Have a Q' on lightweight flywheel and underdrive pully

Chambers · 09-04-2007, 08:58 PM

Hi all, I was wondering if I plan to keep AC, and not using the car for strict strip, and track use, is it worth putting a lightweight flywheel paired with lightweight pullies? Thanks.

j3pz · 09-04-2007, 11:20 PM

i cant say anything about the pulleys, as ive never used them, but in theory it would remove some rotating mass, however i dont hear to many mkiii owners using them... on the other side, i have an aluminum fidanza flywheel, and you can feel a weight diference between stock.

edit: as for the ac, it creates relatively no load on the engine unless it is engaged, so as long as its off the pulley will spin freely

Chambers · 09-04-2007, 11:30 PM

Thanks, I was looking at the Fidanza flywheel, I planned on putting that in it's just that with the pullies it seems like to me that with less wieght turning the with the crank running the ac would really bouge down the engine, but I'm not entirly sure if thats true.

dcrusupra · 09-05-2007, 12:12 AM

If you change the pullies, leave the crank pulley on. It has a harmonic dampner built into it. Change that and you'll have to completely balance everything in the engine to that pulley.

Chambers · 09-05-2007, 12:53 AM

Ohh, big thanks on that one, completly forgot about the balance. I guess I'm not doing the crank pulley anymore, thanks again.

abhattan · 09-05-2007, 10:43 PM

Also, at idle, the AC will not be as efficient if you change the damper pully. Although, there might be someone out there that makes a balanced lightweight pully.

09-04-2007, 08:58 PM	#1
Chambers walbro fp Join Date: May 2007 Location: USA - Harford County, Maryland Posts: 481	Have a Q' on lightweight flywheel and underdrive pully Hi all, I was wondering if I plan to keep AC, and not using the car for strict strip, and track use, is it worth putting a lightweight flywheel paired with lightweight pullies? Thanks.

09-04-2007, 11:20 PM	#2
j3pz 500whp yet? Join Date: Nov 2005 Location: Mechanicsville, MD, US of A, 20659 Posts: 1,060	i cant say anything about the pulleys, as ive never used them, but in theory it would remove some rotating mass, however i dont hear to many mkiii owners using them... on the other side, i have an aluminum fidanza flywheel, and you can feel a weight diference between stock. edit: as for the ac, it creates relatively no load on the engine unless it is engaged, so as long as its off the pulley will spin freely __________________ 88 N/A w/ 5spd - stock - not running, bhg 87 turbo/targa w/ 5spd- fidanza light weight flywheel, new oem slave cylinder, apexi air filter, no ac and no heat Last edited by j3pz; 09-04-2007 at 11:23 PM.

09-05-2007, 12:12 AM	#4
dcrusupra 500whp yet? Join Date: Aug 2005 Location: Plantation, Fl. Posts: 1,052	If you change the pullies, leave the crank pulley on. It has a harmonic dampner built into it. Change that and you'll have to completely balance everything in the engine to that pulley. __________________ New Rebuild My CarDomain

09-05-2007, 10:43 PM	#6
abhattan 3" Exhaust Join Date: Oct 2006 Location: Brentwood, New York Posts: 162	Also, at idle, the AC will not be as efficient if you change the damper pully. Although, there might be someone out there that makes a balanced lightweight pully. __________________ '91 Turbo Targa 5 Spd. '87 Corolla GT-S 5 Spd '91 Accord Daily Driver 5 Spd Soon to be rebuilt (All to some extent)

09-04-2007, 11:30 PM	#3
Chambers walbro fp Join Date: May 2007 Location: USA - Harford County, Maryland Posts: 481	Thanks, I was looking at the Fidanza flywheel, I planned on putting that in it's just that with the pullies it seems like to me that with less wieght turning the with the crank running the ac would really bouge down the engine, but I'm not entirly sure if thats true.

09-05-2007, 12:53 AM	#5
Chambers walbro fp Join Date: May 2007 Location: USA - Harford County, Maryland Posts: 481	Ohh, big thanks on that one, completly forgot about the balance. I guess I'm not doing the crank pulley anymore, thanks again.