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On its face, 3.25 versus 3.23 is less than half a percent difference, so based on diff alone those two should be ignorable.
HOWEVER.. MATH
When you did your motor swap, you also swapped the transmission. The gearing on the E36 transmission is very different from the E30’s transmission. So to be accurate for comparisons, you’d need to take both into consideration.
E30 325is with diff = 3.73
(assuming Getrag 260/5 transmission)
First = 3.35 (*3.73 = 12.50)
Second = 2.03 (*3.73 = 7.57)
Third = 1.36 (*3.73 = 5.07)E36 M3 with diff = 3.23
(assuming ZF 5 speed transmission)
First = 4.20 (*3.23 = 13.57) ==> 8.6% increase
Second = 2.49 (*3.23 = 8.04) ==> 6.2% increase
Third = 1.66 (*3.23 = 5.36) ==> 5.7% increaseSo you are getting way more bang for your buck with the 3.23 diff and your shorter gearing on the E36 transmission than you had for the E30 one with the shorter diff.
So only looking at the diff ratio in isolation you get a completely bogus view of what is happening from the flywheel back.
Whenever there is a driveline change like this to put a bigger motor in a lighter car (and associated gearing stuff), I have to wonder whether it makes more sense to treat the car as the chassis it started as with a power and gearing upgrade, or to take the bigger car as the baseline and then add points to it for the “effective” weight reduction. Neither one seems like an accurate model.
We would be well served by looking at actual run histories for cars with certain characteristics and determine the real-world equivalency for things. Our current points model is fairly arbitrary (I know Hal would strongly agree).
Round 6? We’re still waiting on Round 5!
I’d expect that we should expect some delay on R6 since we have a completely new system now and need to figure out the ins and outs of finalizing the results
Personally I would not have a wheel welded. There are many variables you won’t have control over (quality of the weld, atmosphere the weld was done in–could affect the alloy of the weld, heat treatment or lack thereof of the wheel afterward could affect strength, etc).
You may be able to find a used replacement wheel for about the same money so that could be an option to consider too.
so with the extended season are we going to re-instate the “drop 1 event” thing for the class standings?
Ok.. here are my times
#18, RG1, AAA
49.341
50.345
48.862
47.905
45.241
45.094Dave Sparks was gridded right after me but I think he ended up out of order a couple times because he was reworking the cone stations
-Rob
No Drones!
Marina is an active airport. And we are already on very thin rope with the FAA for permission to use the site.
Flying any remote controlled aircraft within 5 miles of any airport is illegal unless you get explicit prior permission from the airport. Flying them *at* an airport will definitely get you noticed very quickly, and frankly we don’t want to be noticed by the ATC.
Jeff – First off, thanks for the hard work getting this all lined up. I just got wind of the signup being open from Paul and saw your post here… Are you going to send an email letting people know that the signup is open (I doubt that a majority of our participants watch this forum)
If we get the additional dates, are we going to revert back to the standard class-based standings? Or is the TDS calc going to be done in parallel with the normal class standings from the beginning?
And for 2015 are there any changes to the classification model other than new vehicles? This might affect people’s prep work in the next few weeks.
-Rob
It looks like you might want to have the starter/flagger stand off to the right edge (closer to the fence) to keep them farther away from the outside of the turn leading to the slalom.
It looks like the new folks did a great job with pulling their times down over the course of their runs. Congrats!
No surprise: AAA is going to be pretty competitive this year. The top 4 times (excluding Praneil) were separated by only a 10th each.
My best run was my first official run. I was just completely unable to get faster than that after. I’m definitely not familiar yet with the handling of the updated suspension on my car.
Can’t wait for next month!
I didn’t record any videos of my runs… sorry
I was only able to really nail that uphill turn before the slalom once. I started just a little wider on the entry and turned in earlier so I hugged the inside as it went uphill. The off camber angle pushed me just wide enough to the right to make the entry into the slalom the perfect approach. It was basically the only place on that turn without a huge pile of pebbles on it too, which helped keep the car settled when accelerating to the slalom.
Credit goes to Michael Kolesar for sharing that one–I think that one change dropped a second off my time.