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prostangrr 04-23-2011 06:32 PM
engine ID
 
Can someone tell me what the prefix (PA or PB ) means on the sequential ID numbers ?

289ACE 04-23-2011 07:49 PM
I've been trying to find out the same thing for many years. Hopefully someone will chime in with an answer.
Jay

RICK LAKE 04-24-2011 05:06 AM
Try the FE forumn
 
Guys there are about 10-15 guys who will have the answer for you. Rick L.

Dan Case 04-24-2011 07:27 AM
So far, our group has not figured out the letters other than the sequential serial number.

So far, many known original Cobra blocks have a "P" stamped on one of the two tooling bosses on the left hand side. Many engines are stamped either "PA" or "PB". Sometimes the P is on the number pad and sometimes not. When found alone the P can be rotated just about any direction. Sometimes SAI included the alpha characters in the engine number on the sales papers and sometimes they didn't.

Original foot box data plates got stamped with, in addition to the numeric serial number, no alpha letters, PA, PB, P, AB, BA, and A that I have photo documented so far.

The alpha letters must have meant something to somebody on the engine machining and assembly lines but beyond that it is just speculation.

A-Snake 04-24-2011 08:51 AM
Quote:
Originally Posted by Dan Case (Post 1124797)
So far, our group has not figured out the letters other than the sequential serial number.

So far, many known original Cobra blocks have a "P" stamped on one of the two tooling bosses on the left hand side. Many engines are stamped either "PA" or "PB". Sometimes the P is on the number pad and sometimes not. When found alone the P can be rotated just about any direction. Sometimes SAI included the alpha characters in the engine number on the sales papers and sometimes they didn't.

Original foot box data plates got stamped with, in addition to the numeric serial number, no alpha letters, PA, PB, P, AB, BA, and A that I have photo documented so far.

The alpha letters must have meant something to somebody on the engine machining and assembly lines but beyond that it is just speculation.
I would add that additional numbers have been found stamped on the other engine bosses.

tnewland 04-24-2011 09:35 AM
It is believed that the extra letter prefixes stamped are inspectors or inspection processes that the block had passed during testing to become a hipo block.

289ACE 04-24-2011 01:31 PM
Quote:
Originally Posted by tnewland (Post 1124812)
It is believed that the extra letter prefixes stamped are inspectors or inspection processes that the block had passed during testing to become a hipo block.
Does this mean all HiPo blocks carry the letter designations on them? A few years ago I ask Bob Mannel if he knew what the PA code meant and he said he no data on its meaning.

Jay


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