RPM Blip on Upshift?

Pharmacist · 03-03-2010, 07:22 AM

happens to me all the time. easiest way to see it is start from a stop, rev a little and slip the clutch for a couple of seconds, then lift off throttle and simultaneously push the clutch back in. you should notice a slight rpm increase for a moment. like others said, it's probably due to a mix of a heavy flywheel and also a slight lag time in the response of the electronic throttle

TheSnakeJake · 03-03-2010, 06:59 PM

i was out driving my car today (just got it last night) and it definitely blipped the throttle between my 3-4 shifts. it happened a few times, but only during the 3-4 shift. this wasn't the throttle "lag" that you guys keep mentioning (i noticed that as well), this was an obvious blip of the throttle...

anybody else experience this?

kfscoll · 04-04-2010, 03:00 AM

Quote:

Originally Posted by TheSnakeJake

i was out driving my car today (just got it last night) and it definitely blipped the throttle between my 3-4 shifts. it happened a few times, but only during the 3-4 shift. this wasn't the throttle "lag" that you guys keep mentioning (i noticed that as well), this was an obvious blip of the throttle...

anybody else experience this?

Yep, noticed the same thing a few times today during upshifts while driving relatively aggressively.

JvKintheUSA · 04-04-2010, 09:59 AM

Quote:

Originally Posted by TheSnakeJake

i was out driving my car today (just got it last night) and it definitely blipped the throttle between my 3-4 shifts. it happened a few times, but only during the 3-4 shift. this wasn't the throttle "lag" that you guys keep mentioning (i noticed that as well), this was an obvious blip of the throttle...

anybody else experience this?

I have the AT and a small throttle blip between 3-4 (or was it 2-3?) as well, but only when the engine is cold.

Mike@Blackline · 04-04-2010, 10:11 AM

Quote:

Originally Posted by m4a1mustang

Did they actually blip or did they just continue rising after you pressed the clutch? The flywheel in these cars is rather heavy so it's not uncommon for the revs to rise a bit between shifts because of the flywheel's momentum.

same for 350Z
this is most likely it

NCSUPACK09 · 04-04-2010, 10:17 AM

It is the flywheel momentum...if you go WOT and then shift at say 5k, the flywheel momentum will carry the RPMs up another 500 or so, but if you take it to redline and the engine is winding out, you don't really get this effect.

PapoZalsa · 04-04-2010, 10:25 AM

That blip happened to me but with the SRM on.

04-04-2010, 10:17 AM	#21 (permalink)
NCSUPACK09 Enthusiast Member Join Date: Jan 2010 Location: Somewhere Posts: 407 Drives: '10 370Z MB 6MT SP Rep Power: 15	It is the flywheel momentum...if you go WOT and then shift at say 5k, the flywheel momentum will carry the RPMs up another 500 or so, but if you take it to redline and the engine is winding out, you don't really get this effect. __________________ 2010 Base 370z Magnetic Black 6MT SP Mods: Bone Stock

04-04-2010, 10:25 AM	#22 (permalink)
PapoZalsa A True Z Fanatic Join Date: Nov 2009 Location: Not in Sunny Florida Posts: 6,358 Drives: 16 Nismo w/Tech Pack Rep Power: 4500	That blip happened to me but with the SRM on. __________________ 2009 370Z MB Base w/Sport Package 6MT Modshack's Custom Air Intakes /3M Clear Bra/ Illuminated Kick Plates / F. I CBE w/12" resonators / EVO-R Front Lip / Rear Hatch Wing / Tein S-Tech Springs /Ilegal Tint in the Rep. of VA/4x20mm Z1 Spacers/ Vinyl Roof/Liquid Carbon Designs

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03-03-2010, 07:22 AM	#16 (permalink)
Pharmacist A True Z Fanatic Join Date: May 2009 Location: Toronto, Ontario Posts: 1,249 Drives: 09 370z Sport 6MT Rep Power: 18	happens to me all the time. easiest way to see it is start from a stop, rev a little and slip the clutch for a couple of seconds, then lift off throttle and simultaneously push the clutch back in. you should notice a slight rpm increase for a moment. like others said, it's probably due to a mix of a heavy flywheel and also a slight lag time in the response of the electronic throttle

03-03-2010, 06:59 PM	#17 (permalink)
TheSnakeJake Base Member Join Date: Feb 2010 Location: Cincinnati Posts: 84 Drives: none Rep Power: 15	i was out driving my car today (just got it last night) and it definitely blipped the throttle between my 3-4 shifts. it happened a few times, but only during the 3-4 shift. this wasn't the throttle "lag" that you guys keep mentioning (i noticed that as well), this was an obvious blip of the throttle... anybody else experience this?