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-   -   Fat Cat Bumpstops Halp (http://www.mazdaspeedforums.org/forum/f12/fat-cat-bumpstops-halp-78035/)

posty 04-16-2011 05:30 AM

Fat Cat Bumpstops Halp
 
Installing some FSDs today, and I noticed the FatCat rear bumpstops I have are a smaller diameter than the stock bumpstops, so they won't stay in the upper mount.

What have people done to remedy this? I know the FatCats are recommended a lot, so I figure someone has dealt with this.

EDIT: I picked up a 1 1/2" ID "quik pipe" coupler and will try that.

http://tapa.tk/mu/a6890b98-9ace-105a.jpg

http://tapa.tk/mu/a6890b98-9b14-44b5.jpg

posty 04-16-2011 02:11 PM

Ok so I got the FSDs all installed today without too many problems.

The flexible PVC coupler was an awesome buy, I was able to use the single coupler for all 4 bump stops.

Pic of the coupler (get a 1 /12"):

http://lh3.googleusercontent.com/pub...YV9Cs3g2oypfAX

Here are some pics of using it:

http://i.imgur.com/yioBB.jpg

Top mount for rears

http://i.imgur.com/e1fZo.jpg

Rears mounted

http://i.imgur.com/xQBpj.jpg

Front bump stop

http://i.imgur.com/SuNyY.jpg

Front again

ScarMS3 04-16-2011 02:21 PM

That camera doesn't like your skin and fingernails, good job on rigging it up proper

posty 04-16-2011 02:22 PM

Quote:

Originally Posted by ScarMS3 (Post 812327)
That camera doesn't like your skin and fingernails, good job on rigging it up proper

Haha - the camera was awesome, I just used a shitty resizer app.

karl-hungus 04-16-2011 06:20 PM

you fancy moutherfucker.

http://i619.photobucket.com/albums/t...us97/002-1.jpg

dan7225 04-16-2011 07:20 PM

anybody decide to ditch the rear shock covers in the back and use shock boots instead?

what did you use for a shock boot on the fronts?

i ditched the front yellow thingy because it limits almost a 1/2" of travel.

posty 04-16-2011 07:43 PM

Quote:

Originally Posted by dan7225 (Post 812590)

what did you use for a shock boot on the fronts?

i ditched the front yellow thingy because it limits almost a 1/2" of travel.

I used the original boot, just zip tied it to the strut at the bottom

Design 04-16-2011 09:08 PM

Nice retrofit OP.

dan7225 04-22-2011 10:13 AM

Quote:

Originally Posted by posty (Post 812635)
I used the original boot, just zip tied it to the strut at the bottom

I did the same but the oem shock boot is so much bigger around than the strut housing it kind of looks like crap with it all bunched up.

i completely removed the front bump stops, so i might go back in one day and put in some small bump stops and shock boots to clean up the look.

same for the rear, the bilsteins come with a paper thin shock cover that will eventually crack. the oem shock cover is a much sturdier piece but will not fit over the bilstein shock body because it is a larger diameter than oem.

i also dont care too much for the way the oem style shock covers are held up by the bump stops. it eats into the bump stop after a while and wears it out.

Shaikh@FatCat 06-14-2011 12:17 PM

Great improvement! I'm going to link to this thread on our site.

karl-hungus 06-15-2011 02:47 PM

mine are still holding with the gorilla glue. thanks for taking my call when i was installing them, shaikh.

posty 06-15-2011 08:51 PM

Quote:

Originally Posted by Shaikh@FatCat (Post 894696)
Great improvement! I'm going to link to this thread on our site.

Awesome! I replaced the images with less-artifacted versions of more reasonable size!

Cheers!

heeltoe 09-17-2011 07:46 AM

Quote:

Originally Posted by dan7225 (Post 812590)
anybody decide to ditch the rear shock covers in the back and use shock boots instead?

what did you use for a shock boot on the fronts?

i ditched the front yellow thingy because it limits almost a 1/2" of travel.

i used the stock front boot and the yellow bottom cover and drilled the hole bigger and everything fitted like stock just straight bolt on.

SKiZ0TT 09-19-2011 09:07 AM

Quote:

Originally Posted by heeltoe (Post 1047295)
i used the stock front boot and the yellow bottom cover and drilled the hole bigger and everything fitted like stock just straight bolt on.

I did the same for my Koni Yellow / Eibach setup.

theurgy 10-02-2011 02:31 PM

I just wanted to say thanks for the tip, I figure I will post another tip.
Since Canada doesn't have an Ace Hardware, I was still able to find these at my local Home Depot under the Pro-Connect by NCI Marketing brand name.
Got the 1-1/2" x 1-1/2" Flexible Coupling.

I figure this is a pretty generic part but I wanted to post up how easy it was for me to find this piece.

Finally, you say you used one of these for all 4 stops.
I take it you used the ends for the rears... how much did you cut them at?

I also figure you used the inner part of that coupling to put on the front mounts.
It looks like you cut out a 5mm strip, what did you use to cut it?
Just a sharp exacto knife? Hack saw? Dremel?

karl-hungus 10-02-2011 02:33 PM

you may not have ace hardware in canada, but you got tradition.


theurgy 10-02-2011 04:09 PM

Can't deny it... that's how we roll here in Canada.

posty 10-02-2011 07:20 PM

Quote:

Originally Posted by theurgy (Post 1068344)
Finally, you say you used one of these for all 4 stops.
I take it you used the ends for the rears... how much did you cut them at?

It looks like you cut out a 5mm strip, what did you use to cut it?
Just a sharp exacto knife? Hack saw? Dremel?

Yes I used the ends for the rears, just cut them to fit the depth of the mount, use half of the remainder for the fronts.

A simple razor blade will do nicely.

theurgy 10-05-2011 03:28 PM

Just installed these yesterday... holy crap I have to say I'm glad I picked up these bumpstops. All 4 of my stock bumpstops were finished. (Pics coming later).

theurgy 10-05-2011 07:05 PM

As promised:

New FatCat Motorsport bumpstops:
http://i1084.photobucket.com/albums/...y/e690c6a1.jpg

Old completely finished stock bumpstops:
http://i1084.photobucket.com/albums/...y/3e8638be.jpg

Manny 10-05-2011 10:02 PM

sweet yellow sock

theurgy 10-05-2011 10:37 PM

lulz... that's my girl's

SKiZ0TT 10-06-2011 07:29 AM

Those bump stops :eek2:

S-hendrix 12-27-2011 09:39 PM

Great post. Will be using this when my fat cats arrive.

mrdouble99 01-07-2012 12:37 PM

Can they be use on stock shock ?

SKiZ0TT 01-23-2012 11:55 AM

Question:

I have the FatCat rear bumpstops, and with a larger person in the back seat (225lbs) i get some really nasty rubbing over long / short dips in the rear.

Can this be alleviated by going to the stock length bump stop? I do have rear camber arms...

karl-hungus 01-23-2012 12:00 PM

why you making the wife ride in back? jk.

fat cat rear bump stops are shorter than oem so you'd get even more rubbing with the latter.

theurgy 01-23-2012 12:17 PM

http://www.rufkm.net/wp-content/uplo...ks-290x300.jpg

SKiZ0TT 01-23-2012 12:42 PM

Quote:

Originally Posted by karl-hungus (Post 1223376)
why you making the wife ride in back? jk.

fat cat rear bump stops are shorter than oem so you'd get even more rubbing with the latter.

lol wife..

http://legacy-cdn.smosh.com/smosh-pit/112010/alone1.jpg

I was thinking since the OEM bump stops are longer that they would not rub as much since it would be more length to go through before the rubbing..

theurgy 01-23-2012 12:47 PM

I would suggest instead to get your rear fenders rolled.

SKiZ0TT 01-23-2012 12:51 PM

Ugh.

Dano 01-23-2012 12:51 PM

The oe stops are actually designed as part of the rear spring rate. Shorter stops will reduce said rate and more rear squat will occur

I am assuming OP is rubbing tire in the back. Most guys run oe stops in rear and GC or FCM in the front only which is what I run.


Tappin

irishking03 09-02-2012 02:54 PM

Nicely done!

MattJackson86 09-08-2012 09:45 PM

I have bilstein sports with the fatcat stops upfront & OEM in the rear. With even one person in the back and or some luggage I rub over dips in the road. I rolled my rear fenders a tad so I am no long hitting metal, but the tire still hits the plastic fender liner on dips. Sounds terrible when driving, but no damage to tire so far, just some worn down plastic.

alextheguineapig 08-26-2013 04:25 PM

So I don't mean to necro-bump this thread, but I'm ordering Koni Yellows and Swift springs in the future (1 inch drop all around basically) and I'm wondering if I should get the FCM bumpstops for the front and the rear or just reuse the rear, or get new oem rear ones and cut? My car has almost 60k miles and has spent all its life in upstate Ny so I can only image the oem stops are done. I just don't want any rubbing. I'm still running oem wheels and tires, but I don't want any issues next spring when I go bigger.

theurgy 08-26-2013 06:24 PM

I would suggest replacing them, you can now get Ground Control Bumpstops for way cheaper. As well I'm pretty sure you can also get some KYB Bumpstop kit to work as well.

Design 08-27-2013 10:29 AM

I wouldn't suggest replacing the rears just yet. Install as designed with the rears in tact. Evaluate the ride and, if too stiff, replace with Fat Cat or trim a couple rings.

theurgy 08-27-2013 10:48 AM

Depending on mileage, I've found that they are usually destroyed by the time you go and replace your struts, shocks and springs.

You unfortunately can't just buy rear replacement OEM bumpstops from Mazda. They only sell them with a rear shock.

If it was me, and I've already got it all apart, I would rather just replace on the spot than to just hope that it is still intact.

alextheguineapig 08-27-2013 10:57 AM

Ok well to keep dustboot functionality in tact, what would I purchase to replace? Should I buy the GC ones or do I need to spend the money on the Fatcat set, or is there another alternative?

theurgy 08-27-2013 12:17 PM

Truthfully, I went FatCat cause I didn't know there were cheaper better options.
I would say maybe look at the KYB sets.


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