Re: Re: H distributor plate marks - possibly for D

Posted by Stan(VA). on July 09, 2004 at 09:20:13 from (69.19.7.156):

In Reply to: Re: H distributor plate marks - possibly for Dave posted by Dave W V on July 08, 2004 at 18:04:02:

Dave,
this post rang a bell, so I went back and checked and found a NOS distributor update kit I bought a while back. I had to install a new shaft once to replace one that had self destructed, (probably due to a PO installing screws too long) so I bought another kit as soon as I found it just in case. It is part# 374262R91, comes with 22L shaft, new set of weights and a pin.

It has an instruction sheet that lists this number for basically all C123's (and C113's in early Super A's), C248's and C264's. Note says use shaft with 22 degree marking, but doesn't state what that is, so I assume the '22L'.

Sheet also says 374856R91 was for all the H, 4, and Super series also with a 22 degree shaft.

It lists 374889R91 for C113's in A, B and U-2 models with a 30 degree shaft.

It lists 374897R91 for C113's in the C and U-2A's (up to a SN split) with a 25 degree shaft.

On the back of the sheet, it says that each kit comes with a shaft, two factory matched distributor governor springs and the distributor gear pin. And since there is a different part number for the kit that covers the Super H and the Super C, (although each specs the 22 degree shaft) I assume that the springs are different? I always did wonder why they recommended less max advance with the higher output motors in the Super series? Allways guessed that they were correcting a mistake in the earlier motors based on later testing. Now that I think about it, higher compression would tend to make it a more volitile mix that would burn quicker.
Stan(VA).

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