Obioban's 2005 IR/IR Coupe

[Obioban]

I have (finally) addressed most of my complaints with the Ohlins. Still have front tire clearance to go, but I think I have a solution for that as well.

The issue: The Ohlin R&Ts were optimized for the stock strut hats. Most camber plates (I believe all except maybe the TMS plates?) move the top shock mount point higher up. On lowered cars running stockish shocks, this restores bump travel lost by lowering the car, and doesn't have any negative side effects. On the Ohlins, which have shorter total shock travel but which are optimized to make the most out of the stock strut hat, this means you have too much bump travel (tire hits the fender liner under large compressions), very little droop travel, and a ton of preload assuming a reasonable ride height. The Ohlins only have 92.5mm of metal to metal stroke, so being off target can really screw up the setup.

I didn't go into this looking to recreate the stock strut hat geometry. My goal was to have ~4mm of preload, 40% of the travel be droop travel, and 60% of the travel be bump travel. But, when I was done, I happened to have a stock strut hat and realized I had exactly recreated the dimensions of the stock strut had. So, apparently Ohlins had the same design goals as me when they made these things, just not with a camber plate in mind :roll:

Anyway, made a delrin spacer and new rubber bushings for GC street camber plates that created that geometry, installed them this morning and HOLY HELL NOW THE OHLINS ARE WHAT I'VE ALWAYS WANTED THEM TO BE!

They ride nicely (for what they are), the car isn't too low, and the handling is kickass. It's been a long time coming, but I feel like I finally got them to where I always wanted them to be in ride and handling.

This also completely explains why other peoples experiences were so different from my own-- for those who were running them with the stock strut hats, this is what they have been experiencing all along!

One more trick up my sleeve yet to go-- The Vogtland springs I'm running are more resistant to coil bind than your typical spring (because they have less coils). I notice that at my current ride height I have ~1" of threads above my ride height adjuster. So, I'm thinking I'm going to order a 1" shorter spring, move the adjuster up an inch, ride height will be unchanged and I believe that should move the springs/adjuster above the tire, letting me run wide front tires like the TCKs.

I think. Need to throw her on the lift and verify the last bit before I order new springs.

After that, when they need a rebuild (not that long term of a thing with 35,000 mile rebuild intervals) going to measure corner weights and calculate desired frequencies, change the spring rates and have the shocks revalved to match while they're being built. Most likely will be going the opposite direction of everyone else and end up going softer :roll:

Anyway, I'm super excited already. Finally got the Ohlins to perform like I was always hoping they would/could!

[Obioban]

Found another half pound, though in an excellent location (all the way forward and above the COG).

Removed the engine hoist hook from the thermostat housing and put in some alu spacer rings of the same height. In 142,000 miles, I've never used the hook once, so I don't think I'll miss it much. I'll put it in my specialty toolbox, in case I do.

[Obioban]

I stuck the car on the work shipping scale, as she currently sits (only driver seat, no headliner or pillar covers, CF roof, Lithium Ion battery, stock drivers seat.

3062 lbs! (1/3 tank gas, no driver)

I'm pretty psyched. With some light weight seats, I think she'll be under 3100 lbs with full interior/back seats back in.

I am running out of places to take weight out of it, though (not willing to ruin civility or functionality)-- pretty much all I have left is front seats and cf driveshaft. I don't think I'll be making it under 3000.

A light weight muffler (SS street is nearly stock weight) and back seat delete would put me to right ~3000. But, no.
__________________

[Obioban]

Not having a car doesn't mean you can't mod it! :roll:

Wrapping the non sunroof headliner in alcantara...



Awwwwwwwwww yeeeaaaahhhh





I should really use a better camera than iPhone for this, but...

[Obioban]

Looks like I haven't updated this for a while

Quote:

Originally Posted by Obioban

[Obioban]

So, I ended up with a rather unique airbox by happenstance. I held off on the Evolve airbox because I wasn’t comfortable that, 50 years from now (at which time I still intend to own the car), it was certain that Evolve would still be around and I would still be able to source filters. A while back, Sal asked me if I would be interested in their development box, as it uses CSL filters. I said yes, and that’s what’s on my car. I had assumed till now that it was an Evolve airbox, just an earlier version, because it had the Evolve style ducting.

Yesterday it was brought to my attention by a fellow forum member that the box I have is actually a (pretty unusual/rare) Die Wethje airbox (Die Wethje was the OE manufacturer of CSL airboxes for BMW. They made several variants including the P54 (racing variant of the S54) version, the CSL version, the version my car has, one that has a bit larger/beefier with the big inlet, and possibly the one where the filter that slides in from the top.

I stopped by to visit my (still roofless) car, and sure enough it had the same stickers (this is not my airbox, just using the pictures as they’re the same stickers):





Pretty excited! I have nothing bad to say about the Evolve airbox, but actually having an OEM one makes me pretty excited!

[Obioban]

CF roof project begins.





Progress but ultimately frustration this evening.

Glass out:






Took the opportunity to key my car. Still amazingly painful to do, even when the panel is getting destroyed....




Sheeted off to protect it from metal shavings




Drill drill. Sometimes too far.






And then, with only a couple to go... tool failure



Couldn't find any locally. Ordered on amazon and will look more tomorrow over my lunch break. :banghead:

[Obioban]

Still get excited every time I toggle past the oil level display :P

[Obioban]

I picked up the M3 at the BMW performance center in South Carolina 10 years ago this month. Feeling old and sad the car isn't new anymore, but there's still nothing I'd rather be driving in the sub $150,000 range (and all of those come with compromises vs this)

First look:



These future winter beater wheels will never look this good again :P



Bling blau



The keys, give them to me



low miles are low



Well, might as well start modding. I'm going to need a hardwired iPod and V1 for the 10 hour drive home...



Park in from of the performance center






Then, two weeks later, first meet! Paint still looks stupidly good.










Here's to the next 50 years with it

[Obioban]

Quieting things down a bit. Went from vibratech to new stock engine mounts and ground control race to csl sways.



Went with the turner adjustable end links because they use the same (sealed) ball joints that bmw does on their links-- so should be quiet for a long time!



Also split a wideband 02 with some of my friends that can integrate with BMWlogger for road tuning.



I also in the final stages of preperation/part collection for the carbon fiber roof project. I'm kind of scared for that one :-/

[Obioban]

Phil, who took and is editing these photos for me, claims this is one of the worst he's editing so far from the shoot (he's been torturing me with teasers as he edits them, so I haven't seen much more than this :banghead: )


























































































































Some random extra stuff:














This cracks me up for some reason... :rofl3:









I promised Ian laser sharks for more excitement...







Thanks for looking. Happy Birthday Ian! :happybirthday:




.

[Obioban]

Fits over the m5 and m3's bbk, same rolling diameter as the m5 and m3 rears (so won't fuck up the LSD), fits on the hubs of all three cars (with a hub centric ring on the e91 and e46). Pulled a BMW trunk jack and wrench out of my dad's car last year before he traded it in. Going to throw it in the trunk whenever going on a long trip in whatever car we're going in.

Surprisingly excited

[Obioban]

Today's update...

Was hunting for a proper length 32mm socket for the chain tensioner, and stumbled upon this at pep boys. Seemed more specific than my general use assembly lube I was going to use, so I got it.



Removed some cams







Moved the cam position sensor thing over. That thing is on there TIGHT!



Lubed up and reinstalled the cams. Also used the APR/TT cam bolts, even though they're probably completely unnecessary.

[Obioban]

Cams time

Got most of the disassembly done, hoping to get her back together tomorrow night.

[Obioban]

Saw this today as I drove past BMW of South Hampton, and had to pull in...