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 6549 Posts Member #: 1149 #1 Basshunter Fan Force Racing ICT Dept Manager Miglia Turbo Am frum Yokshyer tha noes! |
6th Jun, 2011 at 02:14:01pm
Is there any way to test your earth strapping with a multimeter? I want to test how effective my earth with between my engine and body?
1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.
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Site Admin  15300 Posts Member #: 337 Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner & TM legend. |
6th Jun, 2011 at 02:16:48pm
You can measure using resistance on your meter. However unless the strap is fooked this may not show a lot as it does not place any electrical load on the connection. The best possible way is to use a Megger which applies 1000V to the connection and then measures the resistance. But I guess you don't have one of these (neither do I).
On 29th Nov, 2016 madmk1 said:
On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else Like fuel 😂😂 |
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6549 Posts Member #: 1149 #1 Basshunter Fan Force Racing ICT Dept Manager Miglia Turbo Am frum Yokshyer tha noes! |
6th Jun, 2011 at 02:38:02pm
Lol no i dont, i suppose i could get are lass to lean on the body work while i rig the subframe up to the mains hehe.
Edited by MikeRace on 6th Jun, 2011. 1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.
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 9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
6th Jun, 2011 at 02:41:05pm
I don't see that a Megger (or more acurately an insulation tester) will help. they are really to test high resistance insulation, hence the high voltage.
Fastest 998 mini in the world? 13.05 1/4 mile 106mph
On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination, talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry. |
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 730 Posts Member #: 1791 Post Whore Cranleigh, surrey |
6th Jun, 2011 at 02:57:56pm
i think his issue is his lass... "Cars are a lifetime of pain" |
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 12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
6th Jun, 2011 at 03:05:47pm
measure the voltage across it during cranking, On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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 10022 Posts Member #: 1456 Mongo Barnsley, South Flatcapshire |
6th Jun, 2011 at 03:20:35pm
On 6th Jun, 2011 MikeRace said:
i suppose i could get are lass to lean on the body work while i rig the subframe up to the mains Reminds me of! A couple are having dinner at a restaurant and the husband leans over and asks his wife, "Do you remember the first time we had sex together over fifty years a go? We went behind this very tavern where you leaned against the back fence and I made love to you." "Yes, she says, "I remember it well." "Ok," he says, "How about taking a stroll around there again and we can do it for old time's sake?" "Oh Charlie, you old devil, that sounds like a crazy, but very good idea!" There's a police officer sitting in the next booth listening to all this, and having a chuckle to himself. He thinks, "I've got to see these two old-timers having sex against a fence. I'll just keep an eye on them so there's no trouble." So he follows them. They walk along, leaning on each other for support, aided by walking sticks. Finally they get to the back of the tavern and make their way to the fence. The old lady lifts her skirt and the old man drops his trousers. As she leans against the fence, the old man moves in. Suddenly they erupt into the most furious sex that the watching policeman has ever seen. This goes on for about ten minutes. Finally, they both collapse panting on the ground. The policeman is amazed. He thinks he has learned something about life that he didn't know. After about half an hour of lying on the ground recovering, the old couple struggle to their feet and put their clothes back on. The Policeman, still watching thinks, this was truly amazing. I've got to ask them what their secret is. As the couple passes, he says to them, "Excuse me, but that was something else. You must of had a fantastic sex life together. Is there some sort of secret to this?" The old man says, "Fifty years ago that wasn't an electric fence." If something is worth doing, it's worth doing half of. |
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 263 Posts Member #: 40 Really Very Very Advanced 'Member' Stratford upon Avon |
6th Jun, 2011 at 03:21:31pm
On 6th Jun, 2011 Joe C said:
measure the voltage across it during cranking, yeah thats how i've always been taught, anything above 0.3v is dodgey. |
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6549 Posts Member #: 1149 #1 Basshunter Fan Force Racing ICT Dept Manager Miglia Turbo Am frum Yokshyer tha noes! |
6th Jun, 2011 at 03:45:34pm
I dont get any cranking lol. Its either my batt or my earth. I recon its the earth tbh. I just get a click. 1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.
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Site Admin 15300 Posts Member #: 337 Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner & TM legend. |
6th Jun, 2011 at 03:51:17pm
A decent jump lead from battery neg to a good earth will soon prove if it really is the earth.
On 29th Nov, 2016 madmk1 said:
On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else Like fuel 😂😂 |
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 3329 Posts Member #: 184 Senior Member Melton Mowbray, Pie Country |
6th Jun, 2011 at 06:41:55pm
As tom says, cut out the middle man. The problem with measuring the resistance with a multimeter is that you may well measure low resistance, but what the path is is anybodies guess. I have started minis before with no earth and it earthed through the accelerator cable. This would probably measured low resistance, but put 300A through it and it got a little hot. http://www.twin-turbo.co.uk
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 6729 Posts Member #: 618 Post Whore Glasgow |
6th Jun, 2011 at 06:47:19pm
I assume you've ruled out the solenoid? |
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 16540 Posts Member #: 4241 King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner Rotherham, South Yorkshire |
6th Jun, 2011 at 06:50:52pm
Isn't it a new starter?? On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it 
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6549 Posts Member #: 1149 #1 Basshunter Fan Force Racing ICT Dept Manager Miglia Turbo Am frum Yokshyer tha noes! |
6th Jun, 2011 at 10:46:20pm
Well looks like ive bought a duffer. The motor wouldn even turn over on its own, took it to bits and one of the bearings had siezed. I freed this up and got it turning with some wd. The car turns over but only for a short period. The body of the starter becomes hot and i have to leave it to cool. Its a brise one second hand, anyone know if these can be refurbed. 1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.
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10022 Posts Member #: 1456 Mongo Barnsley, South Flatcapshire |
6th Jun, 2011 at 10:51:58pm
Thats a bit of a bummer. You wanna borrow a std pre-engaged starter to get it running? If something is worth doing, it's worth doing half of. |
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6549 Posts Member #: 1149 #1 Basshunter Fan Force Racing ICT Dept Manager Miglia Turbo Am frum Yokshyer tha noes! |
6th Jun, 2011 at 11:20:59pm
Yeah can do mate, ill try and get it refurbed in the mean time.
1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.
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 1745 Posts Member #: 375 Post Whore Leicestershire |
6th Jun, 2011 at 11:37:18pm
I got mine refitted local to me. Cost a fortune though! |
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 2909 Posts Member #: 83 Post Whore Glasgow, Scotland |
6th Jun, 2011 at 11:41:31pm
ok guys, to test an earth strap you want to measure voltage not resistance. you want to measure the voltage at each end of the strap (or better each object the strap connects too) the idea is here that the strap becomes like the shunt in an ammeter. (an ammeter is just a bit of wire of known resistance with a volt meter across it)
turbo 16v k-series 11.9@118.9 :)
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6549 Posts Member #: 1149 #1 Basshunter Fan Force Racing ICT Dept Manager Miglia Turbo Am frum Yokshyer tha noes! |
6th Jun, 2011 at 11:43:34pm
Any idea whats up with the starter mate? It will turn over for around 10 to 15 secs then get really hot?
On 6th Jun, 2011 evolotion said:
ok guys, to test an earth strap you want to measure voltage not resistance. you want to measure the voltage at each end of the strap (or better each object the strap connects too) the idea is here that the strap becomes like the shunt in an ammeter. (an ammeter is just a bit of wire of known resistance with a volt meter across it) what you do is get the battery nice and drained, leave the headlights on for 20 mins or so engine off. now start the engine (you shouldnt need a jump) turn on the headlights, hazards, blower, wipers, and rear demister set the volt meter to the 0-2v range, and measure the voltages between body and engine block body and battery -ve engine block and battery -ve (aquard on a mini) if you get any voltage above 0.2v that earth circuit is crap, and when cranking will probably increase to several volts making it hard to start. now dont overlook the +ve side of things too. test between alternator output (thick brown) and starter solenoid. and solenoid to battery and solenoid to bulkhead fuzebox. repeat this with everthing on but the engine off to load test the main battery +ve lead. and battery earth strap. sorry for the waffle lol but this is by far the best way i have found to diagnose earth issues, no need for fancy kit :) 1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.
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2909 Posts Member #: 83 Post Whore Glasgow, Scotland |
7th Jun, 2011 at 12:09:10am
truthfully, no idea, starter siezing up, engine siezing up, brushes contaminated/on there last legs, solenoid burning out. thing is any starter turning for ~15 seconds will get hot, there not designed for heavy duty cycles and a bit of heat is normal. if the engine turns easy by hand, and the ignition isnt too advanced, and the power and earths are all in order i'd be suspecting the starter as faulty, even if recently "reconditioned" got a spare one to try? turbo 16v k-series 11.9@118.9 :)
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9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
7th Jun, 2011 at 08:08:00am
All you are doing when measuring resistance with a mutimeter is measuring voltage drop anyway, but rather than show you the drop, it gives you a resistance.
On 6th Jun, 2011 evolotion said:
ok guys, to test an earth strap you want to measure voltage not resistance. you want to measure the voltage at each end of the strap (or better each object the strap connects too) the idea is here that the strap becomes like the shunt in an ammeter. (an ammeter is just a bit of wire of known resistance with a volt meter across it) what you do is get the battery nice and drained, leave the headlights on for 20 mins or so engine off. now start the engine (you shouldnt need a jump) turn on the headlights, hazards, blower, wipers, and rear demister set the volt meter to the 0-2v range, and measure the voltages between body and engine block body and battery -ve engine block and battery -ve (aquard on a mini) if you get any voltage above 0.2v that earth circuit is crap, and when cranking will probably increase to several volts making it hard to start. now dont overlook the +ve side of things too. test between alternator output (thick brown) and starter solenoid. and solenoid to battery and solenoid to bulkhead fuzebox. repeat this with everthing on but the engine off to load test the main battery +ve lead. and battery earth strap. sorry for the waffle lol but this is by far the best way i have found to diagnose earth issues, no need for fancy kit :) Fastest 998 mini in the world? 13.05 1/4 mile 106mph
On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination, talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry. |
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2909 Posts Member #: 83 Post Whore Glasgow, Scotland |
7th Jun, 2011 at 06:19:42pm
I beg to differ will, a resistance check will only show up an absolutely destroyed earth, resistance meters do not check for current carrying capacity, my method checks the current carrying capacity of all the circuits. As an extreme example,substitute the engine earth with a speaker cable. Now it will show a good earth on a resistance check,but as soon as you turn on all the lights/demister/blower you can bet that wire will be dropping a volt or two across it. I don't recommend testing while cranking as this stresses the starter unduly. IMHO as always though :) turbo 16v k-series 11.9@118.9 :)
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3329 Posts Member #: 184 Senior Member Melton Mowbray, Pie Country |
7th Jun, 2011 at 07:31:26pm
I agree Dennis, your method is a better test. I am not sure how the starter motor would get stressed with an effective resistor in line though.
http://www.twin-turbo.co.uk
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12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
7th Jun, 2011 at 07:40:05pm
the thing is, which cable is bad? battery to shell, batery to solenoid, solenoid to starter, engine to body?
On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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1300 Posts Member #: 829 Post Whore essex |
7th Jun, 2011 at 08:10:58pm
one way to bypass it all is to jump start it from a 2nd car 1293 Turbo mini
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