Crank pulley: Unorthodox vs RVM
Thread Starter
Joined: Dec 2000
Posts: 2,403
From: Ontario, Canada
Crank pulley: Unorthodox vs RVM
I read each and every post regarding underdrive pulleys here. What I got out if it was that the RVM pulley is 1.7 lbs and the Unorthodox is 1.56 lbs. Other than that however, has anyone had a chance to compare the 2 pulleys? How is the quality of the RVM? Are there any dyno numbers for the RVM vs the Unorthodox? I guess you'd have to compare using 2 similar cars to see if the gains match up for both pulleys.
Lastly, are the belts the same for both pulleys? This is what I have gathered for the UR pulley:
Alternator & Water Pump
1995-02 Gates # K060408
Power Steering
1995-02 Gates # K040292
If this one does not fit then try: Gates # K040300
I'd appreciate it if anyone could post their findings on this.
Thanks!
Lastly, are the belts the same for both pulleys? This is what I have gathered for the UR pulley:
Alternator & Water Pump
1995-02 Gates # K060408
Power Steering
1995-02 Gates # K040292
If this one does not fit then try: Gates # K040300
I'd appreciate it if anyone could post their findings on this.
Thanks!
Senior Member
Joined: Jul 2001
Posts: 7,530
Re: Crank pulley: Unorthodox vs RVM
Originally posted by speedemn
I read each and every post regarding underdrive pulleys here. What I got out if it was that the RVM pulley is 1.7 lbs and the Unorthodox is 1.56 lbs. Other than that however, has anyone had a chance to compare the 2 pulleys? How is the quality of the RVM? Are there any dyno numbers for the RVM vs the Unorthodox? I guess you'd have to compare using 2 similar cars to see if the gains match up for both pulleys.
Lastly, are the belts the same for both pulleys? This is what I have gathered for the UR pulley:
Alternator & Water Pump
1995-02 Gates # K060408
Power Steering
1995-02 Gates # K040292
If this one does not fit then try: Gates # K040300
I'd appreciate it if anyone could post their findings on this.
Thanks!
I read each and every post regarding underdrive pulleys here. What I got out if it was that the RVM pulley is 1.7 lbs and the Unorthodox is 1.56 lbs. Other than that however, has anyone had a chance to compare the 2 pulleys? How is the quality of the RVM? Are there any dyno numbers for the RVM vs the Unorthodox? I guess you'd have to compare using 2 similar cars to see if the gains match up for both pulleys.
Lastly, are the belts the same for both pulleys? This is what I have gathered for the UR pulley:
Alternator & Water Pump
1995-02 Gates # K060408
Power Steering
1995-02 Gates # K040292
If this one does not fit then try: Gates # K040300
I'd appreciate it if anyone could post their findings on this.
Thanks!
SuDZ
Thread Starter
Joined: Dec 2000
Posts: 2,403
From: Ontario, Canada
Is the diameter of the RVM pulley the same as UR?
RVM's site said that their pulley is BIGGER diameter than stock, but much lighter in weight. Is that true? I thought that the UR and RVM pulleys were both smaller in diameter than stock.
RVM's site said that their pulley is BIGGER diameter than stock, but much lighter in weight. Is that true? I thought that the UR and RVM pulleys were both smaller in diameter than stock.
Handsome
Joined: Sep 2002
Posts: 2,074
I'm about to change my belts, and am going ahead and getting a lighter UDP probably from unorthodox. Anyone know of the best place to buy one? I did a search but prices are constantly changing, I was wondering what the newest best place to buy one is?
Handsome
Joined: Sep 2002
Posts: 2,074
Originally posted by JeffesonM
just out of curiousity, why would you pay twice as much for Unorthodox Racing brand vs. RVM?
just out of curiousity, why would you pay twice as much for Unorthodox Racing brand vs. RVM?
I didn't know that there was a significant difference in price. I will get the RVM.
The Unorthodox weighs 1.56, the RVM 1.7, what's the stock pulley's weight
Originally posted by dwapenyi
In order to drive the accessory belts at a slower rpm, they would both have to be bigger than stock. A smaller pulley would drive the accessories faster, and put more load on the engine.
DW
In order to drive the accessory belts at a slower rpm, they would both have to be bigger than stock. A smaller pulley would drive the accessories faster, and put more load on the engine.
DW
Oops, my bad 
Brain fart.
DW
Brain fart.DW
Originally posted by Jime
If its an underdrive pulley it has to be smaller. A larger pulley would make it drive faster not slower. Larger on the alternator or power steering would make it drive slower but not the drive pulley.
If its an underdrive pulley it has to be smaller. A larger pulley would make it drive faster not slower. Larger on the alternator or power steering would make it drive slower but not the drive pulley.
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