Aussie 964C2 Maintenance Diary (pic heavy!)
06-30-2013, 04:23 AM
#511
Cold starting is definitely easier, and the idle is much smoother and more stable. It's much less easy to stall and the car's happier to mooch along at idle in slow traffic, with your foot off the throttle and no more kangarooing. Replacing the AFM helped remove that dead spot, but the adaptation has made it much more solid at low revs. I'll report back after a few more days, but so far the adaptation seems to have done the trick.
only about 1 in 5 people suggest that the adaptation makes no difference to their cars ... as always, just a reminder to any new readers, the 'spirited drive' adaptation is a load of crap.
06-30-2013, 04:30 AM
#512
Burning Brakes
Thread Starter
Yes you did, and i took your advice and requested it at my last service, but my local specialist couldn't do it...their "PIWIS" tester couldn't talk to my DME, and at the time it was suggested that maybe I had an aftermarket chip (I don't).
Scantool and T-OBD did the trick where PIWIS failed tho
Scantool and T-OBD did the trick where PIWIS failed tho
06-30-2013, 02:41 PM
#516
Nordschleife Master
07-20-2013, 03:31 AM
#520
Burning Brakes
Thread Starter
Lately I've been noticing a bit of a squealing noise on cold start (and I'm paraphrasing here...) which goes something like "yip-yip-yip-yip-yip" It seems to go away after a minute or two, but then one day the belt sensor warning light went off, but when I popped the decklid to check, everything was fine. Everything pointed to a dud belt sensor, so I decided it was time to investigate.
When I first looked in the engine bay of the 964 years ago and noticed that the fan ran on two belts, I figured it was a nice little double-redundancy from Porsche: should one belt break, the other is still there as a backup.
But actually that isn't the case. The alternator lives inside the fan housing, and is driven by one of the pulleys. The fan rides on a bearing (which then rides on) the alternator shaft, and that's what's being run by the second pulley. So while the fan is supported by the alternator shaft, it actually spins at a slightly different speed. If the alternator belt breaks, then the charge light will illuminate, but if the fan belt breaks...
...then there is this sensor which will trigger a warning light. It consists of a little spring loaded wheel, and if the belt breaks, the wheel pops out and triggers the microswitch which then illuminates the warning light on the dash.
To replace, it's really a 10 minute job. It's only held in by one allen head bolt, which is easy to reach. Oh by the way, I wholeheartedly recommend wedging a rag underneath it all, so that the bolt doesn't fall out and roll into that spot under the crank pulley (from which lost bolts and washers take hours to extricate).
Before I ordered a new one, I just pushed-in the belt sensor wheel of the old one by hand, and the wheel did seem to spin in a very notchy and gravelly way. The new one is noticeably more smooth, so I'd say the bearing on the old sensor wheel has had its day.
With the new one in place...no more squealing!
It seems to go away after a minute or two, but then one day the belt sensor warning light went off, but when I popped the decklid to check, everything was fine. Everything pointed to a dud belt sensor, so I decided it was time to investigate.When I first looked in the engine bay of the 964 years ago and noticed that the fan ran on two belts, I figured it was a nice little double-redundancy from Porsche: should one belt break, the other is still there as a backup.
But actually that isn't the case. The alternator lives inside the fan housing, and is driven by one of the pulleys. The fan rides on a bearing (which then rides on) the alternator shaft, and that's what's being run by the second pulley. So while the fan is supported by the alternator shaft, it actually spins at a slightly different speed. If the alternator belt breaks, then the charge light will illuminate, but if the fan belt breaks...
...then there is this sensor which will trigger a warning light. It consists of a little spring loaded wheel, and if the belt breaks, the wheel pops out and triggers the microswitch which then illuminates the warning light on the dash.
To replace, it's really a 10 minute job. It's only held in by one allen head bolt, which is easy to reach. Oh by the way, I wholeheartedly recommend wedging a rag underneath it all, so that the bolt doesn't fall out and roll into that spot under the crank pulley (from which lost bolts and washers take hours to extricate).
Before I ordered a new one, I just pushed-in the belt sensor wheel of the old one by hand, and the wheel did seem to spin in a very notchy and gravelly way. The new one is noticeably more smooth, so I'd say the bearing on the old sensor wheel has had its day.
With the new one in place...no more squealing!
08-12-2013, 08:24 AM
#521
08-28-2013, 08:57 PM
#523
Burning Brakes
Thread Starter
Time for new shoes!
The old tyres were Advan Neova AD08, which had seen 19,000kms and two trackdays. Here's the front.
...and the back. They've worn reasonably evenly, given that I've got 1.5 degrees of camber
I'd say I've been quite happy with them and they're certainly quite track friendly in that the outer shoulders don't get chewed up at all during a trackday. Wet grip was okay when they were new, but dramatically fell off once the tyre had aged a bit and was in the second half of its life.
So I'm going to be a Yokohama customer again, but this time, I'm getting the new AD08R: http://global.yokohamatire.net/produ...ova_ad08r.html
They look kinda the same as the old ones, but the new "R" compound is meant to be quite a bit faster around a circuit. But on the other hand, the word from some of the guys who've bought the new Rs are that they seem to last just as long as the old ones did.
I guess we'll find out! Just the same, I think I better get some laptimes in the bank while the rubber is still nice and fresh. Subjectively, they feel like a gummier compound than the old AD08, in that I'm now noticing that it's almost impossible to power oversteer in some corners where the old tyres did allow some slip.
The old tyres were Advan Neova AD08, which had seen 19,000kms and two trackdays. Here's the front.
...and the back. They've worn reasonably evenly, given that I've got 1.5 degrees of camber
I'd say I've been quite happy with them and they're certainly quite track friendly in that the outer shoulders don't get chewed up at all during a trackday. Wet grip was okay when they were new, but dramatically fell off once the tyre had aged a bit and was in the second half of its life.
So I'm going to be a Yokohama customer again, but this time, I'm getting the new AD08R: http://global.yokohamatire.net/produ...ova_ad08r.html
They look kinda the same as the old ones, but the new "R" compound is meant to be quite a bit faster around a circuit. But on the other hand, the word from some of the guys who've bought the new Rs are that they seem to last just as long as the old ones did.
I guess we'll find out! Just the same, I think I better get some laptimes in the bank while the rubber is still nice and fresh. Subjectively, they feel like a gummier compound than the old AD08, in that I'm now noticing that it's almost impossible to power oversteer in some corners where the old tyres did allow some slip.
