Friday the 26th was a mix of triumphs and setbacks. While we made a lot of headway with the project, a few problems arose that required some sacrifices to be made.

We finalized the intake plumbing and dry sump setup after the shop closed today, and buttoned up the car for some late-night dyno tuning.

Once on the dyno, we got a few good baseline pulls in before something went wrong. Power between two pulls completely fell on its face, and shortly thereafter, we began to hear some valvetrain noise.

After some troubleshooting, we found that the cam sprocket on one of our Cat Cams 3658 camshafts decided that it no longer wanted to be attached to the cam.

We scoured the shop for some AEB camshafts and a non-VVT cam tensioner, swapped over the parts, and performed compression and leakdown tests. Luckily, everything checked out, we escaped without bent or broken valves, and we could get back to tuning.

At around 2:00 AM on Saturday morning, we had a conservative 23 PSI low-boost tune, and loaded up the trailer to head down to Buttonwillow.

Overall, we made a great deal of progress on the Time Attack A4, and got it together in time to head down to Buttonwillow Raceway for the first race of the 2010 Redline Time Attack Series.

The car will continue to evolve and be improved upon throughout the series, so the build updates will keep on coming.

Updates from the race weekend coming soon!

This entry was posted on Saturday, March 27th, 2010 at 4:14 AM and is filed under Racing, Tuning. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.