A&Q about 350Z
Q:
If uprate to a bigger battery, I beleive the engine will turn faster, but is there any improvement in the spark? if i did put in a bigger battery, would i then need to fit a bigger alternator?
A:
all a bigget battery will do is take longer to flatten when the car is stood, and offer more juice on a freezing morning
the ign system will still be at 12-14v so no benefit
you dont have to fit a bigger alternator , but its nice if you can
A:
so if i keep the battery the same, but fit a bigger alt, what effect will that have?
A:
i run a 90 amp alternator and a 80 or 90 amp battery its spot on and helps with the power demand from my amps
A:
it will charge the battery faster thats all
A:
if you have a larger battery, will there be less labour for the alt. to do and would you hence gain bhp and hence more top end fury?
A:
Thanks all for the advice.
A:
if you have a larger battery, will there be less labour for the alt. to do and would you hence gain bhp and hence more top end fury?
not convinced about that, altho sounds good in theory
A:
sounds like b.s to me.......the car will still be taking the same amount from the battery regardless of the size, which in turn the alternator will replace
A:
if you have a larger battery, will there be less labour for the alt. to do and would you hence gain bhp and hence more top end fury?
Can you explain this theory a little further? I thought the drag on the crankshaft from the alternator would be the same regardless?
A:
the alternator will work harder and put a bigger load on the engine if more electrics are turned on, but it will still need to replace whats lost however big the battery is
A:
I recently replaced my old battery and bought the largest capacity thing i could find. The cold cranking amps is almost double and it turns over almost twice as fast now, hence the engine starting faster etc! A larger capacity battery with more cold cranking amps was definately a benefit to me, especially starting on a cold winter morning etc.
A:
sounds like b.s to me.......the car will still be taking the same amount from the battery regardless of the size, which in turn the alternator will replace
i'd go along with this answer myself.
A:
Would it not take the power directly from the alternator itself, as it is always producing a fractionally higher voltage than the battery is holding due to voltage drop? Which would put more load on the alternator, so reigning in some of that top end fury?
A:
do u remember there was a kit sold by c&r enterprises that cut the alternator at wot to release top end fury
edited to make top end fury bold
A:
You forgot to write it in bold. It is top end fury.
Yep, I remember the kit - a bit pointless imo, as you still have the parasitic losses through the belt etc, and you are still spinning the alt. A better idea to release a little more top end fury would be to use an aircon compressor clutch to disengage it......... then you might get a hp.
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you'd also need that extra 1 hp to lug around the massive battery
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I would imagine with all the cost of immobilising the alternator when unleashing top end fury would be pointless for the little amount of hp you would probably gain.
A:
Do you reckon removing the PAS and alternator belts completely would unleash more top end fury on my mighty 8v?
A:
i used to use a big batt on my 8v mk2 but only because i did a lot of small journeys with my stero amps etc always on
A:
pas belt for sure, if your primary aim is more fury, but the alt. belt may cause more trouble to remove than its worth.
removing the alt. belt may save you fuel as your car would spend a lot of time being recovered by the RAC, hence youll only be driving to your destination and not back.
with regard to my 'bigger battery more fury" idea, if the electrical system is having less of an impact on a larger battery, the alt will not be having to work as hard to keep the battery topped up.
a long shot, but i have a feeling it would never be worth it
A:
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removing the alt. belt may save you fuel as your car would spend a lot of time being recovered by the RAC, hence youll only be driving to your destination and not back.
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True
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with regard to my 'bigger battery more fury" idea, if the electrical system is having less of an impact on a larger battery, the alt will not be having to work as hard to keep the battery topped up.
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False, as said above, the battery is only a storage medium, what goes out must be put back in by the alternator.
Edited to slip some bolds in becuse that seems fashonable at the mo.
A:
You forgot to write it in bold. It is top end fury.
Yep, I remember the kit - a bit pointless imo, as you still have the parasitic losses through the belt etc, and you are still spinning the alt. A better idea to release a little more top end fury would be to use an aircon compressor clutch to disengage it......... then you might get a hp.
I thought it was a good idea myself...
A:
does the 8v engine have any top end fury?
it runs out of revs at 6k, and peak power is achieved at just over 5k