Unorthodox pulley....really worth it????
10-22-2005, 09:18 PM
#21
Registered User
iTrader: (1)
Join Date: Sep 2003
Location: Montreal, Canada
Posts: 1,035
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by idrmofs7
the pully bein "lighter" will mess with your harmonic balance. this pretty much means that your car will run real rough at idle only. Also all these aftermarket pully's will make your belts sqeal like crazy unless you get goodyear gaterbacks ,I think. but if you are tryin to get all the power outta yourmotor as possible then do it but it should be one of your last mods.also, try to get your crank re-balanced after.hope this helps 
Why would a pulley require rebalancing the crankshaft? do you have any clue of what rebalancing a crankshaft requires?
Last edited by Nano; 10-22-2005 at 09:22 PM.
10-22-2005, 10:15 PM
#22
Registered User
Thread Starter
Join Date: Apr 2005
Location: Houston, Texas
Posts: 130
Likes: 0
Received 0 Likes
on
0 Posts
Well....I've read all the threads on the harmonic balancing types of things....apparently it does not make a difference on the balancing due to the Z's engine having internal balancing already. I was strictly curious on the power and feel of the thing and i believe the harmonic issue is really not a problem, or that's the conclusion from most of the threads.....
10-23-2005, 04:56 AM
#23
Former Sponsor
iTrader: (564)
Join Date: Feb 2003
Location: Long Island, New York
Posts: 19,266
Likes: 0
Received 5 Likes
on
5 Posts
Originally Posted by idrmofs7
the pully bein "lighter" will mess with your harmonic balance. this pretty much means that your car will run real rough at idle only. Also all these aftermarket pully's will make your belts sqeal like crazy unless you get goodyear gaterbacks ,I think. but if you are tryin to get all the power outta yourmotor as possible then do it but it should be one of your last mods.also, try to get your crank re-balanced after.hope this helps
10-23-2005, 09:49 AM
#25
Registered User
iTrader: (2)
Join Date: Aug 2005
Location: New York
Posts: 762
Likes: 0
Received 0 Likes
on
0 Posts
is there another tool to use rather than a pulley puller?
i changed my supercharger pulley on my grand prix gtp but i had a friend of a friend do it b/c he had the tool.
i changed my supercharger pulley on my grand prix gtp but i had a friend of a friend do it b/c he had the tool.
10-23-2005, 01:32 PM
#28
Originally Posted by idrmofs7
the pully bein "lighter" will mess with your harmonic balance. this pretty much means that your car will run real rough at idle only. Also all these aftermarket pully's will make your belts sqeal like crazy unless you get goodyear gaterbacks ,I think. but if you are tryin to get all the power outta yourmotor as possible then do it but it should be one of your last mods.also, try to get your crank re-balanced after.hope this helps
10-23-2005, 03:00 PM
#29
Registered User
iTrader: (6)
Join Date: May 2005
Location: King of Materbation
Posts: 3,682
Likes: 0
Received 0 Likes
on
0 Posts
Just get the UR. I would buy them again in a heart beat... My car feels better then it did with stock pulleys. Supposed to yield around 5whp... I noticed a difference as everyone also stated above. One of the best Mods for the dollar.
Edit:Spelling.
Edit:Spelling.
Last edited by EM-EFER; 10-23-2005 at 03:29 PM.
10-23-2005, 07:34 PM
#31
Originally Posted by DZ2005
Well....I've read all the threads on the harmonic balancing types of things....apparently it does not make a difference on the balancing due to the Z's engine having internal balancing already. I was strictly curious on the power and feel of the thing and i believe the harmonic issue is really not a problem, or that's the conclusion from most of the threads.....
10-23-2005, 08:05 PM
#32
Registered User
iTrader: (5)
Join Date: Apr 2004
Location: Michigan
Posts: 454
Likes: 0
Received 0 Likes
on
0 Posts
The KJR pulley is machined out of a solid piece of aluminum. It is not a 2 piece like the stock. You can read 20 pages of threads on the debate over whether or not the rubber separation is for noise reduction or for vibration reduction. As long as the pulley is balanced, it is ok.
KJR just pulled the motor on a Z that had 12k in miles with the KJR pulley and by visible inspection no bearing or crank wear was found. It's my motor so I am going to forge it up but am going to use a different crank because the one out of my engine is going to be looked at further along with the bearings.
If anyone on the boards rebuilt a motor at 22k and have original bearings lying around, I would love to have them sent to me for even more comparison. The guy I have examining the wear says he doenst need another set but it would just further reinforce the data.
KJR just pulled the motor on a Z that had 12k in miles with the KJR pulley and by visible inspection no bearing or crank wear was found. It's my motor so I am going to forge it up but am going to use a different crank because the one out of my engine is going to be looked at further along with the bearings.
If anyone on the boards rebuilt a motor at 22k and have original bearings lying around, I would love to have them sent to me for even more comparison. The guy I have examining the wear says he doenst need another set but it would just further reinforce the data.
10-24-2005, 10:23 AM
#33
New Member
With the UR pulley the car will rev alot quicker than stock. Also it adds around 5-6rwhp... I think. But it does make the car rev and throttle response is awesome. Also the 350z doens't have a harmonic balancer.
10-24-2005, 03:37 PM
#35
Registered User
Join Date: Sep 2003
Location: Southern California
Posts: 450
Likes: 0
Received 0 Likes
on
0 Posts
have had the UR for close to 20k miles. love it. I do blackstone oil analysis with every oil change. No undue wear reported.. in fact they give me a thumbs up and "great wearing engine" comment every time.
Don't have a comparo dyno, as it went in with a bunch of mods. I agree with all the throttle and wind up comments above.
Ultra SS includes the accessory pulleys, not just the Crank pulley.
_T
P.S. I have a G sedan.
Don't have a comparo dyno, as it went in with a bunch of mods. I agree with all the throttle and wind up comments above.
Ultra SS includes the accessory pulleys, not just the Crank pulley.
_T
P.S. I have a G sedan.
Last edited by SoCalTed; 10-24-2005 at 03:40 PM.
10-24-2005, 03:44 PM
#36
Yes its worth it. Its a cheap mod and only takes 30 min to install with no special tools other than a breaker bar and a pipe to slide over the breaker bar. Set the bar on the pulley and at the 5 o'clock position on the ground. Turn motor over but do not start the car. Two clicks of the starter and the pulley is loose. Install of the new pulley is even easier.
11-03-2005, 05:28 PM
#39
Registered User
Originally Posted by rb6sn
how much would it cost to get this installed at a shop? im pretty bad with this kind of stuff.. 
11-04-2005, 07:29 AM
#40
Registered User
Join Date: Oct 2005
Location: Lake Havasu City, AZ
Posts: 46
Likes: 0
Received 0 Likes
on
0 Posts
Something to consider. Is it worth the 6whp gain. If you have a failure IE pulley cracks and crank bolt comes out enough to let the pin that alligns the crank pulley / timming pulley come out and you bend all your valves. Far fetched yes, but I had to rebuild the top end of my G35 when this happend to me 
.
.