Battery in the boot - voltage problems - Page 2

capri1276 · 28-12-2009, 08:35 PM

I have run small 12mm id mm cable with out a problem its up to the amps the starter needs as it work ok for many years till we changed the starter then we had problems so we went to 20mm id cable thats used on trucks to starter and if your alt has a voltage drop sence wire it has to be run to the battery aswell if your alt doesn't have it get one that has as most new cars run one

TBM · 09-04-2010, 11:04 PM

We have an isolator switch in the boot ,good when working around the motor ,and also works as an anti theft cut out .

switched on · 09-04-2010, 11:55 PM

overkill is always your friend when it comes to the elctrical system on your car. because ultimately its what will fail you on race day. the bigger the cable the less chance of voltage drop, heat soak also causes voltage drop because the harder your starter draws the more pressure it puts on cables. we use 00B&S commonly found on kenworth trucks. it is about the diameter of your thumb. none of the cars we have done ever have drama's cranking over after a skid and you cant get much more heat soak than that! bite the bullet spend the cash on good cable and you will be fine.

fcv85l · 03-05-2010, 08:31 PM

check voltage at starter solenoid during poor crank situation,anything below 9v is an issue,ensure voltage is sufficient at battery during crank ie above 9v if the voltage is below 9v at starter replace cables,i always prefer to use 70mm square welding cable costing around 25 bucks a meter.cost doesnt matter when your 10k plus hottie wont start hot.

EVL253 · 29-05-2010, 08:30 PM

as said heavy duty cable is good.i got mine for a carton of beer from a truck wreckers.came out of a mack truck.about 7 metres in total is about as thick as ur thumb if not bigger.i run a cable to the k frame for earth and one off the body to the battery and have never had a starting problem.overkill is good.hell i have 8 guage stereo cable to my headlights...

28-12-2009, 08:35 PM	#11 (permalink)
capri1276 Learner Driver Join Date: Apr 2007 Location: vic Ride: 89 Nissan 383 chev Patrol or Blown 304 Ford capri View My Photo Gallery Posts: 358	I have run small 12mm id mm cable with out a problem its up to the amps the starter needs as it work ok for many years till we changed the starter then we had problems so we went to 20mm id cable thats used on trucks to starter and if your alt has a voltage drop sence wire it has to be run to the battery aswell if your alt doesn't have it get one that has as most new cars run one __________________ capri1276 (steve) *To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.* *To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.*

09-04-2010, 11:55 PM	#13 (permalink)
switched on Wannbe Racer Join Date: Dec 2006 Location: MELBOURNE Ride: LX HATCHBACK TORANA View My Photo Gallery Posts: 672	overkill is always your friend when it comes to the elctrical system on your car. because ultimately its what will fail you on race day. the bigger the cable the less chance of voltage drop, heat soak also causes voltage drop because the harder your starter draws the more pressure it puts on cables. we use 00B&S commonly found on kenworth trucks. it is about the diameter of your thumb. none of the cars we have done ever have drama's cranking over after a skid and you cant get much more heat soak than that! bite the bullet spend the cash on good cable and you will be fine. __________________ switched on auto electrics 0407311946 adicted performance. 0397086232 www.fryzem.com.au

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09-04-2010, 11:04 PM	#12 (permalink)
TBM Clutch Popper Join Date: Jan 2010 Location: Katoomba Ride: Torana Posts: 79	We have an isolator switch in the boot ,good when working around the motor ,and also works as an anti theft cut out .

03-05-2010, 08:31 PM	#14 (permalink)
fcv85l Newby Join Date: Sep 2009 Posts: 49	check voltage at starter solenoid during poor crank situation,anything below 9v is an issue,ensure voltage is sufficient at battery during crank ie above 9v if the voltage is below 9v at starter replace cables,i always prefer to use 70mm square welding cable costing around 25 bucks a meter.cost doesnt matter when your 10k plus hottie wont start hot.

29-05-2010, 08:30 PM	#15 (permalink)
EVL253 Newby Join Date: Apr 2010 Location: nsw Ride: BLACK VB SLE Posts: 19	as said heavy duty cable is good.i got mine for a carton of beer from a truck wreckers.came out of a mack truck.about 7 metres in total is about as thick as ur thumb if not bigger.i run a cable to the k frame for earth and one off the body to the battery and have never had a starting problem.overkill is good.hell i have 8 guage stereo cable to my headlights...