k fellas ive done some reading . Everywhere i see the brembo pgk ordered its called "with special pirelli summer tires".

SO wait for warm weather and re evaluate whether im changing anything

Ive already been sterred in the direction of tire temp plus the rain
being an issue. now im more convinced

no no no to the other poster ,i was hopping on primo smooth pavement powering through and out of a turn.

Yes well aware uneven pavement can cause that ... this is road cours bro. not the city . yes ive got killer driving roads here in way nor cal.

the reason I was suddenly worried about the warranty as of the earlier posters comments . still unanswered. Looks like the fact stands wheel hop exists ansd may or may not be a prob --how you drive -style ect aggressive ect

Seemed i was going to be turned in for abusing my car to do what they designed it for.
And i paid for it not knowing Id be modifing it at all. based on reports and you tube reviews I was convinced it was adaquate.

didnt exatly like the "stupid " comment aimed at me regardless whether it was or not. im here to learn, not be the best driver or know it all

 

Let me get this straight...
You thought someone from Ford was watching what you were typing here and was going to say you were abusing your car and void your warranty?

Wow.... And I am known as the paranoid guy on these forums?

 

"BTW, Our local FCR probably wants your info to tell your dealer to refuse your claims. Personally, I don't think you should hand over your info.'' was wrote by my friend Hareball .

I didnt understand what an FCR is getting at....

Well LA driver was it 46 degress in LA when you were a hopping? does it ever get tht cold there. for gods sake im in the emerald triangle . high highs and low lows for Cali. her in the Green zone. not your bay area "mild climate"

oh beautiful ride there blacksmoke

Sure ive read more see my post where the tires are referred to the "summer tire" pkg.(PZero)

If its just a summer tire issue Ill order up the shelby honeycombs in black with the appropriate street racing tire (RAIN TIRE) didnt buy the car to keep in the garage.

Also autocrossers - again I applaud your legal and organized fashion.

Not my thing --I run the Hwys ect canyons ect.

Sure I might not be the best driver in this world-but if Id post and autobiography (yawn) we might get the whole pic.

The fact im alive now and carry A++ ins. says im real lucky or real good.

!?

Experience dont matter , im sure thats how those whiskyrunners showed um how its done in early grand national, nascar ect.

 

maybe not soo paranoid after all??? call the number its legit.

As if a "deysha" would be able to help me with the issue.

Dana Patrick maybe.

 

I don't understand the case of wheel hop while cornering, unless it's as you approach the wildly tail-hung-out attitudes like you'd see at a drifting competition. If that's the case, Ford is under no obligation to build a vehicle that better suits the sort of driving that is seen as being reckless when performed/exhibited/demonstrated on public streets.

Quote:

Originally Posted by 90stang5.0

I don't completely disagree with you Norm, but there are many people that have significantly reduced hop with just substituting the GT500 LCA's. That seems like a good place to start for Ford. And personally, I didn't notice a NVH increase with my mods; or at least not enough to overcome the benefits of no wheel hop.

The GT500 bushings are slightly stiffer, consistent with that sub-model's greater expected traction issues and harder normal acceleration usage relative to GT and sixxer models. When installing them in a GT, at least some reduction in hop should be expected.

Quote:

My LCA relocation brackets are for sure a personal choice to eliminate the "rocking horse" effect of the car. I don't think they have a huge effect on the wheel hop issues.

I'm sure that they have at least an indirect effect - you get more load transfer happening sooner, and you may not even get wheelspin under most conditions. The portion of rearward load transfer that causes rear end squat takes a little time to develop, and having most of that developed 50 or 100 milliseconds sooner can make a difference. You need to be in wheelspin before you can get into hop.

Quote:

I go back to my CTS-V for solution to wheel hop. All it took was to change 1/2 shaft diameters to eliminate the wheel hop. Cadillac FINALLY did this on their own for the 2009 V while the rest of us 04-07 owners had to do it ourselves.

I know a little bit about this one. The intent there is to separate the RR and LR torsional frequencies by enough so that one wheel doesn't get the other one going in resonance (something that tends to amplify after a couple of cycles). I suppose you could do something similar with a stick axle, but if the "little" axle shaft is kept at 31 spline, the other one would be positively huge - bigger than anything anybody currently makes for any car axle and probably too big to even fit into a standard 8.8" axle tube and still have room for the bearing.

But it does address the idea that a lot of wheel hop is due to torsional resonances. So everything that has a torsional influence is part of the problem. I think you'd like these things to all have different natural frequencies.
Tire carcass stiffness (think wrinkle-wall slicks vs R-compound road course/autoX tires)
Rear control arm bushings
Clutch disc construction (center springing and the marcel)
Engine and transmission mounts
Drive shaft design

Quote:

The point I am trying to make is, there is NO reason that after 5+ years of a known problem, Ford can't fix the problem on their own or at least significantly reduce it.

Understood, and I'd be willing to settle for "significantly reduce" for most cases. It's probably impossible to eliminate it completely, for all cars on any tires on any width wheels under all weather conditions.

What I don't know is how closely the current car is crowding up against the various corporate standards, so you might end up having to do a little each of several things instead of trying to make only one change do the whole job (NVH requirements might have been relaxed specifically for the GT500). Anyway, that puts you back to re-working everything to fix the "downstream consequences" with respect to axle steer and roll center height, etc., etc. It is probably easier for Ford to simply define most cases of "repeatedly getting into wheel hop" as constituting abuse if they were able to meet their internal performance targets for the car without it being a problem. Let the aftermarket take care of the relatively few.

Quote:

Would everyone be OK with a bad clutch problem and the solution for it was just to drive it easier

Something like that would have every-day normal driving consequences such as excessive slippage (acting like a nearly-dead clutch) or unusually harsh or abrupt engagement (like a competition-only clutch).



Norm

 

Yea, I agree with all you said. The torsional frequencies were indeed the problem with that car. The point I am trying to make is, when I bought my car, bone stock, the least little throttle input (in a straight line) on wet pavement would shake the car violently with wheel hop and also on dry pavement when driving it a little hard. And yes the pavement was smooth (for the other posters). I am not talking about a "little" hop, it was EXCESSIVE and potentially destructive! That was the reason for my aftermarket part installation. I would have loved to save the $$ I spent on those suspension parts not to mention my time installing them.

I have a problem with telling someone to change their driving style to overcome a design issue. That was the analogy I was trying to make with the clutch example....if it worked OK during "normal" driving, but caused problems during "spirited" driving, no one would accept that as being OK. However, with this wheel hop issue, that seems to be the answer. Ford should be addressing it, but as you said, they may be close to some corporate design standards. Peace.

 

Roush sells a part to eliminate wheel hop. Go to the Roush web page under parts 4th page.


ROUSH Rear Wheel Hop Reduction Kit
2011 Mustang

$296.60

 

Exactly, you just made my point, again. So why doesn't Ford do that? I installed this same part. It was not a fun job and AGAIN no excuse why Ford can't do this when they have had a known problem for 7 model years. Absolutely NO EXCUSE why that can't be done on a $35k car!!!!!!!!

BTW, others have this same part for less money (like UPR) and if you are going to the hassle of doing it, purchase an adjustable one in case you lower the car later on.

 

Thanks.....I am planning on a 2" drop. I never had a big problem with wheel hop. When I first test drove my mustang.......dealer didn't go with me.....I did a 5000rpm clutch dump and it wheel hopped ridiculously....almost didn't buy the car.... it was so bad.....figured I could resolve that problem. So, I pick up the car...new and it has not once wheel hopped on me since the test drive..... on the track or street. I'll will still install the wheel hop eliminator.......nothing is worse then unexpected wheel hop. It will knock your teeth fillings out!!

 

I'm honestly curious here, having looked at the Roush page - does this part revise the UCA inclination? (my expectation is that if it does, the chassis side pivot drops a little lower).

There's a good chance that at the OE level, rear crash requirements drive this sort of thing, as you can't be having suspension components poking through the floorpan or tearing it apart and skewering/slicing a center rear seat passenger in the event of a rear end collision (never mind the likely whiplash).


Norm