I purchased the 2005 Roadster Touring model 5 weeks ago and already dumped $2200 in modifications. ( That means I will be eating Mac & Cheese for a while). Anyway, The first things I had added were CAI and Borla TD exhaust. Of course I did not realize that I would lose low end power with the TD, but I did see some moderate improvements in mid and high end. I then had DC headers and a UR pulley kit installed and WOW did that make a world of difference. It is quicker throughout the whole power curve and once I hit 5k rpm it feels like I am hitting the power band on a two stoke dirt bike…well maybe not that intense but it’s impressive.

The only thing I worry about is the warranty. If something goes wrong what parts would I want to take off and what could I leave on? Also, has anyone had any issues with this combination? Appreciate any input.
RRJ

 

I also noticed a HUGE difference with the UR Pulleys. The car revs much stronger. It depends on what warranty work you are bringing it in for... If you have a problem with your tranny dont worry about ur UR Pulleys being on. Whereas if something is happening with your crankshaft you should then take off the pulleys and return them to stock..

 

i was thinking about getting the pulley.maybe i should stop thinking andget it.did you guys get new belt?did you install it yourself?
and who has the best deal on a crank pulley???????????

 

I love the UR pulley

car revs and feels so much smoother

 

I purchased my pulley kit from http://vrsm.vividracing.com and they installed it as well. Vivid treated me very well and they have the best rate around (usually $75hr but they had a $60hr special for March). The mechanic said the hardest one was the alternator, because he had to pull it off. You could just get the crankshaft pulley and get the same results, as the other two are for looks only. They also had to change out the belts, because the under-drive crankshaft pulley is smaller. Install on the headers and pulleys ran me $360. The change in acceleration is fantastic and more than compensates for the loss of low end with the dual exhaust.

 

there not just for looks, every little thing helps.

 

did you guys notice any issues with your interior power when slowing down or anything?? i heard since you minimized the crank, you alternator will be spinning less causing some sort of stress on your alternator...well guys tell me: did any of you feel a difference; such as windows losing power, lights dimming, stereo acting funky??

 

Hmm I had decided against pulleys, u guys have sparked my interest again...more money down the hole! Ya any input on stress to the alternator? I have a pretty high power system in my car, problem? Thanks

 

there are nothing but upsides to the pullies on these cars

 

thats not exactly what i've heard...

btw i have nothing against the pullies, ive been wanting to buy them myself. but like i said, ive been told stories -by pulley owners- about energy problems and other component stresses...please correct me if im wrong!!

 

Here comes the harmonic balancer/dampener debate.

 

Try to find a single Z owner that has registered such a complaint. There are some cars where pullies cannot be installed on a motor without a complete rebalancing - the Z, and the VG and VQ series motors as a whole, are not one of these

 

Ihas,

Did you keep the stock cats in place or replace them as well?
I'm wondering how your setup sounds...do you get any raspy noises or is it all nice-nice?