Nationals Dyno Thread

#1

Scott, so, what did you learn/observe that we can pass along to other directors (or co-director, in my case) and racers that will keep this a true SPEC (emphasis of caps is on purpose) e30 race series? Good discussions with Simon, Andrew and Carter?

Can you share the straightaway talent, also known as horsepower numbers from the dyno, data with us? I’m thinking that the data will let some of us know (specifically me) that we need to work on driving skills before crying about the horsepower that a competitor may or may not have. Thus far the trackmate data thing is not working too well in the Southeast Region.

Regards, Robert Patton

#2

We voted on this and it was agreed that all dyno sheets would be shared. I think Scott will eventually post the sheets to this site. Off the top of my head this is what I remember but don’t hold me to these numbers.

hp/trq
Robert Grace 151/153
Simon Hunter 156/150
Brandon Hey 151/158
Michael Osborne 152/159

thats all I remember but there was nothing out of the ordinary.

Other things that were checked from what I observed
Front camber (I would say I would get your camber set to 3.3 and not push the limit here, I had mine set to 3.4 and it took multiple measurements to get it to measure right)
Track Width
Fuel samples were taken
Weight
Rear Shocks were removed and sent to AST to dyno
Multple dyno runs were done

#3

My car came in at 150/150 on the same dyno on Wed.

#4

As Spec3 begins to gain some speed here in the M-A, these types of issues will become important.

As the leaders of the series from nationals are participating in this discussion (which is great), I am wondering if any consideration was given to the very unique characteristics of the curves for Osbourne. All of the graphs are presented with level 5 smoothing, yet that motor has the smoothest curve I have ever seen in my life on any type of race car regardless of level of tuning, in addition to some very strong numbers. I am not sure if it is a product of immense balancing in the motor and driveline or anything else, but it really surprised me.

I recognize that these sorts of issues are extremely difficult and I hope that our series can learn from your (and others’) best practices.
Jon

#5

I agree with Steve, that the Nationals should be taken seriously and penalties should be stiff; however sending someone home is pretty drastic for their first offense. If there’s a 2nd offense, send the person home.

Similar to the CCR for rule 23.1.2 Unsportsmanlike Conduct:

#6

If they’re going to make us run 93 octane anyway, why don’t we all get chips and eliminate an easy cheat?

#7

Tires, pressure, and position of the tires on the roller all affect dyno results. And I suspect that how the car is strapped down also affects results. If I were looking at dyno data comparisons I’d be more interested in the shape of the torque curve and the area under the curve than in peak numbers. I’ve not seen the dyno results from Nationals and I wasn’t there so I don’t know how the cars were handled or how the tests were run.

#8

can’t I at least get an argument? This forum has been dead for a week. How about that megasquirt idea?

#9

the overall philosophy is only to make rule changes to fix “issues”. Something that costs money and just results in a performance increase for everybody (at least those who pay the money to do it) will not be considered highly. I think Megasquirt is way cool, but opportunities for “customization” abound with it. Maybe when we get to a point where the availability of stock ECU’s in good shape declines we could consider this. Could have a spec megasquirt ECU and use random ECU swapping for monitoring.
thanks,
bruce

#10

chipped ECU = broken rocker arm