DEZERTE

Whats the benefit of an FD uim or alternator on an FC? Ive seen people talking about it, I dont see why the stock uim or alternator would work any less effectively

koukifc3s

iTrader: (3)

it pushes out more power

91mazdarx7

it puts out more amps brightens lights when you have the a/c and all on

SonicRaT

iTrader: (6)

It's wired to provide more amps. As for the UIM, most people do it for the better layout of the piping for a FMIC, or simply because the runners are larger IIRC.

Kenteth

IIRC S4 alts are 80 amps, S5 100, and S6 120... sound right guys? Or its 80-90-100, I can't remember which. I'm running an S6 on my FC... its decent..., though I didn't notice much an improvement to be honest.... I suppose it did take away the stress of the old alt though.

91mazdarx7

i think your right on the first one no theres no real improvement just the lights dont dim when your driving when you put on the a/c or other components but i say and everyone else says its a good investment

Net Seven

iTrader: (5)

S4= 70amps s5= 80amps s6= 100amps

MrSparkle

if you're running stock with no electrical add-ons, you probably wouldn't see much of a difference. but if you're planning on something like a bumping sound system or an e-fan in the summertime, an fd alt would be a good idea.