hey guys, need some imput. any help would be appreciated.
i installed an RSM underdrive crank pulley and an AEM alternator pulley on my car. i also had my alternator beefed up from 105 amps (stock) to 180 amps hoping that it would compensate for such a underdriven pulley system
welp, it seems like i made a BIG mistake, the car was running just fine and such when i got everything all shored up n back together, started up just fine and now im having problems, i went to start it again today and nothing, the battery was dead. so i jumped it, got it running good, shut it off... tried to start it, and DEAD again. i even put a 2awg wire directly from the alt. to the battery hoping it would fix the situation, and nope... it didnt even do a damn thing. i still havnt put the volt meter on it yet to see what the damn thing is putting out, but hopefully im going to get that done this evening. but it seems as though this pulley setup is NOT going to work, which is really F'd up because ive heard that the unothodox UNDERDRIVE crank pulley and the AEM alt. pulley are supposed to work just fine. but i guess in my situation a similar pulley setup just isnt going to work. i even went so far as to have my idle bumped up to 800 rpms from 600rpms when shifted tuned my VCM for me.
i know i know, i should be more worried about function over form, but DAMN IT i love the way that aem alt pulley looks
god this sucks.
anybody got a BLUE md ld9 alternator pulley they want to part with?
I'm sarting to have same problems, I have a bomz crank and Aem alt pulley, mine worked for few months without any problems and now its starting to act up. Im pulling them off this friday till i figure something out. I bought a brand new battery didn't last 2 days. Try using one of those volt stabilizers it might help.
Almir Omerdic wrote:I'm sarting to have same problems, I have a bomz crank and Aem alt pulley, mine worked for few months without any problems and now its starting to act up. Im pulling them off this friday till i figure something out. I bought a brand new battery didn't last 2 days. Try using one of those volt stabilizers it might help.
damn man, at least yours worked for a while!! mine hasnt worked yet. either way things go for me, im still going to be buying the MD LD9 stock sized crank and stock sized aluminum alternator pulleys whenever they come out again. i have to run 3 huge amps for my stereo and theres no way in hell its going to work for me the way i have it now.
i guess this is the price you gotta pay for trying something not a lot of ppl have done. which blows
Dang still not working?
Even with bringing things back to stock as much as possible.
No extra anything plugged in to use up voltage/power/amps
-M
Remember....syringes go in the RED waste basket.
Mastin wrote:Dang still not working?
Even with bringing things back to stock as much as possible.
No extra anything plugged in to use up voltage/power/amps
-M
nope man, ive got nothing extra turned on at all. i even just tried jumping it again thinking that possibly i didnt have it charged up enough to start it up again, so i ran both cars for like 30 mins, and as soon as i took the jumper cables off, the cavalier died. im just gonna say screw it and throw the stock alt. pulley on tonight and wait til md ld9's come out again. and with some luck hopefully i didnt fry my $280.00 alternator and my optima red top.
wow, i was going to buy the ur pulley and the aem pulley. guess not now. MD LD9 Hurry up with more 2.4 pulleys bro we need them!
In the planning stage for an all American TRD Cavalier.
Z24HO wrote:wow, i was going to buy the ur pulley and the aem pulley. guess not now. MD LD9 Hurry up with more 2.4 pulleys bro we need them!
yeah man, honestly... im kinda hoping the alternator was originally messed up so i can still run this setup and just have the company that did my alt. re-do it. but who knows.
this is so depressing
get your alternator tested somewhere before you assume its the pulley's. I've seen cars run on only 9volts of power. most auto parts stores can test it for ya, just pull it off and take it in. Or even swap the stock alternator back on, if that works and not the new one, the new one was broke. Either way though, you should not be underdriving a system that you plan on running 3 amps off of. And it is most likely not going to be the alternator pulley, I thought those were stock sized.
AutoFreak57 wrote:get your alternator tested somewhere before you assume its the pulley's. I've seen cars run on only 9volts of power. most auto parts stores can test it for ya, just pull it off and take it in. Or even swap the stock alternator back on, if that works and not the new one, the new one was broke. Either way though, you should not be underdriving a system that you plan on running 3 amps off of. And it is most likely not going to be the alternator pulley, I thought those were stock sized.
ur right... ur absolutly right, i SHOULD have had it tested before i installed it into my car, but like a dumbass, i was impatient and had to have the car running. look at me now. impatience FTL!
the aem alt. pulley is massive compared to the stock one, but believe it or not, it is lighter then the stock one.
as far as i know, when an alternator is built to put out high amperage they have to be spun faster to start charging at all due to the change in the way the magnetic fields cross eachother. when i had my alternator built i went with a 160A because it should start charging at 1000rpm or less. with yours being built for a higher amperage it would need to rev higher to start charging, add in the fact that you are under driving it and you need to rev even higher to charge.
_
Now with northstar V8, IRS, 20's n 22's
ok, well i guess i was wrong on the alternator pulley. but I think you need to switch to a stock one or stop underdriving your system. with 3 amps, you are gonna need a good charging system
before you blame anything test the system voltage at idle at the battery , and at the alt output lead
im guessing since you said your idle was 600 you got a auto , you better look towards about 900-1050 idle speed , and a looser tq converter , so you dont get idle creep while in gear
i tried every option on my friends 97 sunfire , stock alt and a 180amp , with the rsm pullies , i ended up putting it back to stock with the 180 to get it to charge at idle , that was before HPT came out , i even put a volt gauge in it for him to watch , so he could pop it outta gear at a light to keep it charging , and a couple months of he was tired of the rsm pullies and we did the stock
also check your battery , and make sure nothing is draining the battery while the car is off
ok guys, solved the problem... took the alt off, ran it down to advance and had it tested...and sure as shiit, its dead. dont ask me how but it didnt even meter out on the machine. seems to me like something may have been left un-connected inside, or possibly it just wasnt built correctly, for whatever reason the bitch is going back tommarrow.
im gonna have it tested with the aem on it as well as the stock pulley and see whats what. if it will keep up with everything that machine at advance can throw at it i think i should be ok.
going with a bigger alt with a slower moving pulley is just kinda pissing in the wind. bigger pulley will take more to get it turning. and underdriving it is just slowing it down. so your not going to pull as many amps out of it as you want and the bigger alt is just eating up any gains the pulley is giving you. add to that that depending on the alt. most shop built h.o. alts will allot of times put out less amperage at idle then a stock alt does. chances are the shop that built it will blame the pulley. id either run the h.o. alt with the stock pulley or run your stock alt with the aem pulley
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welp, the shop said that the voltage regulator had gone bad... they replaced it and i just picked it up.
what i dont understand is just how the hell this happened, maybe it was just a faulty part.. you would think they would have tested the ALT. before they gave it to me, maybe they just made a mistake. oh well, its going back on the car tonight and we'll see what happens.
im just going to run the stock alt. pulley for now, and maybe later on down the road i'll try the AEM once again, but id like to make sure everything is running well and such before i screw around with it again.
just goes to show ya, test everything before it goes in the car, i had to take the damn intake manifold off to get the alternator off, wasnt much of a job, just annoying thats all.
car runs! seems to be charging as well, i didnt have a meter at the time, so only time will tell.
although its got a stock alt pulley on
i wanna get things going and down the road, then maybe this summer i can try and put the aem back on.
the 2 pulleys combined is slowing down your alternator to much im thinking. take off the alternator pulley for the stock
Working on obtainting an M-Class license... ?? Hint: 2 wheels.
z yaaaa wrote:welp, the shop said that the voltage regulator had gone bad... they replaced it and i just picked it up.
what i dont understand is just how the hell this happened, maybe it was just a faulty part.. you would think they would have tested the ALT. before they gave it to me, maybe they just made a mistake. oh well, its going back on the car tonight and we'll see what happens.
im just going to run the stock alt. pulley for now, and maybe later on down the road i'll try the AEM once again, but id like to make sure everything is running well and such before i screw around with it again.
just goes to show ya, test everything before it goes in the car, i had to take the damn intake manifold off to get the alternator off, wasnt much of a job, just annoying thats all.
im in somewhat the same situation. just started the eco up and im only registering 11.4 volts with the motor running, i had the stock alt polished and they were supposed to test it before it was put back together. im thinking there is something wrong with it and i gotta deal with it this weekend.
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yep, thats EXACTLY what my car metered-11.4 then it died
get that ISH fixed man... i hope for your sake taking an alt off an eco is easier then mine was. @!#$ having to take off the intake!
