are ULTRA SS PLYS BLK 02-03 G35 3.5L V6 (CRK,ALT,IDLER) safe to put on my G? Here's link i got from Stillen:
http://stillen.com/sportscars_detail...d=33337&page=8
if this is safe...then i'm gonna do it! i heard the crank pulley wasnt that safe though! any help would be appreciated!

KhaL

 

I talked to Ultra today at Stillen Day, they said they'd never heard of this problem (as posted somwhere in here...)

He gave me a card and promised that if I forward the thread, they'd give a full response to the "allegations"

cheers,ted

'03 Sedan 5a: BS/G, Prem, Aero/Body, Sport, Nav
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The text on the Unorthodox site is a pretty good description of how the extra power is achieved by the pulleys - and it isn't from underdriving the accessories. But their comment about a 15-30% hp increase is missleading.

There are real issues with replacing the crank vibration dampner to reduce pulley weight. The external dampner is there for a reason, and removing it will cause some extra wear and possibly damage to the crank. Is the G engine internally balanced or externally? Don't know.

 

I'm hoping they'll respond to this: Dinan Article

....-T

'03 Sedan 5a: BS/G, Prem, Aero/Body, Sport, Nav
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That's exactly what I was talking about....

 

i see i see....well once you guys learn more about them...please just let me know whether i should get them. I'm not looking to get the crank pulley...but the other ones. Thanks for the help!

 

Is the crank internally or externally balanced? I had a crank pulley on my '01 SS camaro because it was internally balanced. But when it came to a crank pulley I wanted the best even though quite $(even though most on the camaro boards used ASP pulleys), ATI (not the same company that makes superchargers)makes the best pulleys, balancers. But they are $, and I don't know if they make one for our cars yet. http://www.atiperformanceproducts.co...rs/dampers.htm

 

From what I understand, your gain is only a handfull of hp's. And looking at the cramped space and need for parts to come out to get to some of those pulleys in, to me it's not worth the chance of upsetting the balance of the engine, not to mention the time and expense.
On this car I'm not going to bother.
GSM

<font color=red>GSM</font color=red> <font color=black>Silverstone Coupe</font color=black>

 

i guess i'ma have to look up on it and see if i can do it or not. thanks though!

KhaL

 

You know I am concerned about the aftermaket pulleys issue too. Spoke with a Nissan Engineer, he gave me the same story as the Dinan one.

 

I've been told 1) Our engines are balanced internally 2) the accessory pulleys are for looks only and don't do a damn thing. Only by reducing the weight of the crank pulley do you see any benefit.

I've had my crank pulley on for 8k miles, 11 autocrosses, and 2 days at the track, with absolutley no problems.

'03 AT Sedan | Brilliant Silver | Willow Leather | Sport | Premium | Aerokit w/Spoiler | Nav

 

https://g35driver.com/forums/showfla...orth responded




'03 Sedan 5a: BS/G, Prem, Aero/Body, Sport, Nav
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excellent! thanks so much for that! so...after reading that i guess its safe to add on a crank pulley. Should i do all of the pulley or jus the crank pulley? I would love to get some more power to the wheels but i'm not looking to do a supercharger or turbo till i get my 6-speed coupe! Thanks for all your help G's!!
KhaL

 

Does anyone already have the underdrive pulleys installed? i was wondering how much power we should expect and if anyone had any problem with them! Thanks!

KhaL

 

This site has some graphs showing before and after hp for different cars:
http://www.se-r.net/car_info/dyno/