traction or rub

[2011/5.0]

looking to go to the 325/50/15 mt et streets for my 10" weld rts wheels,im haveing trouble hooking since the 3600-3800 stall coverter was put in, i run the 295/55 now with a 373 gear.. (2011 5.0 )cai tune alumn shaft orx circle d 36-38 ,no isses before at 25 psi...5 sec burnout at 50mph and 25 to 16 psi only hooked 2xs for 1.63 and 1.64 60 ..one at 25psi and 1 at 18psi track prep was no issues for others....j&m lca also.... didnt know if this tire would help,or rub thanks

 

[cdog1157]

car lowered?

 

[stkjock]

You will need relocation of the sway bar

They will fit.

 

[Captainstr8edge]

He already has 15's, just looking to to swap to a wider tire, so im assuming he already did the swaybar. I know on my 07 i had to cut the bump stop bracket to keep from running, but i dont know about the 10+ models.

 

[2011/5.0]

yes i have the 10x15 rims 7.5bs and relo bracket, just didnt know if the wider tire would rub on the 2011,i also have the adj panhard bar ,i know05-10 had to remove a stamped plate inside the fender to run the 325 ..thanks

 

[2011/5.0]

the car is not lowered,i enjoy drag racing as well as long car cruises,just looking to keep lowering my 60ft but want the car consistant,the mt et street is the tire i fear the least if i get caught in the rain on cruises,i just didnt know if any 2011-to 2013 guys were running 325 tire with any inside fender issues,i also c alot of guys going to an adj rear shock for the strip,im looking for clean track hookups not just a fat tire,im searching and researching as much as possible,i know suspention is as important as tire

 

[Sharad]

My friend's '05 did not require removing the bump stop plate to run the 325/50-15s.

On our Coyote car, the 325/50-15s fit just fine without rubbing, but being honest with you, they aren't tucked enough for my taste.

But two things that come to mind about your traction problem are that you're probably running too much tire pressure. I wouldn't go over 15psi for a 15" DR. I usually stay between 12-15psi on the 15s.

Second, you could certainly use more suspension upgrades. I'm certain you'd see a very noticeable improvement in grip if you ran our UPR Pro Street UCA & Mount, and a good set of Strange or QA1 adjustable shocks.

 

[2011/5.0]

would it be acceptable to run the marocco 55D rear spring with an adjustable shock in back,after the 17 welds with 185/55/17 were installed the front dropped -1 5/8 do to lower tire height and the rear 295/55 raised the rear up +3/4 ,not sure how this is effecting the weight transfer of the car,these springs are suppose to lower rear 1/2-3/4 with stock ride,the car really looks jacked up, but there no taller radial for the front on the market for a 4.7 rim right now

 

[Sharad]

would it be acceptable to run the marocco 55D rear spring with an adjustable shock in back,after the 17 welds with 185/55/17 were installed the front dropped -1 5/8 do to lower tire height and the rear 295/55 raised the rear up +3/4 ,not sure how this is effecting the weight transfer of the car,these springs are suppose to lower rear 1/2-3/4 with stock ride,the car really looks jacked up, but there no taller radial for the front on the market for a 4.7 rim right now

Those "55D" springs are the Brembo leveling springs somebody came out with recently, right? If so, I understand they're pretty soft, so I wouldn't expect them to hurt your 60-foot times. Install those springs with these shocks and drop the tire pressure to 15psi. I'd expect the car to hook harder and more consistently.

http://www.uprproducts.com/strange-mustang-adjustable-shock-05.html

 

[2011/5.0]

ya thats the ones,i would like to keep the nice ride for the street,how tuff is it to get at the adjusters on those shocks

 

[Sharad]

ya thats the ones,i would like to keep the nice ride for the street,how tuff is it to get at the adjusters on those shocks

Super easy, no tools or jack required. Just hop out of the car and reach under there. They're very easy to work with!

 

[Grabber Blue 5.0]

If track times are important, the 3.73's were a really poor choice. Your car is shifting into 4th before you cross the finish. You can offset that with a taller tire but no tire will help the gearing that much. And the 3.73's with a 4.17 first gear in the auto are another reason you are having trouble hooking.

 

[2011/5.0]

so you think the 3.73 gear is to much gear for the 295-55-15 27.8 tall
drag radial? most are running 4.10 in the auto

 

[Grabber Blue 5.0]

most are running 4.10 in the auto

Maybe the slower ones are. Your problems are two fold. The first gear in the autos are 4.17's. That matched with your 3.73's are not helping your traction issues and more importantly they are causing your car to shift into 4th before the traps. Maybe that's why all the fastest N/A autos are using 3.31's.

 

[2011/5.0]

thats intresting i never had anyone give the 331 gear as a good option
i know about the low 1st gear,i have hit a 1.59 60ft with the stall once but my traction problems have just came up after the install of the stall,so in your option i should go to a 3.55 or 3.31,the car was a dog with the stock 3.15, its cheaper for me to do a gear change than pull the stall and have it redone

 

[Grabber Blue 5.0]

With 3.55's you would also be shifting into 4th before the traps. Here is a good example of someone with 3.31's. Deep gears are not the answer in these cars to run good times.
http://www.youtube.com/watch?v=fdM2fQ4UKvU

And I happen to love my 3.15's.

Off topic but any pics of your car with the Welds?

 

[2011/5.0]

theres some in my profile