Slow Down To Go Fast
I read an article in your magazine several years ago that claimed the future of short track racing would involve decelerating in the straightaway and accelerating through the turns.
I do not know how long ago it was written or who wrote it. I know CT has published many articles since then but I would very much like to discuss this matter with the author of that article.
You can call me. I think you are referring to a racing school I attended and wrote an article about where it is taught to lift earlier and brake later into the turns and that enables you to get into the throttle earlier. This method, developed by Mike Loescher with Finishline Racing School, has produced a lot of wins and championships over the years.
It takes a lot of patience and trust because driving deep into the corner and braking heavy and late feels fast. But the stop watch will show that the method I spoke of will work much better in most cases, especially in qualifying.
You're not really slowing down early, you are ending the acceleration early, which is not that great and beneficial at the end of the straightaway anyhow. You're maintaining speed later by coasting and braking softer to make the car faster from turn entry to mid-turn. Most turns are a parabolic shape and you don't need to slow to mid-turn speed too soon.
Cam for a Hobby Stock Dirt Car
I'm currently racing in a hobby stock division at a southern Oklahoma dirt track. Being an "economical/beginner class" the rules require that we run large chambered heads, stock exhaust manifolds, stock intake manifolds, and more. Where the rules don't specify any limitations is camshaft specs. However I know that with limited breathing capabilities an oversize cam is not going to do me any good.
I'm running a set of xxx993 heads I believe with 1.95/1.50 valves and a quadra-jet carb that a friend built that flows right around 700-cfm on a standard stroke 350 small-block Chevy. I'm trying to match a hyd. camshaft with this combination that will give me plenty of torque coming off of the turns but still allow the engine to turn 6,500 rpms or more if needed.
I know that velocity of air flow can somewhat make up for the lack of mass in airflow. However I'm not sure what the right cam specs would be. Any thoughts on the situation would be greatly appreciated.
I will tell you what the engine experts will tell you. Every major cam manufacturer has tech people on staff who specialize in helping you choose the correct cam for your application. They get paid to do this and they like what they do.
Call up the cam company of your choice and tell them what you told me. I'm sure you will get the information and help you need. Anytime you have an engine specific question like this, go directly to the experts who know and work with your engines and their design. They'll get you going in the right direction.