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When 5hp isn't enough

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When 5hp isn't enough

Post by iansw on Sun Aug 16 2009, 22:08

I have been playing today, i bought a recon alternator on Thursday and today i fitted it to my Bradford 5hp, found an old battery that has been in the back of my work bench for at least two years, checked it with a meter 13.87volts scratch bit high i thought, stuck a headlight bulb across worked fine.

Next i started the old girl up ran for about 30 sec and died, no fuel topped up with some two stroke fuel i have, cranked it up again, great, connected the wires and it virtuly stalled the engine, so noww i need

More power
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were will it end

Post by RAB on Sun Aug 16 2009, 22:12

when youve lit up Blackpool lol! lol! afro
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Re: When 5hp isn't enough

Post by iansw on Sun Aug 16 2009, 22:15

Admin wrote:when youve lit up Blackpool lol! lol! afro

I could only get a 70 amp alternater i wanted a 100 amp+, good job i didn't, may have to rethink the inverter setup affraid
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Re: When 5hp isn't enough

Post by stationary stu on Sun Aug 16 2009, 22:22

Now thats got me thinking as I was going to get one of my engines to drive an alternator (have 2x120amp from the buses I used to have) and last week I got 5 (well 4 and 1 free) 6v 100amp hour batteries. I'll have to run the engine at full revs Laughing

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Re: When 5hp isn't enough

Post by iansw on Sun Aug 16 2009, 22:28

Stu
I heard somewhere i think (don't quote me) that an alternater kicking out 100 amps uses 5bhp to turn it,
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Re: When 5hp isn't enough

Post by iansw on Sun Aug 16 2009, 22:31

I will take a pic tomorrow and possibly a video, i think i have a flat battery somewhere just to see how much it barks Mad
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Re: When 5hp isn't enough

Post by stationary stu on Sun Aug 16 2009, 22:38

Just a thought what if the batteries are fully charged and I just have a few bulbs running would that work?

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Re: When 5hp isn't enough

Post by iansw on Sun Aug 16 2009, 22:48

Stu, it would be fine, if you were running say two 55w 12 volt halogens that equals 110watts divided by 12 volts is just under 10amps, not a problem, but i wanted to run a 2000w inverter and at full load would take about 300 amp from the batteries Laughing Laughing Laughing so i think i am going to have to re think my electric grill and go down the bbq route. Crying or Very sad
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Re: When 5hp isn't enough

Post by stationary stu on Sun Aug 16 2009, 22:53

I can get you some 6v 100amp batteries @ £5 each but no guarantees with them Neutral

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Re: When 5hp isn't enough

Post by iansw on Sun Aug 16 2009, 23:02

stationary stu wrote:I can get you some 6v 100amp batteries @ £5 each but no guarantees with them Neutral

Thanks Stu, thanks, but i have some batteries already, i was called out on a breakdown early this year on a big charter yacht, they had starting problems, told to pick up two new batteries and fit them, so i did, still wouln't start, checked the systems, found a fuse blown, i have still got the batteries 2 x 170 amp still not two years old, yacht was less than a year old Laughing Laughing Laughing
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