korina

Hello all. Long time lurker and first time poster here. I've done the search thing on multiple forums and I have conflicting or contradictory info. I know somewhere here has been down this road and has the answer I need. I have an 01 turbo. I've removed the front diff and installed the stubs. I'm going down the GT2 conversion road and I bought a set of wheels and tires. The rears are 12x18 OZ Alleggerita and the ET is 51. The tires are Michelin 315/30-18s. There is slight rubbing on the inside rear. Can anyone definitively make a recommendation on the size of the spacer I should buy? I don't mind if I have to roll the inside of the fender lip. If there's a vendor to buy them from who will also sell the longer studs to match it would be great. My car is slightly lowered by a PO. It's nothing outrageous. Any other comments on the conversion are welcome. Thank you.

Rvca3112

If you're running now I don't think you need spacers. Is your suspension springs or coilovers?

korina

It's rubbing now. For sure. I definitely need some room in there. I have shocks now but I have a set of coil overs I haven't installed yet. It's rubbing on the fender liner in the rear. It's an east-west issue. Not a north-south thing.

James88

I had same issue, see my post number #47 and all previous posts in same thread. You can bend the liner brackets to suit plus you can easily modify with a new screw to for added support.
https://rennlist.com/forums/996-turb...2-sizes-4.html
Once you're in there, its quite easy to see what is required.

pwdrhound (John) was the one who really helped me on this one.

If you're having issues with front tires rubbing, here is another thread by pwdrhound
http://www.6speedonline.com/forums/9...big-tires.html

911mhawk

Fender liner rubbing is common like mine below, search GT2 liner brackets, use google not the Rlist search function if you want to find anything.
https://rennlist.com/forums/996-turb...996-turbo.html

The GT2 and 996 turbo liner are the same, but the bracket that holds the liner near the boost hose is shorter in the GT2 so it pulls it away from the tire more. Mine are rubbed through too, I need to spend some time under it and put in the new ones with the brackets. Powdrhound has a good thread about heating the liner and drilling holes on it located to help pull the liner to the bracket and away from the wheel.

"02996ttx50

agree. the gt2 liners along with rolling the fenders is probably the best. though the stockers can be bent to allow a bit more clearance as james has noted.. spacers shouldn't be necessary on a 12". still, rub happens on a lowered car, particularly if you bounce on/off camber a lot as i do.

this was my last oem liner lol

32krazy!

gt2 offset is 45 and he has 51 offset. needs a 6mm spacer to bring it out from rubbing

s65e90

It's only rubbing because the offset is wrong. Put a 10 mm spacer on it and it will be fine.

I run a 12" rear with a 315 tire and never have had any rubbing. Those saying they do need to check their fitment.

"02996ttx50

you probably drive primarily on flat surfaces. rubbing is common, and it isn't *only* because of an incorrect offset. though on straight/flat surfaces, i would say you're right. they shouldn't rub at all.

s65e90

I drive my car everywhere and routinely take it on road trips from Florida to Connecticut and back. Bad roads in NYC and the like and it's fine. Rubbing is common when fitment issues are at hand. Proper fitment = no rubbing. In OP case, yes the offset is not right for a WB rear wheel. It needs more negative offset.

Carlo_Carrera

He might need both spacers and some wheel liner heat gun work.

manimal

My rear wheels are 12x18 ET43 with 315/30/18 PS2's. I'm pretty sure the PO's did not mess with the fender liner bracket, and I drive my car hard with no rubbing (running -1.7 camber).

7-10mm spacer seems like it would be good.

"02996ttx50

i'm not arguing with you ( well ok, maybe a little.. lol )

i'm telling you i have no offset issues given i'm running std gt2 wheels and sizes..my offsets are gt2 wheels with gt2 liners and i bounce around a lot and they will rub on hard compression..i highly doubt we are driving under the same sets of conditions..i'm often at 10% grades with extremely tight corners as i live in a state park and it's the epitome of remote canyon driving. trust me when i say you would bounce too. so again when you say: "Rubbing is common when fitment issues are at hand. Proper fitment = no rubbing."

that is simply not empirically "true". issues and conditions such as i have outlined will contribute to "rubbing" even if there are NO "fitment" issues. just because they haven't occurred to you? doesn't mean they won't or wouldn't under similar circumstances, such as i encounter daily.

but i now see the op's offsets are NOT gt2 fitment. so i imagine thats his issue.

ok, now i gotta bizzounce lol

manimal

You must be lower than I am, which is obviously another factor.

powdrhound

Lots of good and bad information out there. Keep in mind Porsche does not build cars where tires rub holes in fender liners. A GT2 does not rub from the factory. All you need to use is the same parts that come on the GT2 and you are set. This consists of 18x12 ET45 wheels and GT2 fender liner brackets. The people that have rubbing issues are not using the correct set up with the GT2 brackets being the main overlooked item.

Your problem is an ET 51 offset which pushes the tire 6mm closer to the fender liner. Combine that with the TT liner bracket which takes up about 10mm of room by the lower intercooler hose and you get the results you're seeing.

For your application, simply install 7mm spacers, GT2 brackets, and you are set. No problemo. If you roll your rear fenders (GT2 fenders are rolled from factory, TT ones are not) you can push the wheel out a little further by installing 10mm spacers. 18x12 ET40 with 315/30 is perfect with rolled fenders. I recommend rolling the fenders ala GT2 as it's very easy to do and takes only about 30 minutes to do including removing the wheels.

Go with spacers that have the hub centric hub extension built in. This is what I recommend, 7 or 10mm:

http://www.elephantracing.com/suspen...el-spacers.htm

With the right offsets and right parts, you can comfortably run 335s without any rubbing. I run tires which are 14" wide at below GT2 ride height and have zero rubbing. 315s at 12.5" wide are a no brainer with plenty of room to spare.

By the way, contrary to popular belief, ride height does not have anything to do with the rubbing of the liner by the intercooler hose. As the suspension compresses, you are actually creating more room in that area as the rear wheel moves up and slightly forward. One of the issues at play is the fact that the rubber bushings in the rear LCAs will compress under load allowing the whole wheel assembly to move fore and aft up to a 1/4" or more. That's why many guys rub the liner even though they have room between the liner and tire under static load. If you run solid bushings and mono *****, much of the rubbing is eliminated. Again though, with the right OEM parts, you won't have any problems.