RE: Distributor

[jpa@xxxxxxxxxxxxxxxxxxx]

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John Albers
Global Technical Training Development Manager
DCA - Technical Training
248-475-1370  t/l  791-1370
e-mail: jpa@xxxxxxx

Actually the start pickup was set at 8 BTDC on the B engines and was used 
during crank only.  As the engine lit off and the RPM increased at about 
400 RPM the engine controller would switch over to the run pick which was 
fixed on the plate at 45 BTDC.  The engine controller then retarded the 
timing to the correct amount of advance based on coolant temp, throttle 
transducer position and vacuum.  AF ratio was 17 to 18 to one.  The 76 
package performed well and had no egr, air pump or cats.  In 77 the 
standards changed and egr and air pump air switching and cats were added. 
Also the torque converter stator ratio was changed from 1.99 to 1.76 if I 
remember correctly.  Its been a long time since I thought about our lean 
burn cars. 

John 




ntolerance <ntolerance@xxxxxxxxxxx> 
03/13/2005 11:40 AM
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Subject
RE: Distributor






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Lean burn distributors have two pickup inside them. The ideal was, to 
change the timing(crudely) to help with emissions, and starting.

The performance application, is to run a lean burn dist, and have the 
system wired to be able to manually switch between the two pickups. One 
pickup has the timing retarded, for instance, if you were running 
nitrous, you could wire the retarded pickup to be activated with your 
nitrous, thereby reducing the timing to prevent detonation, but alowing 
a bigger shot of the spray.

There is also a starting benefit, but I dont recall the details. I 
beleive it is running the advanced pickup to start the engine easier, 
then switching over to the retarded pickup which is set at your desired 
timing spec. I beleive this was for car with radical cams, but my 
memeory is a bit vague.

But either way, if one were to use this type of set up, you would NOT 
use the lean burn computer. This was the source of many runing/starting 
issues with the lean burn cars. The computer tech wasnt up to the task 
in the mid to late 70's. The pick ups in the lean burn dist look and 
perform just like a std elec. dist, its just that there are two of them.

I think the pick ups are set either 4 or 8 degrees apart, I cant 
remember. Its a cheap an effective way to retard or advance your timing 
form inside the car. Its really a low tech way of doing it, I wouldnt 
suggest it unless your combo requires it for reducing detonation. 
Normally, a properly set up std elec. unit will do nearly all tasks 
asked of it.

Help out any?

Doc.
ledman_70@xxxxxxxxxxx wrote:
> 
> Why is that, how are they different?
> Jimmy Peavy wrote:
> > 
> > You don't want it.
> > It'll never run right with this distributor.
> > Get a new electronic distributor kit, such as Mopar Performance's , 
or.
> > 
> >     Jimmy
> > 
> > ledman_70@xxxxxxxxxxx wrote:
> > 
> > >[AD removed for archives]
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> > >
> > >Hey guys, I'm looking at buying an NOS 440 distributor for my 413, 
the 
> > >guy says it's for a lean burn motor. Never heard of this making any 
> > >difference, but will it work in my motor with some hi-po mods and 
chrome 
> > >
> > >
> > >elec. box, or only in a lean burn motor? Thanks
> > >
> > >Jeff Adams
> > >64 Polara
> > >
> > >[AD removed for archives]
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> > >----
> > >Please address private mail -- mail of interest to only one person -- 

> > >directly to that person.  I.e., send parts/car transactions and 
> > >negotiations as well as other personal messages only to the intended 
> > >recipient, not to the Clubhouse public address. This practice will 
> > >protect your privacy, reduce the total volume of mail and fine tune 
the 
> > >content signal to Mopar topic.  Thanks!
> > >
> > >'62 to '65 Mopar Clubhouse Discussion Guidelines:
> > >http://www.1962to1965mopar.ornocar.org/mletiq.html. 
> > >
> > >
> > > 
> > >
> > 
> > 
> 
> 
> 
> Jeff Adams
> 64 Polara

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----
Please address private mail -- mail of interest to only one person -- 
directly to that person.  I.e., send parts/car transactions and 
negotiations as well as other personal messages only to the intended 
recipient, not to the Clubhouse public address. This practice will protect 
your privacy, reduce the total volume of mail and fine tune the content 
signal to Mopar topic.  Thanks!

'62 to '65 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html. 



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Please address private mail -- mail of interest to only one person -- directly to that person.  I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic.  Thanks!

'62 to '65 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html. 



bOyW3N.