Please bear with me while I ramble through this, will likely edit and modify this post MANY times:

• B16 turbo 350-375WHP (full weight car) - Weekend Warrior/Joyride with occasional trips to AutoX/HPDE/Time Attack
• 93 Si Non-ABS, 9.5" knuckles.
• Planning to use 15x8, 16x8, or 17x8 wheels
• Planning to use at least 225/xx/xx tires (Kaan has convinced me to try to get wider tires, likely 245)
• Other brake modifications: Honed booster delete, ITR 7/8" master cylinder, master cylinder brace, Honed air guide kit, MPC brake tuck & Wilwood prop valve

1. Are 11" rotors with Wilwood 4 piston calipers a worthwhile upgrade? I've seen a couple people comment that they don't perform that well at the track.
2. Fastbrakes offers 11.75" rotor kits, which would significantly limit my wheel options in 15" to basically only the TE37.

Wilwood 11" - https://jhpusa.com/collections/front...nt=40337668116
Fastbrakes 11.75" - https://www.fastbrakes.com/product_p...ic-1175-dl.htm
Fastbrakes/ASR 11.6" - www.fastbrakes.com/product_p/civap-cp9444-.htm - JHPUSA mentions the ASR kit only works with 10.2" knuckles, but Fastbrakes says only 9.5". I'd confirm first, but assuming Fastbrakes modifies something for the kit.

I'd really like to stay on 15" wheels 225/45/15, but I'm really not a big fan of the TE37. This would likely be the lightest and most performance oriented setup though.
Stepping up to a 16x8 or 17x8 would open up more wheel options, but is very subjective as to what would actually fit with consideration to caliper clearance.

Please let me know any thoughts/ideas on this, especially anyone with experience on either of the brake options I linked to above. If you've used the 11" or 11.75" kits, please let me know what wheel/tire you're using in combination with it.

ASR kit costs almost 3x the Wilwood 11.75" combo, but while cost is a factor I'm more concerned with whatever fits and functions best.

 

B series generally stick with the 15 inch wheels due to gearing... but you have GOBS of power... so it might not matter. 15s and 17s have better tire options (IMHO) than the 16s.

things to consider:
1. 225 wide tire is easily going to be overwhelmed by even the 11 inch wilwod kit (or anything larger)... you will require the best 200tw or R comp tire to effectively slow down that kind of power.
2. there is a 245 in 15 and 17... but 17s might have clearance issues (@dublocivic can chime in maybe)
3. your pad selection is going to be tricky... because you will need one that can slow this car down AND not over heat the pad/rotor/fluid. you are likely going to need ducting.
4. you have the power to turn the bigger and thicker rotors... do it.
5. everyone i know that runs wilwoods has to rebuild the calipers regularly... be prepared.

Both of the kits you listed use the Dynalite caliper... i believe you will want more... have you thought of using:
1. the Honed 986 kit? Its essentially an 11.5 inch rotor setup. i raced on it successfully... all be it with half the horse power. but spec wise its like as good as the fastbrake kit or slightly better.
2. ASR kit with AP calipers and two piece rotors... this would required a knuckle swap

 

Did I miss how the car is being used?

I know I have put this out here before. We are running an EG hatch with a stock K24 in endurance racing. We have the Wilwood DPHA calipers on stock size 10.3" rotors. We do run cooling ducts, initially to keep CV joints alive, but it helps the brakes too. We have not had any problems with the Wilwood calipers and have not yet had to rebuild them (a few hundred race hours at this point). We have tried many pads and keep coming back to Raybestos ST-43's. Our only problem if finding quality 10.3" rotors. We are currently looking into 11" Mini rotors with some caliper brackets to keep using the DPHA calipers.

 

I do have the Honed air guide kit to help cool the front brakes, forgot to mention that.

Thank you for your note about tire sizes. I'll consider trying to step up to a 245, though that would also likely require me to get a wider wheel.

I believe this is the same ASR kit you're referencing, but offered by Fastbrakes. They claim it will fit a 9.5" knuckle, so they possibly modified something - https://www.fastbrakes.com/product_p/civap-cp9444-.htm

I'll look into the Honed kit as well.

The car will be mostly a weekend warrior/joyride, or AutoX/HPDE/Time Attack vehicle. I won't be endurance racing it.

Thank you both very much for sharing experiences. I think I'm going to write out the 6 piston option and remove it from my OP, seems unnecessary.

 

Recently realized that I almost certainly won't be able to run the Honed air guide kit in conjunction with my traction bar. I'll choose one or the other, or possibly notch the air guides if it looks like I can still mount them and not chop off too much for them to be completely ineffective.

Current thoughts:

• Kaan has convinced me to try to find a wider tire, likely a 245
• Will most likely go with an 11.5"+ sized rotor (Honed/ASR/Wilwood)
• Will use Raybestos ST-43 pads if they work with one of the above calipers

Right now I think the ASR (even though it's expensive AF), or the Honed kit would be the best upgrade. I'm going to email Fastbrakes to confirm that their ASR kit would work on 9.5" knuckles.

 

I ran the Honed Kit on my EM1 and i run the same calipers as the ASR kit on my FG2... on both cars i ran ST43s.

I love my AP calipers, they are super bling... i did have a cross over pipe failure on my first outing (they repaired the caliper). but for the dollar, if thats a worry... the Honed setup (see the sticky at the top of the forum) is a great bang for the buck... and i think rock auto has calipers in stock now (which will make them dirt cheap).

 

Another vote for the Honed/986 here, especially if it's more for a weekend warrior car (I'm on the 9.5" knuckle also. Easy to acquire spare rotors/pads/etc. too.

The ASR kit would be awesome, if you really want to spend the money, The rotor volume is awesome on them (32mm thick!) but I'm not sure if that's terribly important outside of a (minimum) long sprint race. If you have the actual need for the ASR/AP setup, you probably have the need to get off of the 9.5" knuckle and its smaller wheel bearing too.

If you are looking for a cheap/done setup, I'm about 98% positive that you can use the Fastbrakes 11" bracket kit for 9.5" knuckles with the Wilwood DPHA and 282mm Mini or Corrado rotors. I had access to a used caliper at work to bring home for a mock-up but changed my mind and went to the 986 setup instead. The Wilwoods are $400 for the pair but when you start nickle & diming the other bits you end up almost at the same cost as the Honed/986 setup anyway, and I suspect I would have been disapopinted with the Wilwood pedal feel. They just aren't the stiffest caliper. The piston area is also pretty wrong (esp @ 282mm) and they don't stagger the sizes either.

Here's the Honed bracket installed, they're really nice and come already helicoiled too:

 

I'm seeing that the:
Falken Azenis RT660
BFG G-Force Rival S 1.5
Hankook Ventus RS4
Nankang CRS

All have options in 245/40/15 size, which is actually 0.3" shorter in diameter than a 225/45/15 but 0.7" wider. Unless someone says otherwise, I think that would be a good size to go with (245).

So, current plans, subject to change because I'm spastic:

• TE37 15" Wheels. Still deciding between 8" or 8.5", and +25 or +35 offset
• One of the above listed 245/40/15 tires
• Honed Brake Kit

Let me know if there's any objections to the tire size, or ideas about the wheel size. The 8" is confirmed to fit with the ASR kit on either a +25 or +35 offest, so either offset is an option (not sure which would provide better overall clearance).I could also potentially bump up to an 8.5" wheel if that would better suite the 245 tire, but that would also increase likelyhood of wheel rub.

 

We run the 245/15 Nankang on a 15x10, and a 205 in the back on a 15x8. The 245 is stretched a bit on the 10", but this is on a 100% race car and that does help control the tire better. For a street car I still think an 8" wheel would be too narrow, I'd go as wide as you can reasonably fit.

 

8.5" is as spicy as I think I'd like to go without really kicking myself in the teeth for clearance. I do still plan to drive the car on the street at times, it'll just never be a "grocery getter". Always on the back roads, on the way to a car show, or a race event.

Edit: I'm actually having a hard time finding the TE37's in 15x8.5 - They aren't listed on Driftworks or Fitment Industries, and if I check their website I can't see a sizing chart with offset options either. On EvasiveMotorsports the only TE37 set I'm able to find in 15" and 4x100 that's in wider widths is only at 8".

Edit2: I don't think Volk makes the TE37 in 15x8.5"

 

i would run 15x8 +35 for simplicity... assuming the +35 would fit out back without major fender work (i'm good with rolling and pulling personally). If you need more clearance up front you can just add a small spacer.

you will want to run a 205 or 225 out back. my EM1 i ran a 225 on a 15x7 +25 up front and a 205 15x7 +38 (i think) out back.

 

All four corners of my car have already been rolled and pulled, so we're good there. I'll try to figure out a staggered setup that would work, running thinner wheels and tires in the rear.

Can anyone find the TE37 in 15x8 +35? Or know where I could order them? I've tried searching and am surprised how hard they are to find considering they're such a popular wheel. Doesn't seem like they exist as 15x8.5"

The only other wheels that maybe might fit if I wish hard enough are Meister S1 2P wheels - I could get those in either 8" or 8.5", they do have an R-Disk "big caliper" option but the fact that ASR cites issues even with 6UL 15x10 wheels still requiring a spacer, or RPF1's in 15x8 needing a spacer, makes me think that the Meisters would be a wasted purchase and most likely not even come close to fitting.

 

Well, 6ULs are long out of production anyway so it doesn't really matter too much. I don't think I've ever seen an 8.5" TE either, at least not in a 15" or 16" diameter. For better or worse, there are so many variants now that I think you're going to just have to dig through the catalog to see what's what. There are definitely 16x8's in +35.

 

I'll stick with the TE37 4x100 15x8 +35, if I can even find those.

I really like the look of the Meisters, but considering they weigh ~10lb more per wheel and I think I'd be being really optimistic hoping those would fit against the disks and caliper.

Kosei K1 Racing in 15x8 would possibly be another option, but I can't find those either.

 

I run 15x8 +35 Te37sl's on my ek hatch, slight roll in the rear, running 225/45 Ar-1's and for next season a 245 up front. ICB still has the wheels as do many resellers on IG. Konig is another option for wheels they have 15x7.5-9/10 I think in different wheels for less tha nhalf the price.

As for brakes im running a wilwood kit, its meant for the smaller knuckle and is a 4 piston (smaller piston) with a 11" rotor. I run ducts to keep them cool

 

Have you checked with Konig's wheel offerings? There might be one wide enough with good brake clearance? I do believe they offer some 15x9 and 15x8 setups, not sure of 15x8.5.

Also the Enkei PF01 in 15x8 has a lot of clearance, however I am not sure how the clearance is rotor/caliper height wise, but width wise, they offer a lot of space. I think Eric Kutil ran a 15x9 Konig on his old hatch.

 

Cool to hear the 15x8 Volk's are working out for you, I strongly think that's the same route I'll go. They're confirmed to work, they're the perfect size (more or less), and they're light. I don't really want to take guesses with a $1K brake kit and $1500->$3K worth of wheels, or return shipping on that lol.

Also thank you for reminding me to properly check ICB's website. I've seen results from them just from web searches, but finally checked their actual web page and they have a ton of TE37's in the right size - https://www.icbmotorsport.com/4x100.html

Thanks ya'll, I'll check out Konig as well.

Edit: I do like how a lot of the Konig wheels look over the TE37s, and they have several 15x8 options. I think I even saw a couple 15x8.5 - So I'll probably look through a few of those (going to be busy today so it'll be later), if clearance seems possible. Either those or the Volks.

Edit2: I like these two from Konig, the Hypergrams are available as an 8.5" option as well but with only +25 offset. I'd have to do some research with either of these to find out if the Honed/Porsche brake kit would fit.

https://konigwheels.com/wheels/flow-...els/hypergram/
https://konigwheels.com/wheels/flow-...heels/dial-in/

I like the style of both of those wheels more than the TE37, they weigh about the same and probably cost a fair bit less so one of those two would definitely be awesome if I can confirm fitment.

 

I also have a set of Konig Free-form (now disco) 15x7.5 +35 that clear my brake setup. I have no doubt the hypergram/dekagram will also clear. Konig was smart about the design of these wheels with lots of room for bbk's

 

Worth pointing out that I don't think you're going to clear the suspension, front or rear, with any offset > +25 if you go over 8". My 6UL's are +36 and it is very snug to both the knuckles and the trailing arms. No way I could add that extra 1/4" of rim to the inside.

Honed also mentions '8mm spacer required for knuckle clearance, not necessary for caliper clearance" on reference to x9 and x10 6ULs. This may vary slightly with barrel shapes of different wheels and should be a little better if you go up on diameter, but your still asking a lot to jam that much wheel to the inside of the car.

I personally think that x8 is the most that works on these chassis, both aesthetically and functionally. x9 and x10 wheels pretty much require extended bodywork. Going lower than about +30 in the front starts to really make a mess out of the scrub radius and the drivability starts to go downhill quick. Obviously, if it's a race car, you jam as mush tire under there as the rules will allow and deal with the issues.

Konig has some really cool stuff at a good price point. Quite a different company than they were 20 years ago.

 

Yeah but I'll also be running an 11.6" rotor, so my fitment will be a bit tighter than yours. The Porsche calipers also look to be pretty big.

I'll probably get the clearance diagram from Honed and email Konig, see if they have any input.

Edit: If I can get these Hypergram in 15x8 +35 and clear the Honed brake it, that'd be sexy AF. With some obligatory red powdercoated calipers.

 

Thanks man. I'll stick with something 15x8 then, and yeah I'm aiming for ~35 offset or so.

 

Emailed Fitment Industries asking about brake clearance confirmation (Hypergram 15x8 +35 with the Honed Porsche brakes), will probably email Konig in a bit as well when I'm home.

So, 245/40/15 in the front on the 15x8, and I'm debating on 225/45 or 205/50 in the rear. There are no 7" Hypergrams, but they do also have a 7.5" +35 option so I'll run that in the back, just a question of how aggressive I want to go with the stagger, 225s or 205s.

Thoughts are welcome. Ill update with results when I eventually test fit the wheels, but probably at least a month out from ordering and getting it all on the car.

 

Konig responded but had issues getting the template open, tried sending them a PDF as an attachment so we'll see how that goes (for the Honed kit). No response from Fitment Industries yet.

If I went with the Honed kit, ideally I'd like to find a 2 piece rotor to use rather than the factory replacement Mini Coopers (is there significant weight savings by doing that?)

 

So for the 986 users..., what pad, for what chassis is ordered. Say with the honed 986 bracket using 10.2" or 11" rotors

 

986 pad in your brand/compound of choice.

You cannot use a 10.2"/11" rotor with thie Honed setup. It is only intended for the 294mm(~11.5") Mini JCW rotor.