Jason, I’m with you on the very short warm-up boat. Cold oil is thick, and some engines/oil pumps need a few seconds to get that oil pumped through all of the passages. Your 30 seconds or so should be sufficient waiting before driving away, and taking it easy on the car until it’s warmed up is a good idea no matter…

There’s the inertial loads off spinning the crank, but there’s also reaction loads from torque when the crank propels the car forward. To me, the biggest issue is the cold oil that doesn’t flow very well, but I’m in the same camp as Jason, 30 seconds to a minute of idling, then go drive, and take it easy until…

No prob! Sorry for all the edits lol. That’s the final version now.

Yeah, it’s pretty interesting physics. Believe it or not, it’s pretty analogous to rockets/missiles. There’s a reason the fins are on the back - drag. You can approximate a hypothetical point of application for the drag force (“center of pressure”) on a rocket. The bigger and further back the fins, the further back…

Atmospheric correction factor printed on the dyno sheets are 5%~10% as far as I can tell... seems a little high, reference conditions are 77F, 29inhg, 50% humidity, all the test conditions shown on those sheets are pretty darn close to that.

Yeah, it’s the inconsistency in smoothness from the other plots that gets me... Not saying they’re doing anything on purpose, but generally shop dynos are tough places for cars, especially FI, to post great numbers.

Three cars from two companies all significantly overperform on their dyno? They may have a correction factor off by a bit... and that Z06 printout is ridiculously smooth, something funny may be going on.

Pikes Peak seemed to accept him with open arms, he was filming there recently with the Hoonicorn Mustang: http://mikeyantonakakis.kinja.com/ken-block-is-f…

The best part of this is that his building became 4th tallest, not tallest, when the towers fell. Not only is his statement atrocious, it’s atrociously false: https://en.wikipedia.org/wiki/List_of_t…

He was also filming on Pikes Peak recently... http://mikeyantonakakis.kinja.com/ken-block-is-f…

Used to be a transmission engineer. The latest round of torque converter-automatic transmissions pretty much all operate like dual-clutches (at least when changing a single gearstep), via clutch-to-clutch shifting. Essentially, you disengage one clutch and engage another to shift (same as a dual-clutch). Gear ratios…

This, this here is the answer it seems.

CVTs lose their efficiency if you make them strong enough to handle torquier engines...

Came here to say that structural steel members are not very straight, square, or untwisted - definitely can’t rely on them as gauges.

Yup, people still died on the 50cc machines. They’d hit 100+mph in spots, and those motors were running on the ragged edge and would thus seize pretty often. I highly recommend the book “Stealing Speed,” it’s about (mainly) the 50cc class in the 60s, and how Suzuki helped an East German guy defect and bring his team’s…

I think my point still stands though, they’re still getting a lot of downforce even with the rear wing removed.

Multiplying 4 numbers together is “lots of math?” And they only took off the rear wing, they still used the front wing and undertray/diffusor.

Depends heavily on tire compound and construction. For reference, top fuel dragsters pull something like 8G at the start... FSAE teams got together and had tires tested, that’s where I was getting the 1.8 data, it’s longitudinal. Lateral coefficient was more like 1.5. Heat has a big impact as well as surface…

Nice points!