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Main : Mechanical B310 Electronic Distributor: Warning

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B310 Electronic Distributor: Warning
B310 Electronic Distributor: WarningPopular
SubmitterddgonzalMore Photos from ddgonzal   Last Update2007/9/4 6:28    Tell a friendTell a friend
Hits5109  Comments4    0.00 (0 votes)0.00 (0 votes)
Most of the distributors I got have this problem. Note the mis-alignment of the reluctor.

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Poster Thread
ddgonzal
Posted: 2007/9/4 6:35  Updated: 2007/9/4 6:35
Moderator
Joined: 2001/5/3
From: 48 North
Posts: 31605
 Re: B310 Electronic Distributor: Warning
It is caused by a bad "breaker plate" assembly -- what i would call the vacuum-advance plate.

In some of the distributors you can see ball bearings loose in the housing. In the others I couldn't see, but they are all broken. That's the problem, the BBs are held in by a plastic race, which is broken on every distributor I have, save one which used a different design. For a photo guide, see Atlantic Z distributor rebuild.

Nissan have new breaker plates, but they are a $72 part.

The other problem is bad vacuum advance on most of the distributors.

So when looking at the wreckers, to ensure you obtain a good unit:
* make sure the 'teeth' line up evenly
* Check vacuum advance, bring a gun with you
* Wiggle the shaft from side to side. It should have no or a tiny bit of play. If it has enough to allow the teeth to hit the relucator, that's way too much.

B310 Electronic Distributor Swap: wiki.

Poster Thread
1200rallycar
Posted: 2007/9/4 11:06  Updated: 2007/9/4 11:06
No life (a.k.a. DattoMaster)
Joined: 2002/3/20
From: Melbourne, Australia
Posts: 8221
 Re: B310 Electronic Distributor: Warning
hmmm

could this be why my a15ett is so crapply tuned?

my dizzy displays these symptoms...

it hates reving over 4000... it gets really flat after that

maybe i should upgrade my dizzy... thanks for the info

Poster Thread
WhiteSedan
Posted: 2007/9/4 11:08  Updated: 2007/9/4 11:08
No life (a.k.a. DattoMaster)
Joined: 2004/7/15
From: Adelaide, Australia
Posts: 3931
 Re: B310 Electronic Distributor: Warning
Umm, I bought one of these new off ebay about a year ago, at least mine should work for a while before it develops these symptoms, Cheers for the heads up.

Poster Thread
ddgonzal
Posted: 2007/9/5 5:12  Updated: 2007/9/5 5:12
Moderator
Joined: 2001/5/3
From: 48 North
Posts: 31605
 Re: B310 Electronic Distributor: Warning
My distributor, which I've been running for two years, had two ball bearings loose inside. Yet it ran clean up to 6000 rpm (I've never tried to go higher).

However the vacuum advance was broken (leaking) so it should run even better once I get it fixed. Vacuum Advance works in partial throttle conditions (and has no effect on full-throttle).