C6(?) to AOD conversion
Old School Hot Rodder
Joined: Feb 2006
Posts: 6,472
Likes: 11
From: Exmore, VA
I would start by finding out why your present system isn't working. It may be as simple as a bad ground on the computer harness. On the EFI 85-86 models there is a ground at the battery negative side for the EEC. On those it won't even start with a bad ground.
If you want to use an AOD, first, they are controlled by a mechanical connection from the throttle to the transmission, not like a C6 which uses vacuum and a downshift rod. If you go that route, I have a NOS throttle cable for a 300 with carburetor to transmission throttle lever (at least it was what was ordered). Just no brackets.
If you want to use an AOD, first, they are controlled by a mechanical connection from the throttle to the transmission, not like a C6 which uses vacuum and a downshift rod. If you go that route, I have a NOS throttle cable for a 300 with carburetor to transmission throttle lever (at least it was what was ordered). Just no brackets.
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New User
Joined: Sep 2012
Posts: 10
Likes: 0
How are you going to advance the timing? That's the whole problem. Your dist just has a pickup sensor inside and a rotor on the top. The duraspark dist has a shaft within a shaft with springs and weights, and as the rpm increases, the weights fly out and advance the timing. And it also has a arm with a vacuum advance on it, and controls the timing according to engine load.
Your TFI dist has nothing in it. The MSD just generates the spark. It doesn't know when to generate the spark, the dist tells it.
Your TFI dist has nothing in it. The MSD just generates the spark. It doesn't know when to generate the spark, the dist tells it.
Moderator
Joined: Jan 2001
Posts: 56,977
Likes: 2,733
From: Virginia
I think you are misunderstanding how that ignition works, but call them first to make sure. I see a rpm limiter adjustment, but I see no adjustment or talk about a "map" that has rpm versus advance curve.
Moderator
Joined: Jan 2001
Posts: 56,977
Likes: 2,733
From: Virginia
I think he is listening, he hasn't left yet. I think he will get it, there is a learning curve to some of this stuff.
I sometimes wish I could drive my truck like most people, and not know anything about what's under the hood. Just turn the key and hear something whirring under the hood, and when it doesn't work anymore, have the money to pay someone else to work on it to get that whirring noise to come back when I turn the key.
But then I listen to horror stories of people getting terrible service and never getting their vehicle right again. That and the money makes me want to know how it all works.
I sometimes wish I could drive my truck like most people, and not know anything about what's under the hood. Just turn the key and hear something whirring under the hood, and when it doesn't work anymore, have the money to pay someone else to work on it to get that whirring noise to come back when I turn the key.
But then I listen to horror stories of people getting terrible service and never getting their vehicle right again. That and the money makes me want to know how it all works.
Old School Hot Rodder
Joined: Feb 2006
Posts: 6,472
Likes: 11
From: Exmore, VA
Dave, you have weighed in on my huge thread about what I am doing to my 86 F-350. You understand why I am doing a lot of it. BTW, last fill-up, 11.7 mpg, up from the 10 it used to get when I first bought it in 1994, and way up from what I was getting with all the government crap in today's gas.
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