Benefits of upgrading to a high ampere alternator (65 - 95)?

[AcidBurn]

Mga sir, ok lang ba mag-upgrade ng high ampere alternator for honda stock engine like ph12? Will it only have good effects or may disadvantages din? TIA

[K.I.L.L.]

Mga sir, ok lang ba mag-upgrade ng high ampere alternator for honda stock engine like ph12? Will it only have good effects or may disadvantages din? TIA

You'd probably want to upgrade your wiring too.

[7138]

maybe a bit of engine power will be sacrificed kasi your engine
will be spinning an alternator with a bigger capacity.

pero baka neglible din naman.

[kinyo]

if you won't be needing the extra power the new alternator will provide ... it is just a waste of money

[glenn manikis]

IMO.. the bigger the better.. done that on my van... from 95amperes to 140amperes...

Fuel consumption, power... no change at all... the same lang...

ang napancin ko lang mas tumagal ang life ng Battery ko, mas lumamig A.C. maybe because mas lumakas ang mga buga ng hangin ng aircon aux fan...

electricals.. wala naman kailangan baguhin.. at pareho lang naman na 12volts yan...

lastly easier morning start ups.... lalo na luma na ang van ko..

[cocoy]

IMO.. the bigger the better.. done that on my van... from 95amperes to 140amperes...

Fuel consumption, power... no change at all... the same lang...

ang napancin ko lang mas tumagal ang life ng Battery ko, mas lumamig A.C. maybe because mas lumakas ang mga buga ng hangin ng aircon aux fan...

electricals.. wala naman kailangan baguhin.. at pareho lang naman na 12volts yan...

lastly easier morning start ups.... lalo na luma na ang van ko..

curious lang sir.. what van do you have and where did you find that 140ampere alternator.. thank you..

[Retz]

Mdyo ot lang... Sa genset may alternator at may katumbas na engine. Either kung mas malaki ung alternator or mas maliit compared sa rating ng engine ay wala din mangyayari if you dont change or upgrade your engine. What i mean is hindi ba match dapat alternator sa size ng engine? Mas malaki nga alternator mo pero ung engine mo could only give this much. Just an analogy.


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[s10pao]

Mdyo ot lang... Sa genset may alternator at may katumbas na engine. Either kung mas malaki ung alternator or mas maliit compared sa rating ng engine ay wala din mangyayari if you dont change or upgrade your engine. What i mean is hindi ba match dapat alternator sa size ng engine? Mas malaki nga alternator mo pero ung engine mo could only give this much. Just an analogy.


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ung additional load dahil sa malaking alternator kaya pa rin i-offset nung engine.

[12vdc]

Mdyo ot lang... Sa genset may alternator at may katumbas na engine. Either kung mas malaki ung alternator or mas maliit compared sa rating ng engine ay wala din mangyayari if you dont change or upgrade your engine. What i mean is hindi ba match dapat alternator sa size ng engine? Mas malaki nga alternator mo pero ung engine mo could only give this much. Just an analogy.


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Or in other words..

Sa konstant load, ang resistance ng generator sa engine kung na upgrade ay lesser. Kung lumiit(downgrade) naman, ang engine ay overworked or overload condition.

Depende sa load. Bakit ka maglalagay ng 200Kva na generator na 20KvA lang ang konstant load.. Waste of energy to rotate the huge generator.

[jhnkvn]

Mdyo ot lang... Sa genset may alternator at may katumbas na engine. Either kung mas malaki ung alternator or mas maliit compared sa rating ng engine ay wala din mangyayari if you dont change or upgrade your engine. What i mean is hindi ba match dapat alternator sa size ng engine? Mas malaki nga alternator mo pero ung engine mo could only give this much. Just an analogy.

For all other purposes, yes. Since you try to mate the output with how much load you throw at it. It's kinda useless to have an alternator capable of 300A when you can only generate 30A of power. That's like feeding your car's engine with a fuel running up a Zesto straw.

However, this is not a problem in a car since your car's internal combustion engine can output so much horsepower. If you want to do it at a very simplistic view, 150A * 12V = 1,800W = 2.41 horsepower -- a minute amount on how much horsepower you generate at a given engine RPM.

This is why the people who set up their sound setup extensively (aka me) sees reduced fuel efficiency. One is that an ICE system will take up weight inside your car and second it makes your alternator demand more power depending on load. This is why overall, I suffer a rough -1km/L automatically on my day-to-day travels.

[red_one]

Mdyo ot lang... Sa genset may alternator at may katumbas na engine. Either kung mas malaki ung alternator or mas maliit compared sa rating ng engine ay wala din mangyayari if you dont change or upgrade your engine. What i mean is hindi ba match dapat alternator sa size ng engine? Mas malaki nga alternator mo pero ung engine mo could only give this much. Just an analogy.

Not really. Alternators produce AC power through electromagnetism formed through the stator and rotor relationship. It has no relation to actual engine power output. That's why you can put a higher output alternator in your vehicle with same engine. Example, if you add amplifiers, subwoofers, speakers, etc that requires more power, you can simply upgrade the alternator and not change engine.

[s10pao]

Not really. Alternators produce AC power through electromagnetism formed through the stator and rotor relationship. It has no relation to actual engine power output.

san mo naman nakuha yang info na yan?
ano exactly ung "stator and rotor relationship" na sinasabi mo?
ano ba ang kailangan baguhin sa alternator para tumaas ang output current nya?

[confused shoes]

Unless you want to install a bigger battery then it's a waste of money.

[red_one]

san mo naman nakuha yang info na yan?
ano exactly ung "stator and rotor relationship" na sinasabi mo?
ano ba ang kailangan baguhin sa alternator para tumaas ang output current nya?

dito brod.. How Alternators Work? HowStuffWorks "What Is an Alternator?"

[red_one]

Sa genset may alternator at may katumbas na engine. Either kung mas malaki ung alternator or mas maliit compared sa rating ng engine ay wala din mangyayari if you dont change or upgrade your engine.

i assume this is generator set. fixed RPM ang motor ng genset. kaya if you want to produce more AC power, you might need a more powerful motor. note the final output is AC, either 110V or 220V.

compare with a car alternator. automotive alternators are usually belt driven at 2-3 times crankshaft speed. the alternator runs at various RPM (which varies the frequency) since it is driven by the engine. this is not a problem because the alternating current is rectified to direct current. here the final output is 12V DC, regardless of engine RPM.

[s10pao]

dito brod.. How Alternators Work? HowStuffWorks "What Is an Alternator?"

meron kasing info na hindi nakalagay dyan.

stator - electrical windings that harness the magnetic field to convert it to electric current.
rotor - source of the magnetic field (typically a magnet)

para ma-increase yung output ng alternator, kailangan mo ng mas malakas na source ng magnetic field.
sa pagtaas ng magnetic field, kailangan mo ng mas mataas na force para maiikot yung rotor.

yun ata ung point ni retz. pero since may excess HP ang typical stock engine para maiikot ung mas malakas/malaki na alternator, hindi mo na kailangan talaga magpalit ng mas malakas na engine.

[glenn manikis]

IMO... and based on my experience... on old vehicles and vehicles with too much accessories... your car battery would last longer...

IMO on an average, a car in the phils. is only driven 10-20 km per day and mostly in traffic, in effect your batteries will never get fully charged and sulfation might occur.

parang generator lang yan... mabuti nang meron tayong allowance para in the near future if we want to upgrade we wont have any power of battery problems...

[nivraarvin]

It has no relation to actual engine power output.

Of course, there is a difference. Imagine an alternator as an inverse electric fan. You need more twisting force for it.