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bureau13 · Joined: 07 Sep 2017 Posts: 480 Location: South Florida

So I got a set of Koni Sport shocks to replace the very bouncy worn-out stock shocks that were on the car.

They definitely feel a lot better when I'm driving...however I just noticed that I now have a small protrusion in the lower part of my NACA duct

It appears to line up with the shock top, where I notice there is a part that sticks up higher than the stock shocks. I need to take some pics but haven't got around to it.

Has anyone else noticed this? Oddly, I don't hear or feel any rubbing, and closing the hood seems normal. I need to check if it's still touching or if somehow the hood was closed before the shocks were seated, if that makes any sense...

(Note: I didn't do the install, a shop I sometimes use did it)
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1982 931
1986.5 Silver 928S
2007 Hummer H3 (Daily Driver)

Past lives (I miss them all):
2004 RX-8 (Wrecked)
1993 RX-7 (Sold)
1987 RX-7 Turbo II (Sold)
1985 RX-7 GSL (Stolen)

Carrera RSR · Joined: 08 Jan 2010 Posts: 2309 Location: Somerset, UK

Koni top adjustable shocks?? The metal dial will stick up further than stock an there’s very little room between shock tower and the underside of the naca
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252

Johann · Joined: 07 Aug 2016 Posts: 240 Location: Netherlands

Yup, Koni's and Turbo's don't go together. Your shop created the ding the first time closed the hood.

Cedric · Joined: 27 Aug 2004 Posts: 2608 Location: Sweden

I had to trim down my gaz dampers, they put a little ding in the naca duct after a while.
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1980 924 Turbo
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bureau13 · Joined: 07 Sep 2017 Posts: 480 Location: South Florida

Ugh...is this widely known? I thought these were a recommended upgrade

Is there any reason I can't cut that piece that sticks up from the top of the adjuster (not familiar with the GAZ but it sounds like maybe a similar problem).
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1982 931
1986.5 Silver 928S
2007 Hummer H3 (Daily Driver)

Past lives (I miss them all):
2004 RX-8 (Wrecked)
1993 RX-7 (Sold)
1987 RX-7 Turbo II (Sold)
1985 RX-7 GSL (Stolen)

Carrera RSR · Joined: 08 Jan 2010 Posts: 2309 Location: Somerset, UK

Cedric · Joined: 27 Aug 2004 Posts: 2608 Location: Sweden

Shurick · Joined: 15 May 2005 Posts: 524 Location: Russia, Moscow.

Same here, also have that ding on my duct
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WBR, Shurick
'79 931 -- intercooled K26-3060-6.10 turbo @ 1.2 bar, EFI+EDIS, 951S brakes, stripped interior, 951 look.
'86 924S -- R.I.P.
https://www.instagram.com/ru_pacecar/

bureau13 · Joined: 07 Sep 2017 Posts: 480 Location: South Florida

Maybe we should just consider it a badge of honor. "See that ding? That's 'cause it's got a Custom Suspension!"

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2596 Location: MI

WTF

This has got me thinking now because I have a ding in my duct but I don't think I have konis.. I thought my shocks were original..

This is also the first I have ever heard of this and I have read a LOT of threads here..
If Koni shocks are known to damage turbo cars this should really be more common information..

Can you guys post pics of your duct dings so I can compare them to mine?
I'll post a pic of mine too here in a minute.. (heads out into the tundra under winter storm warning to take pic of duct dent)

Is it there?

My shocks just have an allen socket in the end of them..
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80 Turbo - Slightly Modified

Carrera RSR · Joined: 08 Jan 2010 Posts: 2309 Location: Somerset, UK

Use modelling clay/plasticine etc on your strut top, close the bonnet to see how close they are from hitting. A small adjustment in the bonnet hinges and alignment makes a difference in hitting or not.

Some strut tops could be cut/milled down. Top adjustable Koni's need the nipple for the screw adjusters to turn the inner rebound adjustment. Just don't leave the screw adjuster on the shock and shut the bonnet!!!!!!

I dented the middle of my bonnet due to the non standard location of the throttle body hitting the bonnet when I hit the sump on a kerb!!! Whole engine was lifted 5-10mm which was enough to make contact and crack the paint on the top side. Very annoyed and had to repaint the whole bonnet
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252

Kenodog · Joined: 25 Jun 2003 Posts: 2651 Location: Vancouver,B.C.

Crazy, you learn something new every day. In 17 years of these cars I had no idea those dings were caused by Konis. What fortuitous timing as well because I just installed a new set on Sabine but have not put the hood on yet so she was spared the ding. Normally I'm a Bilstein guy but I got these Konis in a parts lot so figured I would just use them....silly Konis.

ME
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1979 Euro 931, Olive
1981 931, Sabine
1991 Ford Ranger XLT 4x4, Ricky
1996 Ford E-350 ex-FedEx Van
2014 Mazda CX-5 (Kinderwagon)
2019 KTM 790 Adventure
2024 KLX300
2024 KLX140