Underdrive Pulley Question
Thread Starter
Le Mans Master
Joined: Aug 2000
Posts: 6,273
Likes: 14
From: Austin TX
Underdrive Pulley Question
I'm converting the L-98 in my 71 to serpentine and will be replacing all the v groove pulleys with serp pulleys. Is there a significant advantage to underdrive pulleys such as those sold by March? Most of my driving is in town in the 2000 to 4000 rpm range.
Drifting
Joined: May 2002
Posts: 1,509
Likes: 3
From: Hazel Park MI
Re: Underdrive Pulley Question (flynhi)
I bought the crank/alt pulley set from TPIS for my '85 L-98. They are March pulleys, and I've had no trouble with them. I can only compare them to stock, and they improved low end throttle response in comparison. With all the beef you've got going, I'm not sure if they will help any or just serve the normal application. :seeya :cheers:
Race Director
Joined: Aug 2002
Posts: 13,356
Likes: 0
From: tucson AZ
St. Jude Donor '04 & '05
Re: Underdrive Pulley Question (flynhi)
I use the 3 pc. pulley system from March.....only problem was voltage drop charging from the alt., had to get a different pulley from March.....
Now the system works great with no drop in voltage when using accessories or ideling. Also getting the right lenth belt was a small hassle....worth it though...
Happy with the system, and even looks great.....
tony
:steering:
[Modified by oldace84, 11:24 AM 1/10/2003]
[Modified by oldace84, 11:26 AM 1/10/2003]
Now the system works great with no drop in voltage when using accessories or ideling. Also getting the right lenth belt was a small hassle....worth it though...
Happy with the system, and even looks great.....
tony
:steering:
[Modified by oldace84, 11:24 AM 1/10/2003]
[Modified by oldace84, 11:26 AM 1/10/2003]
Pro
Joined: Jan 2003
Posts: 567
Likes: 0
From: Oswego Illinois
Re: Underdrive Pulley Question (GusBustamanteJr)
You will always get that voltage drop. But it shouldn't cause any problems the only thing that will happen is the headlights will dim a little. If you dont have a high output sound system there should be no prblem.
Happy modding! :cheers:
Happy modding! :cheers:
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Underdrive Pulley Question (flynhi)
Unless you have a very high output alt, get the March Power & Amp pulley series. It has an underdrive crank pulley and an overdrive alt pulley to maintain stock alt speeds.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
Safety Car
Joined: Apr 1999
Posts: 4,623
Likes: 2
From: Ohio
Re: Underdrive Pulley Question (flynhi)
I had a two piece pully set on my '91 B4C Camaro. Affected my voltage bigtime, as well as my low speed power steering. I ended up just running the crank pulley. Didn't notice any drop in power. Still ran a high 13.
