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Old 08-18-2009, 01:25 PM   #1
chimchimm5
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Default BMW 135i hotlap Laguna Seca

I'm curious to hear honest comments on the lines "RP" (the driver) took at Laguna Seca. It just looked to me that he early apexed several turns and pinched the exits as a result. I'm not saying I know better or am faster (which I'm not) but that's just what it looked like to me. With all due respect to Pobst, of course.

http://www.motortrend.com/av/feature...lap/index.html
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Old 08-18-2009, 01:33 PM   #2
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hmmm crazy, the body roll, powerband fell off at 6500 which i couldve expected, but the handing he was talking about with understeer seems kinda ****ty. I had an M3 and that thing was perfectly balanced all around.
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Old 08-18-2009, 01:37 PM   #3
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Never driven Laguna, but it looked fine to me. Also interesting to see how light his hands were on the wheel. I still sometimes catch myself in the dreaded death grip.
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Old 08-18-2009, 02:01 PM   #4
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His lines looked spot on to me. A late apex is the "safe" line that they try to pound into your head in driving schools but it's rarely fastest.
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Old 08-18-2009, 05:56 PM   #5
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his apexes look perfect to me..don't doubt the driving of Randy Pobst! :P
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Old 08-18-2009, 06:50 PM   #6
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I didn't see one early apex or pinched corner.
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Old 08-18-2009, 07:51 PM   #7
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What I see is a very pushy car on street tires. He's just not able to open the car up as much at track out as one would with a car that has had some work done to get rid of that understeer.
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Old 08-18-2009, 08:53 PM   #8
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Old 08-18-2009, 11:20 PM   #9
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Looks like a fine lap for a new car test drive. A qualifying race lap will use a bit more curb.
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Old 08-19-2009, 01:19 AM   #10
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I agree, the lines look like the fast ones for Laguna. The only one that might look pinched is Rainey (first turn after the corkscrew) but I think that if you stay wide you run a slower time because the outside is banked less than the middle/inside.
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Old 08-19-2009, 01:32 AM   #11
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when driving the zr1 he definitely shifts his hands around less and has a firmer grip on the steering wheel.
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Old 08-19-2009, 08:46 AM   #12
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Quote:
Originally Posted by Thom View Post
hmmm crazy, the body roll, powerband fell off at 6500 which i couldve expected, but the handing he was talking about with understeer seems kinda ****ty. I had an M3 and that thing was perfectly balanced all around.
Quote:
Originally Posted by cooleyjb View Post
What I see is a very pushy car on street tires. He's just not able to open the car up as much at track out as one would with a car that has had some work done to get rid of that understeer.
The handling really is just that crappy. My roommate has a 135i (sport package, ecu fooler for more boost, just about every option so its a heavy pig) and I'm shocked at how dead the car is when you move the wheel. There is no bite at the front, it just plows. He's tried 3 different tires (currently running Direzza * Specs). He's put on KW v3's and we've done 3 different alignments with them. Nothing seems to work.

Its disturbing that my WRX on stock suspension with snow tires has more responsive steering. I think we're going to add a front swaybar and perhaps some stiffer springs after that. I have a feeling we can improve the mid corner handling and increase exit speed, but the turn in is still going to fall short because you can't fit big tires in the front. He says a 235 is the biggest tire you can fit without modifying the fenders, and they come pre-rolled from the factory.


Regardless, its an amazing car and its fun to drive. You don't hear wind noise around the windows until you get above 120mph.
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Old 08-19-2009, 08:50 AM   #13
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Quote:
Originally Posted by Scooby921 View Post
The handling really is just that crappy. My roommate has a 135i (sport package, ecu fooler for more boost, just about every option so its a heavy pig) and I'm shocked at how dead the car is when you move the wheel. There is no bite at the front, it just plows. He's tried 3 different tires (currently running Direzza * Specs). He's put on KW v3's and we've done 3 different alignments with them. Nothing seems to work.

Its disturbing that my WRX on stock suspension with snow tires has more responsive steering. I think we're going to add a front swaybar and perhaps some stiffer springs after that. I have a feeling we can improve the mid corner handling and increase exit speed, but the turn in is still going to fall short because you can't fit big tires in the front. He says a 235 is the biggest tire you can fit without modifying the fenders, and they come pre-rolled from the factory.
Needs some front camber, possibly less rear camber. BMW decides to idiot proof all of their cars by giving them a bunch of camber in the rear and none in the front. Every modern BMW I've driven has this issue, and it almost defeats the purpose of the perfect weight distribution. It sounds like your friend's issue can be fixed with an alignment. IMO even the stock 135 has great steering feel/response, it just wants to understeer as you approach the limit.
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Old 08-19-2009, 11:06 AM   #14
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Quote:
Originally Posted by Scooby921 View Post
The handling really is just that crappy. My roommate has a 135i (sport package, ecu fooler for more boost, just about every option so its a heavy pig) and I'm shocked at how dead the car is when you move the wheel. There is no bite at the front, it just plows. He's tried 3 different tires (currently running Direzza * Specs). He's put on KW v3's and we've done 3 different alignments with them. Nothing seems to work.

Its disturbing that my WRX on stock suspension with snow tires has more responsive steering. I think we're going to add a front swaybar and perhaps some stiffer springs after that. I have a feeling we can improve the mid corner handling and increase exit speed, but the turn in is still going to fall short because you can't fit big tires in the front. He says a 235 is the biggest tire you can fit without modifying the fenders, and they come pre-rolled from the factory.


Regardless, its an amazing car and its fun to drive. You don't hear wind noise around the windows until you get above 120mph.
Running a staggered setup on a car with 50/50 weight distribution is going to produce understeer without significant suspension work (and compromises). If he tracks the car a lot, modify the fenders.

In all honesty, 235's all around would be more fun to drive.
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Old 08-19-2009, 12:50 PM   #15
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Quote:
Originally Posted by chimchimm5 View Post
I'm curious to hear honest comments on the lines "RP" (the driver) took at Laguna Seca. It just looked to me that he early apexed several turns and pinched the exits as a result. I'm not saying I know better or am faster (which I'm not) but that's just what it looked like to me. With all due respect to Pobst, of course.

http://www.motortrend.com/av/feature...lap/index.html

Did you not notice all the red paint on the curbing at the apexes? The paint that he hit just about every corner.
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Old 08-19-2009, 03:11 PM   #16
elirentz
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I highly doubt there is anyone on this board that could be competitive with Randy Pobst he's got quite a resume. Whatever line he chooses I would say was a fast one for the car he was in.
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