Important Dyno Data - A Quiz

[Mike Laws]

Hi Mike,

I was under the impression, from the people I have talked to that a moderate percentage of the engine damage (missed shifts aside) comes FROM the pitstops, or caution laps. Can your sources confirm any of that, Mike? I understand this was their first go-round on this type of testing, but can that dyno simulate going up thru the gears, etc?

Neat stuff!

rb

Hi Ryan:

The % of engine damage from missed shifts has decreased pretty dramatically in the past few years due to improved transmission performance and more capable over-rev limiters. It still happens occasionally though.

Also; Excelleration is working on an inertia dyno with clutch/transmission that will be capable of up-shifting and down-shifting.

[Mike Laws]

id love to know what the air turbine numbers were...?
before during and the rate of recovery after lifting at high rpm
and those ..rate of increases from the rpm ranges they studied..?
do the nascars totally lift at all doing a circuit at speed on a normal lap?
cheapst

I was wrong about the use of an air turbine over the carb. The team had no interest in doing this either during the endurance test or subsequent intake manifold testing.

Also; the cars (and trucks) do not lift during qualifying at Daytona & Talladega and rarely lift during the races at each track.