Drag Race Results 7-27-2013

This was the first VW Bug-In that Spokane has hosted.  With the mild tune on the car I was pleased with its performance.  As soon as I am able to get a couple of more upgrades on the car and a more aggressive tune, I expect the performance to be stellar.

The changes that I made on the engine reduces the power until I spray more nitrous as I have lowered the compression from 13 to 1 down to 8 to 1 and have increased the exhaust valve size.  Considering that I am using the same size nitrous jets as last year, it didn't loose as much as I expected.  I look forward to increasing the amount of nitrous in the future.

Disclaimer!... The reasons that I did not put an aggressive tune on the car was that I want to wait until I get the WON nitrous system on the car, we need to make a few upgrades on the dyno as it is having a few issues due to a connectivity issue on one of the computer boards and also I haven't made all of the suspension and safety upgrades that I want to yet, plus I had just barely gotten the engine back together and this was the first time out with the changes.

I had the launch set to 5,000 rpms every run and the tire pressure set to 15psi.  I set up the nitrous to activate from 4,500rpms to 7,150rpms running .024" nitrous jets to the first stage for first thru third gears and and then fourth gear to switch to the second stage with .028" nitrous jets.  Also during the event, I kept the nitrous bottle pressure at around 900 to 925psi.  Other than monitoring the bottle pressure and tire pressure, the only thing that I did to the car in between runs was to charge the battery, run the fans for a bit to cool down the engine and confirm that there were no leaks anywhere.  Although I did data log the runs, I didn't even look at them during the event.

The engine ran very well and consistent, considering the current tune, plus it did not leak a single drop of oil!  The only issue that the car had was that it was very hard to get into first gear after the second time trial and would not go back in after the elimination run.  The transaxle only has 15 quarter mile runs on it, however has possibly 100 dyno pulls, so it is over due to be looked at and have the hub and sliders upgraded.

First Pass - Time trial run...

     It ran 10.439 @ 129.81mph with the 1/8 mile times being 6.630 @ 102.99mph.  Sixty foot time was 1.448.  Reaction time was -.009 and the run was at 11:53am.

Second Pass - Time trial run...

      It ran 10.430 @ 130.20mph with the 1/8 mile times being 6.644 @ 103.11mph.  Sixty foot time was 1.471.  Reaction time was .033 and the run was at 1:22pm.

Third Pass - Elimination run (Heads up no dial in)...

      It ran 10.482 @ 130.32mph with the 1/8 mile times being 6.699 @ 103.11mph.  Sixty foot time was 1.451.  Reaction time was .097 and the run was at 3:21pm.  (My competitor had a reaction time of .513 and ran a 9.85 @ 140 with his turbo bug to take the win with a victory margin of .216 seconds.)

 

Here is the data from the two time trial runs and the one elimination run...

Date 60 ft.  1/8 MPH  1/4 MPH
7/27/2013 1.448 6.630 102.99 10.439 129.81
  1.471 6.644 103.11 10.430 130.20
  1.451 6.699 103.11 10.482 130.32

Here is a video that a former student of mine took and posted up on YouTube (Thanks Wes!) (In the run, I am competing in a heads up eliminations run against a 9 second turbo bug.  I get a better starting time reaction, but he is able to catch me on the top end.)...

     http://www.youtube.com/watch?v=0Nqd2uwoJmI&feature=youtu.be

Here is another video of the race above that I stumbled upon from the same event...

     http://www.youtube.com/watch?v=rRJrwYRlp_o

Here is a video of a time trial that I stumbled upon from the same event...

     http://www.youtube.com/watch?v=u7M5P49mWVI