Ground control + koni shock boot reccomendations?
 

Hello,

I was just wondering if anyone had any shock boot brand / model number recommendations for the ground control + koni combo. I know people say to use 4x4 boots, but I just got done buying a set from summit racing and they didn't fit. I know they need to be skinny, like 2-2.5" wide to fit inside the gc springs but shock boots I've been able to find are bad about not listing physical specs :(
The problem with my boots from summit is that they were too wide (on the order of 3") so they wouldn't fit inside the gc springs.

Any reccomendations are appreciated. Any reccomendations with a suitable built in bumpstop are 2x appreciated :D

Lane

The second set of boots look like they fit but I'm unsure how they would fit onto the ground control set-up.

https://www.rx7club.com/showthread.p...ground+control

Good suggestion, but later in the thread somebody asks if they will fit on a setup like mine and the author posts this link which shows the OD of the boots = ~ 3"

http://www.energysuspensionparts.com...FQk65Qodciqexg

I need the boot OD to be less than 2.25" :'(

Thanks for the suggestion though!

Lane

Exciting news kids. I found a boot and bumpstop that fits like it was made for this combination:

KYB SB108
KYB SB104 will also probably work. Supposedly its bumpstop is a little shorter. I bought the SB108's to be on the safe side.

http://i917.photobucket.com/albums/a...lfspec/622.jpg
http://i917.photobucket.com/albums/a...lfspec/623.jpg

The boots are very narrow and fit perfectly inside the tiny GC springs. The bumpstops are separate and lock into the boots via a lip system.

http://i917.photobucket.com/albums/a...lfspec/624.jpg

The bumpstop can be pushed over the Koni's flared mount stop, but it grips very tightly. An added bonus is that the boot isn't floppy but rather pretty stiff and it can support itself and the bumpstop without any problems. So even if the bumpstop tried to slip down the Koni's flared stop section, the boot would hold it up. The bottom of the boot fits the shock body perfectly. So perfectly that it slides around the shock body and is still skinny enough to fit inside the threaded sleeve!

http://i917.photobucket.com/albums/a...lfspec/625.jpg
http://i917.photobucket.com/albums/a...lfspec/626.jpg

My only concern right now is that the bumpstop may be a little long and would benefit from trimming. The shock arm normally stops when being compressed at the flare section. The bumpstop holds on to the flair and extends down and past the flair ~ 1" That sounds like a pretty decent length to me, but I don't know how much travel I'm going to have when I get the car at a ride height I like. Any thoughts?

Lane

PS
Oh yes. I verified something else today. The GC coilover kit comes with two different pairs of threaded sleeves. There is absolutely no instructions for which sleeve pair goes on the front shocks and which sleeve goes on the rear shocks. So.... of course I did it wrong. The result was a very low front end even when I'd maxed out the adjustability of the threaded collar and a high rear end. I've driven the car like that (only ~ 1.5 miles total) since I put them on almost a year ago, but I've always suspected that was the problem. Well today I found my suspicions were correct.

If your collars look like this on your front shocks, you're doing it wrong and are doomed to do what I had to do and take out your whole suspension and swap collars with the rear.

http://i917.photobucket.com/albums/a...lfspec/627.jpg

The right way for it to look is that you should not be able to see the yellow of the shock poking above the collar.

Nice posts, thanks for the info!

You're welcome :)

Lane

so how is the ride compare to stock suspension or other coilovers? i been interested for a while to get this set up instead of stiff coilovers (power by max, stance, ect or even tein)

I can't comment on that really. For 1, I bought the car as a roller and didn't ever get a change to drive it one stock suspension. 2 - I've only driven the car under its own power about 2 miles after more than 2 years of work. Currently its on jack stands :D

I'm hoping I'll know more after a few more weeks

Here's my ongoing build thread if you're interested:

https://www.rx7club.com/v-8-powered-rx-7s-299/mississippi-fd-383ci-forged-ls1-stroker-build-971046/

Lane