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March Under Pulley

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Old Mar 31, 2006 | 06:21 PM
  #1  
Don 79 TA's Avatar
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From: Long Island NY
Car: Hers: 88 Formula 350
Engine: TPI
Transmission: Auto
Axle/Gears: 10 bolt Posi
March Under Pulley

anyone using the power and amp series kit from march?
4400 part number?

just wondering how it is for daily use, any cooling issues?
did you feel the gain, etc?

Last edited by Don 79 TA; Mar 31, 2006 at 06:30 PM.
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Old Apr 1, 2006 | 06:43 AM
  #2  
Hawk92z-TDZ's Avatar
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From: Arthur, Ontario, Canada
Car: 92Z28, 99SS, 83Z28 & 86GTA
Engine: 421, LS1, 327Turbo & 383
Transmission: T-56, 4L60E, T5 & 4L60
Axle/Gears: 4:10, 3:42, 2:73 & 3:27
I am running the 4410 set and sofar so good, I'll know more by the end of summer.
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Old Apr 1, 2006 | 08:17 AM
  #3  
techno101's Avatar
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Joined: Sep 2004
Posts: 502
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From: Leesville, LA
Car: 1989 Camaro RS
Engine: Modified 350 TPI
Transmission: Modified 700 R4
Axle/Gears: Posi 3.42
I have an L03 305 TBI with the March Underdrive pulleys (crank, and ALT. pulleys). I noticed a difference shifting into second gear. Nothing huge, but enough to say there worth it. It did not effect the idle much, but my lights will dim slightly at a red light, and the vents blow a little softer while at idle also.
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Old Apr 1, 2006 | 12:47 PM
  #4  
MdFormula350's Avatar
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Joined: Nov 2001
Posts: 11,634
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From: Maryland; USA
4400 Power & Amp, 2-piece, Gloss Black Steel

I have them, i did a tranny rebuild and smaller diameter torque converter.

the car runs the same temp as before as far as i can tell.

the voltage is slighty above 13 volts, so its charging nicely.

power steering feels pretty good as well.


Very happy with the set. Last night i had the headlights, fog lights, cd player, and fan all on, and it took it like a champ.

also not sure if its due to the smaller torque converter, but the car starts even quicker and faster, meaning the starter seems to be turning over fast. most likely do to both things. less drag on the belt, and less roational weight to spin as well.

not sure what alternator i have but its not the factory stock one, it fits just like factory though. probably from one from advance auto, its 5 years old and still going.

i wanted to test it after putting on the new pulley, so i took it to advance auto and it was defintely charging, but not to full spec; which isnt a problem since the crank pulley matches it with it back on the car.

Last edited by MdFormula350; Apr 1, 2006 at 12:50 PM.
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Old Apr 1, 2006 | 04:11 PM
  #5  
Vader's Avatar
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Dummass. MARCH is over. You need APRIL underdrives now. Jeesh! Where do all these guys come from?
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