Looking good Carl, once you get the suspension set up better so you can drive the corners harder and get the heat off the feet issue taken car of I am sure that it will be a lot more fun.
I was actually surprised at how it was not sticking in the corners better.
Different rubber may help, but I know nothing other then street.

Its always a good day when you can drive it onto the trailer without damage.

 

I can only wonder what the poor guy in the Audi was saying as he caught up and passed four times only to have Carl power around him on the Bonneville parts of the track. He had to be quicker on all the rest of the track to be in position to keep making that pass ! Made for an entertaining video.

 

Another video of the GTS race and what a fast lap looks like !

www.youtube.com/watch?v=UYpZ40LOCYk

Gman Sunday 6-9-12.wmv - YouTube






► 10:35► 10:35

www.youtube.com/watch?v=UYpZ40LOCYkNew2 days ago - 11 min - Uploaded by cstreit911
NASA GTS Race at Gingerman Raceway. Chris Streit #15 2001 Porsche GT3 Cup. ... Published on ...

 

You may not understand how much seat time it takes to shake out a new car. I have new wheels, tires, brakes, shocks and shock mounts this season. And when I say "new" I mean different, not just new. The only thing we kept was the spring rates and the stabilizer bars from last year.

At this, our 3rd outing this year, to break track records that have stood since 2010 by more than 2.5 seconds.... well that's more than I hoped for. As we go to more events, and specifically now that we are going to start addressing the understeer, I expect to only get quicker.

 

Congrats Carl, way to represent! Enjoyed the video very much, and your explanations during the video of your understeer. Good Luck as you continue to fine tune your car.

 

Thanks, Guys.

We have been running 700 lb fronts and 400lb rears up to this point, and after this Gingerman event I just ordered up 850 lb fronts and 450 lb rears. There was a track photographer present (as usual) and his track-side pics show too much body-roll for my liking.

I'm going to try to get her a bit flatter in the corner (and cure some understeer) with springs first without adjusting my sway bars further. We'll see how that goes.

 

The 911 is really fast but when getting into other classes running
the same courses the American cars have some very impressive times.
Just look at same courses on the Corvette,Viper and the Mustang in classes like
American Iron Extreme,Super Touring 1,Super Touring 2
Chris Griswold's Mustang has some of the best times around on alot of tracks.
Now those are some really fast laps.
Other American cars are in
Super Touring 1
Super Touring 2
Those times are impressive also.
I like the 928's,as 911's and American cars like Mustangs and Vettes.
There is not one car that is best at everything but one thing about American cars
they can compete in road racing,oval track and are great cars for drag racing.

 

Seat time is everything when building and setting up a new track car. One of the most difficult aspects for me has been figuring out what my *** is telling me. Without the years of experience needed to "know" what to do next, some of the fixes seem counter intuitive: more sway bar or no sway bar, more spring or less spring, etc. etc.

Regardless, getting out there with a new car and putting it door to door when there are mucho lots of $$ invested is to your credit. Agression will come with understanding your cars capabilities. Congrats!

 

it takes almost nothing if you have the specs for what works.

I could take your car, set it up in a few hours and it would be ready for Mark or I to run at the front of the field. The problem, folks try and re invent the wheel. when i started racing, i found out what the fast guys were doing and did exactly what they dd and then improved from that point forward.

you set your ride hight , alignment weight and balance to what we know works in the other major areas, and you will have a screamer from lap 2. I built my black car from basically the ground up, and it turned only 2 seconds lower than my best time ever at thunderhill on crappy test tires and no aero. with it bolted on, equaled my best times, the very first day.

Ive seen guys chase their tails for full seasons.

 

Carl, great video. the car sounds beasty!!

Now, you speak of understeer, oversteer and a lot in your naration, most all of it is your approach to the turns, and your hand posiions.

you have to stop going inside on the compeitors there, where you dont have a chance to make a pass, drive the line and then get in the proper gear for a better exit. you were not able to hang with the bmws, not because of understeer, but because of car position and attitude, approaching, into and arond the turns. (as you were narrating this in the video)

Now , trust me on this one. get those hands taped to the steering wheel at 2-10.(yes, tape the hands !! and leave it in 3rd or 4th gear) you willl be 2 seconds faster , guranteed! ) well, dont tape your hands, but you have to stop with the shuffle steering you. its killing your control and feel to put the car on the edge. downshifts before the turns are essential for rear wheel braking and car attitude going into the turn, as welll as arond and exiting the turns.

the car looks good , sounds awesome and has so much powre you are not even using. thats why you can just put aound, and blow by anyone that is in front of you with a short straight.

Anderson will help you dial the car in, but you have to fix the steering wheel part. trust me, you will thank me a year from now. and you will save the car from danger as you grow into it.

 

If all you are doing is moving the exact same parts (Koni's, springs, tires, wheels, bars, etc.) from one 928 to another, maybe.

But we aren't that lucky. We made wholesale changes to the car this year and they are still playing out.

I disagree with your claim that you could tune this suspension that fast. I submit the only way you could be done in 2 hours is if you have a low satisfaction threshold that once you are over, its "done"

IMO - its never "done" and the car can always be faster. Hence, the suspension setup is always being tweaked - even if only just from one track to another.

 

You are right about this, its an old habit and hard to break. Its on my list of old techniques that I am trying to re-learn. It was actually taught to me in a high-speed drivers course I took for heavy equipment (I know, sounds weird) when I became licensed to DRIVE the ambulance as well as just be in it as an EMT. They stressed the shuffle technique, and now I need to un-learn it.

Like left-foot braking... a big NO! back in the day when I started, now proven to be faster. And I'm trying to drop the old habit, and trail brake into the corner and then modulate off the brake while the right foot is also accelerating in the transitional stage.

I'll get it.... I'll get it. Need more seat time.

 

Mark Kibort thank you for your comments, no one has made or watched more 928 race video than you ! Good to read a pros evaluation of what was really being shown.

 

What is being shown is the result of Carl's hard work of actually travelling the upper Mid-West racing his self-prepared 928.

Versus the rest of you internet hereos and DE pro's playing bench jockey thinking you could do a better job.

I know what it takes to do what Carl is doing. Why? I was there supporting a three car Corvette team. A team that holds multiple lap records, overall (not just class) wins and a national championship.

Kibort - wake me up when you actually win a race. You should team up with your best friend VR and start getting paid for your advice.

As for your lap record calculations, the national champion on our team holds the Road America record for his time trial class in a stock ZO6 turning a 2.26.xx with 255 DOT's on all for corners. This car still has the interior, stock brakes, leaf springs, full exhaust etc....

 

Carl
Same issue for me learning to drive cop cars....I still shuffle steer a bit......but MK is right....the thing I noticed is our steering is just a bit too slow during the tightest slow speed corners...you need more steering than 10-2 can comfortably provide.....

Left foot braking is a mystery to me....never tried it on track...even in the Estate (automatic).....I am still trying to figure out heel-toe downshifting....