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What % charge should my battery typically be? 2011 30is

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
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deltasierra
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What % charge should my battery typically be? 2011 30is

Post by deltasierra » Tue Mar 26, 2024 8:14 am

B21 wrote: ↑Mon Mar 25, 2024 10:16 pm flybobbie is correct…DME decouples alternator under acceleration..when you touch the brakes then alternator kicks in adding 4-5 BHP worth of de acceleration..
It would increase deceleration the real benefit is reducing load on the engine accelerating by a small amount
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B21
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What % charge should my battery typically be? 2011 30is

Post by B21 » Tue Mar 26, 2024 10:11 am

deltasierra wrote: ↑Tue Mar 26, 2024 8:14 am
B21 wrote: ↑Mon Mar 25, 2024 10:16 pm flybobbie is correct…DME decouples alternator under acceleration..when you touch the brakes then alternator kicks in adding 4-5 BHP worth of de acceleration..
It would increase deceleration the real benefit is reducing load on the engine accelerating by a small amount
It’s a 210 amp alternator…say the running load is 30 amps..then on acceleration it would only switch off that 30 amp load ..about 0.5 hp..on de acceleration it could put 120 amp in temporarily..so that’s about 4 hp of braking..

In a 200bhp + car quite trivial but shows the lengths they go to..
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
A very modified Atacama Yellow 35is :thumbsup:
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