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Richard Casto |
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Blue Sky Motorsports, LLC ![]() ![]() ![]() Group: Members Posts: 1,465 Joined: 2-August 05 From: Durham, NC Member No.: 4,523 Region Association: South East States ![]() |
I am about to pull the trigger on a 911 front suspension. It is billed as being from a 72-74 911S (no the aluminum calipers are gone and I will be using regular A calipers instead) as it has KONI struts with the 3.5” spacing. Ultimately I am looking to install KONI Sport (aka Yellow) struts that have the adjustment knob on the top. I have read a few quality threads such as…
http://www.914world.com/bbs2/index.php?sho...c=390&st=20 This answers a lot of questions, but that thread mostly talks about Boge struts, spindle mods, etc. and doesn’t 100% clear up a question I have about KONI insert compatibility. My confusion comes from the KONI application guide http://www.koni-na.com/pdfcatalogs/2007applguide.pdf (approx 1 MB PDF). If you don’t want to look at the PDF here is a summary of the KONI document … 65-68 911 Boge strut 86-1394 Classic KONI strut 86-1308 Classic 69-74 911 Boge strut 8641-1039 Classic KONI strut 86-1638 Classic 75-89 911 Boge strut 8641-1039 Special KONI strut 86-1942 Special (footnote) 8641-1039 Sport 914 and 914/6 All (Boge?) 8641-1077 Sport To translate KONI types, Classic = “Black”, Special = “Red” and Sport = “Yellow”. The implication is that "it appears" that you are really limited if you want to use the “Sport” insert as they only list the “Sport” strut for the 914 and 914/6 as well as for the 75-89 911 (but with a cryptic footnote). The 911 footnote says… “Ext. adjust Sport alternative (both Boge and KONI) for OE KONI struts, gland nut 73.25.01.011.1 must be ordered separately” My confusion/questions…
One last thing… I have tried to document everything that I have learned on the 914 Wiki. Please feel free to look at that article and if you think you know what you are talking about, correct any mistakes. http://www.roadglue.com/wiki/index.php/911_front_suspension |
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Eric_Shea |
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PMB Performance ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Admin Posts: 19,278 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains ![]() ![]() |
QUOTE Didn't the 3.5 spacing come on the later cars? I thought they had only the 3" spacing up to 74. I could be mistaken, it's happend before. 3.5" began in 1969 with the first Koni strut and S-Calipers. I have fairly early (still have the late model ball joint pins though) Koni struts on both of my cars. Both have had the spindles raised. I say this because on a Koni strut, you have a reduction in the tube where the spindle slips on. You can literally only raise it 18mm before you hit the flare. Boge's are different. A 911 Boge strut is basically the same as any 914 Boge strut except the spindles are beefier on the 911 variety. The main difference between the two is the fine (Koni I believe) threaded top and a more coarse threaded top on the Boge. That and the caliper mount spacing of course.. the Koni and Bilstein struts have the 3.5" mounts. I'm no expert on this but, from working with mine, that's what I saw. If you are planning on buying Koni's new, you may want to have them special ordered with the 914 valving. It's not "that" much different (only the high-speed rebound is different from what the Koni engineer told me) but it may make a difference. Here's a bad picture that shows the difference in the tube (that old camera was actually dying Aaron... so don't post the flower icon macro bla,bla,bla (IMG:style_emoticons/default/biggrin.gif) ): Attached image(s) ![]() |
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