[KeithO]

I learned that one of my competitors in CMC in my region works for Hot Rod and has been doing a bunch of articles on his build-up to a CMC car. I got the April issue today at the store, but this was apparently the 3rd installment of more to come. I'll get the subsequent issues, but I was wondering if anyone has installments one and two?

[Jon A]

Despite the issue of it being "wrong" or not, one of the practical concernes some people are having is totally invalid.

The concern that the lighter reciprocating mass will give him more power on the track but not "show up" on the dyno would be valid if the series used an engine dyno, waterbrake dyno, Mustang dyno or other eddy-current dyno or any other sort of dyno that holds the engine at a constant RPM while measuring torque.

However, this is NOT! a valid concern on a Dynojet. From the pistons all the way to the rubber in your tires where they meet the roller, if you have less mass that consumes less power to accelerate giving you a HP advantage on the track, it will show up as an increase in power on a Dynojet. Lighter pistons? Lighter flywheel? Lighter wheels/tires? They will all show a power increase on a Dynojet. That's one of the best things about them--they measure power the same way the engine will be used on the track--by making it accelerate a mass.