Is this Koni acceptable for track use?, 72-73 Red self leveling Options

[MikeSpraggi]

I have a pair of 72-73 911 "Koni only" struts with 3.5" SC calipers. The only Koni inserts I can find for them are sefl-leveling "reds". I am thinking of installing these on my track car that will be used for DE events for the foreseeable future. What is this "self-leveling" system these shocks use? I take it they are not adjustable shocks.

Will these shocks give me acceptable performance when pushed hard on my 1970 teener with 2.2 six semi-race engine? Koni "reds" will also be in the rear. Thanks.

[Richard Casto]

One reason I listed my part numbers on my struts is because I think they are newer (74-77?) and may be a different part number than the earlier struts the OP has.

At the bottom on the struts, there is a section where it necks down to a smaller diameter. I may be making this up. (IMG:style_emoticons/default/smile.gif) But I "think" I remember something about how some of the Koni inserts didn't fit due where the neck is located. That to make this fit some shaving of the insert was done, but that this weakended the insert and was no longer recommended. And that later inserts have a different design to deal with the neck location. For example it's my understanding that the 914 specific insert will not fit into my strut due to this, but that the "newer" 911 insert (which I have) does fit. Or I may be confusing the issue I remember with the one you are describing.

Persoally if it turned out that this particular strut only allows a Koni Red, I would probably not use it and get either a Boge (which allows more insert options) or maybe a newer Koni strut like I have.

I would call either Koni directly (they have a Tech line in which I have had good experience with questions like this) and/or Jason at Paragon Products to determine what really fits into that particular strut.