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View Full Version : Alternator upgrade (Stock to Stock)


wakescene
04-05-2011, 12:50 PM
I have a 2001 LTR330hp motor. For this year it came stock with a 51amp Alt. In 2002 IIRC they upgraded the Alt to 70-71amp.

Anyone know of any harm it would cause by simply upgrading to the higher amp Alt without changing anything else?

Thanks

brucemac
04-05-2011, 12:55 PM
i do not know the answer, but there is a brand new 90A alternator direct from Indmar on the wakeworld classifieds section under accessories. just an fyi.

wakescene
04-05-2011, 01:15 PM
Thanks brucemac.

they are asking a lot for that unit, I can find it for $175-$225.

wakescene
04-06-2011, 02:29 PM
So as far as my research can tell, upgrading to the 70amp or even the 90amp won't be a problem, it's all a matter of dram on the system.

what is an issue is that the new Alt's use either single wire or a single wire + a plug. My old style uses a wire and a couple of other wires with ring connectors for the connections. I will have to check this out before making the jump. Of course there is always the option to have it re-wound for a higher amperage, which may ultimately be cheaper.

etduc
04-06-2011, 05:14 PM
I have a 2001 LTR330hp motor. For this year it came stock with a 51amp Alt. In 2002 IIRC they upgraded the Alt to 70-71amp.

Anyone know of any harm it would cause by simply upgrading to the higher amp Alt without changing anything else?

Thanks

Here's a sizing chart. http://www.alternatorparts.com/wire_size_chart.htm Measure the length of the longest battery wire, to alt. or ground point. Most audio/performance guys would say, go to next size up. You will be increasing you alt. size by more than 25%. Power cable is cheap, and easy to install.