fender rolling tool

[ninjabones]

Anyone have one of these fender rolling tools that they'd be willing to lend me this weekend?  (please spare me the offers to borrow a baseball bat... I'm looking for a more refined finish). Thanks.

http://www.eastwood.com/autobody/fender-roller.html

[bobt993]

Glen,  

You would be surprised how well a baseball bat works in the hands of a good mechanic.

[Larry Herman]

A nylon hockey stick shaft works much better.  Produces a very smooth edge, unlike a baseball bat.

[Darren]

I have one Glen

[Darren]

On it's way to Thunderbolt for you...

[ninjabones]

Much appreciated. Since I moved to Hoosiers a few weeks ago, I developed a rubbing issues on the left rear inside wheel-well (10x18 ET65 rear wheel and 285/30/18 R6s).  It's a bit surprising as other guys with 993s run this configuration without any issues and have even more negative camber than I'm running (currently at -2.1). 

You can see rub marks down to metal and a few sharp shard-like step-offs along the bottom edge.   Fortunately, I was inspecing my tires regularly and found the 1" tear down to cord on the inside sidewall. 

I used an angle grinder and smoothed out the rough spots, applied some POR15, and threw in 3 mm spacers on the rear wheels (borrowed from Larry).  Hopefully this will fix the issue, but may require me to roll the fenders given the offset change.  I marked the tires with a grease pencil to inspect after my first run tomorrow.

Still wondering why I'm having the issue when other 993s don't seam to have a problem.  Could be that my car is slammed too low for the soft springs that I'm running (approx 450/600).  It's hard to tell whether the rubbing is at full bump or somewhere else on the range of suspension travel.  I'll probably have to get it on a lift and run the suspension through the full range of travel to figure it out. 

[Darren]

What kind of wheels are they?  My CCW's actually flex I've found...

I think other people do have rubbing issues, if I remember correctly Bob had an issue rubbing on an oil line on the inside rear. 

[ninjabones]

2-piece forged BBS RS-GTs and Porsche OEM 996 MY02 5-spokes (both with same offsets)

[Darren]

Well those probably aren't flexing

I think you're probably right that with all of the grip of the Hoosiers and you driving swiftly, you could just be getting too much suspension compression -- so slow down

Why are your spring rates so low? It's a dedicated track car isn't it?  Everything works together, you have the grip but not the springs to support that grip.

[ninjabones]

I didn't think they were that low when I bought them (PSS9s are only like 250 fr / 500 rr).  The JIC set-up that I bought was about as stiff as I wanted to go and still have a "streetable car".... However, that was a year-and-a-half ago, and my aspirations for the car have changed a bit.  I don't have the budget this year for a new suspension, so maybe next year I'll move up to JRZ or Motons, but for now, I'll have to live with what I got.

For reference, here are the spring rates commonly used on 993s:

US factory M030 150-200 fr 225-275 rr
Eibach 7209 120 fr 200 rr
Weltmeister 180 fr 268 rr
H&R peformance 240-260 fr 280-310 rr
H&R coilovers 290-310 fr 350-370 rr
H&R supercup 310-350 fr 385-435 rr
BIlstein PSS-9 225-250 fr 400-685 rr

993 RS 246lb/in fr 457 lb/in rr
"Motorsport" 600 fr 800 rr"


GT2 competition version:
front yellow 270N/mm 27.5kg/mm 1542lb/in to 320N/mm 32.6kg/mm 1827lb/in
rear red 296N/mm 30.2kg/mm 1690lb/in to 350N/mm 35.7kg/mm 1999lb/in