8 replies to this topic

[josh.evans]

hi does anyone know the r1's alternator amp output?
josh

[roofless]

going by the in-car ammeter, mines just under 14 amps

[josh.evans]

so how can this cope with what you have in your car like sound system etc. have you added an extra alternator? or just a big battery

josh

[roofless]

2 batteries just using standard yamaha factory electricals and voltage stabiliser unit

[Carlzilla]

just a quick question mart, doesnt it struggle at all when youve got the lights on, heater on, and all that fancy in car entertainment you have?

my old 45a lucas one used to struggle, and then died on me

[Monte Busa]

Thats about the same as mine...depending on how cool the regulator is and what teh RPM of the engine is.

If I use:

High Beams: ~5.5A
Rad Fan: 4.5A
Oil cooler fan: 2.5A
Total: 12.5A

...I only get 0.5 excess voltage from the regulator output to charge the battery at engine idle. I get around 13V when off idle with this load.

going by the in-car ammeter, mines just under 14 amps

[roofless]

just a quick question mart, doesnt it struggle at all when youve got the lights on, heater on, and all that fancy in car entertainment you have?

my old 45a lucas one used to struggle, and then died on me

all seems fine, not like I've tested it in any way, but never had a problem

[Monte Busa]

Correcting my current numbers (took direct readings with a current clamp probe this evening):

5PW ECU, Aim Mychron Digidash, ignition dummy light, Power Commander: 1A
Fuel pump (very low duty cycle, so not added to total below: 6A
rad fan + aux oil cooler fan: 8A
High Beams: 9A
Steady State total: 18A

...and I checked the 0.5V excess at idle to charge the battery - that was correct, so the load handling on my 5PW stock generator system appears to be closer to 20A or so...

Thats about the same as mine...depending on how cool the regulator is and what the RPM of the engine is.

If I use:

High Beams: ~5.5A
Rad Fan: 4.5A
Oil cooler fan: 2.5A
Total: 12.5A

...I only get 0.5 excess voltage from the regulator output to charge the battery at engine idle. I get around 13V when off idle with this load.

going by the in-car ammeter, mines just under 14 amps

[josh.evans]

is there any way that you could run the standard mini alternator of the r1 too? and roofless are the 2 batterys you have normal car batteries?

cheers

josh