Does anyone have one?
Do you notice any gains?
Any negative side effects?

How long does it take to install?
How much would a dealer charge to install as opposed to an independent shop?

Thanks for the replies...

 

yes no and no .......man i would def. not take to a dealer theyll say welp lets see here 3 hours to pull off the bolt , added hour to put the belt on..... , its actually real easy to put on , i would take it to a shop .prob only an hour of labor if that or find out here ...see if there is d.i.y. area because im sure its not bad at all ...of course i had my friend do mine but he said it was easy

 

You can rent the tools to do it from autozone or another similar auto parts shop. I've been thinking about adding one myself, but it is near the bottom of a long list of mods which include headers, fastman TB, and exhaust before the pulley. They aren't really bad to install, I believe if you do a search you can find a few people's impressions of the installation.

 

Here's a really interesting article on the subject.

http://www.dinancars.com/bmw/technia...armonic-damper

 

well that just changed my mind on a pulley system. thats for the good link!!

 

Yes, I agree you should not remove a harmonic damper and replace it with something else. But just replacing a pulley with a smaller pulley shouldn't be a problem. On the Hemi is the crank pulley part of the damper?

I spend time on a Chrysler LH forum (300M/LHS/Dodge Intrepid) and the ASP underdrive pulley is a popular mod with those guys, although it's a PITA to install on those cars. With the underdrive pulley there is no noticeable loss of alternator charging or AC performance, but the fuel economy improves slightly and it seems to accelerate better.

 

Really informative article, thanks for the info.
I think that with the ASP pulley, it only replaces the crank pulley. I believe thats with the 4.7L and the 5.7L. Is the crank pulley part of the harmonic balancer?
NO gains whatsoever? Nothing on the butt dino, I am shocked. They "advertise" 8+ hp and 21+ ft. pounds of torque... Not even a little differance, what a bummer...

 

I think the ASP pulleys come with a harmonic balancer and if you are concerned about charging MSD has an overdrive pulley that can be installed to fix that issue if it comes up.

 

The ASp site says that for the 4.7l it is the pulley and harmonic balancer.