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Discussion Starter #1
Hi gang. I am currently re-installing my MSD 6AL, distributor, coil, ect. I have also installed a 100HP Nitrous plate from NOS. I purchased a "timing computer" from MSD that works along with the MSD 6AL that will retard my timing when I hit the Nitrous button.

Here is my question : the timing computer has the option to control the timing as well. If I "lock out" the mechanical and vacuum advance of my distributor, I can then use the timing computer to have my timing at say 15degrees up to 1000 rpm. From there it will gradually advance a total of 20 degrees at 3000RPM's and then be 35 degrees. Whatever I set my Mechanical advance at, it will retard it 20 degrees. Understand?? If my Mech. advance was say 38 degrees, then this would retard it to 18 degrees, then at 1000 rpm's it would begin to advance until it reached the 38degrees.

Should I use this, or stick with the vacuum/mech. dist.?? This will not be a daily driver, but a stoplight racer that will do some bracket racing once a month or so.

Give me some input people.....

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I saw this post come up and wondered what to say. You have had 40 views and
not a lot of response. With nitrous if you do it wrong it goes BOOM! I would contact
the people who sold you the kit and follow there instructions to the T. A motor is
a terrible thing to waste! Make sure you have plenty of fuel pressure. This is something
you don't want to guess at.
 
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I agree....for this discussion however, I think the Nitrous is moot. I WILL be using the retard feature of the timing box. When I hit the switch, it will retard my timing 4 degrees. What is in question is do I ditch the vac. advance for the "computerized" timing or not. I have the option. The computer will give me 20 retard at startup to 1000 rpms, then increase timing to whatever my timing is(mechanincal timing if you will) at 3000 rpms. That is the question here. The Nitrous shouldn't have anything to do with it. I won't be hitting the N2O before 3000 anyways :)

Thanks for the reply..keep 'M comming!!

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I think using the computer to handle the timing is a great idea. Changes would be alot easier. I wish I
could manipulate my timing without pulling the distributor and messing with springs and such. I would
use it! I can't think of any resone note to...

1966 Mustang Coupe, 302 custom roller cam, holley 650dp,http://www.289mustang.com
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I like the idea of using the comp. to adj. the timing. It has to be
more accurate than the vacuum or mech. My brother in-law has a
'56 Chevy, he has electronic fuel injection, dist, and trans. He adj. the
timing, shift points and fuel with a lap-top. He is good at it, the
all steel '56 has ran a 12.40 in the 1/4. That is darn fast for a
street driven shoe box! I like your idea and it sounds like it will
work. If it pings you may have to slow down the adv. some.
 
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The only thing I see is that it is NOT adjustable. it is a 20 degree advance. Period. Now I can adjust the point at which the advance happens, I.E. 15 degrees intial, +20 degrees = 35 total. 18 initial +20 degrees = 38 total. That is the only adjustments I will have.

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Mine has worked great. I didn't just buy it for the buying. My Mallory mechanical advance distributor that is fine otherwise started to hang on me. The advance weights would stick on the plate and my timing would jump around unpredictably. I wound up having to lock down my timing. For a while I just ran total timing all the time and managed to burn up 3 solenoids, a starter wire and 2 starters in the process.

I don't like the fact that the advance curve and amount is not adjustable but I haven't had any problems with it that way so far. I am considering going to just a 20 degree start retard and total timing all the rest of the time. My motor seems to idle better with a lot of timing.

MSD makes 4 or 5 different kinds of little boxes that deal with timing in different ways. It would be nice if they made one box that had all the features in it. I guess then they wouldn't make as much money as they do though or they would have to ask 3 or 4 prices for it.



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