Will Pulleys really increase your 1/4?
- Thread starter 94Silverbullet
- Start date
5.0 Nostalgia
10 Year Member
Yeah, you may have charging problems. People say you can just not use the underdrive alternator pulley. They will slow down all the accessories. I also would not want an underdrive pulley on my water pump. I have never even considered putting them on my car for that reason.
Some have had luck with them, others have had problems.
Some have had luck with them, others have had problems.
94Silverbullet said:
It depends on what pullies you get. I have heard the March power and amp kit these problems are a minumum. Many pullies you will see them advertised as either "street" or "race". The fact is that with the stock alternator chaging problems are there no matter what you do, do a 3G and those problems decrease. I have ASP UD's and had no problems, especailly after the 3G, but I have thier 3" crank pulley now, it doesn't charge under 1600rpm.
PhLoBuS
New Member
Michael Yount
Mustang Master
The dyno tests I've seen showed a gain of 8HP with the pulleys on one test, and 12HP with the other test. The gain increases with rpm - neither was more than 5HP until above 3500 rpm - so for most street driving you don't benefit much from them.
Some people suffer both charging issues and/or cooling issues. The underdrives also slow down the water pump and the mechanical fan. There's no way to tell if it will negatively impact yours without trying. Be careful about those that say "they worked on mine, they'll work on yours". There's simply not a one-size-fits-all when it comes to what's gonna happen when you put underdrives on. Obviously, the guy in Boondocks, Canada with the stock 5.0, no a/c, manual tranny and a brand new radiator is in a different situation than the guy in Houston, TX with auto/a-c and slugging through bumper to bumper traffic in August with a 14 year old stock radiator. You'll have to try it on yours and see. The good news is they're easy to sell used if they cause more problems than they solve.
I put the stockers back on mine to solve charging, cooling (summer with the a/c on) and power steering squealing issues.
Some people suffer both charging issues and/or cooling issues. The underdrives also slow down the water pump and the mechanical fan. There's no way to tell if it will negatively impact yours without trying. Be careful about those that say "they worked on mine, they'll work on yours". There's simply not a one-size-fits-all when it comes to what's gonna happen when you put underdrives on. Obviously, the guy in Boondocks, Canada with the stock 5.0, no a/c, manual tranny and a brand new radiator is in a different situation than the guy in Houston, TX with auto/a-c and slugging through bumper to bumper traffic in August with a 14 year old stock radiator. You'll have to try it on yours and see. The good news is they're easy to sell used if they cause more problems than they solve.
I put the stockers back on mine to solve charging, cooling (summer with the a/c on) and power steering squealing issues.
I think you'd be better off spending your money on an electric fan if you don't already have one.
Michael Yount
Mustang Master
I think the potential gain from an electric fan is similar to underdrives. However, be sure you size it correctly - undersized means you've got low speed cooling issues. And with just about any fan with enough cooling capacity, if you have the stock Fox 65A alternator, you're gonna have charging issues.
willys1
Active Member
I picked up a tenth in the 1/4.In the hot summer months,it runs alot hotter now!! And at idle it doesnt charge! With stock gears it mite be an issue,but if you have after market gears you should be fine with the charging.
Michael Yount
Mustang Master
"but if you have after market gears you should be fine with the charging."
Gears won't help at all when you're idling in traffic....
Gears won't help at all when you're idling in traffic....
dstanggt50
Founding Member
Because of the 95 coming w/the 130amp alt, charging shouldn't be a problem, at least not in my 95. I highly recommend them, as far as brand, I think they are all pretty good, I have some cheap mac pulleys.
willys1
Active Member
Very true,, if your involved with 4-5 hour traffic jams every day,then yeah,your f@cked!Michael Yount said:
Michael Yount
Mustang Master
Unfortunately, instead of 4 or 5 hours, it only takes a few minutes to overheat one if it's on the edge...
willys1
Active Member
thought we were talking chargingMichael Yount said:
Im sure most pullies are different,but mine(march) dont have any over heating problems at idle,only when I do 2500rpm,or better on the highway.Similar threads
