12a vibration

12arotary · 02-17-2010, 02:25 PM

I had a huge vibration issue with my 82 when my pressure plate decided to loose two of it's teeth and threw it off balance, does it drive fine?

striegels6 · 02-17-2010, 07:19 PM

It's a mess. I am trying to weigh my options at this point. If i could find a good used intake and carb I might try to keep the 12a in it. A 13bT sounds like a better option.

t_g_farrell · 02-18-2010, 10:02 AM

I run the lightest flywheel for a 12a in my 80 SA stockport. Its an 82 I think only weighs 23# versus 30# for the stock. I get some very minor vibrations from it but nothing too bothersome. Its been on there the last 4 or 5 years no problems.

I also talked to some folks that race 12as and this is a pretty common mod to do and still stay legal for the flywheel in some classes.

Madaz · 02-19-2010, 12:56 AM

If the vibration IS present when the vehicle is static and clutch is engaged then remove the gearbox and check your flywheel,counterweight and pressure plate. If nothing obvious doublecheck the counterweight is indeed a 12A counterweight.

02-17-2010, 02:25 PM	#1
12arotary tumor-syphilis-itis-osis Join Date: Sep 2008 Posts: 191 Rep Power: 17	I had a huge vibration issue with my 82 when my pressure plate decided to loose two of it's teeth and threw it off balance, does it drive fine? __________________ 82 300d 82 Gsl 84 b2200 Diesel 88 gxl

02-18-2010, 10:02 AM	#3
t_g_farrell Waffles - hmmm good Join Date: Aug 2008 Location: Huntersville, NC Posts: 757 Rep Power: 0	I run the lightest flywheel for a 12a in my 80 SA stockport. Its an 82 I think only weighs 23# versus 30# for the stock. I get some very minor vibrations from it but nothing too bothersome. Its been on there the last 4 or 5 years no problems. I also talked to some folks that race 12as and this is a pretty common mod to do and still stay legal for the flywheel in some classes. __________________ 1980 GS stockport, Fat Nikki, RB Dual Facetfuel pumps, Holley regulator, RB Street port exhaust, 2GDFIS, MR2 MK I electric fans, 2G strut bar, relayed fans, lights and fuel pump, LEDs Project Fat Nikki Budget 12A rebuild Video setup < $30.00

Thread Tools
Show Printable Version Email this Page
Display Modes
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode

02-17-2010, 07:19 PM	#2
striegels6 The Newbie Join Date: Feb 2010 Location: Iowa Posts: 6 Rep Power: 0	It's a mess. I am trying to weigh my options at this point. If i could find a good used intake and carb I might try to keep the 12a in it. A 13bT sounds like a better option.

02-19-2010, 12:56 AM	#4
Madaz Rotary Fan in Training Join Date: Jan 2009 Location: Burleigh Heads QLD Australia Posts: 56 Rep Power: 17	If the vibration IS present when the vehicle is static and clutch is engaged then remove the gearbox and check your flywheel,counterweight and pressure plate. If nothing obvious doublecheck the counterweight is indeed a 12A counterweight.