New Battery

[lolitskasey]

Ok so i have been having a problem with my car my rpms bounce around when i have my music too loud and sometimes it stalls. I have been saving for a new battery and i don't know what one to get either a D1200 or D5100. I am running a Sundown SAZ-1500d with a FI BL 15.

[brewer_brewer]

get the biggest you can fit.

[brewer_brewer]

oh and as far as your rpm's bouncing.

it is probably that you have a small motor and when your system gets a load on it the alternator becomes harder to turn and it can sometimes drop your rpm's a hundred or so.

i used to have a civic with the smallest and crappy running engine ever with a 250 amp alt and it would sometimes stall my engine like that.

[MATTMAN24]

so drop a v10 in it lol, kidding

[raytard]

sometimes when the alectrical cant keep up, stuff like the coils and fuelpump cant get the current they need and let the engine die, if you're seeing like big bounuces, like 1000rpm or more, thats what it is

and its bad

battery and alt are needed...that batt will only help for the first few minutes before the system drains it and the alt cant recharge it

if its just like 100rpm or something, its just a little engine having trouble with an alt

[MATTMAN24]

ok so bigger alts are the way out of poor engine performance, is this why like race cars have a bigger alt?

holy crap im sorry guys i feel like a retard now im bout to unregister from the forum lol

if i offended anyone i appoligize for that

and for my poor spelling

Edited April 2, 2009 by MATTMAN24

[loganuf]

ok so BIGGER? alts are the way out of poor engine performance, is this why like race cars have a bigger alt?LOL

[lolitskasey]

K so your saying buy a new alt instead of buying a new battery first im going to be buying both anyway cause i need them. But what would be the first thing to buy?

[MATTMAN24]

well i larger batt i believe is needed first but need that alt asap

Edited April 2, 2009 by MATTMAN24

[audiofanaticz]

ok so bigger alts are the way out of poor engine performance, is this why like race cars have a bigger alt?

So wrong.....

A bigger alt will lower your horsepower even more then a smaller alt..

And you may want to goto the races and get a pit pass, almost every race car (not some honda with a big muffler and cold air intake that has never seen the track) does not run an alternator do to the extra loss of hp from having to spin the alternator. And almost every car in the pit will have a charger hooked up to it in between runs to keep their batteries full.

edit: im sure the circle jerk racers that drive in circles non stop have alts, but going around in a circle 200 times isnt racing to me.

Edited April 2, 2009 by Bangin Caddy