Hitting the Rev Limiter - Is it bad?
#1
Lexus Test Driver
Thread Starter
Hitting the Rev Limiter - Is it bad?
I did a few blips and let it bounce off the limiter in Neutral this morning and it did sound really good and addicting.
That's what the limiter is for right? To keep ur engine from over revving.
That's what the limiter is for right? To keep ur engine from over revving.
#2
Lexus Test Driver
That's why it's there - to prevent engine damage. However, in my opinion I would prefer to hit the rev limiter under load (e.g. in-gear) instead of with the engine under no-load (e.g. free-wheeling) in neutral...because in neutral the engine will have a greater chance of exceeding the maximum RPM threshold whereas in-gear, under load, the RPM increases slower. That said, enjoy the addicting sound!
#3
Lexus Test Driver
Thread Starter
But u can't hit the rev limiter when in gear, it'll just upshift at redline.
#4
Lexus Test Driver
Edit: I think the GS 350 engine has a redline of 6,600 RPM with the rev limiter set at the 6,600 RPM redline for fuel cutoff. The GS 350 transmission upshifts at 6,400 RPM - or 200 RPM below redline.
Edit (for example): The Lexus LFA engine has a redline of 9,000 RPM with the Rev Limiter set at 9,500 RPM for fuel cutoff - or 500 RPMs higher than engine redline.
Last edited by bclexus; 02-18-15 at 01:32 PM.
#5
exclusive matchup
iTrader: (4)
if i put the car in manual mode and set it to say m2 and then proceed to rev it (gun it), the car should go into 2nd gear and then bounce on redline.
that's how all previous lexus work. if it goes into m3 for you, that would be an extremely stupid design
#6
Lexus Test Driver
huh? that would be odd
if i put the car in manual mode and set it to say m2 and then proceed to rev it (gun it), the car should go into 2nd gear and then bounce on redline.
that's how all previous lexus work. if it goes into m3 for you, that would be an extremely stupid design
if i put the car in manual mode and set it to say m2 and then proceed to rev it (gun it), the car should go into 2nd gear and then bounce on redline.
that's how all previous lexus work. if it goes into m3 for you, that would be an extremely stupid design
– A “–” shift when vehicle speed decreases.
– When the temperature of automatic transmission fluid and engine coolant drops, shifting is conducted based on a
low oil temperature shifting pattern.
– When the automatic transmission fluid temperature is high, automatic shifting is performed.
– When the engine speed reaches the redline, gear shifting is conducted automatically.
Reference (See Page 71)
#7
Lexus Test Driver
Many car makers limit the engine RPM when the automatic transmission is in neutral/park to a much lower RPM compared to when the engine is in-gear, under load. I suspect the reason for this is two-fold - (1) so people don't drop the transmission into gear at too-high of an RPM, and (2) so people don't overshoot the engine's redline, which is more likely under a no-load condition.
L99 Chevy
Smart Car
Mopar 5.7 Hemi
Same with some Hondas, and many German cars...
L99 Chevy
Smart Car
Mopar 5.7 Hemi
Same with some Hondas, and many German cars...
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#8
Lexus Test Driver
Thread Starter
#9
exclusive matchup
iTrader: (4)
Automatic shifting is conducted in the following cases, even when in M mode:
– A “–” shift when vehicle speed decreases.
– When the temperature of automatic transmission fluid and engine coolant drops, shifting is conducted based on a
low oil temperature shifting pattern.
– When the automatic transmission fluid temperature is high, automatic shifting is performed.
– When the engine speed reaches the redline, gear shifting is conducted automatically.
Reference (See Page 71)
– A “–” shift when vehicle speed decreases.
– When the temperature of automatic transmission fluid and engine coolant drops, shifting is conducted based on a
low oil temperature shifting pattern.
– When the automatic transmission fluid temperature is high, automatic shifting is performed.
– When the engine speed reaches the redline, gear shifting is conducted automatically.
Reference (See Page 71)
#10
Lexus Test Driver
Thread Starter
U know I noticed that my car shifts funny when cold. When I'm in M mode and try to shift manually, sometimes it doesn't shift! But when all is warm it shifts on demand. lol
#11
Exactly! I don't understand why it's called "manual mode" if the Electronic Control Transmission (ECT)'s ECU is automatically up shifting for you.
I actually brought this up about a year back when I was looking into the IS350 F-Sport (which btw, does the same thing).
Here is an entire thread where we discussed it: https://www.clublexus.com/forums/is-...nual-mode.html
I was back & forth with several people until they FINALLY understood where it would be useful (especially for the IS350 F-Sport, which is more commonly tracked) and how stupid it is.
A good read if you're interested,
~ Im2bz2p345
P.S. - Here is also a more technical piece on the ECT in Toyota vehicles: www.autoshop101.com/forms/h16.pdf
I actually brought this up about a year back when I was looking into the IS350 F-Sport (which btw, does the same thing).
Here is an entire thread where we discussed it: https://www.clublexus.com/forums/is-...nual-mode.html
I was back & forth with several people until they FINALLY understood where it would be useful (especially for the IS350 F-Sport, which is more commonly tracked) and how stupid it is.
A good read if you're interested,
~ Im2bz2p345
P.S. - Here is also a more technical piece on the ECT in Toyota vehicles: www.autoshop101.com/forms/h16.pdf
Last edited by Im2bz2p345; 02-19-15 at 08:17 AM.
#13
Car won't go into 6th gear when cold is what I noticed. That and when not in ECO mode, the car revs higher and tends to lunge forward hard when you take your foot off the gas.
#14
Lexus Test Driver
Last edited by bclexus; 02-19-15 at 09:16 AM.