Ok here's my first post, nice forum by the way. I've been reading all I can on this forum to get more familiar with the koni's I want. Here's what info I've gathered so far for the rear and was looking for some advice, this is a cut & paste from a pm I sent a fellow Z31 autocrosser.
"Ok after talking directly to Koni this is what I've found out. Take a look at my chart
KONI SHOCKS____8042-1026SPORT(DBL.ADJ.)____8042-1134SPORT(DBL.ADJ.)
MAKE___________FORD MUSTANG 87-93________FORD MUSTANG 94-04
STROKE MAX_____519MM/20.43IN_____________501MM/19.72IN
STROKE MIN______315MM/12.4IN______________372MM/14.64IN
STROKE LENGTH___204MM/8.03IN______________129MM/5.07IN
ROD SIZE_________12MM/.47IN________________12MM/.47IN
STOCK SHOCK (INFO FROM FSM)
MAKE_________NISSAN 300ZX NA 1988
STROKE MAX_____609.3MM/23.99IN
STROKE MIN______392.5MM/15.45IN
STROKE LENGTH___216.8MM/8.54IN
ROD SIZE_________12.5MM/.492IN
Based on these number I think the 8042-1026sport would be a good choice for my car since the stroke is within .50" of the stock shock. It will allow for a 3.56" drop in total height of the shock, remember this is the height of the shock not the car. The height of the car depends of the spring rate and how high the coil is adjusted when loaded. This just means to me that when I jack the car up I'll have less distance to go before the wheels lift off the ground. Now in the case of the 8042-1134SPORT I think the stroke is just too short. Causing the inside rear wheel to lift when in a hard turn when the front outside wheel gets loaded, correct me if I'm wrong. Also Koni already makes the coil sleeve, top and bottom hats to make these a true coil over shock. The koni rep did tell me that these shocks would hold the 500-700lb springs I asked about, so no re-valving need for that range at least." end of pm
For the fronts I was planning on using some koni 8611-xxxx inserts. Because my car has front McPherson struts I was told that I had to remove the insert in order to adjust the compression adjuster. Being the mechanical design eng. that I am I decided to try a make a right angle worm or bevel gear that would attach to the bottom of the 8611 insert and act as a way to adjust the compression adjuster without removing the insert from the strut. I would drill a hole at the lower part of the strut giving me access with a screw driver to the right angle driver which would turn the compression adjuster. I like the front height of my car currently with it's MSA springs and Tokico hp inserts but the rear springs have sagged over time to the point that I hit the stock rubber bump stops on my MSA spring/tokico hp shocks in the rear. My idea in the front is to get a 8611 insert close enough to the stock insert in stroke/height but still allow for the adjuster contraption to fit without having to section the strut.
Initially I was going to swap the front strut with some s14 spindles and 5-bolt hubs and use some ots s13/14 shocks (stance) front and rear. That is until I found more info on the koni 8611 series. Any insight would be greatly appreciated.
Thanks
Jimmie
"Ok after talking directly to Koni this is what I've found out. Take a look at my chart

KONI SHOCKS____8042-1026SPORT(DBL.ADJ.)____8042-1134SPORT(DBL.ADJ.)
MAKE___________FORD MUSTANG 87-93________FORD MUSTANG 94-04
STROKE MAX_____519MM/20.43IN_____________501MM/19.72IN
STROKE MIN______315MM/12.4IN______________372MM/14.64IN
STROKE LENGTH___204MM/8.03IN______________129MM/5.07IN
ROD SIZE_________12MM/.47IN________________12MM/.47IN
STOCK SHOCK (INFO FROM FSM)
MAKE_________NISSAN 300ZX NA 1988
STROKE MAX_____609.3MM/23.99IN
STROKE MIN______392.5MM/15.45IN
STROKE LENGTH___216.8MM/8.54IN
ROD SIZE_________12.5MM/.492IN
Based on these number I think the 8042-1026sport would be a good choice for my car since the stroke is within .50" of the stock shock. It will allow for a 3.56" drop in total height of the shock, remember this is the height of the shock not the car. The height of the car depends of the spring rate and how high the coil is adjusted when loaded. This just means to me that when I jack the car up I'll have less distance to go before the wheels lift off the ground. Now in the case of the 8042-1134SPORT I think the stroke is just too short. Causing the inside rear wheel to lift when in a hard turn when the front outside wheel gets loaded, correct me if I'm wrong. Also Koni already makes the coil sleeve, top and bottom hats to make these a true coil over shock. The koni rep did tell me that these shocks would hold the 500-700lb springs I asked about, so no re-valving need for that range at least." end of pm
For the fronts I was planning on using some koni 8611-xxxx inserts. Because my car has front McPherson struts I was told that I had to remove the insert in order to adjust the compression adjuster. Being the mechanical design eng. that I am I decided to try a make a right angle worm or bevel gear that would attach to the bottom of the 8611 insert and act as a way to adjust the compression adjuster without removing the insert from the strut. I would drill a hole at the lower part of the strut giving me access with a screw driver to the right angle driver which would turn the compression adjuster. I like the front height of my car currently with it's MSA springs and Tokico hp inserts but the rear springs have sagged over time to the point that I hit the stock rubber bump stops on my MSA spring/tokico hp shocks in the rear. My idea in the front is to get a 8611 insert close enough to the stock insert in stroke/height but still allow for the adjuster contraption to fit without having to section the strut.
Initially I was going to swap the front strut with some s14 spindles and 5-bolt hubs and use some ots s13/14 shocks (stance) front and rear. That is until I found more info on the koni 8611 series. Any insight would be greatly appreciated.
Thanks
Jimmie
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