"5 tips for shaving ET this weekend - Part 1"
By Don Terrill
taken from http://racingsecret.com
1.) More RPM - I've found that it's just about
impossible to have too much (higher number) gear in
your car if your goal is the lowest ETs. Just keep
adding gear ratio until you stop gaining ET, even if
the MPH falls off. Remember: racing is usually ET not
MPH.
2.) Jetting - If I had to guess I'd say that 80% of all
race engines are jetted too rich. Some of the signs of
a rich setting are an engine that misses or surges. Try
jetting down two sizes and see what happens. Learning
how to read spark plugs is my best advice.
3.) Ignition Timing - Go up or down two degrees and
make a test. I've seen engines tuned with just a couple
of degrees too much timing lose 30hp, so don't think
you can't have too much.
4.) Oil - If you aren't using synthetic oil already,
try it, it's worked every time for me. The other big
thing is oil level, on a wet sump engine too much oil
is a killer. No engine needs more than 6gts, no matter
what the pan manufacture says. In fact; too much oil is
bad.
5.) Shift Points - If you're going to miss your shift
point, miss it early. A late shift is an ET killer,
especially in the lower gears. Here's a test: If you
seem to really be knocked back into the seat after the
shift, you're late. The Reason? Your body went forward
before the shift because of lack of acceleration.
For info on how to read spark plugs:
http://racingsecrets.com/spark_plug_reading.shtml
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