Julian date for master cylinder for 69 corvette

[Michael L.]

Re: Julian date for master cylinder for 69 corvette

Mark
It sounds as though you are ordering up a new (old) MC and you can specify the date embossed on it. I wish I knew how you can do that. Aren't you hoping to find an old used MC with some julian date that fits your cars build date? If so, you should try to find one made in the (9)270 to (9)325 julian number range, but anything from (9)150 to (9)328 fits NCRS parameters. Your original MC could have been dated just a few days before your car's 11/25 build date but just as likely could have been dated up to two months before. So, there is a range of julian numbers that will work for you. It should not be that confusing.

For clarification per Mark's question above, does anybody know where a new/rebuilt date coded MC can be purchased?

Mike

[Michael L.]

Re: Julian date for master cylinder for 69 corvette

For clarification per Mark's question above, does anybody know where a new/rebuilt date coded MC can be purchased?

Mike

To answer my own question, here is a link I found to Eckler's that lists a correct date coded new MC. You provide them with your VIN and they then date code it correctly.

Mike

http://www.ecklerscorvette.com/1969-corvette-master-cylinder-power-brake-date-coded.html

[Terry M.]

Re: Julian date for master cylinder for 69 corvette

Interesting. So changeover of the line did not occur until after that. I wonder if that was simply to satisfy demand or some other reason.

The delay in 1970 MY production for Camaro & Corvette is often attributed to the 1969 work stoppage, and the accompanying need to fulfill sold orders. I have spent quite some time researching the automotive and business press of the time and I have been unable to find anything in print to justify the extended 1969 model year. Nothing about the strike or any other reason.

No Corvettes were produced from April 10 to June 8, 1969. That is a total of 42 work days exclusive of Saturdays and Sundays. I believe a holiday for Easter/Good Friday would have been in there somewhere, but I did not account for that.

The extended production run went from August to December 18. That is substantially more than 42 days, actually it is more than double the 42 days of lost production even allowing for Labor Day and Thanksgiving. They did produce cars on some/most Saturdays in that extended run, so the extended time more than made up for the production lost. I don't believe for a minute the "strike" story, but I can not provide an alternative answer.

[Terry M.]

Re: Julian date for master cylinder for 69 corvette

To answer my own question, here is a link I found to Eckler's that lists a correct date coded new MC. You provide them with your VIN and they then date code it correctly.

Mike

http://www.ecklerscorvette.com/1969-...ate-coded.html

There are a number of vendors supplying new date coded master cylinders. I have regularly seen an ad in The Driveline. My guess is that they all come from the same source, but I have no idea who that source is. My advice is to shop price and quality of service.

[Patrick H.]

Re: Julian date for master cylinder for 69 corvette

To answer my own question, here is a link I found to Eckler's that lists a correct date coded new MC. You provide them with your VIN and they then date code it correctly.

Mike

http://www.ecklerscorvette.com/1969-...ate-coded.html

I believe that cssb is the company that actually developed them:

http://www.cssbinc.com/delco-master-cylinders-corvette.aspx