maine
JonC
master
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master
Joined: Jan 2003
Posts: 3,623
Millinocket, Maine
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Quote:
what is a 340 suppose to be timed at
thanks
That is a WIDE open question!!!! Answers (or questions) will follow I'm sure. 
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Re: 340 timing
[Re: JonC]
#605361
02/05/10 10:04 PM
02/05/10 10:04 PM
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Joined: Dec 2007
Posts: 18,157
Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,157
Mass
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Quote:
Quote:
what is a 340 suppose to be timed at
thanks
That is a WIDE open question!!!! Answers (or questions) will follow I'm sure.
 All depends on YOUR set-up, what you desire, and what your engine "tolerates" or performs best with,.....I'd start with 10 degress BTDC and work from there 
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Re: 340 timing
[Re: DAYCLONA]
#605362
02/05/10 10:14 PM
02/05/10 10:14 PM
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Joined: Jan 2003
Posts: 5,443
Indiana
YO7_A66
master
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master
Joined: Jan 2003
Posts: 5,443
Indiana
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340's are not torque monsters. More initial timing will help bottom end performance. As said, start with 10 and test. Then test some more with 12, 14, etc. Your starter will be another variable. The original style starter will only take 16-18 or so initial timing. The mini starter will take 24-26 or more. You are after the best vacuum rating that your combo will achieve. This takes testing and some patience.
1970 YO7 A66 [Canadian Export] F8 Challenger
340 (Currently in shop for stroker assy.)
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Re: 340 timing
[Re: 1237baxter]
#605364
02/06/10 12:37 AM
02/06/10 12:37 AM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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more details on the eng, what cam, what idle speed. ~10-15 BTDC would be a good range and the vacuum gauge method has been used/recommended then with the initial amt known you would want to shorten the dist slots to get 35 total (w vac adv disconnected/hose plugged) then play w the springs for the adv to come in as fast as possible wo pinging at WOT then if vac adv is used plug it in & give it as much vac advance as it will take (3/32" allen wrench) wo pinging at part throttle.
Last edited by RapidRobert; 02/06/10 12:43 AM.
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Re: 340 timing
[Re: aarcuda]
#605366
02/06/10 02:35 PM
02/06/10 02:35 PM
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Joined: Dec 2007
Posts: 18,157
Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,157
Mass
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Quote:
My stock starter turns my motor over just fine at 32 deg (timing locked at 32)Quote:
Hmmm,....what a "co-winkadink"  my 340/6 is "locked" in at 32 degrees too, running a Mallory Marine YL mechanical dist,....with 11:1 compression, with a stock starter,......turns over pretty well,...trunk mounted battery too
Mike
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