transam001

iTrader: (3)

i have a 02 camaro ss with a 370 ci and a s484 on it. it made 800 wheel at 16 lbs but my volts keep dropping off so i am running out of fuel. what alternator are you buys using on big hp boosed cars. i have to have a stock size because of lacation and room. thanks alot

3 window

iTrader: (1)

How many amps is the alternator you have now? I take it you've checked the belt condition. Check grounds and do voltage drops all the way back to the battery. Bad grounds can do crazy things. Make sure there's no powder coating or anything on any brackets used for grounding. Then there might be an overdrive pulley for the alternator as well.

transam001

iTrader: (3)

its a stock 105 amp. i have a 8 ga hotwire kit to the pumps. i have checked all grounds. i have my fans on a switch. with them on when we did a pull the volts dropped as soon as it hit boost. we did a pull with them off and the volts didnt drop till 6000. belt is tight and brand new

3 window

iTrader: (1)

What's the normal charging voltage and what is it when it drops? Also, what pumps?

69-chvl

iTrader: (11)

Is the volts dropping b/c it cant keep up or is the alternator cutting out and your on batt voltage? I have an issue with the alternator turning off after ~6000 rpms.

transam001

iTrader: (3)

with my fans on it drop at about 4500 rpm ,with them off it was like 6000. volts are going to 11.6 when they drop off. were thinking that the altronator is to small and cant keep up. pumps are two 450 fed by a 8ga wire

3 window

iTrader: (1)

The pumps are going to draw more as you up the demand. Which makes sense with what's going on. If voltage was staying up and you were losing pressure, I'd suspect a wiring issue. But that's not the case. Sounds like an alternator to me. Don't rule out a bad battery either. A bad battery can affect the charging system as well. (I'm side you knew that though). Good luck.

transam001

iTrader: (3)

thanks for the help, i have replaced almost everything on the fuel side. regulator, in 1300 injectors all wiring , all 8 an fuel lines, fuel filters. thinking it was a fuel issue from a restriction.

3 window

iTrader: (1)

All wiring to the relay is good as well right? A poor circuit could cause a greater draw on the system mimicking a bad alternator.

transam001

iTrader: (3)

going to rewire that also and see if that helps.

blackeastbeast

I had almost the exact setup and the exact problem,after a lot of trial and error put on a 245 amp and fixed it .

transam001

iTrader: (3)

wow a 245, i was going to get a 200

3 window

iTrader: (1)

NO WAY you should need a 245 amp alternator. Something would be wrong. That's frickin huge!

blackeastbeast

Yeah its overkill but I got a pretty good deal on it.

3 window

iTrader: (1)

Well that explains it, 245 it is! Lol. I don't foresee any charging issues in your future.

transam001

iTrader: (3)

what do you think i need 145.

blackeastbeast

Friend of mine has a 145 truck alternator on his and it works fine.

transam001

iTrader: (3)

ok thanks

dw456post

Power Bastards alternators

stevieturbo

For years I had no problem with my alternator, even had it repaired after a failure ( PAS leak killed it )

Next time I replaced it with a new unit mainly for convenience. This one would always stop charging about 6k.

So repaired and refitted the old again....another few years pass and again it failed. Same place repaired it locally, and all seemed well. Except now over 6k it would stop charging too.

Clearly it's something to do with the regulator/rectifier inside that it doesnt like.

I bought a 170A unit from these guys, and also had them fit a slightly larger pulley to reduce alternator speed.

https://alternatorparts.com/cs130-cs...ternators.html

Been using it last 2-3 years and it's been perfect