07-06-2016, 11:00 PM
(07-06-2016, 03:20 PM)Chris306 Wrote: 24v starter system seems the easier simpler cheaper version to me. Might be wrong but the amps drawn from a 12v starter to turn an engine that size are goin be high enough to start melting wiring and knackering starters an battery's. Don't some of the old merc diesel cars run a 24v starter relay system.
Easier, simpler and cheaper in what world?
Running complex wiring for the 12/24v switch and finding space to fit a second battery isnt easy
Again wiring in the 12/24v switch isn't the simplest thing on earth
And as for cheaper the 12/24v switch is £130 plus another battery for £100 and then all the extra length of battery cables will add up to as much if not more than rewinding of having a custom built starter at £200-£300 (I've already had quotes)
As for enough amps to melt wiring have you not seen my maths earlier in this thread. Feel free to check the formula yourself but essentially 4kw starter divided by 12v is 333amps of current draw. Most decent batteries will provide at least 500amps of starting power.
As for old Mercs I don't know and don't care, it's a wiring, financial and packaging complexity that I don't want or need as it will work on 12v as lets not forget some of these engines DO run a pure 12v system.