FOX's new IFP/Negative spring bumpstops coming soon!!!!!!! - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 19 Old 04-07-2015, 10:54 AM Thread Starter
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FOX's new IFP/Negative spring bumpstops coming soon!!!!!!!

Packaging advantages:
  • Easily mounts to JK front bump tube.
  • Threads allow easy adjustment of height
  • Fill port allows pressure adjustment from strike pad side


Performance advantages:
  • IFP inside shaft. Connected to rebound side of main piston, so cavitation is
    impossible.
  • Negative spring- reduces the impact felt at initial contact.
  • These two factors work together to make a vast improvement in bumpstop
    performance in multi-use vehicles (such as Jeeps and trucks)
  • In a slow hit- A traditional bumpstop is felt and makes a noise at
    engagement because it has to overcome the force from the charge
    pressure, typically around 200 lbs. The negative spring in the new
    bumpstop counters that force, making the force required around 10 lbs.
    This means that the bumpstops are not felt during rock crawling and onroad
    situations. However as they are collapsed, the force ramps up to
    levels higher than traditional bumpstops to prevent bottom-out.
  • During a high speed hit, a traditional bumpstop takes approximately half
    its travel to ramp up to full damping force. This is because it is an
    emulsion shock- the oil is mixed with nitrogen. The new style shock uses
    an IFP (Internal Floating Piston) design, therefore creates full damping
    force from initial contact all the way through its travel. This extra force
    helps to slow the suspension travel sooner and smoother.
  • In combination, these two features make the new bumpstop design
    superior in slow hits and on-road manners, while still having more overall
    stopping power for the big hits.

Available in: 2.0" travel, 2.5" travel, JK front kits, and JK rear kits.

Up on the Off Road Warehouse's website for pre-order!!!!!:

http://offroadwarehouse.com/i-212427...-stop-kit.html
http://offroadwarehouse.com/i-212398...-stop-kit.html




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post #2 of 19 Old 04-07-2015, 11:19 AM
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Any pics of the units installed?

TC
Crawling For Reid March 23, 2019 Adventure OffRoad Park


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post #3 of 19 Old 04-07-2015, 11:21 AM Thread Starter
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Fox IFP bumps

Quote:
Originally Posted by TCdawg View Post
Any pics of the units installed?
Units are not available yet, however as soon as they provide installed pictures or I get a set installed here at ORW I will make sure I have pics up for you folks to enjoy. Thank you for the interest.


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post #4 of 19 Old 04-07-2015, 04:30 PM
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These are awesome. Definitely interested.
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post #5 of 19 Old 04-07-2015, 05:20 PM
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price quote for front and rear to 95128 please
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post #6 of 19 Old 04-08-2015, 07:13 PM
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Quote:
Originally Posted by Recharge View Post
These are awesome. Definitely interested.
X2! Keep us updated please!

08 JKU 6.0 LC8 6L80 Atlas 2 39" KM3's on Trilogy race beadlocks, prorock 44,rcv's arb front. rock jock 60 rear 40spline shafts,arb 5.13's and a bunch of other stuff
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post #7 of 19 Old 05-06-2015, 09:11 AM
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post #8 of 19 Old 05-06-2015, 09:40 AM
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699 per kit...

Kyle
2013 JK Sport S Wrangler
1999 Mustang GT
1997 Ford F-250 4X4
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post #9 of 19 Old 05-11-2015, 01:01 PM
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great though they may be, I don't see being able to pay 700 smackers for a set of the awesomeness for a year or so...

on this subject, can Daystar stingers be used in the OEM cups as an upgrade option until these can be afforded? Don't mean to hi-jack thread but thought I would ask


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post #10 of 19 Old 05-11-2015, 11:16 PM
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subscribed.
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post #11 of 19 Old 07-09-2015, 10:05 PM
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Anybody get these yet? Reviews?
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post #12 of 19 Old 07-13-2015, 01:29 PM Thread Starter
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Hey bud, Fox hasn't shipped any yet due to complications in manufacturing of them. I was told it would be about 3-4 weeks. We will see *fingers crossed*


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post #13 of 19 Old 03-17-2017, 07:57 AM
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I know this is an old thread, but any new info on these? I see they are available now, just wondering if anyone is running them?

08 JKU 6.0 LC8 6L80 Atlas 2 39" KM3's on Trilogy race beadlocks, prorock 44,rcv's arb front. rock jock 60 rear 40spline shafts,arb 5.13's and a bunch of other stuff

Last edited by 89yjon; 03-17-2017 at 08:15 AM.
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post #14 of 19 Old 03-17-2017, 11:56 AM
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Quote:
Originally Posted by 89yjon View Post
I know this is an old thread, but any new info on these? I see they are available now, just wondering if anyone is running them?


I'm running them, no complaints at all. They're quiet and progressive.
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post #15 of 19 Old 03-17-2017, 01:30 PM
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Quote:
Originally Posted by SmashHole View Post
I'm running them, no complaints at all. They're quiet and progressive.
Thanks for the reply! Sent you a pm also

08 JKU 6.0 LC8 6L80 Atlas 2 39" KM3's on Trilogy race beadlocks, prorock 44,rcv's arb front. rock jock 60 rear 40spline shafts,arb 5.13's and a bunch of other stuff
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post #16 of 19 Old 03-17-2017, 01:51 PM
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I got mine installed a while ago and ran them at King of the Hammers this year.
Makes a massive difference going fast in the bumps
I'll have them out crawling once the snow melts a bit and I can get to the Rubicon, Fordyce, Dusy, etc.







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post #17 of 19 Old 03-19-2017, 07:45 PM
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Thanks for the pics! The only thing I'm not sure I like about these is where the valve is located to change\fill the nitrogen. Looks like it would be a pain in the butt to adjust it on the front end...
Aus-Jeep, what psi are yours set to on the front of your Jk?

08 JKU 6.0 LC8 6L80 Atlas 2 39" KM3's on Trilogy race beadlocks, prorock 44,rcv's arb front. rock jock 60 rear 40spline shafts,arb 5.13's and a bunch of other stuff
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post #18 of 19 Old 03-20-2017, 02:53 AM
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FOX's new IFP/Negative spring bumpstops coming soon!!!!!!!

Quote:
Originally Posted by 89yjon View Post
Thanks for the pics! The only thing I'm not sure I like about these is where the valve is located to change\fill the nitrogen. Looks like it would be a pain in the butt to adjust it on the front end...
Aus-Jeep, what psi are yours set to on the front of your Jk?


They're not really made to adjust frequently, the internal spring takes so much of the harshness out so it's not that much of a big deal. Fox sells them pre-charged to 160 psi.
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post #19 of 19 Old 03-22-2017, 10:06 AM
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Just picked up a set for the front! Can't wait to get them installed and see how they work out!

08 JKU 6.0 LC8 6L80 Atlas 2 39" KM3's on Trilogy race beadlocks, prorock 44,rcv's arb front. rock jock 60 rear 40spline shafts,arb 5.13's and a bunch of other stuff
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