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PostPosted: Fri Apr 03, 2009 12:55 pm 
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ChristopherLin wrote:
hmm not sure if i'm gonna go anymore, got some schoolwork to do.

even with my rear anti-sway, the car is still really tight, but it did increase front end grip by a lot.


how big of a bar is it?

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PostPosted: Fri Apr 03, 2009 2:28 pm 
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BriceJohnson wrote:
ChristopherLin wrote:
hmm not sure if i'm gonna go anymore, got some schoolwork to do.

even with my rear anti-sway, the car is still really tight, but it did increase front end grip by a lot.


how big of a bar is it?


22mm...and i'm already getting inside rear lift...i need more front tire

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PostPosted: Sat Apr 04, 2009 7:53 pm 
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I'll be there too

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PostPosted: Sun Apr 05, 2009 8:33 pm 
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I had a great time this weekend between instructing on Saturday and running on Sunday. I struggled to get the balance of my car really well. If it was stable in the transistions it pushed too much in the sweepers and if it rotated in the transistions it was tail wagging through the transistions. I put down some decent times but nothing spectacular. Here is the video of my fastest official run. I went a 1/2 second faster on my one fun run which kind of annoyed me.

http://www.youtube.com/watch?v=48wEdyLWMrc

I also wanted to congratulate Chris on driving the wheels off of his Fit as usual. You can really drive that thing considering how close to stock it is.

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PostPosted: Sun Apr 05, 2009 8:58 pm 
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It was fun, I got to drive the mini at an event for the first time, and managed to win STX. It was a GREAT course for the car, definitely a "power" course with lots of speeding up and slowing down. That car is a totally different beast than mine, I'm gonna miss the LSD and extra 50 hp next time I drive my car. . .

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PostPosted: Sun Apr 05, 2009 9:16 pm 
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thanks for the kind words keith.

yea my car also seemed to handle differently at different parts of the course also...probably from the changing surfaces and the few large dips in the runway. i actually had to countersteer at one point under lift-off :shock:

i will soon be kicked from this forum :(

i will also be moving in a few months, and won't see any of you again unless i decide to visit during an autocross weekend, or any of you come to events near DC...

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PostPosted: Wed Apr 08, 2009 10:50 am 
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Note to self: year old A6s with 135 runs on them go away very quickly. It felt good to get back in the saddle again tho.
Christopher, best of luck wherever you go. DC region will give you plenty of guys (and gals) to run against, and The stadium lot is a real fun venue with lots of space for big courses and lots of elevation changes to keep it interesting. I hope we will see you there once in a while.

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PostPosted: Wed Apr 08, 2009 11:25 am 
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Looks like a good drift course, from Keith's video - can't really tell what the speeds were, though. If those offsets weren't too tight, I would've had some fun. Didn't feel good when I woke up though, so I skipped. Hopefully the Jimmy V weekend will work for me. Sorry about having you take those top mounts, Keith - I'll get them at some point, I promise!


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PostPosted: Wed Apr 08, 2009 12:25 pm 
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ChristopherLin wrote:
thanks for the kind words keith.

yea my car also seemed to handle differently at different parts of the course also...probably from the changing surfaces and the few large dips in the runway. i actually had to countersteer at one point under lift-off :shock:

i will soon be kicked from this forum :(

i will also be moving in a few months, and won't see any of you again unless i decide to visit during an autocross weekend, or any of you come to events near DC...


Damn, good luck in DC, go scare them all up there and visit anytime

Rob


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PostPosted: Wed Apr 08, 2009 12:30 pm 
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Chuck Frank wrote:
Note to self: year old A6s with 135 runs on them go away very quickly.


x2. Our Hoosiers were cording on our 2nd runs. These were last years takeoffs from the Crossfire in non-optimal sizes (285 front 295 rear vs. 295 front 325 rear we used at Dixie). The Crossfire's lack of camber created the "shoulder of death" and even the Corvette's good camber curve couldn't correct it.

We've decided to really work on the front bar to increase the roll stiffness. I am making the trip to pick up 3 new front bars from Addco next week. A 32mm tubular, a 35mm tubular and a 35mm solid. We currently have a 30 mm tubular that is about 20% stiffer than stock, and aside from the tires cording, we've never had push in the car, and throttle on oversteer is still prevalent. Nothing that a huge bar up front won't fix ;)

We're going to test out the new bars at the Lincoln ProSolo in a few weeks. We'll start with the 35mm solid and work down from there each session until we find the sweet spot for the site. Considering we're not going to run the ProFinale or the Tour Finale this year (we both have previous commitments), this year is a big test session 8) - AB

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PostPosted: Wed Apr 08, 2009 12:34 pm 
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ChristopherLin wrote:
thanks for the kind words keith.

yea my car also seemed to handle differently at different parts of the course also...probably from the changing surfaces and the few large dips in the runway. i actually had to countersteer at one point under lift-off :shock:

i will soon be kicked from this forum :(

i will also be moving in a few months, and won't see any of you again unless i decide to visit during an autocross weekend, or any of you come to events near DC...


Best of luck with whatever you do Chris. I am glad we were able to keep in touch after highschool.

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PostPosted: Wed Apr 08, 2009 1:40 pm 
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Kevin Allen wrote:
Looks like a good drift course, from Keith's video - can't really tell what the speeds were, though. If those offsets weren't too tight, I would've had some fun. Didn't feel good when I woke up though, so I skipped. Hopefully the Jimmy V weekend will work for me. Sorry about having you take those top mounts, Keith - I'll get them at some point, I promise!


The course was probably in the 50 mph range most of the time. I hit the limiter which is 59 in my car coming out of the lane changes near the end of the course on my fast fun run.

I will have the top mounts with me on Sunday at the Jimmy V event if you are going to be there Kevin.

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PostPosted: Wed Apr 08, 2009 4:20 pm 
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I hate working the course at autox and I must tell you about it, often.

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Aaron Buckley wrote:
We've decided to really work on the front bar to increase the roll stiffness. I am making the trip to pick up 3 new front bars from Addco next week. A 32mm tubular, a 35mm tubular and a 35mm solid. We currently have a 30 mm tubular that is about 20% stiffer than stock, and aside from the tires cording, we've never had push in the car, and throttle on oversteer is still prevalent. Nothing that a huge bar up front won't fix ;)
- AB


Have you considered T1 front bar? They do work well on track, and felt pretty good at AX. Or the Pfadt street or fatty. I run T1 bars on the Z06. I have the old style that is not adjustable with heim-jointed end links. I know you can't touch the back one. The newer T1 for the C6 has 3 adjustment holes in it. I believe the bar is 38mm front. It's a fat forker and took 2 of us to get the thing in. The rear is only 28mm. No push with staggered tires. Fairly planted in turns and improved mid turn acceleration nicely. You can still break the rear loose at will in slow turns. It's designed for the T1 springs and shocks but i found with stock C5 Z06 shocks and springs it works well.

Just a thought. Good luck.

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PostPosted: Wed Apr 08, 2009 4:59 pm 
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Graham Jagger wrote:
Have you considered T1 front bar? They do work well on track, and felt pretty good at AX. Or the Pfadt street or fatty. I run T1 bars on the Z06. I have the old style that is not adjustable with heim-jointed end links. I know you can't touch the back one. The newer T1 for the C6 has 3 adjustment holes in it. I believe the bar is 38mm front. It's a fat forker and took 2 of us to get the thing in. The rear is only 28mm. No push with staggered tires. Fairly planted in turns and improved mid turn acceleration nicely. You can still break the rear loose at will in slow turns. It's designed for the T1 springs and shocks but i found with stock C5 Z06 shocks and springs it works well.

Just a thought. Good luck.


We would have bought the Pfadt bar, but stayed away from it for a few reasons. While adjusting on the car without swapping the bar would be nice, the Pfadt bars arms (splined) have had issues with breaking in the past with autocrossers... and they tend not to break at good times (ie mid event). Secondly, the bar is expensive for what it is at $550 for just the front (packaged with a rear is $840, but we can't change rear bars). Addco bars are around $160 -$200 each new and they're selling them to us for $100 each brand new, with 3 sets of heim joint links and all the bushings. So for $300, we end up with a host of swaybars for different applications and can figure out the best one for each site. Changing it on the C6 takes no more than 15 minutes.

The Z51 C6 has slightly softer rear springs than the C5 Z06 (exact same front rates), but has a 45% stiffer rear bar stock, so I think we will be able to go a lot stiffer up front than those with the C5's.

One thing we are struggling some with is the ride height rake. As some people know, the C5 Z06 and all of the C6's (except base suspension) have ride height adjustment from the factory. With the C5's, they try to lower it such that you have 1/4" higher rear height than the front, thus acheiving what's deemed the optimal rake. In the C6, it's unknown what works best. We slammed it to the ground, but after putting zip ties on the shock rods (using Pfadt inverted sport shocks) and found that we are running out of travel up front and are hitting the bump stops. Even with that, the car doesn't seem to push.

For Lincoln, we will put on the different bars and see how this is affected, then adjust as necessary. We're trying not to change more than one thing per event, which is a welcome change ;) - AB

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PostPosted: Wed Apr 08, 2009 10:14 pm 
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I hate working the course at autox and I must tell you about it, often.

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Aaron,

Pfadt has supposedly fixed that. And yeah they are proud of their bars. New T1's are about as expensive. I got mine used and bought new end links. The price you got on the Addco bars would be hard to pass up.

On the rake. 1/4" is the default but some go 3/8" or closer to 1/2". It depends sometimes on how well you can do corner weights. I corner weighted the car 1st with the end links disconnected. Get it as close as I can to even cross corner. Then take what I can get for rake. I'd rather have it balanced. For high speed it does come into play more. But a quick cheap fix on the Z06 cuts the lift out of the nose that the rake helps offset. Too much rake and the damn things get really squirrely under high speed braking. Slamming a C5 Z06 on the factory adjusters will cause problems with the Sachs shocks. They will bottom out. When I picked up this second Z06 the previous owner; cut the bushings in the front, installed longer bolts in the rear, and slammed the car, and had it aligned to 0 everything. Then installed 19" CCWs. Looked cool but handled like crap. I fixed that with T1's, coil-overs, corner weight, and alignment. Much better. And now with these coil-overs I can set ride height independent of shock travel. So I can get as low as I dare to clear the tires.

Graham

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