hows it goin fellas, i have yet another question for yall. would it cause any problems if i got an alternator that was 200amps instead of the 95amp i have now. i was just wanting to do some upgrades and thats something i saw that i can do, but a friend of mine told me that that was too much and might cause problems, but i dont know if he knows what hes talkn about lol. what other upgrades can i do to the engine to give it more ooomph!! anything suggestions at all would be great. thanks.
Oh yeah...its a 95f150 xlt V8 5.0

 

A high out put alternator isn't going to hurt a thing. The amperage in the alternator will supply the vehicle with the amount of amps it needs to sustain a load, if your running 30amps at idle with everything off and then turn on the stereo and need 150amps it will read the drop and increase output to 150amps. Same with voltage. 200amps is alot my friend and not a whole lot is gonna use that much so make sure your going to need it before you buy it. A high out put alternator will also not increase engine HP or Torque, it will actually drag down the engine more at full load.

 

http://fullsizebronco.com/forum/show...ht=timing+bump Spend the money where it will make a difference. Fun & easy to do!

 

www.mean-green.com

i bought one. its a direct replacement. it wines at high rpm and weighs like 5 lbs more. 400$ but i needed it to run winch and lights

 

Make sure you upgrade the Alternators output wiring to the correct size or you might end up with a melt down on your hands.
DT

 

i was thinking of getting some underdrive pulleys, what good would that do for me?

 

It depends on which pulleys you get undersized. If you get only the alt. pulley it will increase the output at lower rpm but will not increase max output. A alt maxes out it's output at about 4k rpm alt. speed IIRC which (depending on crank pulley size) is 1500-2000 engine rpm.
What you gain, or loose, depends on which pulleys you change.
DT

 

ok i think im starting to understand this stuff more and more thanks to you guys. so what choices do i have. theres the a/c pully, the alt pully, and ???? i cant remember what else there was. Am i correct on those 2 atleast.
can you tell me what i should expect to lose and gain by changing these pullys and whatever other pully im forgetting. and what do yall recommend? thanks for the help. i actually feel like im finally learning about my truck!!!

 

Well basically all of your accessory drives (alt, power steering, water pump, air pump) are controlled by the crank pulley. Any accessory drive pulley you make bigger the slower it will spin in relation to the crank (engine) rpm. Decreasing the crank pulley diameter will slow an accessories speed down. This decreases drag and frees up a few HP. BUT by the same token slowing the speed of the alt down decreases available amps at slower engine speeds ( think night raining and cold..you heat, wipers and headlights are on) and the lights dim because you are asking for more amps than the alt can supply full voltage to so your system gates the extra amps needed from the battery to make up the difference, Well the battery runs a volt or so less than the alt does at full output so things slow down and go dim.
Also slowing the water pump can cause cooling issues at idle, Do you want to be sitting in a traffic jamb in the summer and boil over?
Clear as mud?
DT

 

i dont have to worry about a traffic jam. the town i live in is pretty small. but i do get the point you are making. i just use my truck to go to and from work and around town to run errands basically, unless me n my wife fell like making a trip to good ole abilene.
So the high output alternator would work great with the underdrive pulley then, right? i plan on putting up pics here in the next day or so so yall can atleast see what im working on. im hoping to get the hi output alt, underdrive pullys, clear headlights (hid), troyer dual efan (know of a cheaper option?), and a 6" susp lift from BDS (i heard that was a real good brand, is that correct) with some 35's.do you think i will need some new gears like 4.56? im just guessing that based on this chart. http://www.4lo.com/calc/geartable.htm thnaks again for all the help and info. i already put on a k&n cai and a flowmaster 40series with duals out the rear so far.