I've never measured or cared to measure before, but:

I have a set of very nice, extremely low mile, large dowel Series 5 turbo irons that have been ported in towards the eccentric shaft.

Cursory measuring on a sampling of other irons shows that line is normally 1.500" away from the center hole, +-.005. These irons are cut down to the 1.430 range in spots, but never less than 1.470.

Run away, or cross fingers and use 'em?

 

The limit is the track of the outer oil scraper lip.
If that track is not open to the intake then you still have irons. If the track has been impinged, then the engine will smoke due to oil between the scrapers being dropped into the port.

If it is a race only engine then still no problem. The car will obviously smoke when sitting still but will not be obvious at speed. So, no problem.

Ink up the iron and install a stationary gear. Walk the rotor with outer scraper and spring around the iron to remove the ink with the scraper lip.
Then inspect the area close to the port inner edge to see if the scraper lip was opened to the port. (here should be a thin line of ink left behind) Easy.

Make a mask of thin sheet stock and copy a good port that does not open to the scraper lip. Then lay that mask on the primary ports to check them as well.

Lynn E. Hanover

 

Well, I've only been able to measure the rear plate so far, and the outer oil scraper does just barely cross over it for about 5mm at the very bottom of the port. It only crosses over by maybe a half mm. Other than that, the scraper track is a good 1mm away from the port. It's as if whoever ported it made a slight "oops".

I'm unsure if this is enough to cause significant issue, but it does make me worry about the port edge possibly wearing on the scraper. Side seals are meant to cross over open holes, oil scrapers aren't.

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Curiosity got the best of me. I threw a 12A stat gear in the front plate and, lo and behold, the scraper runs right on the very edge of the port. Any wear at all on the scraper and it would not seal for the entire height of the port.

I guess this explains why I was "gifted" with these! Such a shame, too, as the rest of the portwork is great.

While I've got you on the horn so-to-speak, I pressed some used bearings into a rotor using red Loctite last year, and promptly ignored them. The other day, I washed them, set them on a shelf gear side down, and the next evening, one of the rotors was stuck to the shelf with Loctite. Should I be concerned? I didn't THINK that I was that messy when I put it together. I suppose my question is, should I have used the green bearing-set instead of red?

 

Red is fine. It hardens when it is devoid of air. So if you have a drop of it left over and you did. Laying the rotor down trapped some Locktite, cut off the air, and it cured.

Lynn E. Hanover