I just received my latest pair of MSD-2013 injectors.  Interestingly, the number that's labeled on the injectors is different from the ones that I'm currently using.  Internet searches don't really say what's up with these numbers, but at least there's hope that this set will flow a little closer to 525 cc/min. 

Old number (currently installed)- 8132 17104487

New number (just received)-  6253 17113738

If you have these injectors (Al, David, ???) can you look at yours to see what the number is?  Obviously, this isn't worth disassembling anything to get to, but if it's readily accessible, I'd be interested, particularly for Al's injectors, since he's actually running with them.  The number is written on the end of the fat part of the injector, on the same end as the plug. 

Thanks,

Rusty

Rusty;

Mine are a couple of years old and are numbered – 4170 171004487.

Same number; different prefix.  My guess is these number are some sort of manufacturing batch and/or sequence number, and have nothing to do with flow rate, and any 2013 injector should give the same flow.

Al