Started off with a joking numax was old battered 750cca. I used this to find electrical problems as a small issue becomes clearly apparent
Diesel P38 needs an mf31-1000 for cranking, petrol not so much but why not chuck the biggest you can get in there keep the ecus happy, if your pockets are deep enough.
I didn’t know about batteries or electrical back then until I met Data here, so threw a type 633/644 off a scania V8 turbo diesel lorry in mine (1000cca 125Ah). Its big and heavier than a Hancook not easy to get in. That suffered substantial abuse and did not benefit from the correctly adapted voltage regulator for non lead acid (
you need to be aware of this) although I payed over the odds it was a strong battery and worth the extra expense for the laughs we had. After nearly 4 years it suddenly died, not dead, but too problematic to entrust on a 38. It’s in the shed just in case
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Have a Hancook mf31 now fitted Jan 2021. no issues and holds its charge well. Few times I’ve worried with standing in the cold without a run but it holds strong so far but does have the correct VR ...
and the fanciest p38 battery bracket in the world
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