Stillen Crank Pulley
I would think that depending on how new the engine was before installation, this HP increase after 10K miles might possibly be the engine naturally getting stronger as it breaks in and have nothing to do with the pulley itself. Or maybe the pulley has FI and just a really, really long 10K mile turbo lag. 
If all goes as planned, I'll have it installed and the before and after dyno up tomorrow evening. 
I'm hoping for some good gains, but for the price, 5hp would be sweet in my opinion.
I'm hoping for some good gains, but for the price, 5hp would be sweet in my opinion.
I hope you get great results... my fingers are crossed.DOMO
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Joined: Jul 2008
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From: Chandler AZ
if I were you, I'd get a normal hp/tq sheet and then for sure get a time vs speed sheet as well. I really don't believe you'll see much, if any, gains in hp but I think if there's any gains to be seen it'll be in the time vs. speed chart showing it building revs quicker. won't take them but a couple clicks to show and print those sheets as well, the data is already there.
Here's a review from a Z owner of the pulleys on his HR: http://my350z.com/forum/vq35hr/38144...o-results.html .
Last edited by Buddy Revell; Aug 24, 2008 at 03:28 PM.
Well, everything is installed, but they can't dyno until Friday 
I will say this. I noticed an immediate improvement in rpm's revving and acceleration. I break loose now and get the slip indicator more often then ever before. I wasn't expecting much, but this addition has changed the driving characteristics for the better While driving, I can stomp on the gas and I'm put back into my seat instantly. I'm sure I'll see some numbers to back this up, and I'll request the speed sheet as well, but I don't have any base data to go off of for that info, just hp and tq.
I will say this. I noticed an immediate improvement in rpm's revving and acceleration. I break loose now and get the slip indicator more often then ever before. I wasn't expecting much, but this addition has changed the driving characteristics for the better While driving, I can stomp on the gas and I'm put back into my seat instantly. I'm sure I'll see some numbers to back this up, and I'll request the speed sheet as well, but I don't have any base data to go off of for that info, just hp and tq.
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Joined: Jul 2008
Posts: 119
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From: Chandler AZ
wow, sounds impressive. does it just generally feel more powerful or is it building rpms a lot quicker? Sounds like it's a night and day with the responsiveness.
who did the install and how hard was it, total time took to do it?
who did the install and how hard was it, total time took to do it?
Last edited by sredish; Aug 26, 2008 at 10:15 AM.
Well, everything is installed, but they can't dyno until Friday I will say this. I noticed an immediate improvement in rpm's revving and acceleration. I break loose now and get the slip indicator more often then ever before. I wasn't expecting much, but this addition has changed the driving characteristics for the better While driving, I can stomp on the gas and I'm put back into my seat instantly. I'm sure I'll see some numbers to back this up, and I'll request the speed sheet as well, but I don't have any base data to go off of for that info, just hp and tq.
I will say this. I noticed an immediate improvement in rpm's revving and acceleration. I break loose now and get the slip indicator more often then ever before. I wasn't expecting much, but this addition has changed the driving characteristics for the better While driving, I can stomp on the gas and I'm put back into my seat instantly. I'm sure I'll see some numbers to back this up, and I'll request the speed sheet as well, but I don't have any base data to go off of for that info, just hp and tq.
Can't wait to see some G37 dynos with the pulley. In the meantime, here's a dyno done from a Z owner (HR engine) with the crank pulley. Unfortunately, he didn't see any gains: http://my350z.com/forum/vq35hr/38144...ml#post6224647 .