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Re: Chrysler 318 LA-Block - Stock Ignition Timing
Reed #379906 April 22nd 2010 1:51 am
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old hand
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Typically I've seen 32-36 degrees total timing on mopar small blocks (moparts.org) seems to be a sweet spot for stock to modified engines. Most guys I've read advance as much as they can initially then "adjust" to about that range for total timing. In my case I run about 16 deg initial timing and 34 deg total timing. All in by 3000 rpm. Good luck!


1972 Dodge Van "Tigerlilly" - Blazing Copper/Sandstone Metallic - 3850 lbs empty
13.47 @ 97.53 mph N/A - 11.94 @ 113.33 mph N2O - old 360/727 + Nitrous (N2O)combo
Viper V10 + 4L80E conversion in progress...

2009 Dodge Challenger SRT8 "Leelu" - TorRed - 6.1L Hemi/6 speed - Supercharged - SOLD

1990 Celica Alltrac "Emma" - 2.0L 4cyl Turbo AWD - 327awhp - 21-22mpg freeway, 17-ish mixed daily use - 13.2 @ 108 best so far.

2007 Chrysler 300C SRT8 "Ruby Rod" - 6.1L Hemi - pretty much bone stock driver - With 425hp
Re: Chrysler 318 LA-Block - Stock Ignition Timing
Alikazam #379927 April 22nd 2010 7:10 am
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I generally use a vacuum gauge to set timing. Sometimes it's a PITA to see the timing marks on an early.


Nate Breece
Re: Chrysler 318 LA-Block - Stock Ignition Timing
Alikazam #379975 April 22nd 2010 11:00 am
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Maniac
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32-36 total timing does not include vacuum advance, which is very important for fuel economy and performance on a street motor.

Setting timing by vacuum isn't the best way to do it. You need to know (a) how many degrees of advance the governor in your distributor provides, (b) how many degrees of advance your vacuum advance pod provides (and when it provides it), and (c) what your target total degrees of mechanical and total timing is. For example, setting your base timing at 16 degrees BTDC with a distributor that has a governor that allows 30 degrees of advance will give you a total of 46 degrees mechanical timing advance. Add to that a vacuum advance pod that gives another 20 degrees of vacuum advance and you have a distributor that will provide 66 degrees of timing advance- way too much.

When using a stock distributor, use stock timing specs. If you have a remanufactured or other unknown distributor you really need to take it apart and determine what, exactly, you have, and what you ned to do to get the timing curve optimized for your vehicle.


Windows- they're what make a van worth owning!
Re: Chrysler 318 LA-Block - Stock Ignition Timing
Reed #379990 April 22nd 2010 12:10 pm
Joined: Sep 2009
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old hand
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As reed said, knowing what you have is important. I run an MSD Billet mechanical advance only distributor, running adjustable timing on it that you can dial your total mechanical advance amount anywhere from 24 degrees to locked out (0 degrees). So I run an 18 degree bushing in mine, fyi.

Know what you have and/or recurve your own distributor if you want to, it can be done on a stock one, it is just a bit more involved including welding up slots, etc. It depends on how far you really want to go. Good luck!


1972 Dodge Van "Tigerlilly" - Blazing Copper/Sandstone Metallic - 3850 lbs empty
13.47 @ 97.53 mph N/A - 11.94 @ 113.33 mph N2O - old 360/727 + Nitrous (N2O)combo
Viper V10 + 4L80E conversion in progress...

2009 Dodge Challenger SRT8 "Leelu" - TorRed - 6.1L Hemi/6 speed - Supercharged - SOLD

1990 Celica Alltrac "Emma" - 2.0L 4cyl Turbo AWD - 327awhp - 21-22mpg freeway, 17-ish mixed daily use - 13.2 @ 108 best so far.

2007 Chrysler 300C SRT8 "Ruby Rod" - 6.1L Hemi - pretty much bone stock driver - With 425hp
Re: Chrysler 318 LA-Block - Stock Ignition Timing
Alikazam #379995 April 22nd 2010 12:34 pm
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Thats good info thanks guys. I was confusing myself.

I'm running a brand spanking new MSD digital E-Curve PN: 8504 its a trip man! I'm going to go home tonight and play with it some more.


.-=[NGV]=-.

Re: Chrysler 318 LA-Block - Stock Ignition Timing
HomeBrew #380009 April 22nd 2010 1:21 pm
Joined: Jun 2009
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The E-curves are weird since you have to figure out your total advance and program that in with the curve with the pots. I have one for the '32, due to the tight confines and no vacuum canister.

Re: Chrysler 318 LA-Block - Stock Ignition Timing
M_S #380031 April 22nd 2010 2:25 pm
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Maniac
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I've never messed with that fancy-schmancy expensive MSD stuff. You can do just fine with a good old stock Mopar distributor and parts. Once upon a time I found the formula to convert distributor governor slot length to degrees of advance. I need to find it again...


Windows- they're what make a van worth owning!
Re: Chrysler 318 LA-Block - Stock Ignition Timing
Reed #380091 April 22nd 2010 4:56 pm
Joined: Mar 2007
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oh dude, it is weird. Fancy shmancy over complicated backwards working gizmo. I've had moments of frustration and considered putting a stock like one in. I'm not giving up yet - Just gotta figure out how to work it right ;-) I spent some more tiem on the phoen with the msd techs.... I think I got my head wrapped around it. Now my problem (like nate pointed out) is the timing marks, or lack there of.... Hopefully it will go Vroom and not Boom.


.-=[NGV]=-.

Re: Chrysler 318 LA-Block - Stock Ignition Timing
HomeBrew #380097 April 22nd 2010 5:08 pm
Joined: Jun 2009
Posts: 1,170
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It basically works in reverse. You time it for max advance and the electronics zero it and feed in timing based on vacuum and rpm.

It threw me for a loop when I first read the instructions, but I guess it's logical in an entirely electronic distributor. The best part is the vacuum port location and small cap. Great for tight spaces.

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