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951 Scott's Avatar
 
Join Date: May 2010
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Question Need Help / Information for a KONI Upgrade

I am in the process of researching and planning to upgrade my struts and rear shocks to KONI's on my 1986 951 over this upcoming winter....in reviewing the posts on this board I have the found the statements listed below but have also found a similar conflicting statements....WTF????...it seems that there are some varying opinions and statements out here......and since I am going to spend a small fortune on this upgrade I'd appreciate any feedback and clarification.

Thanks again in advance for your feedback.

Scott

1st statement from a post: "Up to 86 Turbos have the non-sealed strut assemblies where you can just replace the inserts"

My Assumption: I can simply install Koni Adjustable insert the 1414's with out the hacksaw method? True or False ?

2nd statement: Bogey Strut off of an 87NA will fit a 1986 Turbo.

My assumption: while they look the same, the bolt holes are slightly different due the the ABS (also the reason the offset if different) on an 87 so they will not fit? Correct ?

3rd statement: regardless of year or whether or not the car is Turbo or Non-Turbo....all rear shocks are interchangeable.

My assumption: I don't have an opinion on this, I am interested more specifically if these rear shocks are compatible between an 87N/A and my 86 951.

Old 10-29-2010, 08:25 PM
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regarding 3rd statement, although all 944/951 rear shocks have a 951 part number and are interchangeable, they are not the same. a 944 rear shock will be too soft/weak for a 951's power at the rear wheels. here are the factory options:

951.333.032.01 koni m474
951.333.032.04 koni turbo/m030 single adjustable
951.333.032.05 fichtel+sachs 944/944s
951.333.032.06 fichtel+sachs turbo
951.333.032.07 fichtel+sachs 944s2
951.333.032.08 koni 944s2 m474
951.333.032.09 fichtel+sachs turbo/944s2 M031

notice that .02 and .03 are missing in the above list? i'm not sure what .02 was, but .03 is the holy grail factory clubsport rear suspension with helper springs for 951:
944.333.032.03 koni M030 double adjustable with spring collar +
951.333.531.31 additional spring M030

notice the 944 part number on this original setup, all rear shocks were changed later to 951.xxx



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Last edited by nize; 10-30-2010 at 10:26 AM..
Old 10-30-2010, 10:11 AM
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so to answer your questions, the factory options you have for 951 rear shocks are:

951.333.032.04 koni turbo/m030 single adjustable *best common option*
951.333.032.06 fichtel+sachs turbo
951.333.032.09 fichtel+sachs turbo/944s2 M031

and if you're lucky or have lots of $$$:
944.333.032.03 koni M030 double adjustable with spring collar +
951.333.531.31 additional spring M030
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'89 turbo-s (2.7, wolf3d ems, garrett dbb turbo, tial 46mm, etc. fast!)

Last edited by nize; 10-30-2010 at 10:21 AM..
Old 10-30-2010, 10:17 AM
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it seems there's another odd duck rear shock:
951-333-032-34 -koni adjustable rear with helper springs
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'89 turbo-s (2.7, wolf3d ems, garrett dbb turbo, tial 46mm, etc. fast!)
Old 01-07-2014, 08:34 AM
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#1: All turbo struts, even the '86's, are of the sealed variety. Your options are to either do the hacksaw method with 1414's or send them out for a rebuild.

#2: The holes are different from NA to Turbo, correct.

If you are in doubt call up Jason at Paragon, as they kind of specialize in 944 suspensions.
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1987 944S - Restored salvage title, ready to live again
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Old 01-07-2014, 11:44 AM
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'89 turbo-s (2.7, wolf3d ems, garrett dbb turbo, tial 46mm, etc. fast!)
Old 01-19-2014, 08:49 PM
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Nize can you tell me which option these Koni part numbers were from. These are on some struts I removed from an 87 951 when one went bad. Part numbers 951 343 031 06 and 951 343 032 06.
Both are labeled KN2.

Thanks
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Old 05-16-2014, 11:58 AM
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Don't use a back saw if you can help it a large tuning cutter work's great go slow and it will give you a nice true cut.
Old 03-22-2020, 10:34 PM
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Great advice on a 6 year old thread...

__________________
NASA/PCA Instructor: '88 951S - with LBE, Guru chips, 3Bar FPR, 1.3mm shimmed WG, 3120 lbs, 256 RWHP, 15 psig boost
1987 924S 944 SPEC racecar - '88 pistons/DME, short 5th
1987 944S - Restored salvage title, ready to live again
I can fix your late 944 Cruise Control module - PM for details
Old 03-23-2020, 07:03 AM
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