Can anyone give a word here for advice? My car is lowered on k springs, and has the brembo valved dampers, as its a brembo car.

I recently installed AR Shelby Torq Thrusts. The front as it sits looks perfect. Its the right ride height. The rear since its a convertible seems to ride about a 1/4" lower than a coupe would.

Problem is that I noticed rubber on the wheel lip this morning and just a hint of grabber blue on the sidewall of the tires. Tires are 295/30R20 and the wheels are 20x10 in back with a 34mm offset. It's very aggressive, and frankly I'm a little surprised AR went with such an aggressive offset.

I will likely change the rear springs to something that'll bring it up a little too avoid bottoming out or potentially damaging the rear 1/4 panels

Will this cause any issue? For a while I was thinking about Steeda sports, and also swapping the dampers, but it's not in the budget right now. I could at least get the Springs, swap the rears for now then get back in there later and swap the dampers along with installing a preassembled front assembly.

Any downside to this?

Another option would be to find a place that could machine like 5mm off of the mounting pad on the rear wheels.

 

I have no experience with what you are describing in mustangs. I have installed mixed springs on friends cars to get the height they wanted. In my experience, if the spring rates are close there won't be any ill effects.

 

I am sure you can go with higher/stiffer springs in the back and be fine, it probably wouldn't handle the greatest because you would have two different types of spring, but I am sure it would be fine.

 

maybe look for something like this to go under your springs to space them up just a tad
http://www.summitracing.com/parts/gl...FY9DMgod5mcAJw

 

I'm thinking maybe I'll swap to Steeda Sports (as the fiancee and I are both regularly annoyed by how low the thing is - scraping, bottoming out, etc. which will raise a bit, and maybe I'll try their convertible specific springs.

But I'm curious what the real difference is between the ones that are for a coupe and the ones that are for a convertible.

 

Probably higher pound springs for the convertible since it will weigh more.

 

The spring rate is different because of the different weight distribution. Buying springs that are made for a vert would fix your issue. Your going to have a rake though.

 

Thanks Mikey! Steeda it is then...

 

That exactly what I would do..I wonder if they have something smaller?

 

Also, did you change your bump stops? That could be the issue too.

 

Having just done rear spring shopping. I would recommend the H&R Race springs for the rear. They are still a progressive spring but they are the heaviest stock style spring I could find. I also run a lot of tire in the rear(315/30/18) and no rubbing for me.