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[1MOREMOD]

Originally Posted by M3PO

What size is your spacer? I run 18x10.5 +20 (+25 with a 5mm spacer) with a 285 RS3 in the rear with no rubbing.

i have a 12mm on the rear and none on the front. sounds like i may be okay with what you are running? it will be close, my math is foggy. i think im 1mm more pushed out than you?

[M3PO]

Originally Posted by chriszeh

i have a 12mm on the rear and none on the front. sounds like i may be okay with what you are running? it will be close, my math is foggy. i think im 1mm more pushed out than you?

That's right according to my math. I am running a 10mm wider tire too.

It's not a big deal but sometimes those spacers are on there REALLY good. It might save you damaging the rotor hat and/or the spacer if you don't have to mess with them (ask me how I know).

[1MOREMOD]

Originally Posted by M3PO

That's right according to my math. I am running a 10mm wider tire too.

It's not a big deal but sometimes those spacers are on there REALLY good. It might save you damaging the rotor hat and/or the spacer if you don't have to mess with them (ask me how I know).

yeah i know i banged up my front hats before i got the hang of taking them on and off more easily.

[klammer]

Congrats on the new setup. Looking forward to a compare/contrast with the ad08's. Loving the 2 racks of tires in the garage

[1MOREMOD]

Originally Posted by klammer

Congrats on the new setup. Looking forward to a compare/contrast with the ad08's. Loving the 2 racks of tires in the garage

thanks. hope they get me a 1-2 second a lap advantage. i am going to run my ad08s one more dry day at least to get a baseline. havent had a full dry day and still set a new PR with the camber set up more aggressively.

[bigjae1976]

I know KWs on E46s had a larger shock body and a helper spring which interfered with wider tires. Not sure if that is case on the E9X...I believe Porschefile had some fitment issue.

The NT01s make a nice coo-ing sound at speed. I think they are good for 1 second per minute improvement right out of the box. Do be aware that they don't make noise until you are already sliding. So you need to feel the car, not hear it. Otherwise you'll be in for an oh shit surprise As with R-Comps...they like more slip angle but are not as progressive when they give up. Try not to understeer a lot in them because you'll wear them out pretty fast.

I replaced a set of RS3s with my NT01s. My best lap on the RS3s at Texas World Speedway, a fast 2.9 mile course, was a 2:00:03. My best lap in the NT01s was a 2:00:02. But it was damp in some key places. I think the NT01s are good for an easy 1:56-1:57.

[1MOREMOD]

Originally Posted by bigjae1976

I know KWs on E46s had a larger shock body and a helper spring which interfered with wider tires. Not sure if that is case on the E9X...I believe Porschefile had some fitment issue.

The NT01s make a nice coo-ing sound at speed. I think they are good for 1 second per minute improvement right out of the box. Do be aware that they don't make noise until you are already sliding. So you need to feel the car, not hear it. Otherwise you'll be in for an oh shit surprise As with R-Comps...they like more slip angle but are not as progressive when they give up. Try not to understeer a lot in them because you'll wear them out pretty fast.

I replaced a set of RS3s with my NT01s. My best lap on the RS3s at Texas World Speedway, a fast 2.9 mile course, was a 2:00:03. My best lap in the NT01s was a 2:00:02. But it was damp in some key places. I think the NT01s are good for an easy 1:56-1:57.

good to know. i will have to change my driving style some to avoid the understeer. i figured the same about a second a minute roughly. my track is 1:40range so 1.5 or more maybe.

[bigjae1976]

The interesting thing I was told by a top notch instructor and accomplished racer is that R Comps have more grip. But drive it as fast as you did on street tires, just figure out those couple of places where you need to use that extra grip. Don't tear around the track because you'll wear them out really quick...which was what I was doing.

[1MOREMOD]

interesting. i kind of figured that but was planning on just tearing ass around at full tilt. maybe they will be still good for the 2 seconds without doing that. i have some sections in mind that would benefit from higher corner speed leading to better entry to the straights and significant time gained.

[Joe@ApexRaceParts]

Thank you for sharing the pictures chriszeh. Please post up some more once they are mounted on the car!

Originally Posted by Class-of-2013

So you test fitted (4) 18x10 ET25 w/ 275/35/18 to your car and it works well? No spacers?

18x10" ET25 is by far one of the most popular and easy to use track set ups on the E9X M3. That's the great thing about the E9X M3 chassis. Amazing grip is so easily achievable with an extremely easy bolt on lighter and wider 18x10" ET25 and 275/35/18 wheel and tire set up.

Originally Posted by M3PO

I don't think that this is true (or at least entirely true). I run 18x10.5 +25 square with 275 and 285 RS3s. While I am required to have a 5mm spacer up front with my KW sleeve kit, the previous owner of the wheels/tires didn't run any spacers with his KW CS coilovers.

The debate over whether the 18x10" ET25 and 275/35/18 will clear a KW Club Sport kit can sometimes be confusing. Inner strut clearance is very dependent on your current ride height (location of the spring perch relative to the wheel and tire) and tire type. If the spring perch is next to or lower than the wheel and tire than a 5mm wheel spacer will most likely be needed. The lower helper spring is usually the determining factor and unnecessarily extends the whole spring down much further than needed. The helper spring can be removed with out any ill affects as long as the spring perch is then adjusted all the way up to compensate for the change in the length of the spring assembly.

A summer 275/35/18 street tire will have a much higher chance of clearing the KW Club Sport's spring assembly compared to a larger running 275/35/18 extreme performance tire like a Hankook RS3 or R-Compound tire like the NT01.

Originally Posted by chriszeh

i have a 12mm on the rear and none on the front. sounds like i may be okay with what you are running? it will be close, my math is foggy. i think im 1mm more pushed out than you?

Using a 12mm wheel spacer in the rear with an 18x10" ET25 wheel is very similar to installing an 18x11" ET25 in the rear. The 18x10" ET25 with a 12mm wheel spacer will sit 1mm more conservatively on the car compared to the 18x11" ET25. The 18x11" ET25 wheel with a 295/30/18 tire is a commonly recommended set up by us that should not have rubbing issues and is usually reserved for those that have much higher power levels requiring more rear grip.

Originally Posted by bigjae1976

I know KWs on E46s had a larger shock body and a helper spring which interfered with wider tires. Not sure if that is case on the E9X...I believe Porschefile had some fitment issue.

That is correct, the E46 M3 Kw kits utilize a cone shaped OEM style front spring which significantly reduces and hinders front wheel and tire area. The E46 non-M kits utilize a helper spring, like the E9X M3 KW Club Sport kit, that also significantly reduces front wheel and tire area up front.

[M3PO]

Originally Posted by Joe@ApexRaceParts

The debate over whether the 18x10" ET25 and 275/35/18 will clear a KW Club Sport kit can sometimes be confusing. Inner strut clearance is very dependent on your current ride height (location of the spring perch relative to the wheel and tire) and tire type. If the spring perch is next to or lower than the wheel and tire than a 5mm wheel spacer will most likely be needed. The lower helper spring is usually the determining factor and unnecessarily extends the whole spring down much further than needed. The helper spring can be removed with out any ill affects as long as the spring perch is then adjusted all the way up to compensate for the change in the length of the spring assembly.

A summer 275/35/18 street tire will have a much higher chance of clearing the KW Club Sport's spring assembly compared to a larger running 275/35/18 extreme performance tire like a Hankook RS3 or R-Compound tire like the NT01.

I'm with you. Just to clarify, these were 18x10.5 +25 with 275 RS3s in both cases. He was running KW CS (dunno the status of the helper spring) with a modest drop and I was running KW Sleeve kit all the way down. That was the only difference. The wheel itself was hitting the collar on my car. No clearance issues for him.

[M3 Esq.]

Those things are meats. Keep us posted.

[1MOREMOD]

will do. first track day on them will probably be mid february if weather is cooperative.

[1MOREMOD]

ran the new set up today on almost full dry track. picked up 1.2 seconds with the nt01s on worse conditions than last week. had an instructor doing tire temps for me for part of the day as i came in which was useful. also had dennis today at the track. track buddy, show up in his f40! created quite a lot of traffic around us today. also had fun eating up a gt3 and 458 with newb drivers. most fun was session with r8 v10 just ahead and trying to hang.

[bigjae1976]

I have a theory...there is a significant benefit from heat cycling NT01s. More to follow.

[w00tw00t]

Originally Posted by 1MOREMOD

ran the new set up today on almost full dry track. picked up 1.2 seconds with the nt01s on worse conditions than last week. had an instructor doing tire temps for me for part of the day as i came in which was useful. also had dennis today at the track. track buddy, show up in his f40! created quite a lot of traffic around us today. also had fun eating up a gt3 and 458 with newb drivers. most fun was session with r8 v10 just ahead and trying to hang.

nice! v. nice!!!

jealous that I couldn't make it today.. looking forward to next weekend!!

[slicer]

Originally Posted by M3PO

I'm with you. Just to clarify, these were 18x10.5 +25 with 275 RS3s in both cases. He was running KW CS (dunno the status of the helper spring) with a modest drop and I was running KW Sleeve kit all the way down. That was the only difference. The wheel itself was hitting the collar on my car. No clearance issues for him.

My 18 x 9.5 et22 front wheels with Michelin PSS have 2-3mm of clearance to the spring. I also had a slight rubber mark on my springs when I removed my wheels. He must have either removed his helper springs or ran stock ride-height in order to make this work. Another possible explanation is that the tires are more stretched on the 10 and 10.5" wheels and that could provide more clearance.

[1MOREMOD]

here is the r8 v10 video. fun stuff. out lap was almost as fast as previous best lap set last week on ad08s.

[M3 Esq.]

You look pretty quick out there despite the conditions. Those retaining walls near pit out would make me nervous! Nice vid.

[1MOREMOD]

thanks it was a good time. im getting it. will do a more full write up in the future possibly but i think im on the slippery slope now if i wasnt before.

[M3 Esq.]

Slippery slope in terms of more mods? Yup I hear ya! I just sprang for a set of TE37SLs for my track wheels (write up to come). The first of many track related mods for me I'm sure. What's next for you? BBK?

[1MOREMOD]

Originally Posted by M3 Esq.

Slippery slope in terms of more mods? Yup I hear ya! I just sprang for a set of TE37SLs for my track wheels (write up to come). The first of many track related mods for me I'm sure. What's next for you? BBK?

Not sure what's next yet. I try to maximize my use at each new level. Eventually BBK, coilovers, seats, weight reduction, more camber, and even stickier tires. My plan is to run as is until next fall then reevaluate. Once at a certain level fighting for tenths is an expensive prospect. Luckily I'm not quite there yet.