Well I went back to the strip yesterday…
Big change was that APR made me a custom race gas tune to try…
Car: 2010 Audi S4 - DSG with sports dif, 5,500 miles, 1/8 tank of gas, tools and spare removed
Mods: APR beta race gas tune, APR pulley, LFC’s, miltek non-res exhaust, custom intake, APR CPS, front and rear sways, BBS CHR’s
Conditions: 40-48F, 50-70% humidity, 30.4 BP… DA was 0-300… Great DA but too cold of a track
Got a total of 4 runs in for the day… Unfortunately, I didn’t beat the 11.88 that was posted on AZ but I did run another 11 second pass on my second run…
Run 1: I debated on tire pressure with the weather and ended up going 40f 34r… big mistake! DA was about 0 as I mentioned above, it was cold and the track was very cold… They had it prepped well but it didn’t matter… They let street cars go first which they probably should have had the slick cars go… anyway, car spun like crazy, got squirrelly and only cut a 1.78 60ft… see vid and slip…
http://www.youtube.com/watch?v=ANMg8098NOs
http://i1012.photobucket.com/albums/af247/concordslim/IMG00202-20111105-1550.jpg
Run 2:
I dropped the tire pressure 36f 30r with the DA still near 0 and the track being cold… Spun a little bit but not as bad as the first run… Ran my best ET of 11.99
http://www.youtube.com/watch?v=izfXrz_cF1s
http://i1012.photobucket.com/albums/af247/concordslim/IMG00203-20111105-1551.jpg
Run 3: I dropped the pressure to 34f 28r with the DA rising and the track temp rising… Got a good launch, unfortunately the 60ft light was frosted over so not sure of the 60ft time… ran a 12.02…
http://www.youtube.com/watch?v=EvorCcLBxHU
http://i1012.photobucket.com/albums/af247/concordslim/IMG00204-20111105-1551.jpg
Run 4: Since I didn’t spin I kept the pressure the same and was rewarded with my best ever 1.64 60ft time… unfortunately, my 1-2 hung up and this cost me 2+tenths… Ran a 12.12 as a result…
http://www.youtube.com/watch?v=oZZiFvhV-oY
http://i1012.photobucket.com/albums/af247/concordslim/IMG00205-20111105-1551.jpg
So needless to say I was a little bummed… As I mentioned I was testing a new tune and thought I would post a better time… I think I needed to let it adapt longer but not sure… I have emailed the logs to APR and will see if they want to tweak the tune again this week or just have me try again next weekend… It got better as the day went and I am sure if the shift didn’t take a dump on the last run I would have went 11.8x, but I didn’t and that’s all that matters… Wanted to make a few more passes but my brother had to work and it was a good 2 hour wait as there was 250+ cars… So will see how we do going forward… 100% gutting these cats or getting headers for next spring! I am still trapping lower than I did last year! I know if I had headers I would be running much much better… Disappointed I didn’t run better but I dumped alot of boost and I think there is more left in the car as it sits… I’ll have some external vids later if I can figure this POS camera out… LOL
The logs really tell a story:
Run 1 average timing was 23 degrees with average boost of 12.2 PSI but I was bypassing an average of 14% of the boost! IAT’s were on average 33.7c so very very good…
Run 2 average timing was down slightly to 22.5 degrees on average but boost was 13.26 PSI and I was only dumping about 8%… IAT’s were still good at an average of 40.8c
Run 3 average timing was down again to 21.3 degrees on average and boost was 14.0 PSI and I only dumped 5%… IAT’s were up to 48.4c so still pretty good…
Run 4 average timing was down to right about 20 degrees on average but boost was up to 14.3PSI on average and IAT’s were at 53.7c
I saw as much as 16psi which is the highest I have seen but I was dumping boost almost all the time and not sure why… More than willing to share the logs if anyone wants to review them…
Discuss my slow times! LOL