10mph drop doing a left hand turn?

jtvang125

Diamond Member
Nov 10, 2004
5,399
51
91
I entered the turn going 40mph and let off the accelerator completely. At the exact moment I straighten out I'm at 30.

Could it be the DSC/DTC kicking in or can that turn really bleed off that much speed?
 

jagec

Lifer
Apr 30, 2004
24,442
6
81
Yes, you can scrub off a lot of speed in a turn, particularly a tight turn. Furthermore, you're engine braking the whole time if you're off the gas, so that will cause an even greater drop.
 

JCH13

Diamond Member
Sep 14, 2010
4,981
66
91
You're scrubbing your tires by turning and not adding any power back... I'd definitely believe a speed drop like that over a longer turn, especially with some engine braking in there.
 

satyajitmenon

Golden Member
Apr 3, 2008
1,911
9
81
For a moment, I thought you were talking about dropping your motorcycle while doing a 10 mph turn.
 

Throckmorton

Lifer
Aug 23, 2007
16,829
3
0
That's what happens when you steer a car. You transferred that 10mph worth of momentum into the earth, slightly changing its rotation
 
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jtvang125

Diamond Member
Nov 10, 2004
5,399
51
91
Physics, how does it work?

Yes, I get it that taking a turn is going to bleed off some speed, just didn't think it would be that significant. Therefore I was wondering if the nanny system in my car is kicking in to drop the speed even lower to make the turn a little safer.
 

thomsbrain

Lifer
Dec 4, 2001
18,148
1
0
Whoa, something is seriously wrong with your car. Since 1996 when cars when to the OBDII standard, the federal government has required all cars to gain 10 MPH in left turns, and 8.8 MPH in right turns, for safety and emissions standards. I recommend you stop driving immediately to prevent further damage.
 

TakeNoPrisoners

Platinum Member
Jun 3, 2011
2,599
1
81
Whoa, something is seriously wrong with your car. Since 1996 when cars when to the OBDII standard, the federal government has required all cars to gain 10 MPH in left turns, and 8.8 MPH in right turns, for safety and emissions standards. I recommend you stop driving immediately to prevent further damage.

That or he could be low on blinker fluid.
 

slugg

Diamond Member
Feb 17, 2002
4,723
80
91
Whoa, something is seriously wrong with your car. Since 1996 when cars when to the OBDII standard, the federal government has required all cars to gain 10 MPH in left turns, and 8.8 MPH in right turns, for safety and emissions standards. I recommend you stop driving immediately to prevent further damage.
This.
 

Railgun

Golden Member
Mar 27, 2010
1,289
2
81
No one mentioned letting off completely is a bad idea? You unload the rear and it`s a good way to throw the arse end out. :)
 

Zap

Elite Member
Oct 13, 1999
22,377
7
81
science-stand-back.bmp
 

SSSnail

Lifer
Nov 29, 2006
17,458
83
86
My car gains at least 15 mph in the bends. I've mastered the triangulate apex compression technique, where before entering the turn, I activate the trans-horizontal planar force stored in the tires to maximize the centrifugal slipstream propulsion effects.