T1R Crankshaft Pulley, Anyone installed yet?

Another thing to consider is the radius. A fly wheel is much larger than a pulley and torque is measured in ftlb (feet times pounds) so distance from the axis makes as much difference as weight, and in a pulley that 4lbs difference is only about 2 inches from the axis.

that is very true. the only thing you would gain from this besides a placebo is the awe you would get every time you open your hood to show a friend. if someone would buy me a pair i would be more than happy dyno it.

This post has been edited by ans2k on Oct 4 2009, 11:02 PM

Here is a twist to this thread...

This guy says that OEM dampeners only work at THE OEM RATED HP

if you increase your HP then you need to look into an aftermarket dampener or you're potentially doing as much damage as using an un-harmonically balanced pulley.

as my dad used to say "how do you like them apples" :rofl"

whole article here

^ anyone wants to translate that for me?....

i read the whole article and stile dont get it. they talk about old cars, so that not about the s. the imports are similar to the americans. but i thought our engines are internally balance. twist? vibrations? can someone explain?

What he is saying is that all the assholes who said how important the OEM balanced pulley is are wrong.

Get it now?

People change flywheel weight all the time with no bad side effects, I doubt that a small pulley running a belt is going to make a difference. And as for the people about the harmonic balance they have no clue what they are talking about. Harmonic balancer offsets the weight of the pistons to make the engine run smoother/less vibration.

I would consider this part mainly a cosmetic item with minimal gains, no need to worry about ruining a motor from this part.

you guys are retarded. the article is from 1979, jesus christ.

^^ I know exactly what i was thinking... it's the vibration etc in the first place that you want to harmonically dampen... Think we need to put some acceleromators on the end of a balanced and unbalanced and see the difference...

yeah cause the mechanics of internal combustion engines have changed so much since then...

--- kids


The the article specifically noted our exact OEM harmonic dampener design (bi-metal separated by polymer) and said that type was engineered for the specific OEM hp rating and, being non-adjustable, couldn't work as designed after the torque and hp increase resulting from aftermarket tuning.

He suggested that since harmonic dampening was important for high hp engines, an adjustable aftermarket dampener (which could be tuned to the specific setups) would be a good idea if you were modifying the power of your car.

I got the pulley's on my 01, and have had no issues. I got all the pulley's not just the crankshaft. I noticed a rather impressive diffrence after the install. It pulls non stop all the way to redline, and from a dead stop in 1st gear, start to roll without dropping the clutch and at V-Tec engagment the tires break loose. Thats with exhaust, test pipe, and intake. I haven't had any issues yet since the install. I will say that damn crankshaft pulley bolt is a real pain in the ass to take off though!

Hi, I race a westfield with the F20c engine and have had a solid billet crank pully on the engine for three seasons of racing without issue. When the engine was stripped down after two seasons the crank journals and bearings were 110% perfect with no sings of wear. Im also running an exedy paddle clutch and cromolly flywheel. I think the main issue with aftermarket crank pullys is making sure the tolerances are as per the oem pulley. I have heard of the back of the pully which sits in the oil seal either being slightly undersized or oversized causing an eventual oil leak. The pully on my car was made using the specs of the oem pully and was hard adonised to prevent wear from the belt.

Still no Dyno

I ran one on my Eclipse for about 50,000 miles. I never had any problems what-so-ever. I never even noticed more vibration. I was thinking about getting the T1R myself as soon as my Christmas shopping is finished.

the oem pulley is not a harmonic damper or whatever, the rubber in the pulley is to soften the engine pulses going through the belt to the alternator, etc. there is nothing harmonic or balancing about it.

the t1r pulley probably dosnt gain much as its not underdrive, a couple lbs that close to the center of rotation isnt going to do much as someone else here has said.