TheBeast Posted November 22, 2007 Share Posted November 22, 2007 Hi, all ! What is the best way to do that? - Marko - Quote Link to comment Share on other sites More sharing options...
Mark Posted November 22, 2007 Share Posted November 22, 2007 Hi Marko and welcome to the forum could you introduce yourself here http://www.hmvf.co.uk/index.php?option=com_smf&Itemid=38&board=19.0 and tell us a bit about youself please, I am sure someone will be along and answer your question in a bit. Thanks a lot Quote Link to comment Share on other sites More sharing options...
Tony B Posted November 22, 2007 Share Posted November 22, 2007 Alternator, see Frank Jolley's website. http://www.classicheads.com/ Quote Link to comment Share on other sites More sharing options...
LeeEnfield Posted November 22, 2007 Share Posted November 22, 2007 Alternator, see Frank Jolley's website. http://www.classicheads.com/ He provides a good service,.........one of the guys in group has his kit on his Jimmy, and is well pleased. :-) Quote Link to comment Share on other sites More sharing options...
pop larkin Posted November 22, 2007 Share Posted November 22, 2007 Hi Marko, I have fitted the Frank Jolley kit to my Chevy (same kit as GMC). I have written an article about it here http://www.mvwf.co.uk/12voltconversion.htm Quote Link to comment Share on other sites More sharing options...
Jack Posted November 22, 2007 Share Posted November 22, 2007 Alternator, see Frank Jolley's website. http://www.classicheads.com/ I second that, got my 12 volt kit from Frank - best thing I have done to the GMC. Quote Link to comment Share on other sites More sharing options...
Chappers Posted November 23, 2007 Share Posted November 23, 2007 I had 4 kits from not so Jolleyover a couple of months, 3 worked fine one failed after about 4 miles,had to get the GMC towed home as I didn't have the old dissy plate with me and the old points had pitted badly ,Phoned him up and he said to do all the checks which I had already done,I even swapped the parts from one GMC to he other and explained this to him so it was guaranteed the part was knackered .I asked if he could send out a replacement next day delivery as we were going to a show in 2 days, He said he would only replace once he received the broken part back and it was tested which ment over a week before getting a replacement . I had to pay for another and the return postage for the knackered part before he would dispatch a replacement. In my opinion he personally wasn't very helpfull considering I brought 4 kits from him and a couple of his High output coils. However the products once working are a great asset to the reliability of the GMC's, Jeep and Dodge. Will be contacting http://www.pertronix.com I believe they do GMC kits and much cheaper than Frank Jolleys including the postage. Regards Steve Quote Link to comment Share on other sites More sharing options...
TheBeast Posted November 23, 2007 Author Share Posted November 23, 2007 thaks for the great info. But what about starter, it is also 6V ? Maybe needs change :? - Marko - The Darlings buds of may Quote Link to comment Share on other sites More sharing options...
Jack Posted November 23, 2007 Share Posted November 23, 2007 thaks for the great info. But what about starter, it is also 6V ? Maybe needs change :? - Marko - The Darlings buds of may Hi Marko. You can leave it in place if as most people do. I left my 6v in place and have been running on 12v for a long time with no problems at all. Just don't spin it over for to long at a time but you shouldn't to if you have upgraded to 12v as it should start pretty quickly. Quote Link to comment Share on other sites More sharing options...
TheBeast Posted November 23, 2007 Author Share Posted November 23, 2007 thanks Jack! What that Frank jolley kit costs? Or can I use my Ford Transit alternator? - Marko - Quote Link to comment Share on other sites More sharing options...
Tony B Posted November 23, 2007 Share Posted November 23, 2007 You can use any alternator. There isn't much curent draw on an old MV, depends if you want to put discrete gadget sockets on, in which case get a split charger and fit a second battery, that means you can play with toys and still start, a secondary use is you can self jump start. The problem is frst fitting to the brackets andd second which way round the belt will drive the alternator. A pre paid kit means all the problems are some one elses, bolt and go. Quote Link to comment Share on other sites More sharing options...
KimHansen Posted November 23, 2007 Share Posted November 23, 2007 Hi Marko One could consider keeping the 6 Volts installation. I wouldnt convert mine for all in the world. What would be next? Aircondition and CD player? . No way- My GMC was born 6 Volt and will stay so - I like everything original and try to keep it that way when possible. Out of curiosity, why would you like to convert? Is it a matter of spare parts? Best regards Quote Link to comment Share on other sites More sharing options...
Jack Posted November 24, 2007 Share Posted November 24, 2007 thanks Jack! What that Frank jolley kit costs? Or can I use my Ford Transit alternator? - Marko - Hi Marko. It cost around £150 for the all kit and very pleased with it! Quote Link to comment Share on other sites More sharing options...
R Cubed Posted November 25, 2007 Share Posted November 25, 2007 Hi Marko One could consider keeping the 6 Volts installation. I wouldnt convert mine for all in the world. What would be next? Aircondition and CD player? . No way- My GMC was born 6 Volt and will stay so - I like everything original and try to keep it that way when possible. Out of curiosity, why would you like to convert? Is it a matter of spare parts? Best regards Hear hear, quite agree about keeping our trucks original, but this is how I came to change mine to 12volts, what is the point in having an original truck but is not safe to drive to shows ! I went to 12volts only for the reason of having proper modern bright head lights and good rear lights and brake lights oh and a bright orange flashing light no other reason So that all other road users know I am infront and going slow, I try to avoid motorways as much as possible but this can still happen on dual carridgeways. You sometimes here, now and again, that a historic MV was shunted up the back by another truck and I want to try and avoid this as the best I can... All the best to one and all and Merry Christmas 31 days to go !!!!!!!!!!!!!!!!!!!!!!!!! Quote Link to comment Share on other sites More sharing options...
army driver Posted November 25, 2007 Share Posted November 25, 2007 Dont do it, keep it 6v you can buy H4 6v bulbs from rex ward ( super bright ) Quote Link to comment Share on other sites More sharing options...
KimHansen Posted November 26, 2007 Share Posted November 26, 2007 Safety first - no argues against that. But someone did many years ago try to teach me some lessons in electrical formulas. Something I do remember is that Power=Voltage x Current. If we have 6 Volts we will just need the double up Current compared to 12 Volt but the power and in this case the light would be the same. Like I said, my GMC has most of the electrical installations from the factory. But the rear lights is brand new and far from the original ones but still 6 Volts. I did make that compromise out of safety considerations. According to the danish regulations it would have been quite legal to stick to the original tail lights. Pictures on my www but only danish explanations available, sorry. Quote Link to comment Share on other sites More sharing options...
TheBeast Posted November 26, 2007 Author Share Posted November 26, 2007 I need a strong lights. 2 pcs extra lights to front ( 2 x 12V/55W/100W ) and worklights to rear ( ?W/but strong). And CB-radio. Maybe it is possible to leave original 6V to engine and install a second alternator & battery (12V) to lights and other 12V appatus. Quote Link to comment Share on other sites More sharing options...
LeeEnfield Posted November 26, 2007 Share Posted November 26, 2007 ;-) course, you could always SELL the jimmy and buy a BEDFORD. :-D 12 volt .............as standard, on these. :whistle: (yes, even in 1943.......) Quote Link to comment Share on other sites More sharing options...
TheBeast Posted November 26, 2007 Author Share Posted November 26, 2007 :-D ;-) BEDFORD, like My transit :-D :-D no no, I like a real vehicles, sorry ! If I buy a another car it is like this http://img131.imageshack.us/my.php?image=dbudsmaypt133op2.jpg Pop Larkin knows what is it 8-) Maybe I paint my 353 to blue color. The Darling buds of may Quote Link to comment Share on other sites More sharing options...
R Cubed Posted November 26, 2007 Share Posted November 26, 2007 Safety first - no argues against that. But someone did many years ago try to teach me some lessons in electrical formulas. Something I do remember is that Power=Voltage x Current. If we have 6 Volts we will just need the double up Current compared to 12 Volt but the power and in this case the light would be the same. I will try to explain if you have a 6 volt 50Watt bulb it will draw about 8 Amps If you have a 12 volt 50Watt bulb it will draw about 4 Amps Watts divided by Volts gives Current Current times Volts gives Watts Watts divided by Current gives Volts So if you fit larger Wattage lamps to your existing 6 volt system you increase the current more than it was, and could cause problems to the wiring and switches as they would be intended to work with the standard Wattage bulbs at 6 volts, if you change to 12 volts and up the wattage of the bulbs you should only get to about the same total current demand that it had at 6 volts with the standard type bulbs. Hope this helps R3 Quote Link to comment Share on other sites More sharing options...
LeeEnfield Posted November 28, 2007 Share Posted November 28, 2007 :-D ;-) BEDFORD, like My transit :-D :-D no no, I like a real vehicles, sorry ! Ok, I can understand that,..............so what are you doing with a gmc......... :whistle: :evil: ;-) Quote Link to comment Share on other sites More sharing options...
TheBeast Posted December 2, 2007 Author Share Posted December 2, 2007 When it is registered, I drive all days .... of course !! Quote Link to comment Share on other sites More sharing options...
Nickfree321 Posted August 16, 2013 Share Posted August 16, 2013 Hi all I've got a gmc 353 very slow in starting getting worried as it is going to be used a lot in the winter.and won't start can I convert just the starter to 12v??? Quote Link to comment Share on other sites More sharing options...
Locolines Posted August 16, 2013 Share Posted August 16, 2013 Mine starts on 6v in half a turn, even from cold. The guy I bought it from had rigged up a washer bottle in the cab with a manual pump (again from a windscreen washer ) which he then filled with petrol and pumped via a pipe into the carb.:cry: NOT A GOOD IDEA ! took it out as soon as I got it home. However, I start mine from cold by giving 30 pumps on the pedal, then full choke. As soon as it starts then choke in and hand throttle a quarter out. Works every time.:cheesy: Quote Link to comment Share on other sites More sharing options...
HWade Posted August 20, 2013 Share Posted August 20, 2013 Hello the answer is yes you could fit a 12 volt battery just to power the starter,a friend of mine has a gmc and he has 12 volts for starter and every thing else is 6 volts, just bear in mind that the 12 volt battery wont be getting any charge, but before you decide on 12 volts, I would have a closer look as to why the truck does not start on 6 volt very well, if its turning over slow check all of your earth wires, I have known the starter to draw so much voltage that there is not enough power left to give a good spark. Check your points and the gap, is the coil a good one, check the spark plugs gap, do you prime the fuel system and pump the trottle a few times before trying to start her up.Just a few pointers for you to look at Ive had 6 volt trucks and not had a problem. all the best Howard Quote Link to comment Share on other sites More sharing options...
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