Mark Stielow's 69 Camaro, Red Devil

[Stielow]

Originally Posted by parsonsj

That response about the ABS was helpful. Thanks!

jp

Once I know all the bugs are worked out I can tell more. I'm still in the development part of this program. I do not want to give advice to people on brakes. If it goes bad it can go real bad. I have been pitched off track a few times due to ABS glitches. I want to know it works very well before I tell how I did it. It is still a WIP (Work In Process). Once I have sorted it out I'll let the Lat-G guys know.

Mark

[parsonsj]

Originally Posted by Stielow

Once I have sorted it out I'll let the Lat-G guys know.

Sounds awesome.

jp

[Stielow]

Originally Posted by parsonsj

Sounds awesome.

jp

Well so far I have a 60-0 mph braking down to 107 feet

I need to look at breaking in a turn and split Mu.

Stielow

[parsonsj]

For those who don't know what "split Mu" is (like me 5 minutes ago ):

when a vehicle attempts to brake on a surface with uneven friction coefficient such as on wet or icy roads it is called a split Mu scenario

But 107 feet sounds good. Real real good. Thanks very much.

jp

[jimbo]

For comparison to the 107 feet.
I found this from a 2009 ZR-1 Corvette test.
"A set of carbon-ceramic brake rotors are included as one of the Corvette's most notable upgrades, and they're no joke. They provide enough bite to haul the ZR1 down from 60 mph to a stop in just 96 feet, an amazingly short distance matched only by the $192,000 Porsche 911 GT2."

[Bow Tie 67]

Originally Posted by parsonsj

For those who don't know what "split Mu" is (like me 5 minutes ago ):

when a vehicle attempts to brake on a surface with uneven friction coefficient such as on wet or icy roads it is called a split Mu scenario

But 107 feet sounds good. Real real good. Thanks very much.

jp

Hmmm I'll assume thats what caused the 4th gen F-bodies to plow through corners on the track. I have heard it called " Ice mode ". Basically when you introduce race rubber and hard braking on the track the computer was confused on the what to do and released the brakes.

Mark do you know if the newer generation software was calibrated to a different outcome? I would assume so as I have not heard about vettes having this problem.

[Sales@Dutchboys]

We were just glad to be part of such a great project! Looking forward to seeing the car again at LS fest in a few weeks. and...you still owe me a ride! lol

Paul

[Thomo5150]

Hi Mark, its a bit off the subject but I just read a few posts back that your a GM Suspension Engineer. Just a quick question, I'm doing a C5 drivetrain conversion here in Australia to a Holden Ute. I'm modifiying the Holden chassis for the C5 cradle. I'm working out cradle height at the moment, could you tell me if the cradle is level to ground or is it tilted back some degrees when installed in the C5?.

regards Tim

[Stielow]

Well I did my first SCCA AutoX today in 15 years. It was just liked I remembered. Due to the fact I haven’t been to a Detroit Region SCCA AutoX in a long time I sent the “Director” of AutoXs an email as to what I should do. He said you HAVE to be there before 8:00 to get teched and the first car would be on track at 9:00. OK! I got up at 6:30 this morning got ready and hit the road in my car with visions of cones in my head. I got to the parking lot at 7:45 sharp to see 6 other cars in the parking lot? OK so now I’m here let’s get teched. Some old guy looked at my car for 30 seconds and put a green dot on the windshield and a sticker on my helmet. OK now it is 8:00 LET’s GO because I’m excited. Not so fast you need to go register. OK LET’s GO. I went over and stood in line. When I got to the front of the line the grumpy SCCA lady said I need to see your SCCA card. I said well I registered on line and I didn’t bring it with me. Well after some phone calls I got my number and I was READY to go. At 9:30 we got to walk the parking lot. We walked the lot until 11:00. Alright NOW I’M ready to go. “Not so fast you are in the second run group so you need to work the “Course” as a cone chaser”. OK LET’S GO. I stood in the middle of a parking lot in full sun for 2 ½ hours in 95 degree heat. So when I finished my worker session I got to RACE……I belted in my car sunscreen in my eyes and sweat beading up on my sunburned face. I lined up and launched my car I ran up through first gear….wait….I stayed in first gear for the whole lap. OK I still have visions of cones in my head and I think I can go a little faster. 38.6 seconds later I did go faster……Yeeeehaaaa.
So, for sweating my butt off I got 5 – 38 second laps in a parking lot in Detroit. So for my $25 entry fee I got 3.2 minutes of track time. Or it cost me $7.81 a minute for “track” time. I can go to my local track and run a track event for $200 for 4 – 20 minute sessions. So that is $2.50 dollars a minute for track time and I DON’T HAVE TO STAND IN THE SUN. Humm.. so Auto crossing is cheaper?

As I drove home past all the blight in Detroit with my A/C blowing ice cold on my sun burned face I had a chance to reflect on the day……I still think this sport of ours has a place in it for everyone. If you do something and you like it keep doing it. If you don’t then stop. We all got into this to have fun. I’m going to stick to open track events and the muscle car shoot outs and suck it up during the AutoXs.

I get it. I understand AutoXing. It is just not my cup of tea…..


Check out my fancy numbers.

[GregWeld]

Great write up Mark! And you're right -- in this hobby you get to pick and choose, and do exactly what YOU want to do.

I always say to people -- there are two kinds of car guys... Greasers and waxers... I'm a greaser. I like hands on... I don't like to wax or clean. I like to DRIVE to a show - but I don't like to show.

SCCA must be full of a lot of retired NCRS guys... they sound very similar!