A friend recently blew the rear end on his Demon at launch at the local1/8 mile strip. So as to try to protect against the same experience, I recently purchased and installed a $550 Per4mance DIRS 2-piece differential brace on my Demon. Tracked the car the other day, hooked well and ran a 6.5, 108 mph, 1.4 60ft on my first pass, being near the best I've run with my no-mod Demon on M&H slicks. Second, third and fourth passes developed progressively worse wheel hop. Looking under the car at the track it doesn't appear anything broke. Curious to know if anyone with a Demon has had similar wheel hop issues after installing the DIRS brace? Might be time for some fresh rears, but I don't know if that might be the cause starting and just between such few passes and after a good first run. Thanks.
DEMON WHEEL HOP AFTER DIRS 2-PIECE DIFF BRACE INSTALL
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Did you install their Race Brace that goes on the front of the Diff with the Diff Brace? I’m assuming you used the latest P4D brace? The front brace helped with wheel hop for me, keeps the front of the Diff from bobbing up and down.
Wheel hop is cause by spinning and grabbing. Just don't spin! Simple no?
I think your car was going to hop anyways. Diff brace is not the best thing to eliminate wheel hop. I think they make kits for that and I don't think they include a brace. So, maybe you WOULD HAVE broke if you did not have the brace.
I have a lot of friends that run that brace and NONE of them Hop.
To eliminate wheel hop in a pinch you need to drastically INCREASE or DECREASE the traction. Wheel hop is cause by being in that sweet spot in between and the suspension and cradle flexing.
Your OWN example you had no issue at first when the track was on point. Nothing wrong with the car. It was the TRACK or your setup (tire pressure, burnout length, launch style and launch RPM).
SUPER IMPORTANT: Re Torque those 2 verticle 12mm bolts. DO IT!
Yes, I installed the latest version, the 2-piece unit that included the front portion that bolts on to brace.
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The Race Brace is another part, mounts with the front Diff bolts, it’s like a strap that holds the front of the Diff up and keeps it from oscillating up and down further helping to prevent wheel hop.
Here is the best response to the issue.
The diff brace helps but is not a wheel hip eliminator. One can still induce hop if one tries hard enough.
No sorry, I misunderstood. I did not buy the additional $200 front strap. I've got about 75 passes on the car and only after the brace install have I experienced any wheel hop.The Race Brace is another part, mounts with the front Diff bolts, it’s like a strap that holds the front of the Diff up and keeps it from oscillating up and down further helping to prevent wheel hop.
I would consider these arms too.
m.bmrsuspension.com
I elimited wheel hop with these in addition to those two braces.
LTA110 - Lower Trailing Arms, Non-adjustable, Poly Bushings | 2008 - 2022 Dodge Challenger | Trailing Arms | BMR Suspension - High Performance Suspension & Chassis
2008 - 2022 Dodge Challenger Trailing Arms LTA110 - Lower Trailing Arms, Non-adjustable, Poly Bushings - Launching harder, reducing wheel hop, and adding cornering consistency to your 2008-2017 Dodge Challenger is easy with lower trailing arms from BMR Suspension. Stock stamped steel trailing...
I elimited wheel hop with these in addition to those two braces.
I put them in my previous wheel hop king.....a 2008 Shelby GT500 modded. They worked for sure. I just got tired of adding weight to it with more suspension mods all the time to get traction, control etc.
Yes, thanks, I noted the re-torque requirement in the install instructions at 100 miles. The two verticals definitely needed another wrenching.
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