I'd be interested, but I'm still concerned about belt issues in the long run. So I'm sorta playing the waiting game... any gray ones left?

Yes, red and gray kits are in stock.
Belts are usually only about $25 to $30, you only need one belt, and each one is usually good for about 40K to 50K miles.

:driving:

If you install both pulleys, Gates Belt K070786 fits perfectly.

Much appreciated. How's the fun factor in the higher gears (i.e., downshift to 2nd or 3rd and noticed slight lag... even worse with A/C on)? This is probably the most I'll mess with besides ECU tweak to further improve throttle response.

Most of our customers have reported much better throttle response through the entire RPM range, leading to smoother upshifting and more precise downshifting, due to the fact that rev-matching becomes easier with a more responsive engine.

Our 370 kit has been one of our most popular new kits and customers seem to love the benefits!

:tup::tup:

:confused:

i wanna get this but i gotta see a review first, but since its "one of your most popular new kits" then i shouldnt have to wait very long no?

x2 :confused:

While our 370Z kits have been very popular for us and have been selling quickly, we do have quite a few kits in stock at the moment.

We'll be here when you're ready :tup::tup:

I'm not sure why you are confused.
Can you please elaborate so that I can answer your question?

I just ordered mine from DD last night, with the new belt.
Should have it on the car in 2 weeks.
12.7's here we come.
Will post dyno results.

Excellent! Good luck and have fun with all your projects!!!

:tup::tup:

While what your saying is probably true that people do report it, personally seriously doubt a true perceivable effect. Happen to also be one of those that when the oil is changed, the car seems to run better yet I really know different.

Any performance car can have as much as a 15 hp greater gain just from morning to afternoon by having a front of cool dry air pass through yet no one seems to notice it. Butt dyno's seem to break down easily, results aren't very reliable and the correction factors way off. Hell, the air conditioner is usually a 20 hp parasitic drain, yet I'd bet most can't tell if the air is on or off when they drive.

In comparison to other cars I've owned, one of the things I don't like about the 370Z is a delay in throttle response and a disconnect feel regarding revving both up and down. Simply a lag and delay I'm not used to. Hoping tuning software will correct this somewhat or it may even be a hidden function of the Rev Matching that I never turn off.

What I did notice from an under drive pulley is the car is less prone to spinning the tires upon hard shifting as the lighter pulley reduces the flywheel effect. The clutch may also be breaking in and that might contribute to the lessened wheel spin also but it would be very coincidental if it did.

Anyone whom is saying they notice a 3-4 hp gain is smoking some good dope or seeing the image of Christ in clouds. Maybe both. A wise decision to add the pulley(s) however, as 3-4 hp gains are how the big NASCAR and NHRA boys do it and it all adds up.

A/C definitely worsens this lag and delay that's so annoying when punching it in the higher gears. How's it going for you with this mod?

Going to have to say.......Great!!

Honestly, except for not spinning the tires as hard when you shift hard; can't tell the difference which probably is a good thing. By not spinning the tires as hard tells me the energy which would go into spinning the pulley instead is going to the tires. Which is also a good thing. Was surprised as to just how heavy the stock pulley and basically a mini-flywheel.

Been putting off putting the car on the dyno waiting on AccessPort software to get objective results, but in my mind until anything is proven otherwise, something I'd certainly do again. My next priority is getting the 4.08 gears (ordered two weeks ago) and getting them squared away but right now I'm a happy camper.