ByronBayChris Posted 22February, 2016 Report Share Posted 22February, 2016 I've read lots of articles on the web (so it must be true), but can someone tell me if I would cause any damage to a 6v battery (and the rest of the car/gobes etc) if I jumped with a 12v battery.I have read to connect 12v pos to 6v pos, then 12v neg to 356 ground. And to only have it connected for a very short time while the car cranks.Or do you have another option for me ? Link to comment Share on other sites More sharing options...
Airhead Posted 22February, 2016 Report Share Posted 22February, 2016 Do it but pull the cable quick once it fires. Dont crank too long as it all starts to get hot. So that means the 356 is home? Woo Hoo Link to comment Share on other sites More sharing options...
Redracn Posted 22February, 2016 Report Share Posted 22February, 2016 Don't do it. Any bulbs that are on at the time will very likely blow. Charge the 6 volt battery with one of the many chargers that can do this. Link to comment Share on other sites More sharing options...
ByronBayChris Posted 22February, 2016 Author Report Share Posted 22February, 2016 Thanks guys. This is just in the chance that I need to jump. No, it's not here yet...but getting close. Link to comment Share on other sites More sharing options...
LeeM Posted 22February, 2016 Report Share Posted 22February, 2016 http://forum.porsche356registry.org/viewtopic.php?f=1&t=25147 Link to comment Share on other sites More sharing options...
ByronBayChris Posted 22February, 2016 Author Report Share Posted 22February, 2016 http://forum.porsche356registry.org/viewtopic.php?f=1&t=25147yep....been there - just checking on the local experts. Link to comment Share on other sites More sharing options...
LeeM Posted 22February, 2016 Report Share Posted 22February, 2016 Thought you would have. I wouldn't do it personally. A bloke I know used to carry a spare 6v battery and jump leads in his old Beetle just incase. Would it be worth converting it to 12v? Link to comment Share on other sites More sharing options...
StevepGT3 Posted 22February, 2016 Report Share Posted 22February, 2016 My old 6v FJ holden that had been around the clock at least twice had so little compression that I had to carry a 12v battery in the boot to spin it up fast enough to start. Link to comment Share on other sites More sharing options...
SteveT Posted 22February, 2016 Report Share Posted 22February, 2016 Once upon a time I had to start a 12 volt truck. Long story short hooked up 24 volts and it went straight away. Link to comment Share on other sites More sharing options...
jnr356 Posted 22February, 2016 Report Share Posted 22February, 2016 it's fine,just be quickdone it 100's of times Link to comment Share on other sites More sharing options...
ByronBayChris Posted 22February, 2016 Author Report Share Posted 22February, 2016 Here's another question.Would this work? 12v positive to 6v positive12v negative to my hand, which I then connect to the seat rail, start car, then disconnect.That way I can jump start without another person if necessary. Works? Link to comment Share on other sites More sharing options...
P-Kay Posted 22February, 2016 Report Share Posted 22February, 2016 Sounds feasible....It is an earth point of the car after all.... Link to comment Share on other sites More sharing options...
OBRUT Posted 23February, 2016 Report Share Posted 23February, 2016 A word of caution: If the 356 does not have an electric fuel pump, and has not been started for a while, it can take a lot of cranking to get fuel to the carbs. Link to comment Share on other sites More sharing options...
Airhead Posted 23February, 2016 Report Share Posted 23February, 2016 A word of caution: If the 356 does not have an electric fuel pump, and has not been started for a while, it can take a lot of cranking to get fuel to the carbs.And when it does start the seals in the carbys could be dry so it will leak fuel and you know where the carbys are.................... Link to comment Share on other sites More sharing options...
ByronBayChris Posted 23February, 2016 Author Report Share Posted 23February, 2016 Nice warning, but I'm pretty sure that will be okI'm just making sure I can do the basic stuff for now. A friend got stranded in their A last weekend and was lucky to get a push. Don't really want to ask Mrs BBC to get out and push. Link to comment Share on other sites More sharing options...
Airhead Posted 23February, 2016 Report Share Posted 23February, 2016 Don't really want to ask Mrs BBC to get out and push.356 doesn't weigh much. Link to comment Share on other sites More sharing options...
ByronBayChris Posted 23February, 2016 Author Report Share Posted 23February, 2016 356 doesn't weigh much.That's not her nickname. Link to comment Share on other sites More sharing options...
Russ Posted 23February, 2016 Report Share Posted 23February, 2016 have you got it on something to maintain the battery?http://www.ctek.com/au/en/chargers/6v Link to comment Share on other sites More sharing options...
symsy Posted 23February, 2016 Report Share Posted 23February, 2016 6V charger and a brand new small portable battery off a motor bike you can borrow for your start , will fit in ya bag mate Link to comment Share on other sites More sharing options...
Merv Posted 25February, 2016 Report Share Posted 25February, 2016 +1 on the CTEK 6V charger for $80 it is a bargain. A 'push" is good however! I will never change from 6V. Love it. I fitted a starter relay and some extra earths and it spins up fast now and does not load up the IGN switch. For using my digital timing light (12V), I found an old computer transformer that outputs 12V DC and that does the job nicely. Get a 6V motor cycle battery as a spare for jumps if you need it. Don't use 12V to jump start ... bad things happen ... but probably wont, unless your ignition switch is already on the way out Link to comment Share on other sites More sharing options...
ByronBayChris Posted 25February, 2016 Author Report Share Posted 25February, 2016 have you got it on something to maintain the battery?http://www.ctek.com/au/en/chargers/6vThanks Russ, I have a charger for this purpose also - but just looking out for being stuck on the road with Mrs BBC and trying to save HOURS of "....why do you buy old cars again...." conversation. Link to comment Share on other sites More sharing options...
Merv Posted 25February, 2016 Report Share Posted 25February, 2016 We all know that conversation Chris. There is no successful defence against it unfortunately. Link to comment Share on other sites More sharing options...
1q2w3e4r Posted 25February, 2016 Report Share Posted 25February, 2016 Just convert it to 12v and solve all the problems would be my advice. Link to comment Share on other sites More sharing options...
OZ930 Posted 26February, 2016 Report Share Posted 26February, 2016 How about a 12V to 6V step down transformer ?http://www.ebay.com.au/itm/Waterproof-DC-12V-24V-Converter-Regulator-Step-Down-to-6V-15A-90W-Supply-Module-/272089431527?hash=item3f59cb3de7:g:Rw8AAOSwk1JWgfPO Link to comment Share on other sites More sharing options...
symsy Posted 27February, 2016 Report Share Posted 27February, 2016 New Motorycyle battery on my doorstep , awaiting your collection , just fill and charge sir !!! Leads too….. Link to comment Share on other sites More sharing options...
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