Just got a new to me 2015 Q50 with the 3.7L engine. I went with the 3.7L as I am not a fan of Turbos. Maybe someday, not today, and that's why I also went with a V8 for my F150.

Anyhow, what I noticed and my wife noticed is the "immediate" acceleration that we so love on the 2008 G35 does not appear to be present on the Q50 - even when in sport mode.

G35 - stomp that gas standing still OR going 50MPH, it takes off like a bat out of hell.
Q50 - stomp that gas standing still, it takes off - almost like a bat out of hell from standing still, but definitely hesitates (almost) like my Dad's old Chevy impala when he wanted to "get into it" and it would downshift. It eventually goes, but it's not "instant" like the G35.

Is it the new 7 speed tranny?
Is there any fix to get more of an "instant" acceleration like the old G35?

Thanks.

Then consider yourself fortunate that you didn't opt for the 2016+ 3.0 tt engine. In my experience, that one is even slower-feeling than the 3.7. I've had the 2017 and 2018 3.0's, prefer the 2015 I currently have.

varnco wrote: ↑

Sat Jan 25, 2020 3:46 pm

Just got a new to me 2015 Q50 with the 3.7L engine. I went with the 3.7L as I am not a fan of Turbos. Maybe someday, not today, and that's why I also went with a V8 for my F150.

Anyhow, what I noticed and my wife noticed is the "immediate" acceleration that we so love on the 2008 G35 does not appear to be present on the Q50 - even when in sport mode.

G35 - stomp that gas standing still OR going 50MPH, it takes off like a bat out of hell.
Q50 - stomp that gas standing still, it takes off - almost like a bat out of hell from standing still, but definitely hesitates (almost) like my Dad's old Chevy impala when he wanted to "get into it" and it would downshift. It eventually goes, but it's not "instant" like the G35.

Is it the new 7 speed tranny?
Is there any fix to get more of an "instant" acceleration like the old G35?

Thanks.

Unfortunately they are a little "lazy" feeling, but having owned a G35 before it I don't really feel like it's that noticeable myself. The 7spd automatic can really have a mind of it's own and even in Sport mode there's not a noticeable difference as you mentioned. I did add cold air intakes to mine, but other than that it's still stock. I'm planning on having it tuned soon, which i've heard will help with the response a lot as some of it is due to the drive-by-wire throttle system but there is no way to tune the transmission unfortunately.

I also haven't been that impressed with the VR30(3.0 TT) so far. They're getting great numbers out of them with modifications and tuning, but I have heard a lot of horror stories about them coming unglued if not modified properly. I've driven both a Red Sport(400hp) and the normal ones(300hp) and they feel better than the 3.7 in some aspects, but nothing substantial enough to make me want one. I will say something about the 7 spd auto in them is tuned differently. It's the same transmission, but in sport mode it behaves MUCH differently. It's a lot more aggressive and responsive with upshifts and downshifts to keep you in the powerband. I assume they did that to get the most out of the turbos, but that is the only thing I noticed that was better on them.

My '14 Q50s is much lazier from a shifting perspective than my Q60RS. Neither are optimal as both will hesitate more off the line than my '08 G37 with 5AT. Now, from a tip-in perspective the Q50 is much more sensitive.

The Q50 I drove as a loaner car had two sport modes. The obvious one and one hidden in the menus on the display screens. Turn the sport mode on in both places and the car woke up like crazy.

That being said my 07 G35 Sedan 3.5HR still felt quicker. On the factory tuning before any updates the throttle response was almost too aggressive. The update flash that Uprev based their tuning on was lame by comparison.

Tuned/Moded I can stomp the 07 at 60 mph and still haze the tires.

Uprev tuned by me with their throttle map, K&Ns, HPS intake tubes, Stillen underdrive pulley, DC Sport headers, Z1 highflow cats and a custom 2.5" exhaust with a X-pipe, 2 magnaflow 4" case 18" long magnapack mufflers in place of the resonators and 2 magnaflow 14" case offset inlet/center outlet mufflers in place of the rear mufflers.