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The Strut thread - Koni / Illumina / Tokico / Carrera / Bilstein / Ground Control


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As per my build thread here: http://forums.hybridz.org/showpost.php?p=955824&postcount=4 I'm using torrington needle bearings from motion industries that fit the a1 racing coil over tops. PNs, prices etc in the link. Thats for the a1 racing coil over top and I'm using it with the stock strut top though, not TTT: But I found everything I wanted on the motionindustries.com website. The search thing is kinda retarded, but the part numbers for torrington are pretty easy to decipher, e.g. FNT 1528 is a needle bearing 15mm ID 28mm OD, LS1528 is thrust washer 15mm ID 28mm OD. The FNT and LS prefixes appear constant so you can find whatever size you need hopefully?

 

Myron, it looks like you've got the hat sitting down on the tapered part of the piston? I was going to do this, but decided against it as I wasn't confident thats what bilstein had in mind.

 

Maybe we can go over what I did this Saturday when you help me put it all together. ;)

 

Dave

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I don't have the part numbers but, I used the female and male gland nuts that came with the struts. The female was welded to the housing and replaces the original threads.

 

I did it almost identical to how Dave (thehelix112) did it. Check out his suspension build thread for more info.

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  • 3 weeks later...

On a side note, I just got off the phone with Bilstein Aftermarket & Motorsport, the P30-0032 has internal bump stops, so no need to run them.

 

Also, the dust covers that come with it are too big to fit inside 2.5 coil over springs. I just stuffed them in there figuring the protection from dust damage to the damper was more important than the 0.001lb/in change in rate the compression of the boot involves, and the wear on the steel shaft from the plastic?

 

Dave

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  • 3 weeks later...

How much you can lower the S30 when its still driveable on track?

Guys who have custom coilover or Arizona Z Car set must have measured?

 

I´m putting Tein Flex coilovers to my car and this would help. Off course there will be many other suspension upgrades too.

 

Car doesn´t have to be "lowrider", but i want there is enought adjustment...

 

My body is still in rotisserie and measurement is hard.:icon56:

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  • 1 month later...

Interesting thing I just found. Looks like you can fit a 36mm piston Bilstein into a 280z strut tube :) :)

 

280z strut tube ID: 1.845"

ref: http://sccaforums.com/forums/permalink/274631/276929/ShowThread.aspx#276929

 

36mm 3000gt Bilstein: 1.803"

ref: http://ryanizer.blogspot.com/2008/07/bilsteins-for-s14s.html

 

Now I'm wondering if a HD bilstein is the same internal parts as a sport bilstein since I plan on revalving either one.

 

Regards,

Justin

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P36-0262.jpg

 

Here is a list of possible 36mm Bilstein Inserts that are workable:

 

3000GT R36-5022-HO: Body: 10.47" Min: 14.96" Max: 18.89" Stroke: 3.93"

http://www.allshocks.com/productimages/R36-5022-H0.jpg

 

Z31 300zx P36-0262-H0: body:14" min: 14.5" max: 20.625" stroke: 6.125"

http://www.allshocks.com/productimages/P36-0262.jpg

 

Audi P36-0369-HO: body: 14" min:14.375 max: 20.5 stroke: 6.125"

http://www.allshocks.com/productimages/p36-0369.gif

 

Saab 900 PE3-3093-H0 body: 13.75", min:14.75" max:20.5" stroke:5.75"

http://www.allshocks.com/productimages/pe3-3093.gif

 

Porsche Inserts may also work:

P36-0112, P36-0113, P36-0114, P36-0115

 

 

 

For Comparison, the Bilstein everyone is using currently on Z's:

 

P30-0032-HO, Body: 12.5", Min: 13.98" Max: 19.74" Stroke 5.76"

http://www.allshocks.com/productimages/P30-0032.jpg

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More Info on the 36mm inserts after Talking with Keith at Bilstein 1-800-745-4636.

 

Looks like the problem is the gland nut yet again. They have M48 X 1.5p and M52 X 1.5p. No M51 gland nuts available. I'm going to look into have some M52 X 1.5p threaded tubes made that can be welded to our strut tubes.

 

The M52 X 1.5p gland nut part number is B4-B36-U242-B2.

 

Here is a table showing the factory valving of the inserts I identified in the last post. I'm thinking the 3000gt insert may be workable. According the Bilstein you can cut down the 2.36" internal bump stop to gain some travel.

 

BilsteinWorksheet.jpg

 

The nice thing about these 36mm piston units is the re-valving potential. There are linear and digressive pistons available to use when rebuilding the units.

 

Regards,

Justin

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That Mitsu insert has a LOT of rebound dampening, but as you said, the advantage to these is the 36mm digressive piston, and if you're willing to revalve, then it's no big deal. Checking the previous posts here, John C came up with a body length on the Konis of 13.07", so it might even be possible to use the Saab insert that is 13.75. Not sure if that leaves you with not enough strut housing to section. As to the stroke, Bilstein add spacers for the longer stroke struts. I don't see why a spacer couldn't be added here. There's a broken down Bilstein showing the spacer and bumpstop on this thread from another forum: http://www.theoryinpracticeengineering.com/forum/viewtopic.php?t=85

 

I think 4" might be enough travel for a lot of Z racecars. Stiffer the springs, the less travel is necessary.

 

Another option for the gland nut might be to hog out a male nut that is way too big, weld it to the strut housing, then thread a female nut onto it. Or alternatively, turn threads on a tube which would fit over the strut tube and could be welded on, much like the threaded coilover tubes, but weld on.

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Got off the phone again with Bilstein.

 

Internally threaded M48 X 1.5p gland nut(made for 30mm insert, so you'd have to got it out to work with the larger strut tube diameter: B4-B30-U226-A1

 

Externally Threaded M48X1.5p gland nut: B4-B36-U242-C1

 

Regards,

Justin

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Not following these last couple posts. Are you using my suggestion? Weld the male to the outside of the strut housing and then thread the female onto it?

 

Actually welding the Female threaded gland nut on to the strut tube: B4-B30-U226-A1

 

Then threading in the male gland nut: B4-B36-U242-C1

 

 

I called about the 3000gt gland nut. It is a press fit unit :) I may just be able to use this part if I can make a little sleeve to weld onto the strut tub :) :)

 

I'm going to order my set of 4 X 3000gt inserts today and get this ball rolling.

 

Justin

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You might as well try to figure out the valving you want first, and then have them revalve them before they send them out. That way you wouldn't have to send them back to be revalved.

 

Yeah, I got free shipping on my order through AllShocks.com

 

http://www.allshocks.com/bilstein/html/show_shocks.asp?make=MITSUBISHI&model=3000%20GT&year=1991

 

I'm just going to get them fitted and figured out before I throw money at having them revalved.

 

I'm thinking I'll have them revalved 300/100. My spring rates are 350/375 F/R. What are your thoughts?

 

 

Also, if I can't get the press fit just right, I'm going to make 4 tack welds to hold the gland nut to the strut tube.

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I'm thinking I'll have them revalved 300/100. My spring rates are 350/375 F/R. What are you thoughts?

That's what they were using on the linear ones, I'm not sure how the progressive ones relate in terms of those same numbers. This part of the shock thing is a big question mark to me. Can you move the knee where the pressure digresses? If you can, where should it be? Should you use more rebound since it is digressive, or less? Shock valving is a complex question.

 

I assume you've seen this webpage. It might help a bit to get in the ballpark at least: http://farnorthracing.com/autocross_secrets16.html

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