Got my work cut out!
Got my work cut out!
Also, there's got to be some disadvantages for putting the battery in the boot surely? I would have thought we'd see a lot more manufacturers do it in cars otherwise
Yeah, I'm tempted to get a pro in to do it as I'm not 100% confident. Also I'm wondering if the battery should be grounded directly to any places in the boot? Seems an awful long way to go for grounding to the engine.
Also, there's got to be some disadvantages for putting the battery in the boot surely? I would have thought we'd see a lot more manufacturers do it in cars otherwise
jimxms Yeah, I'm tempted to get a pro in to do it as I'm not 100% confident. Also I'm wondering if the battery should be grounded directly to any places in the boot? Seems an awful long way to go for grounding to the engine.
Also, there's got to be some disadvantages for putting the battery in the boot surely? I would have thought we'd see a lot more manufacturers do it in cars otherwise
Not sure on grounding. Grounding in the boot doesn't sound a bad idea, though what conducts better from the back to the front? The chassis or a 0AWG cable?
I think most makers of new cars like to make boots as big as possible, and there is usually space in the engine bay. Some do though, my Dad's old '04 Jag XJ did. He removed loads of plastic covers from the engine bay looking for it before he realised! Usually better for weight distribution too.
![[Image: tempsig2.jpg]](http://i121.photobucket.com/albums/o227/84stoney/tempsig2.jpg)
ad: It was a tough call to make, but the Supercharged IS200 is being retired. ad:jimxms Yeah, I'm tempted to get a pro in to do it as I'm not 100% confident. Also I'm wondering if the battery should be grounded directly to any places in the boot? Seems an awful long way to go for grounding to the engine.
Also, there's got to be some disadvantages for putting the battery in the boot surely? I would have thought we'd see a lot more manufacturers do it in cars otherwise
Not sure on grounding. Grounding in the boot doesn't sound a bad idea, though what conducts better from the back to the front? The chassis or a 0AWG cable?
I think most makers of new cars like to make boots as big as possible, and there is usually space in the engine bay. Some do though, my Dad's old '04 Jag XJ did. He removed loads of plastic covers from the engine bay looking for it before he realised! Usually better for weight distribution too.
ad: It was a tough call to make, but the Supercharged IS200 is being retired. ad:Stoney Not sure on grounding. Grounding in the boot doesn't sound a bad idea, though what conducts better from the back to the front? The chassis or a 0AWG cable?
Good point, though I suppose the additional grounding would help electronics towards the rear of the car as it wouldn't have to go to the front, and then use the chassis to get all the way back.
Stoney I think most makers of new cars like to make boots as big as possible, and there is usually space in the engine bay. Some do though, my Dad's old '04 Jag XJ did. He removed loads of plastic covers from the engine bay looking for it before he realised! Usually better for weight distribution too.
Hmm I still think I'm missing something.
EDIT: Here's some interesting facts:
Assuming a 24-foot round trip, the voltage from a fully charged (12.6v) battery will drop as follows:
Cable Gauge Voltage Drop @ 400 AMPS Weight Of Cable Approx. Initial Voltage at Starter
00 .79 9.9 11.6
0 .98 7.8 11.4
1 1.24 6.2 11.2
2 1.56 4.9 10.8Note that the actual voltage drop will be slightly more, as this only includes the positive line--there will also be some loss from the ground line return from through the chassis.
Stoney Not sure on grounding. Grounding in the boot doesn't sound a bad idea, though what conducts better from the back to the front? The chassis or a 0AWG cable?
Good point, though I suppose the additional grounding would help electronics towards the rear of the car as it wouldn't have to go to the front, and then use the chassis to get all the way back.
Stoney I think most makers of new cars like to make boots as big as possible, and there is usually space in the engine bay. Some do though, my Dad's old '04 Jag XJ did. He removed loads of plastic covers from the engine bay looking for it before he realised! Usually better for weight distribution too.
Hmm I still think I'm missing something.
EDIT: Here's some interesting facts:
Assuming a 24-foot round trip, the voltage from a fully charged (12.6v) battery will drop as follows:
Cable Gauge Voltage Drop @ 400 AMPS Weight Of Cable Approx. Initial Voltage at Starter
00 .79 9.9 11.6
0 .98 7.8 11.4
1 1.24 6.2 11.2
2 1.56 4.9 10.8Note that the actual voltage drop will be slightly more, as this only includes the positive line--there will also be some loss from the ground line return from through the chassis.
jimxms Good point, though I suppose the additional grounding would help electronics towards the rear of the car as it wouldn't have to go to the front, and then use the chassis to get all the way back.
An extra earth or two never hurt anyone!
jimxms Hmm I still think I'm missing something.
What though? What is it you are missing?
ad: It was a tough call to make, but the Supercharged IS200 is being retired. ad:jimxms Good point, though I suppose the additional grounding would help electronics towards the rear of the car as it wouldn't have to go to the front, and then use the chassis to get all the way back.
An extra earth or two never hurt anyone!
jimxms Hmm I still think I'm missing something.
What though? What is it you are missing?
ad: It was a tough call to make, but the Supercharged IS200 is being retired. ad:the earth cable in the engine needs bolting to the chassis.
and car makers do put batterys in the boot,
thwe Sykline GTr battery is behind the rear seats. BMW estates have the battery in the boot as well.
![[Image: LexuS-Copy.jpg]](http://i65.photobucket.com/albums/h204/Sparkystav/LexuS-Copy.jpg)
Read my thread here: The Evolution of my Turbo Lexus from NA-Supercharged-Twin Turbo-Massive Single
Please leave your comments.
Sparkystav
08-06-2018, 03:13 AM #15You would earth the battery to the chassis in the boot.
the earth cable in the engine needs bolting to the chassis.
and car makers do put batterys in the boot,
thwe Sykline GTr battery is behind the rear seats. BMW estates have the battery in the boot as well.
Read my thread here: The Evolution of my Turbo Lexus from NA-Supercharged-Twin Turbo-Massive Single
Please leave your comments.
Most vans do not have much room in the bays and I beleive that cars will be moving there battery to other location, remember vw bettles had there under the seats in the 1960s
Must of today light weight van have moved the batteries to either under the seats or in the rear.
Most vans do not have much room in the bays and I beleive that cars will be moving there battery to other location, remember vw bettles had there under the seats in the 1960s
Also searching around, people say not to wire the ground in the boot as it creates ground loop issues (whatever that is). Its better to run + wire up one side of your car and - wire up the other side. Both 0AWG, and both connected to the OEM battery terminals.
Even then it seems you are likely to experience interference because of the power going through the + cable and its proximity to other wiring within the car (stereo speakers...aerial...etc).
I want to do it, so I've got a spot for my meth kit.....but getting it 'right' sounds like it could be a pita?
Isn't there some kind of safety issue with running a battery inside the car though. I thought i heard that unless you're running a gel? battery, it will release gasses which need to be vented outside?
Also searching around, people say not to wire the ground in the boot as it creates ground loop issues (whatever that is). Its better to run + wire up one side of your car and - wire up the other side. Both 0AWG, and both connected to the OEM battery terminals.
Even then it seems you are likely to experience interference because of the power going through the + cable and its proximity to other wiring within the car (stereo speakers...aerial...etc).
I want to do it, so I've got a spot for my meth kit.....but getting it 'right' sounds like it could be a pita?
Mikey is200/s13 Ive run 0 gauge up the passanger side from battery to amp to power sub no interferance what so ever then amp grounded in the boot.
Difference could be that your amp is only pulling a few 'amps' whereas shifting the whole battery to the boot is going to be pulling most of the power for the car and also charging from the alternator?
Mikey is200/s13 Ive run 0 gauge up the passanger side from battery to amp to power sub no interferance what so ever then amp grounded in the boot.
Difference could be that your amp is only pulling a few 'amps' whereas shifting the whole battery to the boot is going to be pulling most of the power for the car and also charging from the alternator?
Though you are right, you will have to be very careful with routing the 0AWG so as to not get alternator interference on your stereo, if you are running a system with rear mounted amps, stock system may well be ok. If you were to have a cable either side, this would be tricky.
If you have one main earth from the battery to chassis, I don't see how you would have any ground loop problems? Wherever the cable was mounted, though I think shorter is better where you have the choice, and running the earth up the side of the car is not necessary.
Jag having been doing it for 10 years now, and many other major makers are starting too. It makes a lot f sense in a van, as the shorter the bonnet, the longer the load space (within the same overall vehicle dimensions.)
EDIT: Actually, if you did have a cable each side, the amplifier(s) would be running from the battery in the boot and only the signal cable needs get from HU (or PC) to avoid interference, so could go down the middle of the car. But I think one +ive 0AWG front to back should do it, and so largely irrelevant!
ad: It was a tough call to make, but the Supercharged IS200 is being retired. ad:As I mentioned above mate, I would strongly recommend it being sealed and vented to outside. Then it will be safe.
Though you are right, you will have to be very careful with routing the 0AWG so as to not get alternator interference on your stereo, if you are running a system with rear mounted amps, stock system may well be ok. If you were to have a cable either side, this would be tricky.
If you have one main earth from the battery to chassis, I don't see how you would have any ground loop problems? Wherever the cable was mounted, though I think shorter is better where you have the choice, and running the earth up the side of the car is not necessary.
Jag having been doing it for 10 years now, and many other major makers are starting too. It makes a lot f sense in a van, as the shorter the bonnet, the longer the load space (within the same overall vehicle dimensions.)
EDIT: Actually, if you did have a cable each side, the amplifier(s) would be running from the battery in the boot and only the signal cable needs get from HU (or PC) to avoid interference, so could go down the middle of the car. But I think one +ive 0AWG front to back should do it, and so largely irrelevant!
ad: It was a tough call to make, but the Supercharged IS200 is being retired. ad:5 Guest(s)
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