Mark,

My favorite part of the day Saturday was when I was watching you make a pass on the Autocross. When you finished your run and idled by, a nice gentleman next to me nudged me and said "That's my son". I said "You are Mark's Dad? You must be very proud. He's an engineer's engineer and one heck of a nice guy who doesn't let all of his success go to his head."

As a proud father myself, I could see how proud he was in his eyes and maybe even a little emotional crackle in his voice.

That was a very cool moment.

Lou

Very cool Lou :thumbsup:

Don is an absolute gentleman and it was a true honor to meet and converse with with him during the week.

Where is the like button.

Lou thanks for sharing this and Mark this has to be the best car to date and I a happy I was able to see it at Sema.

Living up to the name........

http://photos.smugmug.com/photos/i-z...-zTHbZ9z-L.jpg

Could Mikels or Mark explain why the car has so much un-burnt fuel coming out the exhaust and creating this "hellfire"

I'm not completely familiar with LS engines yet and what and how the computer regulates things, but I'm trying to pick things up.

Generally with an old school carb on a race engine, when you are shooting flames out of the exhaust that's not exactly a good thing. Obviously it's loading up and the carb is running rich, so depending on air temperature etc.. You would change jets in the carb.

I'm just interested to know what's going on here. I looks badass I know that much. I laughed like crazy when I saw a photo of hellfire really flamed up and people were commenting thinking Mark blew it up. Now that was funny.

I'm sure it only happens on decelaration !

question came up before....
 

Its common on RPM-MAP based ecus in race applications for the lowest MAP bins to be set at the max vacuum that you can pull while opening the throttle quickly. When you quickly close the throttle quickly at high-load, high-rpm, you can often get the MAP to dip below that value and it will cause a rich condition that produces popping and flames. You can tune it out by spreading out your MAP bins, but it will lower the resolution of your fuel tables in the normal operating range and hence isn't usually done in race applications.

Mark, I am curious if you think you may revisit this thought for 2015 and/or beyond. :)

2014 OUSCI Road Course
 

Here's a video from the final road course session (about 1/3 into it).

It gets really wild about two minutes in :D.

Some really sweet driving by all and a great perspective on how hard these guys track their cars.

OH MY GOOD GRACIOUS! My office chair was all over the place watching that. I was on the binders way before Mark. And that's just watching the video! LOL Thanks for posting that video, it made my afternoon! :king: