My new OB / Racer in the making
05-04-2009, 11:01 AM
#31
Parts Specialist
Rennlist Member
Rennlist Member
let me know if I can help with those, I have access to a machine shop with small CNC or a friend who I could "farm them out to" with a full cnc machne in bonney lake. (but he charges money for work
though not much )Ed
05-04-2009, 11:14 AM
#33
Nordschleife Master
Adam,
You can get caliper rebuild kits for around $20. And it takes about 5-10 min to rebuild one of those calipers. That would stop the dragging.
You can get caliper rebuild kits for around $20. And it takes about 5-10 min to rebuild one of those calipers. That would stop the dragging.
05-04-2009, 11:53 AM
#34
Parts Specialist
Rennlist Member
Rennlist Member
05-05-2009, 11:30 AM
#36
Parts Specialist
Rennlist Member
Rennlist Member
OK you can flame me if you like BUT I did search... I found what OB was, that one thru me for a while. In doing so I came across a lot of CIS fuel topics. Can someone give me the long version of this acronym. Thanks - 
I am sure I should know this, but cant seem to figure it out.. could be my head cold that has my brain feeling like it fell out and is sitting in the chair beside me
Pehaps if I show some photoshop work.....
hahahahaha! ! ! turned out pretty good !
I am sure I should know this, but cant seem to figure it out.. could be my head cold that has my brain feeling like it fell out and is sitting in the chair beside me
Pehaps if I show some photoshop work.....
hahahahaha! ! ! turned out pretty good !
Last edited by ivangene; 11-07-2010 at 11:27 AM.
05-05-2009, 12:34 PM
#37
Racer
Join Date: Apr 2009
Location: The Evil Empire.
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OK you can flame me if you like BUT I did search... I found what OB was, that one thru me for a while. In doing so I came across a lot of CIS fuel topics. Can someone give me the long version of this acronym. Thanks -
I am sure I should know this, but cant seem to figure it out.. could be my head cold that has my brain feeling like it fell out and is sitting in the chair beside me
Pehaps if I show some photoshop work.....
hahahahaha! ! ! turned out pretty good !
I am sure I should know this, but cant seem to figure it out.. could be my head cold that has my brain feeling like it fell out and is sitting in the chair beside me
Pehaps if I show some photoshop work.....
hahahahaha! ! ! turned out pretty good !
https://rennlist.com/forums/928-foru...-of-an-ob.html
These are two threads about the usage of this acronym.
Or, did you just try to start another flame-war and I ruined it?
05-05-2009, 12:52 PM
#39
Three Wheelin'
Join Date: Nov 2004
Location: Gatineau/Ottawa Canada 84 928S triple black
Posts: 1,372
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05-05-2009, 01:20 PM
#40
Racer
Join Date: Apr 2009
Location: The Evil Empire.
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05-11-2009, 04:40 PM
#43
Rennlist Member
Thread Starter
Had my first track day in the OB this weekend.
I must say, I had a blast slinging the old gal around the Spokane Raceway (or whatever its called since the county took it over).
The OB is so much different than my S4, plus the fact that I've only had the car a couple weeks and wasn't very familiar with it.
So, took it very slow at first.
First impressions:
No Brakes. This car would be flat out dangerous in an emergency stop situation. It just doesn't like to stop, even at normal speeds. Track speeds required a lot of pre-planning of how to approach the braking zones on the track. Got a tip from another 928 track hound (thanks Keith!) that runs an '80 and he said to stab the brakes first, let off, and then hit 'em full on. Definitely helped to get the car to slow down quickly and a lot more predictably, still, OB brakes are not made for the track. In fact, with a decent set of calipers, and nothing else, this car would make a perfect DE car. So, the brakes get the thumbs down and will need to be improved before the next track day, probably putting on S front spindles and calipers will be my next step unless a killer deal comes up on a set of 17" rims.
The 4.5L motor is bomb proof. It went through the day with much less drama than my S4. No sky rocketing temps, no topping up with oil. The engine bay stayed totally dry, I didn't even have ATF sweating out of the PS reservoir. I'm in total disbelief. I didn't do anything to the motor except run some thin oil through it to get a sticky lifter unstuck, then refilled with Mobile 1 15w-50.
The torque band is totally flat. The S4 you can feel transition from midrange to top end, the OB is like driving a mini-freight train. Love the motor, no changes necessary before the next track day.
The 5 speed tranny is a little notchy, I was definitely coddling it but it shifted fine with the exception of a couple of 2nd gear downshift grinds where I was overshooting the rev match. Also got some more good advice from Keith (unfortunately just before my last run of the day) to leave a downshift out on part of the track and truck along in the higher gear. That saved an enormous amount of time and car had the low end to pull the higher gear - wish I would have figured that one out earlier in the day. Colin left me with one of his new short shifters, if John Davis takes a pass on it I plan on installing it and putting in some good gear oil (just have Pennzoil 80w-90 in there now) and see about double teaming with Tom M. and setting up an external cooler. No LSD, which I was definitely needing in some of the corners as the car is so light in the back, but at this point the tranny is track worthy and won't need the cooler before the next track day out.
Suspension wise, I have the stock OB suspension (still has cosmoline on the shocks and springs) with the exception of an S4 front sway bar that I threw on. With the car stripped and at an estimated weight of 2600lbs (?), the suspension was fine. I don't know what it looked like on the outside as far as body lean, but inside it tracked well, didn't wallow or porpoise, and was overall just very compliant. There are certain parts of the Spokane track that in the S4 (w/koni - eibach and 928 SP sway bars) I feel like I'm piloting a three legged stool, the car feels kind of "teetery" when negotiating the high speed dog legs. The OB was surefooted the entire way. No suspension tweaks needed at this time.
Light weight vs. heavy weight. I've gotten a full appreciation of driving a light weight car on the track with the OB. Because of the lousy braking, I was getting onto some terrible lines at turn in and would have been in really bad shape in the S4. The OB turned on the spot no matter how bad the line, and really kind of opened of the variety of lines you could take on the track and still be safe. The S4 has really only one line around the track with an option in maybe two of the corners, not true with the OB which will take the turns on the inside, outside, wherever.
Granted all of these observations are at a fairly conservative pace.
The car was an unknown quantity, and except for a couple of times when I've taken other 5 speeds out for a few laps, this was really my first track day in a manual tranny car, also the track was much more crowded then typical, so I really took my time finding the limits. It wasn't until the second to the last time out that I felt I was maxing the car out, and at that point the OB was a total hoot to drive. I think with good brakes it would give the S4 a run for the money.
So if anyone has ever thought about finding an OB, stripping it out, and then taking it to the track, I'd say go for it. You won't win any drag races down the front stretch, but with some decent brakes you will have an indestructable DE car, and great time!
I must say, I had a blast slinging the old gal around the Spokane Raceway (or whatever its called since the county took it over).
The OB is so much different than my S4, plus the fact that I've only had the car a couple weeks and wasn't very familiar with it.
So, took it very slow at first.
First impressions:
No Brakes. This car would be flat out dangerous in an emergency stop situation. It just doesn't like to stop, even at normal speeds. Track speeds required a lot of pre-planning of how to approach the braking zones on the track. Got a tip from another 928 track hound (thanks Keith!) that runs an '80 and he said to stab the brakes first, let off, and then hit 'em full on. Definitely helped to get the car to slow down quickly and a lot more predictably, still, OB brakes are not made for the track. In fact, with a decent set of calipers, and nothing else, this car would make a perfect DE car. So, the brakes get the thumbs down and will need to be improved before the next track day, probably putting on S front spindles and calipers will be my next step unless a killer deal comes up on a set of 17" rims.
The 4.5L motor is bomb proof. It went through the day with much less drama than my S4. No sky rocketing temps, no topping up with oil. The engine bay stayed totally dry, I didn't even have ATF sweating out of the PS reservoir. I'm in total disbelief. I didn't do anything to the motor except run some thin oil through it to get a sticky lifter unstuck, then refilled with Mobile 1 15w-50.
The torque band is totally flat. The S4 you can feel transition from midrange to top end, the OB is like driving a mini-freight train. Love the motor, no changes necessary before the next track day.
The 5 speed tranny is a little notchy, I was definitely coddling it but it shifted fine with the exception of a couple of 2nd gear downshift grinds where I was overshooting the rev match. Also got some more good advice from Keith (unfortunately just before my last run of the day) to leave a downshift out on part of the track and truck along in the higher gear. That saved an enormous amount of time and car had the low end to pull the higher gear - wish I would have figured that one out earlier in the day. Colin left me with one of his new short shifters, if John Davis takes a pass on it I plan on installing it and putting in some good gear oil (just have Pennzoil 80w-90 in there now) and see about double teaming with Tom M. and setting up an external cooler. No LSD, which I was definitely needing in some of the corners as the car is so light in the back, but at this point the tranny is track worthy and won't need the cooler before the next track day out.
Suspension wise, I have the stock OB suspension (still has cosmoline on the shocks and springs) with the exception of an S4 front sway bar that I threw on. With the car stripped and at an estimated weight of 2600lbs (?), the suspension was fine. I don't know what it looked like on the outside as far as body lean, but inside it tracked well, didn't wallow or porpoise, and was overall just very compliant. There are certain parts of the Spokane track that in the S4 (w/koni - eibach and 928 SP sway bars) I feel like I'm piloting a three legged stool, the car feels kind of "teetery" when negotiating the high speed dog legs. The OB was surefooted the entire way. No suspension tweaks needed at this time.
Light weight vs. heavy weight. I've gotten a full appreciation of driving a light weight car on the track with the OB. Because of the lousy braking, I was getting onto some terrible lines at turn in and would have been in really bad shape in the S4. The OB turned on the spot no matter how bad the line, and really kind of opened of the variety of lines you could take on the track and still be safe. The S4 has really only one line around the track with an option in maybe two of the corners, not true with the OB which will take the turns on the inside, outside, wherever.
Granted all of these observations are at a fairly conservative pace.
The car was an unknown quantity, and except for a couple of times when I've taken other 5 speeds out for a few laps, this was really my first track day in a manual tranny car, also the track was much more crowded then typical, so I really took my time finding the limits. It wasn't until the second to the last time out that I felt I was maxing the car out, and at that point the OB was a total hoot to drive. I think with good brakes it would give the S4 a run for the money.
So if anyone has ever thought about finding an OB, stripping it out, and then taking it to the track, I'd say go for it. You won't win any drag races down the front stretch, but with some decent brakes you will have an indestructable DE car, and great time!
05-11-2009, 05:05 PM
#44
The Parts Whisperer
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Try to get your hands on a 82-86 brake set up. It is a huge improvement and affordable. Kibort raced with them for years and when he went to the S4 brakes he said they were not much of an improvement . If you can't find them locally I can provide everything for $250 plus shipping.
