do all cars have voltage regulators?

[thebeast 10+ year member]

i have a 98 4runner and i bought a 150 amp alternator from 4alterstart.com now the problem is that at idle the alternator is even weaker than my stock one. once i bring the rpm up to about 1800 it gives full power 14.2-4 volts steadily. i found a company that will make me a custom alter. pulley, a smaller one. would this be bad for my charching/electrical system? does my 4runner have a voltage regulator to stop the volts from going up after i install a smaller pulley? thanks people

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[btnhfan 5,000+ posts]

Smaller pulley might help.

The thing with 4alterstart is, the put out the power at higher rpms. So in fact it might be worse than your stock alt at the lower rpms.

 

[TeenWolf 10+ year member]

My understanding is that all alts have voltage regulators. If they didn't, they wouldn't work properly. If you have a high volt battery, then you would need a high volt alt to compliment this.

 

[thebeast 10+ year member]

yeah i have an optima red top.

 

[thebeast 10+ year member]

what ho alternators have some good ho at idle?