marc wiese wrote:

The 91 NT also had teflon coated rotor edges between the side seals and

the

edge of the rotor, and maybe the face (I scraped most of it off while
cleaning the carbon off). And you CAN use the 93+ button side seal

springs

(as I did) on the earlier models. Better spring bearing area than the

thin

wire springs. There are NO 3mm apex seals to my knowledge at all in the

13B

stock engines, but I haven't seen everything!

George Lendich wrote:

The very early 13b engines when they first came out, had 3mm apex seals.
It would appear that the engineers were concerned with the apex seals
standing up
with less than 3mm. When they were more sure of the capability of the apex
seals
they reduced them to 2mm on the later released 13b's.
George (down under)

 
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