Obioban's 2005 IR/IR Coupe

[Obioban]

I'd like to hear your feedback on the 996/CSL brakes as I too want to FCP as much of my track consumables as possible! I'd really like to try out a set of 17x10 apex wheels on the 996 brakes to see if you can run continental take-off's or NT01's. I used to get 12-15 track days on NT01's on my E30 M3 which makes r-comps relatively affordable (compared to 3 days on RE71r's).

The 17x10 Apexs fit with space to spare over these. I kind of want to try the 17 x 9.5 et35s, as I don't actually like the et25 setup.

17x10 et25 brake clearance:

[S14]

Downgraded the brakes to 996 calipers with ZCP/CSL/Z4M rotors (so I can FCP my track rotors and pads). Not going to sell the brembos till I do a track event on these, but on the street they feel pretty indistinguishable from the Brembos. Which makes sense, since they're rigidly mounted brembo calipers with the correct bias/volumes for the chassis, but I still had some fears:

I'd like to hear your feedback on the 996/CSL brakes as I too want to FCP as much of my track consumables as possible! I'd really like to try out a set of 17x10 apex wheels on the 996 brakes to see if you can run continental take-off's or NT01's. I used to get 12-15 track days on NT01's on my E30 M3 which makes r-comps relatively affordable (compared to 3 days on RE71r's).

[Obioban]

Was the spring perch above your tire with your Ohlins setup?

Note entirely:

[Obioban]

Downgraded the brakes to 996 calipers with ZCP/CSL/Z4M rotors (so I can FCP my track rotors and pads). Not going to sell the brembos till I do a track event on these, but on the street they feel pretty indistinguishable from the Brembos. Which makes sense, since they're rigidly mounted brembo calipers with the correct bias/volumes for the chassis, but I still had some fears:



The front sway bar mount points tore off, so the car's off getting fixed for that (I don't weld well enough to be happy with my work on my car):



And the H&R coilovers arrived, that I'll be sending off to Fat Cats Motorsports for reworking. I go back and forth between being super excited and feeling like I've gone off the deep end, spending $5000-6000 for a non adjustable Bilstein setup

[r4dr]

Was the spring perch above your tire with your Ohlins setup?

[Obioban]

Turns out eibach makes a 6” long, 2.5” ID, 375 lb/in barrel spring, that they don’t offer except through GC... which will let me live my OCD to two decimal places.

(going with barrel springs up front because I want to have the spring perch above the tire, so I don't need as aggressive wheel offsets, but then need all the travel I can get (as that pretty much limits me to a 6-6.5" long spring).

[Obioban]

Wow. Definitely custom.

Are corner weights the real starting point for flat ride? I have fooled around with the spreadsheet, but I guess I need to see if FCM has posted a "how to use the spreadsheet" video.

Jesse

Corner weights are a good place to start, though probably not necessary if your car is close to stock. If you can get them, though, you'll be more accurate.

[D-O]

Wow. Definitely custom.

Are corner weights the real starting point for flat ride? I have fooled around with the spreadsheet, but I guess I need to see if FCM has posted a "how to use the spreadsheet" video.

Jesse

[Obioban]

I am wondering why you did not just re-valve the Ohlins dampers to match the required flat ride spring rate. Does FCM do more than just valve the dampers to match the springs?

Jesse

Yeah, he does a bunch more-- they'll be pressurized and valved to my corner weights and spring rates, bump stop tuning,and I'm having him add his KBO (similar but I believe superior to Ohlin's DFV) and ripple reducer.

[D-O]

I am wondering why you did not just re-valve the Ohlins dampers to match the required flat ride spring rate. Does FCM do more than just valve the dampers to match the springs?

Jesse

[S14]

Pictures just came in from last weekends NJMSP event...

Awesome!

[Obioban]

Nice. I'll be paying close attention, might end up going with something like that too from FCM. Will you be posting updates here or in a separate thread?

I'm sure you saw, but Shaikh of FCM made an account and wrote some interesting posts in the E9X subforum. I'm curious to hear more about his experience with JRZ/MCS/etc and why he wasn't impressed.

I'll be making a separate thread, but whenever I make separate threads about things I do to my car I also post them in my journal... so here, too.

[r4dr]

I'm going to use the H&R coilovers, as those use a non adjustable bilstein shock, but are height adjustable (corner balancable).

I had quad adjustable, remote reservoir JRZs and Motons on our e36 race car and was never particularly impressed. Conversely, moving the Ohlins to be flat ride was an absurd improvement that blew my mind. So… going whole hog, and trying the shock setup to match.

Nice. I'll be paying close attention, might end up going with something like that too from FCM. Will you be posting updates here or in a separate thread?

I'm sure you saw, but Shaikh of FCM made an account and wrote some interesting posts in the E9X subforum. I'm curious to hear more about his experience with JRZ/MCS/etc and why he wasn't impressed.

[Obioban]

Pictures just came in from last weekends NJMSP event...

[Obioban]

Given that FCM only uses Bilsteins last time I checked, does this mean you're ditching your Ohlins setup completely? Are you going with revalved B6 shocks or something from the Bilstein motorsport catalog?

FCM's insistence on Bilstein dampers is a weird stance (heh) to me given I can't imagine something like 2WR MCS shocks not blowing them out of the water with the same amount of setup, but I'm definitely going to give him the benefit of the doubt as he is a pro in this field and I know fuck all comparatively, lol.

I'm going to use the H&R coilovers, as those use a non adjustable bilstein shock, but are height adjustable (corner balancable).

I had quad adjustable, remote reservoir JRZs and Motons on our e36 race car and was never particularly impressed. Conversely, moving the Ohlins to be flat ride was an absurd improvement that blew my mind. So… going whole hog, and trying the shock setup to match.