The shocks are new, but I'll take a look. I don't know if this means anything, but let me repeat one thing. Under acceleration with torque on the motor and drivetrain the vibration is not too bad. Starts showing up ~ 55 mph. When you let off the accelerator at that speed, the vibration gets very bad and gradually goes away as the vehicle slows down to ~ 40 mph.
Thanks; Dennis -----Original Message----- From: Jay Summet [mailto:j...@summet.com] Sent: Monday, June 09, 2014 1:02 PM To: Pestka, Dennis J; Electric Vehicle Discussion List Subject: Re: [EVDL] Vibration -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 One thing to check is your non-drivetrain elements, although if you get the vibration without moving in neutral it's probably in the drivetrain. The reason I mention it is that our car had developed a vibration at the 58-60 MPH speed range, and it turned out to be rear shocks that needed replacing. Jay On 06/09/2014 07:49 AM, Pestka, Dennis J via EV wrote: > Removed the drive shaft, had new u-joints installed, and had it > balanced. No change. > > I’m guessing it’s either the angle on the motor/transmission in > relation to the rear end, or I may have to pull the > motor/flywheel/pressure plate/clutch assembly and have it balanced. > When I sit in neutral and rev to ~ 3000rpm, I’m getting some > vibration, although it doesn’t seem to be as bad as when I drive. Here > again I feel it at ~ 50 mph and up, but it is really noticeable when I > let off the accelerator at those speeds. > > Thanks; Dennis Elsberry, MO http://www.evalbum.com/1366 > http://evalbum.com/3715 > > > > > > From: Daniel Busby [mailto:busby.dan...@gmail.com] Sent: Tuesday, May > 27, 2014 1:52 PM To: Pestka, Dennis J; Electric Vehicle Discussion > List Subject: Re: [EVDL] Vibration > > I'd try balancing your driveshaft. It's relatively inexpensive once > you get it out. A local place in LA costs less than $70. > > My '64 Spitfire definitely has a wobbly shaft, but I haven't made the > time to pull it out and get it balanced yet. I stick to surface > streets in the meantime. > > On Tue, May 27, 2014 at 11:29 AM, Pestka, Dennis J via EV > <ev@lists.evdl.org<mailto:ev@lists.evdl.org>> wrote: Didn't know if > anyone had any clues to a problem I'm having. > > Since I have my new Lithium pack, I've getting my 65 Datsun out on the > highway and up to ~ 60 mph. Never did much of that before. When > accelerating, I don't experience it, but when I let off the > accelerator, I'm getting a pretty good vibration. Step back on the > accelerator, and it goes away. Don't seem to notice it at 45mph and > lower, but when going 55 - 60 mph. I just put new tires on it, and > have had the front end aligned. > > Any suggestions ? > > > Thanks; Dennis Elsberry, MO http://www.evalbum.com/1366 > http://evalbum.com/3715 > > > _______________________________________________ UNSUBSCRIBE: > http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing > discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA) > > -------------- next part -------------- An HTML attachment was > scrubbed... URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140609/18 > 6c7035/attachment.htm> > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing > discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA) > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEARECAAYFAlOV9psACgkQSWJjSgPNbM88UACeP3S/O6WsfiKM9/e7OvGVDxxY dywAnAmPcf3V/0v3S2PHpgyeu6JZp37f =qiv8 -----END PGP SIGNATURE----- _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
