[Mg-t] Further to; Running, but not well

[John Seim]

Rick, there are two different distributors shaft lengths used.
The shaft length is the difference.
Early dist. 40048 and 40162 are to be used in banana hole blocks, with a center bolt holding the distributor in place.
These distributors have a longer shaft length, as a micrometer adjuster, or a clamp and a spacing washer, were to be used 
with the distributor installation in the car.
If you use these in a later style engine, the gear will sit below the gear on the cam, the cam gear will carve a section out of
the distributor shaft, and your timing will jump around a little.

The round hole blocks have a shaft with a half moon holding the dist. in place. 
They eliminated the clamp, and decreased the dist. shaft length by 3/8 inch.
Distributor numbers 40367 and 40368 fall into this category.
If you use them in an early engine, with a clamp, the gear will barely engage the cam gear, and your timing will jump
all over the place.

John Seim

On Apr 20, 2015, at 5:45 PM, Rick Lindsay wrote:

> Hi Friends,
> 
> Update: With timing set to TDC (static) the car starts okay. On the timing light, actual timing jumps around quite a bit. Inside the distributor, the springs on the centripetal advance don't look right. They don't look like any advance springs I have ever seen. Small gauge wire and new-looking. Fitment is poor too. 
> 
> I have a set of springs from an E-Type. I'll put them in as a test, just a test. If the idle timing is stable, I'll order a correct set for proper advance.
> 
> Lots of backfiring AND carb spitting when opening the throttle, if the timing is tweaked...even a little. 
> 
> Any way the cam timing could have jumped?
> 
> Thanks for your ongoing support.
> 
> -rick
> 
> 
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