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Nissan 370Z Touring: Brakes and Blips and Revs, Oh My!
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The part about the revs falling is interesting. I've noticed that if I blip the throttle, the revs fall rather slowly. However, with SRM 'on' I've seen the revs fall very rapidly when upshifting. I don't know how to explain how the car can control its revs like this though...whether it's automatically modulating the clutch or has a way to engine brake and drop revs more quickly on command.
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Hmmm, that's really interesting! Can anyone else comment on this?
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check out this video on how SRM upshifting works. YouTube - synchr revmatch I have been so busy lately, didn't get a chance to do a full SRM video (upshift and downshift). |
Thanks AK. That video shows downshifting mostly, and does not illustrate what you said, that when upshifting it will rev match, then drop to idle if gas pedal not pressed. That last bit of information I didn't know, so thanks for sharing!
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Correct me if I'm wrong, but isn't that BRAKE indicator a signal for the parking brake being engaged? I don't think it has anything to do with low brake fluid. More likely his parking brake linkage is loose and needs adjustment.
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no actually, I have the same issue, im pretty sure its low brake fluid...
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Owner's manual page 2-9:
"Parking brake indicator: When the ignition switch is in the ON position, the light comes on when the parking brake is applied. Low brake fluid warning light: When the ignition switch is in the ON position, the light warns of a low brake fluid level. If the light comes on while the engine is running with the parking brake not applied, stop the vehicle and perform the following: 1. Check the brake fluid level. Add brake fluid as necessary. (See “BRAKE AND CLUTCH FLUID” in the “8. Maintenance and do-ityourself” section.) 2. If the brake fluid level is correct, have the warning system checked by a NISSAN dealer." |
Thank you sir. I should really do something about this...brakes feel fine though...they can hold for a bit longer until I decide what Im doing with them...
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When test driving the 7AT, I notice the revs holding before falling back to idle. I'm not sure if they purposely do that to smooth things in between shifts.
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I think the ECU is programmed to do a blip even when you go to neutral...
The system can't perfectly predict if you are going to upshift or downshift so the engineers designed it to always bleep when you go into neutral. Don't believe me? try it. I think they did this to make downshift bleeps even faster/smoother. It may have actually be done to work around a heavier flywheel...its a pre-bleep to the real downshift bleep, like a jump start. Maybe the flywheel is so heavy that if they didnt use the pre-bleep, then it wouldn't feel as quick. I think the lighter flywheel will make the pre-bleep even more noticeable. However, it will help the system overall... |
The hanging revs/blips could be for emissions purposes. My brother's 09 WRX would sometimes blip (rpms rise when clutch is pressed) and revs hang. Searching online, the explanation we found is that it's for emissions purposes by burning off the extra gas.
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