Car Chat

Started by FoMoJo, August 26, 2014, 05:59:31 AM

MX793

Quote from: Soup DeVille on January 16, 2021, 07:47:36 PM
They call it a compensating spring. Apparently it creates a stiffer effective spring rate on the outside wheel when cornering hard.

So similar idea as a sway bar (which the car lacks).
Needs more Jiggawatts

2016 Ford Mustang GTPP / 2011 Toyota Rav4 Base AWD / 2014 Kawasaki Ninja 1000 ABS
1992 Nissan 240SX Fastback / 2004 Mazda Mazda3s / 2011 Ford Mustang V6 Premium / 2007 Suzuki GSF1250SA Bandit / 2006 VW Jetta 2.5

CaminoRacer

Seems like it would keep the inside wheel planted more too?
2020 BMW 330i, 1969 El Camino, 2017 Bolt EV

FoMoJo

Quote from: Soup DeVille on January 16, 2021, 07:47:36 PM
They call it a compensating spring. Apparently it creates a stiffer effective spring rate on the outside wheel when cornering hard.
Would it not have the effect of pushing the other axle/wheel downward thus creating more lean?
"The only reason for time is so that everything doesn't happen at once." ~ Albert Einstein
"As the saying goes, when you mix science and politics, you get politics."

Soup DeVille

Quote from: FoMoJo on January 16, 2021, 08:16:45 PM
Would it not have the effect of pushing the other axle/wheel downward thus creating more lean?

I'm not sure; but the stated reason is that it does the opposite.
Maybe we need to start off small. I mean, they don't let you fuck the glumpers at Glumpees without a level 4 FuckPass, do they?

1975 Honda CB750, 1986 Rebel Rascal (sailing dinghy), 2015 Mini Cooper, 2020 Winnebago 31H (E450), 2021 Toyota 4Runner, 2022 Lincoln Aviator

r0tor

This seems like a logical setup for current offroad capable SUVs that have independent suspension... It's like a swsy bar but probably allows for way more suspension travel over a typical sway bar
2011 Jeep Grand Cherokee No Speed -- 2004 Mazda RX8 6 speed -- 2018 Alfa Romeo Giulia All Speed

FoMoJo

Quote from: Soup DeVille on January 17, 2021, 04:54:06 AM
I'm not sure; but the stated reason is that it does the opposite.
It looks like when one axle goes up, it'll push the other axle down.  Must be something that's not quite visible if it works the other way.
"The only reason for time is so that everything doesn't happen at once." ~ Albert Einstein
"As the saying goes, when you mix science and politics, you get politics."

FoMoJo

Another interesting take on Ford V Ferrari
"The only reason for time is so that everything doesn't happen at once." ~ Albert Einstein
"As the saying goes, when you mix science and politics, you get politics."

FoMoJo

#10987
Makes me wish I was 50 years younger...

https://www.youtube.com/watch?v=hc3JzAgTzNQ
"The only reason for time is so that everything doesn't happen at once." ~ Albert Einstein
"As the saying goes, when you mix science and politics, you get politics."

CaminoRacer

That gets up to 140 real quick. Nice.
2020 BMW 330i, 1969 El Camino, 2017 Bolt EV

FoMoJo

I was a little surprised it still had a gear left when it got up to around 170 mph.
"The only reason for time is so that everything doesn't happen at once." ~ Albert Einstein
"As the saying goes, when you mix science and politics, you get politics."

MX793

Wow, that top gear is tall.  3000 RPM drop from 5th to 6th.
Needs more Jiggawatts

2016 Ford Mustang GTPP / 2011 Toyota Rav4 Base AWD / 2014 Kawasaki Ninja 1000 ABS
1992 Nissan 240SX Fastback / 2004 Mazda Mazda3s / 2011 Ford Mustang V6 Premium / 2007 Suzuki GSF1250SA Bandit / 2006 VW Jetta 2.5

CaminoRacer

Quote from: MX793 on January 18, 2021, 10:28:20 AM
Wow, that top gear is tall.  3000 RPM drop from 5th to 6th.

Drops from 1:1 to 0.63:1. Looks like only the 1 overdrive gear, probably better for road racing to have 4 underdrive gears instead of 3.


First Gear Ratio (:1)
3.25
Second Gear Ratio (:1)
2.23
Third Gear Ratio (:1)
1.61
Fourth Gear Ratio (:1)
1.24
Fifth Gear Ratio (:1)
1.00
Sixth Gear Ratio (:1)
0.63
2020 BMW 330i, 1969 El Camino, 2017 Bolt EV

MX793

Quote from: CaminoRacer on January 18, 2021, 10:50:51 AM
Drops from 1:1 to 0.63:1. Looks like only the 1 overdrive gear, probably better for road racing to have 4 underdrive gears instead of 3.


First Gear Ratio (:1)
3.25
Second Gear Ratio (:1)
2.23
Third Gear Ratio (:1)
1.61
Fourth Gear Ratio (:1)
1.24
Fifth Gear Ratio (:1)
1.00
Sixth Gear Ratio (:1)
0.63


IIRC, 6th is also the only OD gear in my car, and there's a decent jump from 5th, but not that large.
Needs more Jiggawatts

2016 Ford Mustang GTPP / 2011 Toyota Rav4 Base AWD / 2014 Kawasaki Ninja 1000 ABS
1992 Nissan 240SX Fastback / 2004 Mazda Mazda3s / 2011 Ford Mustang V6 Premium / 2007 Suzuki GSF1250SA Bandit / 2006 VW Jetta 2.5

Eye of the Tiger

Storm doesn't have OD. 3rd is 1:1. I can't wait to get it out on the highway.
2008 TUNDRA (Truck Ultra-wideband Never-say-die Daddy Rottweiler Awesome)

AutobahnSHO

My SHO ran up to 90mph dang quick. 90 to 110 took a little bit of work, I got up to 135ish a couple times. Took a lot of open road to get from 120 to 135. :thumbsup:
Will

Eye of the Tiger

Quote from: AutobahnSHO on January 18, 2021, 12:48:46 PM
My SHO ran up to 90mph dang quick. 90 to 110 took a little bit of work, I got up to 135ish a couple times. Took a lot of open road to get from 120 to 135. :thumbsup:

I wonder if Storm even does 90
2008 TUNDRA (Truck Ultra-wideband Never-say-die Daddy Rottweiler Awesome)

CaminoRacer

Quote from: Eye of the Tiger on January 18, 2021, 01:05:48 PM
I wonder if Storm even does 90

Bolt is limited to 93 but I've gotten it to say 94 on the dash. It pulls strongly all the way to top speed.
2020 BMW 330i, 1969 El Camino, 2017 Bolt EV

Laconian

Quote from: CaminoRacer on January 18, 2021, 01:48:24 PM
Bolt is limited to 93 but I've gotten it to say 94 on the dash. It pulls strongly all the way to top speed.

I wonder if the limit is imposed by software. Can you reflash your controller?
Kia EV6 GT-Line / MX-5 RF 6MT

CaminoRacer

Quote from: Laconian on January 18, 2021, 04:41:53 PM
I wonder if the limit is imposed by software. Can you reflash your controller?

I believe that's the max RPM for the electric motor. While motors can rev higher than an ICE, it still has a redline at some point and no transmission to shift into a higher gear. The 7:1 final drive is similar to 2nd or 3rd gear for most cars, so 93 mph ain't a bad redline speed.
2020 BMW 330i, 1969 El Camino, 2017 Bolt EV

Soup DeVille

Quote from: CaminoRacer on January 18, 2021, 05:15:43 PM
I believe that's the max RPM for the electric motor. While motors can rev higher than an ICE, it still has a redline at some point and no transmission to shift into a higher gear. The 7:1 final drive is similar to 2nd or 3rd gear for most cars, so 93 mph ain't a bad redline speed.

On most inverter motors, its a limit imposed by the minimum pulse width of the inverter; kind of the same idea as minimum closed time on injectors.
Maybe we need to start off small. I mean, they don't let you fuck the glumpers at Glumpees without a level 4 FuckPass, do they?

1975 Honda CB750, 1986 Rebel Rascal (sailing dinghy), 2015 Mini Cooper, 2020 Winnebago 31H (E450), 2021 Toyota 4Runner, 2022 Lincoln Aviator

Soup DeVille

Quote from: Laconian on January 18, 2021, 04:41:53 PM
I wonder if the limit is imposed by software. Can you reflash your controller?

Fun fact of the day; most recent (last 10 years or so) low speed transportation electric motors (wheelchairs, forklifts, golf carts and such) use Curtis controllers, or Chinese replicas. The software for setting the motor parameters is free and available on the internet.
Maybe we need to start off small. I mean, they don't let you fuck the glumpers at Glumpees without a level 4 FuckPass, do they?

1975 Honda CB750, 1986 Rebel Rascal (sailing dinghy), 2015 Mini Cooper, 2020 Winnebago 31H (E450), 2021 Toyota 4Runner, 2022 Lincoln Aviator

MX793

Quote from: CaminoRacer on January 18, 2021, 05:15:43 PM
I believe that's the max RPM for the electric motor. While motors can rev higher than an ICE, it still has a redline at some point and no transmission to shift into a higher gear. The 7:1 final drive is similar to 2nd or 3rd gear for most cars, so 93 mph ain't a bad redline speed.

Put some donk wheels on it and you decrease your effective gear ratio.  Much style, more speeds.
Needs more Jiggawatts

2016 Ford Mustang GTPP / 2011 Toyota Rav4 Base AWD / 2014 Kawasaki Ninja 1000 ABS
1992 Nissan 240SX Fastback / 2004 Mazda Mazda3s / 2011 Ford Mustang V6 Premium / 2007 Suzuki GSF1250SA Bandit / 2006 VW Jetta 2.5

AutobahnSHO

Quote from: MX793 on January 18, 2021, 06:28:29 PM
Put some donk wheels on it and you decrease your effective gear ratio.  Much style, more speeds.

Less style though. But more speed!
Will

FoMoJo

Quote from: MX793 on January 18, 2021, 06:28:29 PM
Put some donk wheels on it and you decrease your effective gear ratio.  Much style, more speeds.
Might have to push it to get it going though.
"The only reason for time is so that everything doesn't happen at once." ~ Albert Einstein
"As the saying goes, when you mix science and politics, you get politics."

cawimmer430

Question about Start-Stop.

On my car I turn it off the moment I start the engine. I will only use it once the engine and oil have reached their optimal temperature and only in light traffic. In heavy traffic I prefer to keep the engine running rather than letting it restart and then having it turn off again after 2-3 meters of travel...

Anyway, a handful of times I've forgotten to turn off Start-Stop after a cold engine start. I drive out of my parking garage and at the first red light the engine shuts down.

My questions are:

1) Should this be happening? Engine and oil are cold and have not warmed up in the slightest...

2) Isn't this bad for the engine? I know that these Start-Stop engines have been beefed up for this but I am used to the old-school thinking that cold engine starts equate to more wear and tear, no matter how advanced the engine is.
-2018 Mercedes-Benz A250 AMG Line (W177)



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MX793

The start/stop engine control logic is designed to preserve engine life.

Starting wears the engine in a couple of ways.

First, the big one, wear and tear on the starter.  Start/stop engines have beefed up starters, so non-issue.

Second, true cold starts can wear out top end components.  A true cold start is when the engine has been sitting, off, for hours and has cooled to ambient temperature.  The oil in the top end has mostly run back down to the sump.  Restarting an engine that has been running for a few minutes, even if it's not totally up to operating temperature, is not a true cold start.  It takes seconds for oil to be pumped back up into the top end and it takes some time (many minutes) for it to flow back down again.  You aren't starving the top end of oil or causing wear.

Short trip driving, where the car regularly doesn't run long enough to get up to temperature before you shut it off and let it sit and cool down again (that last bit is an important distinction) can cause problem.  The minute or two you are sitting at a traffic light isn't long enough to be a problem.
Needs more Jiggawatts

2016 Ford Mustang GTPP / 2011 Toyota Rav4 Base AWD / 2014 Kawasaki Ninja 1000 ABS
1992 Nissan 240SX Fastback / 2004 Mazda Mazda3s / 2011 Ford Mustang V6 Premium / 2007 Suzuki GSF1250SA Bandit / 2006 VW Jetta 2.5

FoMoJo

There must be additional wear and tear on various engine components including the starter motor and flywheel; presuming most starter motors still engage the flywheel.  As well, even with momentary shutdowns, the cylinders must lose a bit of oil film and there would be a heating surge as the coolant stops circulating.  Maybe even stuff like the manifold, catalytic converter and various gaskets will be impacted to some degree.
"The only reason for time is so that everything doesn't happen at once." ~ Albert Einstein
"As the saying goes, when you mix science and politics, you get politics."

MX793

Quote from: FoMoJo on January 22, 2021, 09:04:39 AM
There must be additional wear and tear on various engine components including the starter motor and flywheel; presuming most starter motors still engage the flywheel.  As well, even with momentary shutdowns, the cylinders must lose a bit of oil film and there would be a heating surge as the coolant stops circulating.  Maybe even stuff like the manifold, catalytic converter and various gaskets will be impacted to some degree.

In the 1-2 minutes the car will be off waiting for a traffic light, these effects are totally negligible.  There's simply too much thermal mass for the temperature to drop more than a degree or two in that time.

Starter, gears, flywheel, etc all would have been reinforced for the increased duty cycle.
Needs more Jiggawatts

2016 Ford Mustang GTPP / 2011 Toyota Rav4 Base AWD / 2014 Kawasaki Ninja 1000 ABS
1992 Nissan 240SX Fastback / 2004 Mazda Mazda3s / 2011 Ford Mustang V6 Premium / 2007 Suzuki GSF1250SA Bandit / 2006 VW Jetta 2.5

Soup DeVille

I'm pretty sure the starter now stays engaged with the flywheel, and there is a standard clutch arrangement rather than the solenoid/bendix arrangement of older starters.
Maybe we need to start off small. I mean, they don't let you fuck the glumpers at Glumpees without a level 4 FuckPass, do they?

1975 Honda CB750, 1986 Rebel Rascal (sailing dinghy), 2015 Mini Cooper, 2020 Winnebago 31H (E450), 2021 Toyota 4Runner, 2022 Lincoln Aviator

FoMoJo

Quote from: MX793 on January 22, 2021, 09:11:11 AM
In the 1-2 minutes the car will be off waiting for a traffic light, these effects are totally negligible.  There's simply too much thermal mass for the temperature to drop more than a degree or two in that time.

Starter, gears, flywheel, etc all would have been reinforced for the increased duty cycle.
I was more concerned about the temperature rising than dropping.
"The only reason for time is so that everything doesn't happen at once." ~ Albert Einstein
"As the saying goes, when you mix science and politics, you get politics."