It has come to my attention that the latest 61-62 judging manuals are specifying only documented original date codes on aluminum surge tanks and that any other stamped date will be considered incorrect. I have a copy of the above manual but I do not have one covering the title range. Can anyone help me obtain the pages for this so we can get on the same page with current judging? Scan and send to tadewitt@dewitts.com please.
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Re: 63-67 & 68-72 Surge Tank date codes
Can I get an Amen?!?!Leif
'67 Coupe L79, M21, C60, N14, N40, J50, A31, U69, A01, QB1
Top Flight 2017 Lone Star RegionalComment
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Re: 63-67 & 68-72 Surge Tank date codes
Not that you asked, but in the same spirit, I'll report that '65 #23561 (4th from the end) has a '65D tank.Comment
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Re: 63-67 & 68-72 Surge Tank date codes
So does this mean the tanks LIC sells for C2s are OK, or not?Big Tanks In the High Mountains of New MexicoComment
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Re: 63-67 & 68-72 Surge Tank date codes
What an EPIC TRANSITION in logic! A report to Dewitt beyond his request about A TANK on a very late '65 - intended to encourage his gathering of such information - to an endorsement of LIC repro tanks? Really? Many potential comments present themselves....none are worthy...Comment
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Re: 63-67 & 68-72 Surge Tank date codes
I admit I am confused about a thread that is titled "63-67 & 68-72 Surge Tank date codes", a first post that wants info from the new 61-62 judging manual about a new requirement, and then a comment about a late '65 Corvette with a 65D date code.Big Tanks In the High Mountains of New MexicoComment
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Re: 63-67 & 68-72 Surge Tank date codes
OK, let me try to understand what is the issue here. I have judged quite a few C2s over the last few months as a chassis judge, and the TIM&JGs are all almost identical about the tank dates, they say: "....and coded date of manufacture stamped into the inboard side below the embossed "Harrison" name. The date code is in YYM format and must precede the assembly date of the car. Example 66D= April 1966 or 67D=April 1967, etc." I am assuming the six month rule before build date of car applies here, that is the way we judge it.
Now, what does this new language in the '61-'62 TIM&JG mean if it says what the OP indicates: "....are specifying only documented original date codes on aluminum surge tanks and that any other stamped date will be considered incorrect." That is why I asked if the ones (reproductions with stamped dates that fit the 6 month rule) many of us have obtained from various sources are good or not, since there has been no change in the TIM&JGs language of this for the C2s that I know of. Thus my confusion.Big Tanks In the High Mountains of New MexicoComment
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Re: 63-67 & 68-72 Surge Tank date codes
I will speak to the 61-62 JG. The insertion of the months that Harrison manufactured and stamped tanks versus the months they did not was a result of the 40 years of studying and recording original 61s and 62s that I have done, with input from reliable NCRS friends. I don't know if anyone has done that for 63-69 and 68-72. I'm guessing that someone has studied those also, and hopefully their observations will be inputted here to assist Tom in reproducing only those dates which align with original Harrison production.Comment
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Re: 63-67 & 68-72 Surge Tank date codes
Mike,
Just to be clear for those of us who can be slow, what you're saying is if research were to show that no original or Bowtie '66 cars had a 66D surge tank date code, then my July build date '66 shouldn't have a 66D date coded surge tank (say from DeWitts) even though 66D is well within the 6-month prior window for my car?
GaryComment
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Re: 63-67 & 68-72 Surge Tank date codes
I would think the GM's buys were as hose clamps were only the 1st an 3rd quarters. So assuming only certain months where purchases made. Thus if you had a non GM purchase month back in the 50's and 60's then ....... deduction.
I have never seen a month list of the purchases for H2O tanks. Does one exist?Comment
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Re: 63-67 & 68-72 Surge Tank date codes
Certainly a novel concept, but since we know they also did this with Holley carbs (and other things) too, and reproduction date stamps put on them may not reflect the batches that were made, but since we do not always have/know the various year's batching months, then it would seem to be more trouble than it is worth to guess at it all for deductions. In other words, why sweat this detail on any Corvette?Last edited by Michael J.; December 3, 2016, 04:19 PM.Big Tanks In the High Mountains of New MexicoComment
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Re: 63-67 & 68-72 Surge Tank date codes
Gene,
If the data in Nolan Adams' book that he obtained from owners reflects originality, GM did not buy surge tanks quarterly. For example, Noland's info from '67 owners lists surge tank code codes (just showing those for Jan and newer here) of 67A, 67B, 67C, 67D, 67E, 67G. No 67F, but only 25 cars are listed from Jan-July, so it could be just too small of a sample.
GaryComment
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Re: 63-67 & 68-72 Surge Tank date codes
Gary,
You are far from slow, and you nailed it. The 6-month rule is, as you know, a bit of a catch-all rule. In this instance, for 61-62, we are so confident of our research on these that we know what months Harrison produced and date-coded, and what months they did not. The 6-month rule is still applicable, but just "pick a date a couple of months before your build date" isn't necessarily accurate.Comment
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Re: 63-67 & 68-72 Surge Tank date codes
OK, I don't do C1s, but it appears official that the '61-'62 TIM&JGs will then publicly specify what is "accurate" and what is not, right, and the deductions for having a reproduction stamped for a no-no date code? That clears up '61-'62, but again, I have heard of no impending changes for the C2s to show "accurate" months and "inaccurate" ones, correct me if I am wrong team leads, if there are, then people should be warned well ahead of any new rules on this, and present the documented research that proves it, to avoid wasting money with LIC, DeWitts, etc.Big Tanks In the High Mountains of New MexicoComment
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