under drive pulley install

Oh crap dude...stay away from any hammers. I remember this is how the downward spiral started for me.....
 
i dont have to worry about the smog stuff, mine is all gone!! the only thing in front of my pulleys, is the electric fan, :q:q:q:q emmisions!
 
evf4720 said:
anybody have charging issues with underdrive pullys? i never got them because i didnt think the gain would be worth wasting a few alternators.
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when i put the underdrives on i also upgraded the alternator to 200amp version. i havenet had any issues yet(i dont drive it much due to the company car) however at idle the interior lights do dim, until you get above 800-1200 rpm.
 
i have no issues with my stock alt what so ever, i did however install the pulley that was supplied from march with the set, so i have the crank, water pump and alt pulleys all on and dont have dim lights or any charging issues.
 
blacklsc1 said:
when i put the underdrives on i also upgraded the alternator to 200amp version. i havenet had any issues yet(i dont drive it much due to the company car) however at idle the interior lights do dim, until you get above 800-1200 rpm.
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Yeah but what brand do you have?

The only ones that are you should use on our cars are non-piggyback pulleys. The only ones I know of for our cars are the March Deluxe 1175 and the Steeda Underdrive Pulleys...all others are piggyback (at least that I'm aware of).

Also as mentioned in other forums (this is what I read so I don't know the accuracy) our engine are prone to damage to the oil pump gear. Supposedly it is hyper-sensitive to vibrations and can pop the engine. The Steeda people say is lighter than the stock pulley and gives more vibrations than the stock one, the March is heavier but is less vibrations than stock.

This is what they asserted in the other forum I was reading last night (SVTP forums and also Mach 1 registry). Make sure if you do take the plunge you do immense research before you purchase anything.
 
I have low voltage with my underdrives, but I have a stereo and aftermarket hid kit. Its usually if it sits idling for a while. The meter drops sometimes to 10.0, but no lights dim. I usually just give it a little gas and it goes right back to 13 or 14. I also have an optima battery, 2 12 inch subs, 2 500 watt amps, and 2 1.0 farad caps.
 
philly0420 said:
I have low voltage with my underdrives, but I have a stereo and aftermarket hid kit. Its usually if it sits idling for a while. The meter drops sometimes to 10.0, but no lights dim. I usually just give it a little gas and it goes right back to 13 or 14. I also have an optima battery, 2 12 inch subs, 2 500 watt amps, and 2 1.0 farad caps.
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What type/brand of pulleys?
 
i have aftermarket hid's also, and i may have a problem with the stereo once its all installed, that monster kicker might suck some juice!!
 
March deluxe. It has to idle for a while and usually the hids have two be on as well, but not always. I have the crank, water pump and alt. I never noticed any problem on my 04 blown mach 1 mustang with the same pullies. But I rarely ever drive it.
 
I left out of my other post that fthe voltmeter I'm refering to is on the head unit for the capacitors. The point I was trying to make was that underdrives to affect charging a little. I know my alternator spins pretty slow. I always think faster than I type.
 
ok i finally got the crank pulley off i had to just about take off the whole front end of the car but its there now , so since i got that all torn apart i ripped out the air box silencer, and im adding my tranny cooler while im at it too. what is a piggy back set? the set i bought seems to be right and the polished billet aluminum pulleys are looking very heavy duty, the alt pulley was the same size as my other one . a three hour job is now on its third day (but im working too so i cant get to it like i wanted to). i am going to start a progress thread because im starting my complete gutting to install the sound dampener for my stereo system .
 
dont assume the alt pulley is the same as stock, my march pulley looked identicle in every way to the stock, till i threw calipers on the groove where the belt rides, it was only 8 thousandths smaller, but thats still smaller!
 
if the alt pulley is different it cant be by very much at all , well i got the underdrive pulleys all installed, deleted the airbox silencer, put a new belt on, and added a double external tranny cooler. took it out for a drive and i can tell a difference! there is more pull in the mids for sure.
looks great too! next move is to start the gutting for the stereo install!
 
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