Botond's Maintenance Log - KM08765

[RUS_ZHP]

That was some crazy oil top ups in the middle of the month. You had to add 1 litre every ~80 miles. Is that during your track days?

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[az3579]

How’d you like the Hankooks?

They're pretty awesome. They were a similar price to the RE-71R's, but after a 1.25-day track weekend (thanks to my car breaking down) they appear to have lots of tread left. The RE71-R's I think only made it 4 days before cording. They have fantastic grip even as you think you're approaching the limit. They do seem to like tire pressures in the mid-30's (hot) though another guy who's an 'expert' on R-S4's said that they actually perform well even into the low 40's hot. He says that the tires to like to overheat, so that's something to consider so you don't confuse the two. Personally I haven't had too much issue with the tires getting too hot despite being in the low-to-mid 30's for temperature (Celcius).

Edit: and the PFCs?

I absolutely love these pads. They have great pedal feel with good modulation characteristics. I find that I can module them pretty well as to not hit ABS, though I still hit ABS frequently enough because if you're not careful, they have an extra bite near the threshold that can send them into ABS territory. I found myself threshold braking only to get a tiny bit of extra grab at the end that made my brakes pulsate for one or two 'vibrations'. I had zero issues with brake fade (running BMW M3 euro semi-floating cast-drilled rotors and Wilwood EXP 600 brake fluid) despite the hot temperatures on track. The car isn't fast enough to really need much braking, so that's probably a factor in that.

That was some crazy oil top ups in the middle of the month. You had to add 1 litre every ~80 miles. Is that during your track days?

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Yeah, I had to top up a ton of times that weekend. I've never had such excessive oil consumption at the track; at most I'd usually top off once the entire weekend. I don't know what's going on, but I do know that consumption has gone back to normal now that it's just being daily driven.

[704sw]

Thanks for the info, BP. I’m ordering my PFC 08s as soon as Harrison Motorsports emails me back confirming my CCA discount. I know the 08 is more of an enduro pad, but as I mentioned when we were texting it’s the only pad PFC makes for these calipers.

Since I have blank rotors I’m running cooling ducts going forward. Not because I’m experiencing much fade, but because I’m trying to do everything I can not to cook and thus need to rebuild these calipers just yet lol.

[san]

Actually, they do need some love... I see a rebuild in my future. They're not really designed for the constant street use I put them through, especially for those nasty salty winters. The pad retention bridge screws are getting hard to turn due to the salty crap in the threads, and I had a hard time pushing a couple of the pistons in. Wilwood offers caliper rebuild kits, so one of those may be in my future. When that happens they may get some paint, but I do like the rugged anodized finish that stands up well to abuse, so haven't yet decided on that.

The good news is that everything Wilwood is dirt cheap. The whole caliper itself is only ~$180 with overnight shipping, as I found out the one time I had to replace one!

Their website has been a wealth of information:
https://www.wilwood.com/Calipers/Cal...emno=120-11132

BP do you have the above linked caliper on all 4 corners?


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[Sockethead]

Last time I looked on UUC's site, with the 15% promo, they had all 4 corners for $1,783 for black calipers and slotted 1 piece rotors... and free shipping

[az3579]

2018-07-26 -- 304,862 -- Alignment, tire balancing (rear)

2018-08-05 -- 305,726 -- Oil top up (1 liter, Shell Rotella T6 5W-40 Synthetic)

2018-08-23 -- 307,455 -- Oil top up (1 liter, Shell Rotella T6 5W-40 Synthetic)

2018-08-25 -- 307,698 -- Replaced differential (Diffsonline 3.46 3-clutch LSD, used); rear differential bushing (Qty (1) Febi, P/N: 33176751808); front differential bushings (Qty (2) OEM Lemforder, P/N: 33176770788)

2018-08-31 -- 307,821 -- Replaced differential fluid (Redline 75W110)

2018-09-08 -- 308,017 -- Oil top up (1 liter, Mobil1 5W-30 Synthetic)

2018-09-09 -- 308,175 -- Changed transmission fluid (Redline D4 ATF)

2018-09-18 -- 308,863 -- Oil top up (1 liter, Shell Rotella T6 5W-40 Synthetic)

2018-09-29 -- 309,509 -- Oil top up (1 liter, Shell Rotella T6 5W-40 Synthetic)

2018-10-03 -- 309,796 -- Replaced 6 spark plugs (OEM NGK BKR6EQUP, NGK P/N: 3199); both pre-cat oxygen sensors (OEM Bosch, Bosch P/N: 17215)

2018-10-13 -- 310,325 -- Rear axle boots replaced (Aftermarket Febi, P/N: 33217504524), axles regreased; Replaced fuel filter (OEM Kayser, P/N: 13327512019); Oil change (Shell Rotella T6 5W-40 Synthetic) with filter (Mann 925/4x)

2018-10-21 -- 310,753 -- Replaced idler pulley (OE BMW, P/N: 07119904677), tensioner pulley (OE BMW, P/N: 11281748131), hydraulic tensioner (Aftermarket), accessory belt (OEM Contitech, P/N: 6PK1538), A/C belt (OEM Contitech, P/N: 4PK863)

2018-10-28 -- 311,152 -- Oil top up (1 liter, Shell Rotella T6 5W-40 Synthetic)

[ZHPizza]

Any particular reason you replaced the o2 sensors? I have some sitting in the garage to go in, but am gathering some data from the old ones to see if they're malfunctioning.

Also, how are you liking the 3.46 on the highway?

[330i ZHP]

BP, did you ever get the running issues resolved?

[az3579]

Any particular reason you replaced the o2 sensors? I have some sitting in the garage to go in, but am gathering some data from the old ones to see if they're malfunctioning.

Also, how are you liking the 3.46 on the highway?

I replaced the sensors because they were way overdue by 20k- something miles. My fuel economy was suffering big time. This, in conjunction with a fuel filter, makes the car more eager to get better gas mileage. It still sucks compared to a year ago, but that's probably due to my clogged cats. It is definitely better though now that I addressed these items.

BP, did you ever get the running issues resolved?

Nope. I need catalytic converters at a minimum to restore power, and probably an engine rebuild to resolve the oil consumption. I'm going to replace the cats first to see if the power comes back. I will rebuild my motor regardless next summer. Such a long time to wait though...

[ZHPizza]

What's your cat plan? Sounds like a mighty convenient time for headers...