pulley woes

fast93gt50 · 01-10-2001, 02:14 PM

I just installed a set of march underdrive pulleys alternater , crank, and water pump.
I noticed a nice increase but my battery gauge goes almost to zero when idleing, i know it is because of the alternator pulley, but is there any way to fix it other than replacing the alternater. please help almost ready to take it off and break it

Thanx for any info or help

------------------
fast93gt50@hotmail.com
BASSANI X PIPE, CRANE IGNITION,
TAYLOR WIRES 3.73'S, MAC COLD AIR KIT, PRO 5.0 SHIFTER, MARCH UNDERDRIVE PULLEYS

Stefan · 01-10-2001, 02:17 PM

What kind of shape was your alternator in before the pulley install? If it was weak, the pulleys will only compound the problem. Now might be a good time to upgrade to a higher amp alternator.

Just my 2 cents.

------------------
66 Tahoe Turquoise Coupe
Laser Red 96GT Ragtop
Both are slow but easy on the eyes!

NO SLO PK · 01-10-2001, 02:54 PM

If you need a little increase in charging, you can install the smaller, stock alternator pulley which will spin the alternator a little faster. I've done this before and it helped. I don't remember if I had to use a shorter belt. I'd try the stock belt first.

If that doesn't work, March sells a smaller alternator pulley as part of their #2015 kit. If you can order that pulley alone, the charging will be as good as stock.

------------------
'91 LX
Procharger, 3 row intercooler, extrude honed Cobra intake, Mac full Length Headers, 30# inj., 73mm C&L, 75mm tb, E303 cam, 289 rods, ported E7 heads, MSD, T-Rex w/255 lph Walbro, 5 lug conversion, Cobra R wheels, 3.27 gears and Moser Axles.

[This message has been edited by NO SLO PK (edited 01-10-2001).]

fastang · 01-10-2001, 04:30 PM

I am using the march pulleys and I have not had any trouble whatsoever. Sorry to hear that.

------------------
95GT B303 cam, 1.7 rockers, 65mm TB, 73mm MAF, milled heads, K&N, off road pipes, ADS chip, pulleys, msd coil,9mm wires, Tremec 3550, Pro5.0 shifter,10.5 Motorsport clutch, weld in subframe connectors

Kevin Price · 01-10-2001, 05:35 PM

Moved to Windsor Power

------------------
SVO siamesed 351 stroked to 417ci,Yates heads, solid roller,Trans King glide and a little blue bottle
of giggle gas. My Car

Rev · 01-13-2001, 02:00 AM

Make sure the belt is tensioned correctly before changing the pulley. I've had low charging before from inadequate belt tension.

Rev

------------------
'66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph
1/4 mi.

90dpscoupe · 01-13-2001, 02:28 AM

faststang, you also have a 95? a better alternator correct?

01-10-2001, 02:14 PM	#1
fast93gt50 Registered Member Join Date: Oct 2000 Location: St.charles Posts: 11	pulley woes I just installed a set of march underdrive pulleys alternater , crank, and water pump. I noticed a nice increase but my battery gauge goes almost to zero when idleing, i know it is because of the alternator pulley, but is there any way to fix it other than replacing the alternater. please help almost ready to take it off and break it Thanx for any info or help ------------------ fast93gt50@hotmail.com BASSANI X PIPE, CRANE IGNITION, TAYLOR WIRES 3.73'S, MAC COLD AIR KIT, PRO 5.0 SHIFTER, MARCH UNDERDRIVE PULLEYS

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01-10-2001, 02:17 PM	#2
Stefan Registered Member Join Date: Dec 1998 Location: Manhattan, KS 66502 Posts: 599	What kind of shape was your alternator in before the pulley install? If it was weak, the pulleys will only compound the problem. Now might be a good time to upgrade to a higher amp alternator. Just my 2 cents. ------------------ 66 Tahoe Turquoise Coupe Laser Red 96GT Ragtop Both are slow but easy on the eyes!

01-10-2001, 02:54 PM	#3
NO SLO PK Registered Member Join Date: Mar 1999 Location: Arcadia, CA, USA Posts: 731	If you need a little increase in charging, you can install the smaller, stock alternator pulley which will spin the alternator a little faster. I've done this before and it helped. I don't remember if I had to use a shorter belt. I'd try the stock belt first. If that doesn't work, March sells a smaller alternator pulley as part of their #2015 kit. If you can order that pulley alone, the charging will be as good as stock. ------------------ '91 LX Procharger, 3 row intercooler, extrude honed Cobra intake, Mac full Length Headers, 30# inj., 73mm C&L, 75mm tb, E303 cam, 289 rods, ported E7 heads, MSD, T-Rex w/255 lph Walbro, 5 lug conversion, Cobra R wheels, 3.27 gears and Moser Axles. [This message has been edited by NO SLO PK (edited 01-10-2001).]

01-10-2001, 04:30 PM	#4
fastang Registered Member Join Date: Aug 2000 Location: santa ana ca Posts: 1,349	I am using the march pulleys and I have not had any trouble whatsoever. Sorry to hear that. ------------------ 95GT B303 cam, 1.7 rockers, 65mm TB, 73mm MAF, milled heads, K&N, off road pipes, ADS chip, pulleys, msd coil,9mm wires, Tremec 3550, Pro5.0 shifter,10.5 Motorsport clutch, weld in subframe connectors

01-10-2001, 05:35 PM	#5
Kevin Price Registered Member Join Date: Jan 1999 Location: Oxford, KS Posts: 935	Moved to Windsor Power ------------------ SVO siamesed 351 stroked to 417ci,Yates heads, solid roller,Trans King glide and a little blue bottle of giggle gas. My Car

01-13-2001, 02:00 AM	#6
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Make sure the belt is tensioned correctly before changing the pulley. I've had low charging before from inadequate belt tension. Rev ------------------ '66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph 1/4 mi.

01-13-2001, 02:28 AM	#7
90dpscoupe Registered Member Join Date: Jun 2000 Location: sanantonio, Tx, usa Posts: 1,407	faststang, you also have a 95? a better alternator correct?