ZZ Performance Underdrive Pulleys for the 3.8 ??

[mike24]

Has ne body here used these pulleys (water pump,and altinator pulleys) for our cars yet??
They said it would work for our cars but i wanna make sure??
Thanks
Mike

[JML97-3.8]

I was wondering if those would work myself. Did you call and ask?

[Andy H]

I've heard that the 3.8 didn't need under drive pulleys. The stock ones basically are under drive puleys. I might be wrong though

[bluecmaro96]

Yeah and you heard that on one of these boards most likely by someone who didnt even use the pulleys, i have seen so many mods that aredone to peoples cars now that made a nic difference that just 6 months -1 year ago people would say oh that is worthless.

[12secondv6]

I personally don't know anyone who has tried them.
I was not aware they were available.
I thought there was testing done w/ pullies and bigger throttle body and power gain was maybe 1 rwhp?
I don't remember the name of the company but we are talking about a long time ago.
How much?
I'll have to take a look.
go for it and tell us how it is
http://www.zzperformance.com/zzp/pro...ive_pulley.htm

[ July 01, 2002: Message edited by: 12secondv6 ]</p>

[W68Firebird97]

Oh BTW it was me who posted this topic originally.
NE way the pulleys are 59 bux clear or black. I Emailed the company and they said that it will fit our cars and he also said the has altinator pulleys which are 5% overdrive,10% underdrive,and 20% underdrive. Hey ne thing to free up just a little HP :D
Ill order them in the next week or so.

[bluecmaro96]

Will these work if your a/c is taken out? Does the a/c pulley and that have to be on to use these underdrive pulleys?

[daWhoady]

<blockquote>quote:</font><hr> Originally posted by bluecmaro96:
Will these work if your a/c is taken out? Does the a/c pulley and that have to be on to use these underdrive pulleys? <hr></blockquote>

um.....no. Just don't use the a/c pulley and use the rest.

[wannabfast]

I have the 3.4L but I just put them on last week and now I'm a little worried about my motor temp, it's runnin' about 20-30 degs hotter and that can't be good.when I'm on the highway it's no promblem but traffic is bad.

[Dominic]

I wouldn't want to lower the flowrate of my water pump, the car runs hot enough as it is.

And as for the alternator, we definetly don't need to slow it down, the damned thing isn't very powerful to begin with!

I don't see the point in slowing down any of the accessories unless I can gain more than 5rwhp from doing so, and I doubt that will happen.

[bluecmaro96]

How do you honestly know what kind of power gains are there from underdrive pulleys? did you see a dyno graph?

[Arctc Wolf]

If you want to free up some hp and be able to power everything, just get a higher output alternator before you get the pulleys.

[Deuce Bigs]

think his name was brian and he had a 96 RS with every bolt-on available. ram air technologies made a prototype underdrive pulley for his car and from the dyno runs the most he gained was 1rwhp. this was a couple years ago(circa 99) so who knows circle technology may have improved over the last few years?

someone else can try it. remember grand prix gtp's have a supercharger pulley spinnin too so that may account for some of the increase.

[Backfire]

<blockquote>quote:</font><hr> If you want to free up some hp and be able to power everything, just get a higher output alternator before you get the pulleys. <hr></blockquote>

Just remember that a high output alternator is probably going to require more power to turn it, so you lose some of the gains from the pulleys. I don't know much about alternator efficiency differences, so a high output may be more efficient wich would mean less work input to get the same output, but in general, you have to put more in to get more out.

[Ttop34]

Maybe a few people that have been on the boards for a while will remember a guy dynoing his car with no belt at all. Not sure how this is even possible but he only picked up like 1hp or so. Somebody else might remember the details about this better than I do.