Thread: SO, THIS looks very wrong.

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2010-09-24 04:02:00

#31

hammerin hank Online/offline status of hammerin hank is unknown

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Originally Posted by BenFenner

From Steve's comprehensive CSK option list:

Rear Option B13

Standard Koni B13 rears- This is your only option for those running lowering springs (such as Hyperco and Road Magnet) on a B13. You can not use any other Koni in the back on a B13 with those lowering springs. It is 1 inch shorter then oem standard so you don’t even need to do any tricks to lower the things. Just install them as the instructions say. They work fine with lowering springs but I don’t pair them with the Maxima fronts. Max spring rate is in the 275# range. Another option for those with lowering spring is to just use AGX's in the back with Koni in the front. The front is the place that we have major travel issue, the rear is not as big of a deal. With a under 1 inch drop you are fine in the back with AGX's with Hyperco. I have no experiance with Road Magnet springs.

So unlike the fronts, you apparently don't want to cut the Koni inserts down any for the rear. I guess they just go in like the Koni instructions say. If they were shortened in the back that might explain the issue?

Additional info from Steve's thread:

"B14 Koni Fronts installed into OEM B13 rear housings- This is what I pair with the Maxima fronts on a B13. This unit is strong and will easily handle your 400# plus rears. It is not externally adjustable. It require a really long bolt (grade 8) a bunch of spacers and it has to be spaced up to be the right height in the back for the GC setups. It can not be used with lowering springs. I struggle with recommending this setup as you need to install these properly or you can really have some issues. Max spring rate is in the 400+ range.

Spec V fronts installed in OEM B13 rear housings- Same info as above. Just externally adjustable and not as strong as the B14 front. Max spring rate is same as front. Around 400#."

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Sounds like someone selected the wrong insert for your setup.

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S62...huh?

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2010-09-24 04:16:19

#32

hammerin hank Online/offline status of hammerin hank is unknown

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Originally Posted by M0J0

So, umm, just wondering, B15 fronts in B13 rears = nono, but B15 fronts in B13 fronts (for rear) is gogo?

With Hyperco's that is.

I ask since I already bought 4 front inserts.

What should I do to make it work?

Sell the springs or sell 2 of the inserts and start over.

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S62...huh?

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2010-09-24 08:24:12

#33

M0J0

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Originally Posted by hammerin
Sell the springs or sell 2 of the inserts and start over.

Originally Posted by obewan

What you need to physically install the b15 in the rear are some spacers to drop into the struts under the inserts and longer bolts. In the past I have used to use shock washers as spacers for struts. I can make the spacers and source the bolts if you need, just PM me.

So would that work or not? Also, will it function properly?

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2010-09-24 11:54:13

#34

Haulin200sx Online/offline status of Haulin200sx is unknown

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wow

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2010-09-24 12:02:08

#35

PhorB13

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Obewan, if we can get together and see where everything actually stands, you might be able to help me salvage the parts. They are still sitting in the hatch of the car, so I'll take a look at them sometime after work.

Again, I really appreciate the input from everyone.

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2010-09-24 12:09:28

#36

hammerin hank Online/offline status of hammerin hank is unknown

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Originally Posted by M0J0

So would that work or not? Also, will it function properly?

You'd have to go with GC coilovers for it to work. Lowering springs won't work properly with the Specv front insert in the rear of the B13. It's either that or you ditch 2 of the inserts you have and get the standard B13 ones, as stated in Steve's write up. He also mentions just running AGX's in the rear. That would be even easier.

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S62...huh?

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2010-09-24 13:29:47

#37

obewan

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Looks like the B13 rears can be special ordered from directly from Koni. None of their dealers list them anymore.

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2010-09-24 13:52:40

#38

M0J0

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But the problem with the B15's in the B13 housings is the shorter space for the springs?

Shouldn't you be able to fix that with some spacers?

Like obewan said:

Originally Posted by obewan
What you need to physically install the b15 in the rear are some spacers to drop into the struts under the inserts and longer bolts. In the past I have used to use shock washers as spacers for struts. I can make the spacers and source the bolts if you need, just PM me.

I just checked the rear Hyperco spring, comparing it with a front spring on a front B13 housing. There's only a few inches of difference, when using the B15 insert.

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2010-09-24 14:09:07

#39

obewan

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A few inches is a BIG difference.

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