Topic: 65-66 Hi-Po Alternator, changeover from -C to -H pulley?

[CharlesTurner]

There seems to be a date of 4/1/65 out there as the changeover from the -C hi-po alternator pulley to the -H, but I believe it was several months later than this, into '66 production.

Anyone have any input?  I have pictures of an unrestored '65 SJ car that was built in late May, early June '65 with the -C pulley.

Mainly interested in San Jose production, but would be good to discuss all plants.

[jwc66k]

My "K" engine has an assembly date of 5H23Z, scheduled build date of 10-18-65. It has a -H alternator pulley. The question is when was the alternator installed? What you ask may be more related to assembly line date than engine assembly date.
Jim

[Texas Swede]

Charles,
I believe you are correct. 65 Shelbys with May and June San Jose dates have all
had C-pulleys that I have seen.
Texas Swede

[CharlesTurner]

Thanks for the replies.

[sgl66]

- H on my engine assembled Sept '65.

[6S280]

My '66 Shelby, 6S280, has an engine assembly date of 5H18 and the original alternator is stamped "JUL 20 1965" with the black steel pulley, arched engineering number "C5AF-10A352-H" and blue alternator fan.

[Brant]

Charles,

Like you, I have seen May and June cars (May assembly date engines) with the -C pulley. I've also seen some around the same time with -H pulleys. This period in June 1965 seems to be the "general transition" time.

[sgl66]

What is the difference between the -C and -H?

[CharlesTurner]

What is the difference between the -C and -H?

They are actually physically different.  The -H has a raised 'washer' area made into the reverse base of the pulley.  The -C one is flat on the back, requiring a spacer to be used, depending on which fan is in place.

Additionally, the -C stamping is straight across the face of the pulley whereas the -H is curved.  The -C is usually black, -H usually zinc with dichromate (gold).

[Texas Swede]

I may be worth saying that the C-pulley requires another fan than the H-pulley.
Texas Swede

[CharlesTurner]

I may be worth saying that the C-pulley requires another fan than the H-pulley.
Texas Swede

Thanks, meant to say 'fan' instead of pulley in my post, corrected now.

[jwc66k]

The -C is usually black, -H usually zinc with dichromate (gold).

My '66 Shelby, 6S280, -- arched engineering number "C5AF-10A352-H" and blue alternator fan.

This is in disagreement with "The 289 High Performance Mustang" by Tony Gregory (4th ed, pg 42). He say the alternator pulleys and fans were black until mid 66.
Get your research department activated.
Jim
 

[CharlesTurner]

When the blue fan is used on a hipo, we still usually see a non-painted pulley.  Definitely will try to find more examples.  Unfortunately, I don't put much faith in the Gregory book, several really bad errors in the book, although a lot of the info is good.

[J_Speegle]

The blue fans and pulleys (in some applications) have been found in 65 and 66 production.  They are so rare almost not worth a mention unless your covering every last detail   Of course has nothing to do with the HiPo alternator pulley

No pattern found or purpose found yet that I'm aware. 

[jwc66k]

I have some questions and observations on this topic:
1. Where and when were alternators installed?
2. There was a previous discussion and pictures of a blue alternator fan on a 289 but I think it was for a Dearborn car. The claim was a blue fan on a 66 Shelby which was a San Jose only production. See question 1.
3. Tony Gregory's book is a documentation source, as are the Osborn assembly manuals, the AMK Hardware book, all years service manuals, technical service bulletins and original period photographs. They are certainly better than nothing. If an error is found, discussed and a correction determined, those documents that belong to forum members should be "red-lined" to reflect that correction by forum members. A general statement of "errors" without specifics does nobody any service.
Jim