Welcome to the North American Subaru Impreza Owners Club Sunday September 21, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Reviews > Car Part Reviews

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 05-24-2002, 05:30 PM   #1
nhluhr
John Wayne Toilet Paper
Moderator
Member Sales Rating: (22)
 
Member#: 7327
Join Date: Jun 2001
Chapter/Region: NWIC
Location: Seattle, WA
Vehicle:
2008 Mazdaspeed3
2006 Wrangler Sport

Thumbs up Vishnu underdrive pulley

I've had the Vishnu underdrive pulley for a little over 5 months now and I must say that I truly think it's a good mod. I know at this point I've gotten used to it, but it definitely changed the feel of the car when I first started using it. The shifting was smoother, mostly. Acceleration wasn't really noticeable, but I suppose it could make a difference. Anyway, no problems whatsoever to report. It's holding up just fine, still looking great, and not causing any problems.

-Nick
* Registered users of the site do not see these ads.
nhluhr is offline   Reply With Quote
Old 05-26-2002, 05:08 PM   #2
Subi-fied
*** Banned ***
Member Sales Rating: (0)
 
Member#: 13483
Join Date: Dec 2001
Default Re: Vishnu underdrive pulley

Quote:
Originally posted by nhluhr
I've had the Vishnu underdrive pulley for a little over 5 months now and I must say that I truly think it's a good mod. I know at this point I've gotten used to it, but it definitely changed the feel of the car when I first started using it. The shifting was smoother, mostly. Acceleration wasn't really noticeable, but I suppose it could make a difference. Anyway, no problems whatsoever to report. It's holding up just fine, still looking great, and not causing any problems.

-Nick
Thanks for the info Nick. I have a question though...

Is your AC as cold as it was with the stock pulley?

Thanks man

-Subi
Subi-fied is offline   Reply With Quote
Old 06-04-2002, 08:54 AM   #3
nhluhr
John Wayne Toilet Paper
Moderator
Member Sales Rating: (22)
 
Member#: 7327
Join Date: Jun 2001
Chapter/Region: NWIC
Location: Seattle, WA
Vehicle:
2008 Mazdaspeed3
2006 Wrangler Sport

Default

I put the underdrive pulley in during the winter so I had never really thought about that before.

I'll say that in the recent 90+ degree days I've been using A/C again and it doesn't seem to be lacking. The compressor kicks in and out depending on how much it is needed so I suppose this would just make it work a little longer since it's not compressing as much.
nhluhr is offline   Reply With Quote
Old 06-04-2002, 05:52 PM   #4
Julio
Scooby Specialist
Member Sales Rating: (0)
 
Member#: 6363
Join Date: May 2001
Location: Gossip Island
Vehicle:
10 Sec. Club
Element - Crawford

Default

Subi-fied: Im pretty sure Im "qualified" to answer your question, since I live in the Caribbean

I do feel an improvement in the lower rpm range. After 4500rmps it's like it's not there though... A/C works perfect, no amp draw.

P.S - I installed Vishnu up-pipe and Pulley at the same time. (Stock exhaust) - And had no Unichip then....
Julio is offline   Reply With Quote
Old 06-04-2002, 06:47 PM   #5
rak328
Scooby Specialist
Member Sales Rating: (0)
 
Member#: 3858
Join Date: Jan 2001
Location: Atlanta, GA
Default

I was looking into getting the Vishnu pulley. How difficult is the install, I heard getting the belts on is a pita.
rak328 is offline   Reply With Quote
Old 06-05-2002, 09:03 AM   #6
Julio
Scooby Specialist
Member Sales Rating: (0)
 
Member#: 6363
Join Date: May 2001
Location: Gossip Island
Vehicle:
10 Sec. Club
Element - Crawford

Default

Yes, it was a pita to install the belts.
Julio is offline   Reply With Quote
Old 06-05-2002, 10:18 AM   #7
gossamer_monster
Scooby Specialist
Member Sales Rating: (0)
 
Member#: 3574
Join Date: Jan 2001
Chapter/Region: NESIC
Vehicle:
2002 WRX
Blase' Yellow----R.I.P.

Default

Quote:
Originally posted by Julio
Yes, it was a pita to install the belts.
I didn`t have any problems with mine. You put them on like a bicycle chain. Put it half way on and turn the pullies. Pulls itself right on. That part of the install literally took 2 minutes.

Bill
gossamer_monster is offline   Reply With Quote
Old 06-05-2002, 11:15 AM   #8
Julio
Scooby Specialist
Member Sales Rating: (0)
 
Member#: 6363
Join Date: May 2001
Location: Gossip Island
Vehicle:
10 Sec. Club
Element - Crawford

Default

As many other parts...every car is different...the belts that came with my Vishnu pulley were not that easy to install. I tried that way and it took me more than 5 minutes to put them on. (With 4 people trying)
Julio is offline   Reply With Quote
Old 06-11-2002, 03:48 PM   #9
S-1
Scooby Specialist
Member Sales Rating: (2)
 
Member#: 10842
Join Date: Oct 2001
Chapter/Region: MAIC
Location: NOVA
Vehicle:
07 2.5i Wagon
Black

Default

Had mine on for a little over a month. Install took about 1 hour (20 minutes trying to one of the belts on) This was taking our time btw. Like mentioned earlier, improvement was definately felt at the lower rpms (2200-3000) Power delvery just feels plain smoother after this install!
S-1 is offline   Reply With Quote
Old 06-15-2002, 12:13 AM   #10
Dayf
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 14348
Join Date: Jan 2002
Chapter/Region: SCIC
Location: Simi Valley, Ca.
Vehicle:
06 Evo MR
Graphite Grey

Default

I've had my U.D. pulley for a few months now and I've had no complaints. The low end was where the power was most noticable.. especially on just normal driving. The A/C still works fine(About as good as 4 cylinder A/C can get). The engine still feels fine on idle.. (Ok about as smooth as a boxer 4 can get)
Dayf is offline   Reply With Quote
Old 06-17-2002, 09:08 AM   #11
nhluhr
John Wayne Toilet Paper
Moderator
Member Sales Rating: (22)
 
Member#: 7327
Join Date: Jun 2001
Chapter/Region: NWIC
Location: Seattle, WA
Vehicle:
2008 Mazdaspeed3
2006 Wrangler Sport

Default

That's how you put a bicycle chain on if you don't have the right tools to do it correctly.

If you roll the pullies to put it on, be very careful not to damage the belt.

-Nick

Quote:
Originally posted by gossamer_monster


I didn`t have any problems with mine. You put them on like a bicycle chain. Put it half way on and turn the pullies. Pulls itself right on. That part of the install literally took 2 minutes.

Bill
nhluhr is offline   Reply With Quote
Old 06-21-2002, 02:42 PM   #12
Penguinking
Scooby Specialist
Member Sales Rating: (0)
 
Member#: 9422
Join Date: Aug 2001
Location: Atlanta, GA
Vehicle:
2002 silver
wrx R.I.P.

Default

it took me a few tries to roll the belt on cause i was being really cautious about it

biggest PITA for me was that damn bolt that holds the pulley down. damn near dislocated my arm from pulling so hard to loosen it maybe im just really weak or something
Penguinking is offline   Reply With Quote
Old 06-25-2002, 09:01 AM   #13
nhluhr
John Wayne Toilet Paper
Moderator
Member Sales Rating: (22)
 
Member#: 7327
Join Date: Jun 2001
Chapter/Region: NWIC
Location: Seattle, WA
Vehicle:
2008 Mazdaspeed3
2006 Wrangler Sport

Default

after a friend of mine busted his AC Belt Tensioner, i must issue a word of caution:

Don't start turning the tensioner adjustment bolt until you have release the tensioner fixing bolt! If you don't heed my warning, you'll crack the plastic piece and you'll have no AC.
nhluhr is offline   Reply With Quote
Old 06-26-2002, 09:58 AM   #14
rak328
Scooby Specialist
Member Sales Rating: (0)
 
Member#: 3858
Join Date: Jan 2001
Location: Atlanta, GA
Default

Quote:
Originally posted by nhluhr
after a friend of mine busted his AC Belt Tensioner, i must issue a word of caution:

Don't start turning the tensioner adjustment bolt until you have release the tensioner fixing bolt! If you don't heed my warning, you'll crack the plastic piece and you'll have no AC.
Nick - I am installing mine this weekend and is there anything else I should watch out for?
rak328 is offline   Reply With Quote
Old 07-07-2002, 02:54 AM   #15
eric m.
Scooby Specialist
Member Sales Rating: (0)
 
Member#: 14872
Join Date: Jan 2002
Chapter/Region: SCIC
Location: kalispell, mt
Vehicle:
06 legacy GT black
accessport stage II.

Default

Quote:
Originally posted by Julio
Yes, it was a pita to install the belts.
no, it is not a PITA. the uppipe is a PITA, but that is a different story. just make sure and follow the instructions for the pulley, which tell you which screws to loosen. if you don't get them all, it will be almost impossible.

oh...i almost forgot...get a big breaker bar to loosen the pulley nut. that will help so much. and be prepared to wiggle the pulley for a few minutes to get it off. not that hard. it's a good mod. you will notice a difference.
eric m. is offline   Reply With Quote
Old 07-07-2002, 03:15 AM   #16
Penguinking
Scooby Specialist
Member Sales Rating: (0)
 
Member#: 9422
Join Date: Aug 2001
Location: Atlanta, GA
Vehicle:
2002 silver
wrx R.I.P.

Default

Quote:
Originally posted by eric m.



oh...i almost forgot...get a big breaker bar to loosen the pulley nut. that will help so much. and be prepared to wiggle the pulley for a few minutes to get it off. not that hard. it's a good mod. you will notice a difference.
yeah, that was a major barrier to my pulley install lol
took me an hr of grunting and sweating and overstressing my arm muscles to realize taht i needed a bigger breaker bar to get the damn thing loose
Penguinking is offline   Reply With Quote
Old 07-09-2002, 12:34 AM   #17
eric m.
Scooby Specialist
Member Sales Rating: (0)
 
Member#: 14872
Join Date: Jan 2002
Chapter/Region: SCIC
Location: kalispell, mt
Vehicle:
06 legacy GT black
accessport stage II.

Default

i got a 3 foot long pipe from home depot for a few bucks. make sure it's large enough to fit over the end of your 3/4" rachet. a 1" pipe is perfect. don't overuse the breakerbar like for tightening and stuff, or you could get into trouble. but for really hard to loosen stuff, it's perfect. make sure to put the car into gear when loosening the nut, or the pulley will just turn forever.
eric m. is offline   Reply With Quote
Old 07-09-2002, 12:44 AM   #18
Penguinking
Scooby Specialist
Member Sales Rating: (0)
 
Member#: 9422
Join Date: Aug 2001
Location: Atlanta, GA
Vehicle:
2002 silver
wrx R.I.P.

Default

Quote:
Originally posted by eric m.
make sure to put the car into gear when loosening the nut, or the pulley will just turn forever.
i forgot about that on my first attempt and i just kept turning the thing for like 10 min! lol
Penguinking is offline   Reply With Quote
Old 08-20-2002, 02:39 AM   #19
Yasin
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 21877
Join Date: Jul 2002
Location: Just north of Seattle
Default

what does an underdrive pulley do? i do not mind threatening my AC.

Y
Yasin is offline   Reply With Quote
Old 08-20-2002, 10:38 PM   #20
nhluhr
John Wayne Toilet Paper
Moderator
Member Sales Rating: (22)
 
Member#: 7327
Join Date: Jun 2001
Chapter/Region: NWIC
Location: Seattle, WA
Vehicle:
2008 Mazdaspeed3
2006 Wrangler Sport

Default

Quote:
Originally posted by Yasin
what does an underdrive pulley do? i do not mind threatening my AC.

Y
The underdrive pulley basically makes the engine accessories (AC, power steering, alternator) turn a little slower than stock so that they take less power... the effect of this is releasing that power to the wheels... the effect is definitely true!

The other thing that most underdrive pulleys do is shave a lot of rotating weight off the engine (the stock pulley is several pounds heavier than the vishnu pulley) so it takes less torque to accelerate it... the effect is similar (but not as dramatic) as lightweight flywheels - you can revmatch a little quicker, there's less jarring when engaging gears, etc..

It's a nice improvement over stock and now that I've had mine for probably 15,000 miles, I must say that it's one of the best no-trouble mods I've done.

The threat to the AC is just in not loosening the bolts that hold the belts tight before you start adjusting them... it'll just break a plastic fitting which means you won't have AC until you get the plastic fitting replaced (because the belt won't drive the AC unless it's tight)
nhluhr is offline   Reply With Quote
Old 08-21-2002, 11:03 PM   #21
Mighty Mouse
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 14895
Join Date: Feb 2002
Location: Ft.lauderdale
Vehicle:
94 400hpSRT Black
350z Bricklay Red

Default

Not sure if you have a blitz TT or not but those are able to show you what voltage yoru kicking out. I know when i installed my UP on my supra that the V would drop close to 12v at times when idling and the air etc on.

This is due to your alternator not being driven as fast.
Mighty Mouse is offline   Reply With Quote
Old 08-27-2002, 08:47 PM   #22
Dayf
Scooby Newbie
Member Sales Rating: (0)
 
Member#: 14348
Join Date: Jan 2002
Chapter/Region: SCIC
Location: Simi Valley, Ca.
Vehicle:
06 Evo MR
Graphite Grey

Default

If I remember correctly from Shiv.. The Vishnu pulley only underdrives by about 15% from stock. The diameter is still there, but what gives you more power is mostly from the weight reduction. At night idling with the a/c on, stereo.. and every light you can imagine.. I havent had any trouble for about 6 months now.
Dayf is offline   Reply With Quote
Old 08-28-2002, 12:01 AM   #23
Penguinking
Scooby Specialist
Member Sales Rating: (0)
 
Member#: 9422
Join Date: Aug 2001
Location: Atlanta, GA
Vehicle:
2002 silver
wrx R.I.P.

Default

huh....the diameter of the pulley is definetly smaller than stock
Penguinking is offline   Reply With Quote
Old 01-21-2003, 05:32 PM   #24
wrxracer
Scooby Specialist
Member Sales Rating: (0)
 
Member#: 5275
Join Date: Mar 2001
Location: corpus christi texas U.S.
Vehicle:
2002 impreza WRX
WR BLUE

Talking vishnu pulley....

well guys sorry to say i had more trouble than most..for what ever reason the belt would not roll on the pullies for me. me and my brother tried for all most an hour just to get the alt/pwr steering belt on but to no avail...had to go too the local parts store and get one 1/2 in longer to make it work.. we tried rolling, prying it"OUCH" and such but still did not have enough play to get it on there... after words though i must say, in the lower rpm's its better, the cars power is smoother and i don't have to run on it to make it go. so far so good, A/C and lights today worked great..can't tell the difference at all....

Last edited by wrxracer; 02-03-2003 at 09:44 PM.
wrxracer is offline   Reply With Quote
Old 01-22-2003, 06:11 AM   #25
Impreza2fast
Scooby Newbie
Member Sales Rating: (9)
 
Member#: 14088
Join Date: Jan 2002
Chapter/Region: SCIC
Location: West Covina CA
Vehicle:
2002 WRX
silver

Default had my install today

I got my pulley just the other day and today my friend help me installed it in about 20 mins or so or maybe a bit more, honestly didn't have any problem at all, everything was fine. After the we put it on, i took my car on a few run and i really felt the differences in the power and the engine just felt that much more smoother. This is good mod, wish i would have done it sooner.

joe
Impreza2fast is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
is the vivid and vishnu underdrive pulley the same? lstepnio Factory 2.0L Turbo Powertrain 4 08-06-2002 01:14 PM
Vishnu Underdrive Pulley ? desertwagon Factory 2.0L Turbo Powertrain 13 03-05-2002 08:37 PM
selling my vishnu underdrive pulley jmott Texas Impreza Club Forum -- TXIC 1 02-22-2002 06:47 PM
installed vishnu underdrive pulley last night jmott Texas Impreza Club Forum -- TXIC 13 12-20-2001 01:49 PM
Vishnu Underdrive Pulley phred Mid West Subaru Owners Club Forum -- MWSOC 5 11-26-2001 11:04 AM


All times are GMT -4. The time now is 07:17 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.