FOX Sports Exclusive
Mac Track: Flat Martinsville tests COT, brakes
Who to Watch
What to Watch
|Speed Mail Larry McReynolds|
NASCAR Performance (SPEED, Sun. 8 a.m. ET)James from Winter Park, Fla.: When does NASCAR mandate the change over for all GM teams to the R07 since it was approved as the GM engine for 2007. How long is the grace period until there will be only one GM engine? Larry McReynolds: That's a good question, and I asked the GM people at Talladega. Right now, you can still run both in 2008, and I don't know if there is a set period. NASCAR and GM will allow teams to continue to run the SB2 because it would be very stressful for teams like Morgan-McClure Motorsports to switch over 100 percent to the R07. On NASCAR Performance at Martinsville, we're going to have Jim Covey, NASCAR engine development manager for GM Racing, and he will demonstrate the difference between the SB2 and the R07. I certainly anticipate asking him your question again.
FOX race analyst Larry McReynolds has more than 25 years of NASCAR experience as a mechanic, crew chief and broadcaster. He and his fellow Crew Chief Club members take you behind the wall at www.crewchiefclub.com.
"How to Become a Winning Crew Chief" is on bookstore shelves, or you may order your own autographed copy from www.DWStore.com.