Lightened pulleys etc

We do not have an in-house dyno so all tests are independant The tests and link to the mags are all state-side and nothing to do with us.

I will state again that our experience for the motors listed show positive HP gains with 'zero' evidence of failure or adverse effects with the hundreds of direct installs and thousands sold State-side whether they be UR, ASP, AMS etc.

The R35 was smoother after the install of our pulley and according to the owners butts they are smoother and add some linear power

My butt also says that our corporate Z and even our $200,000+ Porsche Turbo (which has a solid pulley) yields nice results.

Note - butt dynos may vary depending on geographic regions

Once again I am just stating what our experiences have been nothing more nothing less No crank failures or bearing failures attributed to solid pulleys in other words on the engines in question.

Regards,

Vuk@AMS

 

that seems like a lot of work. I assume you do a lot of travel.

 

This is exactly our findings in our corporate Z and many other builds over the years ranging from stage 3 to nearly 700 whp using solid pulleys

Regards,

Vuk@AMS
www.amszstore.com

 

no not really , just racing , thrashing , more racing , high speed runs .. draging etc etc ....

 

Only 5 times. Why did you need to always replace bearings? How many k's?
I have never had to replace my bearings, although if I stayed with the one peice allloy pulley I tried years ago, and with the punishment my motor cops, I am sure I would have needed to. I took it off as vibrating. My motor has been in the car for 4 years of racing.

 

Cool, sounds like you have a lot of fun with that thing.

 

i just do it coz i can really .. if something goes in the engine , or if im changing something or what ever , i alway strip it down and do all of it ,

yours is doing 320rwkw yes ???

 

Wow, this is quite the discussion. I didn't read each and every post since it seemed to get dragged off topic switching to GTR's for some reason when the original post/theme was for pulleys for the Z32.

Perhaps I may have missed the post but who's Z32 engine actually broke (flew apart) after using UD/OD after-market pulleys? I couldn't find it ..... anybody????

 

not mine 100%

 

But dyno's are funny things. We have had customers swear their cars making more power with their chip or their....... We put it on our placebo detector ( dyno ) and actually less power. So hopeful customers, magazines and internet info, is not always right. Although it certainly can be to, and can find out good info but? I am not saying it doesn't or can't make more power, but at what potential cost even if it does.

Do you have a link to this GTR dyno reading you did and other zeds? Have you seen similar power, or more or less with lighter flywheels?

VUK, have you spoken to any automtoive engineers about this pulley deal yet?

 

I was being sarcastic with the butt dynos!

The proof is in the pudding as they say and the dynos are all over the net. It does make power on the NA and TT variants!

I believe TT.Net has several posts regarding dynos and power increases and all the biggest tuners in the Z scene use and sell these.

When we speak of 'potential' for this or that we are theorizing? Once again I am not theorizing but giving real world feedback on the hundreds of installs and thousands sold with not a single documented case of failure pointing to a solid pulley on the motors I mentioned.

As for the engineers we have several clients along with our manufacturers who have engineering degrees. So not sure of what the issue is here? I am still yet to see hard evidence on our applications or the motors I spoke of other than rhetoric and perceived conceptions relating to the VG?

So once again going in circles as we have had nothing but positive gains with the use of solid pulleys with 'Zero' direct, real-world usage within the largest Z market (NA).

Regards,

Vuk@AMS

 

Even if the bearings show no signs of wear our builders practice is always to throw a fresh set in considering the new bearings are peanuts (in our market) to replace. Very small price to pay for added insurance

Regards,

Vuk@AMS

 

I think I was being sarcastic to, having fun.

I know of two big motors years ago failed do to bearing failure and the non harmonic balancer was the candidate, and ALL GTR's that trie it years ago, ran bearings, which was conclusive.

Very few zeds would ahve bearing failure in short term and hard to prove, however as how many zeds noticed increase in vibration? If added noticable vibration in motor then guess what? Maybe it is a northern hemisphere exclusion, lol. Not many over here but a definate small amount as per this thread and others. I have found heaps of people not aware of the vibration from sagged centre bearing in their tailshaft, until we fix it by replacing it.

I am theorising and talking from real world testing and experience on dyno, road and race track.

Re the engineers you are kidding right?? Same language engineers, and automotive ones?
How do they explain what happens on GTR's, if nothing else changes?

 

Might be time to agree to disagree.

Neither of you will be able to convince the other that you are correct. Your opinions are on the forum for people to read and make their own choices.

 

Agree Ian, and we agree on some things, they are no good on GTR's, as they increase vibration. Informative for others adn this is what forums are good for, dicussion and putting out theories, facts, tests, and experiences for everyone to read, review and assess. If I say something that VUK or others knows or believes to have questions, I expect him or them to pipe up, as I have.

 

Seconded Ian.

 

Me to and if you don't want to know about it, don't read this. THese guys are in USA to.

http://www.atiracing.com/products/dampers/damper_dinan.htm

 

More interesting I just did a google search and came up with heaps, some from USA to. Some for and some against, enough against though, with some solid theory and examples of issues, or examples of failures to raise questions, and for what a few kw's.

http://www.usimports.org/forum/showthread.php?t=4994

http://www.usimports.org/forum/showthread.php?t=4994

 

I have a lightweight pulley,lightweight flywheel,carbon driveshaft and i get no vibrations from the engine :cool2:

 

^^^ Same here as well.
Complete set of lightweight pulleys, 11 lb flywheel and lightweight 1pc driveshaft = no vibrations.

Why do we continually deviat from Z32's to emphasize "potential" vibration issues?

Still, don't see anyone posting that theirs or other's Z32 suffered engine failure due to lightweight pulleys.