Dyno sheets will be posted

#1

We all received a copy of the dyno sheet from each car at Mid Ohio so Carlton and I will scan and post each sheet here. We’ll probably get to it this weekend.

Carter

#2

Carter wrote:

[quote]We all received a copy of the dyno sheet from each car at Mid Ohio so Carlton and I will scan and post each sheet here. We’ll probably get to it this weekend.

Carter[/quote]
Carter,
I have been thinking about your Dyno and the jagged peaks…anyway I talked to someone about it and that signal comes from the inductive pickup on the spark plug wire. That signal is likely jagged due to electrical issues in the car. coil, ground, wires them selves, plug, etc. no real way to tell exactly what but a signal issue none the less

#3

SSSSSSSSHHH! :wink:

#4

it also may simply have been a poor inductive connection

#5

Perhaps we should have a "sticky" Dyno thread (in the Resources section?)…

That way, we’ll have an ongoing archive of Dyno runs, both for racing comparison and for those putting a car together.

#6

Sean:

Thanks for the tips. The plugs were brand new at Mid Ohio and the wires are about two years old. The cap and rotor are about a year old. The coiland other electrical parts are 256,000 miles old.

Also, David Herrington’s plugs were gapped more than what Bentley recommends but David said that BMW recommends the higher gap to help smooth the idle.

And thinking about the dyno sheets it’s important to look at the torque and hp curves as much as the peak numbers. My torque peak isn’t too bad but the curve itself is significantly below that of Chris’ and Carlton’s cars. Mine is certainly not the "car to have."

I’m also planning to replace the airflow meter with a new unit. The flat spot in my engine showed-up coming out of the carosel, the keyhole, and at the back parts of the track. Brain said that replacing the airflow meter eliminated the flat spot in his engine.

I don’t think that it’ll make a huge difference in my lap times but it should help in racing situations.

Carter

#7

with the dyno sheets, it would be good to indicate briefly some info about the engine and differential - e.g. when were they last rebuilt
thanks,
bruce