Slow revs - United Bimmer Community

**NavyL7** · 05-02-2007, 08:11 PM

This 328 is the first BMW I've owned.......so, I'm wondering about the rev's. when I rev the RPM's up, it is fine, revs fast as expected. After I let off the accelerator, the RPM's just kind of hang........they come back down pretty slow. Is that normal for the 2.8 on a 5 speed? It isn't a problem, just strange. I figured maybe the BMW's have a heavy flywheel.

**215BIMMER535** · 05-02-2007, 08:14 PM

cant give you a reason or explanation, but i have a 328 and its been that way since i got it. i think its just how they are. my old car was a 4 cyl so i was used to the rpms droppin as quick as theyd come up. it probly is the flywheel weight or something of that nature

**3050rpm** · 05-02-2007, 08:28 PM

I'm not sure, I came across it somewhere but can't remember the particulars, but I think it may also have something to do with controlling emissions. Sorry I can't be of more help than that.

**chris325i** · 05-03-2007, 12:34 AM

yeah i wandered about that too. my 325i does that. at least now i know im not the only one. haha

drz · 05-03-2007, 01:28 AM

Inertia.

**maximk2** · 05-03-2007, 05:22 PM

yeah i noticed that with my 325i as well. I would guess it's because of the length of the engine (inline 6),

**xsperf** · 05-03-2007, 06:35 PM

get a lightweight flywheel, that'll change

**NavyL7** · 05-03-2007, 07:11 PM

Just had a clutch put in, so the light flywheel will have to wait.