bumpstops, shock length, and tires size. help me iron out the fuzzy points.. - Page 17 - JeepForum.com

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post #241 of 383 Old 12-20-2011, 05:48 PM
Yellow02
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Originally Posted by dreed View Post
Only if you get shorter shocks.
Oh....... right i didnt think about that

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post #242 of 383 Old 12-20-2011, 05:49 PM
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Originally Posted by Unlimited04 View Post
do metalcloak fenders have anything to do with the mounting locations of your shocks on the frame?



^this.
No nothing to do with shocks
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post #243 of 383 Old 12-20-2011, 05:53 PM
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Originally Posted by Yellow02
ok awesome i understand how you got that thank you, now the bumpstop size will decrease since i have metalcloaks right?
If the tire hitting the fender were the only issue, that would be true.

But since you just figured the bumpstop based on your shock length, you are setting the bumpstops up to protect the shocks from bottoming out. The fender clearance does not matter in this case.
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post #244 of 383 Old 02-16-2012, 12:57 PM
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Good stuff.
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post #245 of 383 Old 02-26-2012, 05:09 PM
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I've seen it mentioned a couple of times that front bump stop extensions should be mounted on the lower spring perch and rear bump stop extensions should be put in above the cup. Can someone explain why that is and what difference it makes? It would seem as long as the excess distance between the two (based on shock travel) is being taken up by an extension of some type, it wouldn't matter whether it was from the top or the bottom? For whatever reason, adding a spacer of some sort on the spring perch pad (front or rear) seems it would be easier as well as stronger?

Thanks! I'm a relative newb and still trying to digest everything I've been learning here.
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post #246 of 383 Old 02-27-2012, 12:18 AM
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Originally Posted by bdavis6635 View Post
I've seen it mentioned a couple of times that front bump stop extensions should be mounted on the lower spring perch and rear bump stop extensions should be put in above the cup. Can someone explain why that is and what difference it makes? It would seem as long as the excess distance between the two (based on shock travel) is being taken up by an extension of some type, it wouldn't matter whether it was from the top or the bottom? For whatever reason, adding a spacer of some sort on the spring perch pad (front or rear) seems it would be easier as well as stronger?

Thanks! I'm a relative newb and still trying to digest everything I've been learning here.
If you extend the front bump stop above the cup it may hit the spring at full droop.

With sufficient thrust, pigs fly just fine.
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post #247 of 383 Old 03-07-2012, 04:03 PM
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Originally Posted by bdavis6635 View Post
I've seen it mentioned a couple of times that front bump stop extensions should be mounted on the lower spring perch and rear bump stop extensions should be put in above the cup. Can someone explain why that is and what difference it makes? It would seem as long as the excess distance between the two (based on shock travel) is being taken up by an extension of some type, it wouldn't matter whether it was from the top or the bottom? For whatever reason, adding a spacer of some sort on the spring perch pad (front or rear) seems it would be easier as well as stronger?

Thanks! I'm a relative newb and still trying to digest everything I've been learning here.
Does anyone have any experience with the Fox Racing 2.0 Air bump stop? They are to be used with the Synergy suspension front air bump mounting kit. I am looking to move my shocks outboard and am going to use the Synergy kits that have been mentioned in other threads here but just noticed these on the Quadratec site. Just curious I know they are pricey versus using the correct height bump stop.

http://www.quadratec.com/products/16335_2020.htm

http://www.quadratec.com/products/16355_102.htm
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post #248 of 383 Old 04-30-2012, 09:41 PM
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post #249 of 383 Old 05-10-2012, 10:04 PM
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is it safe to ask what bump stops are needed for a 2004 wrangler, with 2 inch BDS suspension lift, a 1 inch body lift and 33x10.5r15 (on 5.5 bs ravines). thank you for any help.

2004 sahara, 2 inch BDS spring lift, BDS discos, 31bfg at, on ravines.
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post #250 of 383 Old 05-10-2012, 10:42 PM
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is it safe to ask what bump stops are needed for a 2004 wrangler, with 2 inch BDS suspension lift, a 1 inch body lift and 33x10.5r15 (on 5.5 bs ravines). thank you for any help.
just enough to that the shocks don't bottom out, and so the tires don't rub the steel of the fender.

you have to figure that out by pushing the axle to full bump and full flex, with the springs removed.
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post #251 of 383 Old 05-11-2012, 01:47 PM
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Does anyone have a link to an exploded view of the rear spring/bump stop that shows the parts and the bolt size?
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post #252 of 383 Old 05-11-2012, 02:20 PM
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Does anyone have a link to an exploded view of the rear spring/bump stop that shows the parts and the bolt size?
i don't have an exploded view CAD image, but I can show you want they look like. bolt size is M10.

The jounce bumper is the soft piece, and the bumpstop cup is what holds it.



the soft jounce bumper will fully compress into the cup:


here's what they look like installed with an aluminum 20mm bumpstop extension:



here's what they look like installed on a 2" BB with 2" bumpstop extension:

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post #253 of 383 Old 05-11-2012, 04:08 PM
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I'm guessing (haven't taken one out before) that the cup is bolted to the body. How does the bumper mount in the cup?

What I'm trying to figure out is, for a small bumpstop extension, why couldn't you simply use washers behind the cup to space it down, thereby extending the bumpstop?
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post #254 of 383 Old 05-11-2012, 04:51 PM
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Originally Posted by MCDavis View Post
I'm guessing (haven't taken one out before) that the cup is bolted to the body. How does the bumper mount in the cup?

What I'm trying to figure out is, for a small bumpstop extension, why couldn't you simply use washers behind the cup to space it down, thereby extending the bumpstop?
Yup, cup is bolt on with a bolt (15mm socket IIRC). The jounce bumper is just stuck in the cup. You can pull it out with a pair of channel locks.

Nothing wrong with using some fat fender washers to extend the bumpstops a little...but they are thin, and it gets expensive & silly to stake a whole bunch of grade 8 fender washers. I use Performance Accessories body lift pucks on my Jeep. They can be had pretty cheap, and you can buy them in up to 3" tall...then measure & cut them to fit. "Mini-Blocks" fit in the rear, and "Big-Blocks" fit in the front.
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post #255 of 383 Old 05-12-2012, 08:34 AM
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Ok, just ordered an MB03 from Summit. Got a band saw in the shop, so cutting it down shouldn't be a problem.

I'm not doing the work myself, so it'd help if I could provide the new bolts with the rest of the parts, if needed. Any idea if the stock bolts can handle a 1/2" spacer? If not, anybody know what size bolt it is, or where I can find the info online? All I can find are the OEM exploded view diagrams, but they don't have the bolt size.
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