Re: Initial and Total Timing '69 Road Runner 383
[Re: VITC_GTX]
#3095394
11/19/22 12:23 AM
11/19/22 12:23 AM
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Posts: 16,186 Mesa, Arizona
dart4forte
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You have a dial back timing light?
“So if it’s on the internet it must be true”
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Re: Initial and Total Timing '69 Road Runner 383
[Re: bobby66]
#3095405
11/19/22 01:57 AM
11/19/22 01:57 AM
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Joined: Feb 2015
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crackedback
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18 initial and 34 total. Adjust as needed. These sound #'s good! Sort out initial first. probably land in the 14-18 range, then total wherever it doesn't detonate. 34 is a good start.
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Re: Initial and Total Timing '69 Road Runner 383
[Re: dart4forte]
#3095412
11/19/22 02:27 AM
11/19/22 02:27 AM
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Joined: Mar 2003
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VITC_GTX
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You have a dial back timing light? Good question. I do have one of these. Looks like I should start in the 14-18 range and then I'll have to fill in my slots in the plate of the distributor to limit the mechanical advance. Thanks.
Last edited by VITC_GTX; 11/19/22 02:28 AM.
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Re: Initial and Total Timing '69 Road Runner 383
[Re: lewtot184]
#3095521
11/19/22 02:23 PM
11/19/22 02:23 PM
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Joined: Feb 2015
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crackedback
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Stock 318's like 10-12 initial timing
initial is the foundation for all other timing events. My suggestion is give the engine what it wants at idle, then build from there.
The old school wherever it lands is a poor approach. JMO.
Last edited by crackedback; 11/19/22 02:24 PM.
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Re: Initial and Total Timing '69 Road Runner 383
[Re: crackedback]
#3095553
11/19/22 03:36 PM
11/19/22 03:36 PM
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Joined: Aug 2003
Posts: 43,719 Bend,OR USA
Cab_Burge
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18 initial and 34 total. Adjust as needed. These sound #'s good! Sort out initial first. probably land in the 14-18 range, then total wherever it doesn't detonate. 34 is a good start. That is what I use on my street and strip BB motors on pump gas Idling from 12 to 18 BTDC and all in (34 to 36 BTDC depending on the altitude by 2400 RPM
Last edited by Cab_Burge; 11/21/22 01:47 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Initial and Total Timing '69 Road Runner 383
[Re: SportF]
#3096007
11/21/22 12:29 PM
11/21/22 12:29 PM
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JohnRR
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If you are interested in performance, I suggest you ask a bunch of mopar drag racers at the track what they do. Their answers are probably different from that of which you hear here. Best of luck. This worked for me in 06 at the Pure stock drags, it was suggested that I run 42 total by a veteran PS racer from Detroit , I went as high as 39 and dumped a couple gallons of 110oct on top of the1/4 tank 93oct for piece of mind, the car picked up a couple tenths ...
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Re: Initial and Total Timing '69 Road Runner 383
[Re: JohnRR]
#3096123
11/21/22 06:27 PM
11/21/22 06:27 PM
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Joined: Feb 2005
Posts: 4,333 Prospect, PA
BSB67
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If you are interested in performance, I suggest you ask a bunch of mopar drag racers at the track what they do. Their answers are probably different from that of which you hear here. Best of luck. This worked for me in 06 at the Pure stock drags, it was suggested that I run 42 total by a veteran PS racer from Detroit , I went as high as 39 and dumped a couple gallons of 110oct on top of the1/4 tank 93oct for piece of mind, the car picked up a couple tenths ... This. 42 degrees was pretty common. I ran 39-40.
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Re: Initial and Total Timing '69 Road Runner 383
[Re: BSB67]
#3096124
11/21/22 06:39 PM
11/21/22 06:39 PM
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Joined: Aug 2003
Posts: 43,719 Bend,OR USA
Cab_Burge
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[quote=SportF]If you are interested in performance, I suggest you ask a bunch of mopar drag racers at the track what they do. Their answers are probably different from that of which you hear here. Best of luck. This worked for me in 06 at the Pure stock drags, it was suggested that I run 42 total by a veteran PS racer from Detroit , I went as high as 39 and dumped a couple gallons of 110oct on top of the1/4 tank 93oct for piece of mind, the car picked up a couple tenths ... This. 42 degrees was pretty common. I ran 39-40. [/quote ] Every time I have tried setting the verified total timing above 36 BTDC at any 1/4 mile track doing testing on every BB Mopar I've tuned slowed the car down in the ET and MPH Don Wann, NHRA division 7 long time Mopar drag racer, had told me years ago that the 1963 Plymouth M.W. Savoy he owned and raced like 42 BTDC total timing, so I tried that on my legal 1963 415 HP Max Wedge NHRA stocker and it slowed down I learn later that he didn't build the motors for his cars, a machine shop did them for his sponsor and it ended up that they had put a later year (1967 and later) timing cover on his M.W. motor with the original dampener making it read falsely My message is trust and VERIFY
Last edited by Cab_Burge; 11/21/22 06:41 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Initial and Total Timing '69 Road Runner 383
[Re: Cab_Burge]
#3096211
11/21/22 11:58 PM
11/21/22 11:58 PM
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Joined: Feb 2003
Posts: 10,294 Someplace you aren't
SomeCarGuy
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Mopar action this summer mentioned 33-35 is sweet spot for power on a big block. I had found 34 worked best years ago. One time I had the distributor out, it bumped to 33 when I locked it down. I left it there and noticed no difference really so I’d vouch for their numbers.
Mopar used to say in the speed books that you should run 38. Back in the 70s you probably didn’t have a problem finding better fuels. I tried 38 and I got .5 mpg better, but it ran rough. I think it was signs of pre-ignition. Backing it down, that stock 383 hp smoothed out at 34 and was the smoothest engine I’ve ever had. That one was all factory built when I tore it down for a new chain and seals.
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Re: Initial and Total Timing '69 Road Runner 383
[Re: SomeCarGuy]
#3096261
11/22/22 10:35 AM
11/22/22 10:35 AM
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Joined: Feb 2021
Posts: 157 PINE VALLEY
Ray S
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38 is from Basic Startup and Adjustment and Ignition Tuning for Maximum Performance taken directly from the Mopar Performance Small Block V-8 Electronic Ignition Kit instruction sheet 56 BTDC all in. http://www.mopar1.us/engine2.htmlEngine Heads Timing Specification A Production - Pre '89 (Iron) 35 BTDC A Production - '89 & Newer (Iron) 32 BTDC A W2 (Iron) 35 BTDC A W5 (Alum.) 35 BTDC B/RB Production (Iron) 38 BTDC B/RB Stage I, II, III, IV, V (Iron or Alum) 38 BTDC B/RB Indy (Alum) 35 BTDC B/RB B1 (Alum) Under 475 cu. in. 37-39 BTDC B/RB B1 (Alum) Over 475 cu. in., Under 15.0:1 Ratio 36-38 BTDC B/RB B1 (Alum) Over 475 cu. in., Over 15.0:1 Ratio 34-36 BTDC B/RB B1 TS 34 BTDC Hemi All (Iron or Alum) 35 BTDC
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Re: Initial and Total Timing '69 Road Runner 383
[Re: Ray S]
#3096423
11/22/22 10:18 PM
11/22/22 10:18 PM
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Joined: Jan 2003
Posts: 15,829 Omaha Ne
TJP
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38 is from Basic Startup and Adjustment and Ignition Tuning for Maximum Performance taken directly from the Mopar Performance Small Block V-8 Electronic Ignition Kit instruction sheet 56 BTDC all in. http://www.mopar1.us/engine2.htmlEngine Heads Timing Specification A Production - Pre '89 (Iron) 35 BTDC A Production - '89 & Newer (Iron) 32 BTDC A W2 (Iron) 35 BTDC A W5 (Alum.) 35 BTDC B/RB Production (Iron) 38 BTDC B/RB Stage I, II, III, IV, V (Iron or Alum) 38 BTDC B/RB Indy (Alum) 35 BTDC B/RB B1 (Alum) Under 475 cu. in. 37-39 BTDC B/RB B1 (Alum) Over 475 cu. in., Under 15.0:1 Ratio 36-38 BTDC B/RB B1 (Alum) Over 475 cu. in., Over 15.0:1 Ratio 34-36 BTDC B/RB B1 TS 34 BTDC Hemi All (Iron or Alum) 35 BTDC In my experience some motors will tolerate that Much vacuum advance and others will not. IMO it is best to break the motor in on the conservatives side and then start experimenting
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