Underdrive power pulleys?
Thread Starter
Safety Car
Joined: Mar 2002
Posts: 3,798
Likes: 0
From: Hattiesburg MS
Underdrive power pulleys?
Are they worth it? Who has them installed and did you get the alternator pulley too or just the main pulley? Do you think they made any difference other than a lighter wallet? Thanks in advance.
Le Mans Master
Joined: Apr 2000
Posts: 6,341
Likes: 1
From: Shelton CT
Re: Underdrive power pulleys? (mayberry)
I had mien installed about 4 years ago..
Pulleys is one of teh few things that you can 'bolt-on' that actually works..
Car revved a lto freer with them and I was able to smoke the tires lonegr too. Onyl drawback is that my alt turns slower too, although I bought the March AMP Pulley System. Durign idling the car charges about 12v. During driving about 14-14.3 (normal).
Pulleys is one of teh few things that you can 'bolt-on' that actually works..
Car revved a lto freer with them and I was able to smoke the tires lonegr too. Onyl drawback is that my alt turns slower too, although I bought the March AMP Pulley System. Durign idling the car charges about 12v. During driving about 14-14.3 (normal).
Drifting
Joined: May 2002
Posts: 1,509
Likes: 3
From: Hazel Park MI
Re: Underdrive power pulleys? (mayberry)
I posted a similar thread recently. Like other bolt ons, some say it works, others say it doesn't. I just ordered the 2 piece pulley kit from TPIS. Chris at TPIS said that I can try the stock belt, and if it is loose get one a couple inches shorter. I'm thinkin' dude tell me new belt or not!! In a thread a started months ago another member stated TPIS sent him a NAPA belt, and thank god he listed the part number. I have a feeling Chris may have steered me wrong by not offering to send me one or give a better heads up about a new belt part number. But I won't get them until Thursday next week, so I'll find out then. He didn't help me much though. I say get 'em. In some members times they post in their sigs they shave almost a tenth and a half off . Even with light or no mods, a smoother turning engine is gonna work more efficiently and rev as quick as its potential allows. And consider time, price, potential HP, why not! :cheers: :seeya
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Underdrive power pulleys? (mayberry)
Definietly get the Power & Amp set with underdrive crank and overdrive (small) alt pulley.
You WILL need a new belt. My current one is a Kelly 895K6, 89.5" long and 6 rib.
You WILL need a new belt. My current one is a Kelly 895K6, 89.5" long and 6 rib.
