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Old Jul 10, 2010 | 02:52 AM
  #2231  
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Originally Posted by Random1,Jul 9 2010, 07:05 PM
Dave, if you DD your car you should practice the heel-toe down shift at every opportunity until it becomes a subconscious (second nature) behavior. It's actually much harder to do it when not at speed and hard on the brakes, so if you can get it on the street it will be awesome during autocross. If you don't DD your car well then just practice as much as you can off course.

I wish the rest of my driving was as good as my heel-toe down shifts!

This is exactly how I learned heel-toe, and still do it to this day as well.

Dave - as to your grip question, yes Lincoln has a ton more grip than Heartland Park, but I'm not sure how it compares to Forbes. I don't know if anyone was doing enough datalogging back in the Forbes days to compare, but that place had stupid grip(as long as you weren't crossing a crater).
Old Jul 10, 2010 | 07:59 AM
  #2232  
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Originally Posted by alvanderp,Jul 10 2010, 05:52 AM
This is exactly how I learned heel-toe, and still do it to this day as well.

Dave - as to your grip question, yes Lincoln has a ton more grip than Heartland Park, but I'm not sure how it compares to Forbes. I don't know if anyone was doing enough datalogging back in the Forbes days to compare, but that place had stupid grip(as long as you weren't crossing a crater).
To me it doesn't feel as grippy as Forbes. Forbes was the only place I have been to that feels grippier than Peru actually. I loved it there!
Old Jul 10, 2010 | 09:44 AM
  #2233  
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Just installed some RS3's this weekend for a local club event... I might be completely crazy, but it seems that the rolling diameter of the RS3 is much larger when compared to the dunlops. However, the RS3's seem to be narrower tires. I haven't actually measured anything precisely... and yes, the Dunlops are used... but I'm talking at least half an inch... maybe 3/4's of an inch (counting the tread that used to be there on the dunlops). The sidewall itself is visably taller on the RS3's. Does anyone have an actual rolling diameter comparison between the two?

Both are 255/40/17's... I'm just seeing a huge difference. I'm also concerned about rubbing now... I rubbed quite a bit with the dunlops and these RS3's fill up the wheel well quite a bit more.
Old Jul 10, 2010 | 12:07 PM
  #2234  
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I forgot to check when I had tires on both wheels when changing over, but I had a similar impression that the Dunlops were a bit wider. I had no rubbing issues after moving to the R-S3s.

Make sure you are not running too much rebound on the shocks. Ever since I moved towards more compression and less rebound I have not had any rubbing. That's been about six events now. Of course how much you are lowered/spring rates/FSB/alignment all affect this to some degree.
Old Jul 10, 2010 | 01:54 PM
  #2235  
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I just ran my first autox on the RS3's mounted on ap2 rims. Stock suspension other than Grendon front bar. I had a vey slight rub on the fender tab driving through a hairpin with a bit of a bump. Slight scuff on the fender tab but I cant even see it on the tires. Otherwise no issues.

Lowered I'd probably say a slight roll on the fender tabs up front would be a good idea. More camber might make it a non issue though. Im at 1.8 up front atm if I remember corectly.

I really wish they had this class sooner, I love the front end grip the car has now.
Old Jul 10, 2010 | 06:46 PM
  #2236  
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I just started my custom top mount project.

One down, three to go.
Old Jul 10, 2010 | 10:21 PM
  #2237  
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Speaking of top mounts. Maybe I missed some posts but I have some questions.

Ground Control and KW CS are both available, with GC being taller for the OTS Konis, and one version with Poly and the other with a bearing. Apparently Guy A. is developing a s2000 top?

I always though that shocks didn't need this, but reading here and reviewing the design it does look like there is some lateral movement and some vertical hysteresis.

Would a GC bearing top mount (with a torrington at the base of the spring) be ideal to eliminate any issues?
Old Jul 11, 2010 | 04:01 PM
  #2238  
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hey guys, I went autocrossing today and tested the alinment set-up I posted a couple pages back. Heres a video of a run without the rear bar connected and also a video of it connected. Commentary would be greatly nice.


The car was very loose with the rear bar connected and hard to control. It seemed to slide out rather then grip and lift a inside tire. I think the car grips alot better without it connected but I'm debating taking alittle rear toe out to help the car rotate better. What do you think?

ps- I'm on stock shocks with a solid bar

rear bar off-
http://www.vimeo.com/13253442

rear bar on-
http://www.vimeo.com/13253406
Old Jul 11, 2010 | 06:45 PM
  #2239  
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Josh, that's a tight lot! Wonder if skipping one of the downshifts would have let you position the car better.

We tried new coilovers/alignment/tires today as well, our first time on a non-stock setup. Left the stock rear bar connected, dialed the shocks up to full stiff, and got ready for a spin fest. If anything, the car was a bit more pushy than loose.

Setup: 255 kooks, 700f 560r, stock bars, 40 f, 38r. 1/8 toe out up front, 1/16 toe in at the rear. During the course of the day we knocked about 5 clicks off the rear shocks and lowered the front a quarter inch to get rid of some corner-exit push. We ran fronts as high as 42 and as low as 38, the rears from 32 to 38. Higher and balanced pressures seemed to work best.

We were still finding buckets of time at the end, a few tenths off Fastmike's Solstice (raw, anyway), a fat half second off the fastest STU car on a fairly wide open course.

I guess the question is, are we doing something fundamentally wrong with setup if it's NOT somewhat loose, or are we just not driving it hard enough?

I would NOT add a bigger bar to this as it drove today.

A little confused, as I really expected different behavior.


Old Jul 12, 2010 | 03:03 AM
  #2240  
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My first time out driving the STR setup in anger was this weekend, and the car was pretty benign with the exception of some power-on oversteer if I was too aggressive with the throttle inputs. Otherwise it was honestly a lot more composed than my BS car ever was. I found I like less pressure than most on the Hankooks. I tried 40lbs, and came down to 36f/34r in the end. From a feel perspective, not much changed from 40 to 34lbs, but the times did. Once I got below 36/34, the times started to get worse.



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