355 Fender damage after HRE installation...anyone else?

Fenders need to be rolled.

 

There's an incredibly simple solution -- narrower tires. What you've got there is a little 2 fast and 2 furious.

 

I had that problem with my 19" on my 348. Solved it by winding(stiffening/raising) up the front springs/and rear. My car is lowered, still is, but raised just enough to eliminate that headache. To 'wind' up the springs easily, get yourself some good spring compressors, the cheap ones don't fit the smaller coils. I tightened the springs about 1/4", seems to have solve the grabbing. I actually added some to the rear, to even out! Or, do as 'ShineKen' suggests, and roll the fenders. Be careful not to raise to much, otherwise you may affect the 'suspension rake' of the car. Another suggestion, stay away from potholes in tight turning spaces.

 

I agree, 245 for the front setup is too wide for that offset. If that is Michelin 4S’s, then they also run fatter on the sidewalls than other tires.

 

Looking at your front tire size now, at 245/40/18, it is also too tall. If you wanted a 245 tire. It should be 245/35/18. Michelin also makes a 4s in that size.

 

Agreed and check camber. Even a small change can change the clearance drastically.

 

If you like your stance. Rolling will be your best solution. Here is a photo of a car for sale in the east coast. Has the same front tire size as you. You can see the fenders are rolled in the photo.

http://www.catsexotics.com/vehicle-details/1995-ferrari-f355-gtb-coupe--lynnwood-wa-id-40786723
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You'll get better performance out of 225's and 265's too -- less unsprung weight, and less driveline weight for the engine to spin up. Not sure why one would use 245's on the front of a 355.

 

245 40 is the main issue but can be resolved by just rolling. 245 35 is the correct tire if you want that setup

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When did they move Washington State to the east coast

 

*West Coast!!!

 

I use 235 front, 265 rear.

 

My 18” HREs are on factory tire sizing, but I’m pretty low. I ended up shaving my front fenders, and now, no issues.
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My tires can grab a fender during sharp turns if going up a ramp at the same time.
I avoid that situation.
Rolling the fenders and negative camber will help as well.

 

I've successfully 'rolled' two wheel arch lips. Now I almost never get a 'chirp' and then only on extremely tight full compression corners. My experience is: Use a wood baseball bat. Take your time. You don't want an edge. You want a bevel. To much edge will crack paint. Start inside and work out - toward you. Take your time. Start small with the already snagged, bent out portion plus 1/2 inch on either side - hopefully 3'' or less. You can roll more later if you have to. Drive the car and check often. You can always roll more. Darn near impossible to unroll. Take your time. Done right it's almost unnoticeable.