Measure the diode temperature, that;s the weak link and the hottest spot in all alternators, especially the Positive diodes, they are isolated from the housing.
i have a 2017 F250 Superduty...i know what alt i am getting when that time comes!! Forget about a system, what about the 4x4 guys who just need lights, winches etc.....this would work amazing for them too! Great video, i love seeing PROOF of the results not just someone telling me what my shit is rated at. Mechman FTW!!!!!
NO DOUBT... I love seeing a company able to back their product with full proof. I just ordered my first Mechman Alt yesterday. Cannot wait to get that badboy in the mail and then installed.
I have an F550 work body that I use for field maintenance and recovery when one of our box trucks blows a tire or get stuck, etc. Kept running down batteries using lights at night or winch, even with engine running. Switched to a Mechman added second pair of batteries in the body, thing keeps all 4 batteries charged even running a big light bar and a 18k winch at the same time.
At this point, I would honestly start having an alternator with an external cooling unit. Have it watercooled. Just like engines of old, you're making too much power for air cooling. Have it fully sealed, running coolant like today's electric motors do. Sell a DIY kit with presized lengths of braided steel coolant lines over to the engine bay. Have the coolant pump ran off the input shaft to the alternator. Would certainly sell with guys that mud-bog, off-road, or hell even those services like EMS/Fire Rescue. Barely adds labor to the install. Just a bit of drilling and tapping for the initial install of the aux. Radiator, and hell, betcha it'd make alternators last a whole lot longer.
How are you going to have enough room for liquid cooling passages? Maybe Marco holes through the drive frame and rear frame but you still have to make the drive frame and rear frame gasket it will fail.
My stock f350 7.3 idles at 650rpm. With the stock 64mm alt pulley and the 171.5mm crank pulley that's 2.68 to 1. So rpm x 2.68 = alt rpm at idle is 1742. That's a HUGE differance in available amps at idle.
the same spec can be found in an alternative alternator if you can find the model you want from mechman guys "its a VELEO 11358" unit that comes stock in bmw e70 e.t.c or the bigger unit that comes in the M50d the small unit does 230amp idle and 370 at rev haven't tested the big unit's peak new equipment need to be built for that seems like over 400 amps (make my load catch fire) these unit are used in other German cars to with all different types of mounts keep in mind the oem BMW version uses LIN bus for control (BMW x5 alternators are cheap & everywhere !) not E53 versions ! must be newer e70 & onwards
awesome video and product. i am curious, we see the high amp output performance is there for a minute or two, but how long can you sustain this load? can you go hours and hours everyday? say i want to run a pure sine wave inverter off my truck for a job site every day for a few months, years or what ever, can we expect to get this performance the entire service life for just for a few minutes here and there.
@@murrayshekelberg9754 this has always confused me, it leads me to think they must have made enough money to not care to make any more. my alt stock can output 150amps some how at idle and i tested this over 14 hours, i ran an inverter with a window ac unit a few computers and a few lamps over 120 feet of extension cord to my house just to see if i could do it and it worked just fine, but getting a bigger alternator and a smaller pulley for it is a goal of mine at some point when im done with my solar system i'm building
I have a 2010 f250 6.4 litre powerstroke. Will this alt fit my truck? The upgrade has a larger case, I am concerned if it will fit. Also, is this remanufactured or new equipment? Thanks in advance
LoL I bought an eBay 350 amp alternator for $350 put it on and started to have voltage drop to 11 with the system turned up you could watch the voltage on the dash just go south if you played the system at a easy listening volume and had lights on after an hour or less they would be flickering I didn't see voltage drop below mid 12's with the stock 14 year old 136a unit so I figured the output was ridiculously low . I have a 1/0 gauge cable ran in parallel with the factory charge cable and a 1/0 ground going straight to the battery as well as big gauge cable everywhere. I went out bought a $110 DC clamp meter.I started the truck off an optima I have sitting fully charged then hooked up thet two completely discharged batteries and a 3rd ran off the secondary battery with 1/0 gauge jumpers truck showed 45 amps off the charging cable and with all accessories in it peaked at 60 briefly then sat at 52 .22 amps I then turned on the stereo and amps came up very little at that point the alternator was at point where it's maxed out and can't make the amperage and volts start dropping obviously that only at a 5 volume at full tilt it drops very quickly below 11 and the systems amplifiers go into low voltage protection. ...I ran my truck at idle and 1100 high idle and then took a stick and propped it on the pedal for 2100 rpm still 52.22 amps and unable to keep up with amy draw beyond the truck at nest ...the stock 136a puts out more power . I'm reasonably certain the alternator is just a cheap Chinese stock alternator branded as a 350 as I can't see any immediate reason it wouldn't put out the power of it has it as I have everything upgraded even the ground they said was.not needed. Unless luckily unlike other things I buy them wait months to install this we as done right away so I can send it back ...lol...they better not expect me to pay for the ride either ;-)
Is there such a thing as too big an alternator??I always buy biggest is best but do I need it?? Twin battery setup,decent stereo,all led lighting and light bars,17000lb winch,uhf,etc etc.how do you calculate what is truly enough???
How does this guy not know you turn everything on and see what the maximum load you can pull is. That determines what you need to run at max, then you put in some head room so everything isn't stressed to the breaking point. This is how everyone determines what is enough.
You can purchase a AC/DC clamp meter on Amazon. They have many different brand name’s too choose from depending on how much you want to spend. Hope this helps you.🇺🇸
@@DTW-bx2vy I know if you can I know theres a way to turn a 130 amp alt into a 250 amp alt by cutting and splicing some stuff inside of one i've seen a video and if you wanted go to a junkyard and first test the alt to make sure its working fully and then start the mod i've seen videos on youtube in the past it could work for your alt and could make it be a 120 or 100 amp alt or even if its possible make a custom alt bracket to fit in there and figure out the few wires that's on the alt. I've never cut into any alt before but thats why i said use a junkyard one its a lot cheaper maybe 20-30$
The heat kind of bothers me (I guess I expected it to be lower). Your engine compartment is going to be a naturally warmer place already. What is the temperature class of the varnish you used on the winding insulation? Not to mention the limiting factor on the diode temperature, at a certain temperature they're going to break down and fail, so is that running cooler than the outer casing that you measured? I guess the ultimate question is, are your alternators rated for sustained load at peak rating in engine compartment conditions, and is that a point you have tested to?
Your alternator won't be running max load all the time either. Unless it's defective or not up to the task. These 350A alternators will not fall short as long as the wiring, grounds and fuses are all meeting spec.
@@jimparker7778 so you can connect a pure sine wave inverter and power an entire job site that say draws 250 sustained dc amps all day every day for months? i realize engine rpm is a factor, but we can also install smaller pulls to get the alt rpm up. the real question is has the alternator been designed for max out put at all times or not, how about 75% of max out put, or 50% etc etc. genuine question btw, not being a smarty about it
@@jasonbrown467 refer to the mfg, or Mechman. Good question. My gut impulse would be to suggest that your proposed arrangement would well exceed the load that the Mechman is designed to deliver job site requirements. .
@@jasonbrown467 Is this a brushed alternator, and if so, what is life expectancy of brushes if pushing unit so hard? Rotor current will be highest at idle with heavy load.
@@chetmyers7041 i honestly have no idea. i have brushed moters on my rc trucks. but i have never heard of brushes on alternators, but i really dont know
We have a HOT BOX we use for Marine applications. Also, you have to remember the engines cooling fans will have air flow going over/around the alternator in most applications.
I had a question I have 2010 Ford Expedition Limited 5.4L. The truck is PCM Controlled. I have the factory connector zip tied up. I have it bypassed where the blue wire is connected to the positive post and the yellow wire in on 12 volt ignition switch. I have group 65 Odyssey Extreme battery new. The resting voltage is 12.7 and the alternator when running at idle is 14.4 all day. If I let the truck sit for 4 to 5 days the battery is dead 10.5 volts. I installed the factory alternator and drove the truck and then let it sit fo 5 days and came out to start it with no problems. The battery was at 12.1 volts and the alternator is at 14.4 idle and driving. Why is it that the new alternator is draining my battery down? I also noticed in this video that you have the same bypass connector I am using without the Ford factory plug on the opposite end. Thanks
Because the new alternator NEEDS that plug plugged up!! That "blue wire connected to the positive post" is keeping the alternator on all the time, even when the truck is OFF. It's probably killing the alternator as well having the regulator/rectifier being powered up all the time. If you're wanting to bypass the PCM stuff, it needs to be done properly through a custom tune or some type of ECU programming.
@@mechmanalternators Can I add a relay to the blue wire connected to the positive post to stop the battery from draining? If I use the factory plug with the high output alternator the pcm will keep the voltage low 13 to mid 12 volts. I have a decent size audio system along with the truck normal electrical loads and the factory stock alternator of 10 years could not handle the load. What are your recommendations? Thank you again.
It is a very capable alternator that is only useful if your vehicle isn't in the factory configuration. Obviously the stock alternator performs fine if it's in good condition, purchasing this for a stock vehicle would be pointless compared to original equipment because it would never use it's full potential. That factory 118 amp potential works well and the mechman can do 320+ amp but in your stock vehicle it would never reach that point. The only electronic that can pull that many amps is the starter but a charged battery doesn't require more than 100 amps alternator output to recharge after starting. Super useful if you have aftermarket electronics making your stock alternator work overtime but pointless if your vehicle isn't modified
Obviously these high output alternators are made for vehicles with aftermarket accessories like sound systems, winches, light bars, compressors, etc. You're not saying anything.
if you listened to what he said he states that the 6k rpm is not crank rpm that's alternator rpm due to pulley sizes your alternator would be spinning this fast at cruising speeds but your engine would be down around 1600rpm at the crankshaft pulley.
Авто/Мото
When you're a "Gale Banks" approved,,,,, you're the best!
That's why I bought a 320
Measure the diode temperature, that;s the weak link and the hottest spot in all alternators, especially the Positive diodes, they are isolated from the housing.
i have a 2017 F250 Superduty...i know what alt i am getting when that time comes!! Forget about a system, what about the 4x4 guys who just need lights, winches etc.....this would work amazing for them too! Great video, i love seeing PROOF of the results not just someone telling me what my shit is rated at.
Mechman FTW!!!!!
NO DOUBT... I love seeing a company able to back their product with full proof. I just ordered my first Mechman Alt yesterday. Cannot wait to get that badboy in the mail and then installed.
if its STEVE MEADE approved then you know its top notch high quality gear that will last for years beyond your current build
I have an F550 work body that I use for field maintenance and recovery when one of our box trucks blows a tire or get stuck, etc. Kept running down batteries using lights at night or winch, even with engine running. Switched to a Mechman added second pair of batteries in the body, thing keeps all 4 batteries charged even running a big light bar and a 18k winch at the same time.
You guys are the best..the only 250 amp drop in alt for my honda crv. Gonna send it back down the road to get it upgraded to 300+ amps.
At this point, I would honestly start having an alternator with an external cooling unit. Have it watercooled. Just like engines of old, you're making too much power for air cooling.
Have it fully sealed, running coolant like today's electric motors do. Sell a DIY kit with presized lengths of braided steel coolant lines over to the engine bay. Have the coolant pump ran off the input shaft to the alternator.
Would certainly sell with guys that mud-bog, off-road, or hell even those services like EMS/Fire Rescue.
Barely adds labor to the install. Just a bit of drilling and tapping for the initial install of the aux. Radiator, and hell, betcha it'd make alternators last a whole lot longer.
I have a 2001 f450 with 7.3L turbo diesel that used to be an ambulance. It's has two alternators and neither is water cooled.
How are you going to have enough room for liquid cooling passages? Maybe Marco holes through the drive frame and rear frame but you still have to make the drive frame and rear frame gasket it will fail.
AWESOMENESS BROTHER
You guys should probably guard that test station. Just sayin, before osha See’s it and pays a visit.
Do make a alternator for the 2.0l dodge neon? I only see the 2.4l on your website.
What about the new dual alternator setups on a 6.7 powerstroke?
My stock f350 7.3 idles at 650rpm. With the stock 64mm alt pulley and the 171.5mm crank pulley that's 2.68 to 1. So rpm x 2.68 = alt rpm at idle is 1742. That's a HUGE differance in available amps at idle.
They don't answer comment questions do they? Makes me wonder about their warranty too.
Hey can that meter be used in a car? I seen a 400amp version online. My alts is a 320 so I assume it should be fine right?
Would be interesting if you included the amount of power it takes to drive the alternator at various amperage loads.
the calculation is about 1 HP per 25 amps DC. SO for 100 amps you're at around 4-5 horsepower.
very sexy veleo alternator absolutely recommended a must buy product !
GOOD JOB
My Z71 is suppose to be 145 amp. I'd like to test what is actually putting out . I think I need a better alternator
good job
the same spec can be found in an alternative alternator if you can find the model you want from mechman guys
"its a VELEO 11358" unit that comes stock in bmw e70 e.t.c or the bigger unit that comes in the M50d
the small unit does 230amp idle and 370 at rev haven't tested the big unit's peak new equipment need to be built for that
seems like over 400 amps (make my load catch fire)
these unit are used in other German cars to with all different types of mounts
keep in mind the oem BMW version uses LIN bus for control
(BMW x5 alternators are cheap & everywhere !) not E53 versions ! must be newer e70 & onwards
EXCELLENTE. !!!!!!!!
that’s insane!
sick alternator.
Can I weld with that alternator?
awesome video and product. i am curious, we see the high amp output performance is there for a minute or two, but how long can you sustain this load? can you go hours and hours everyday? say i want to run a pure sine wave inverter off my truck for a job site every day for a few months, years or what ever, can we expect to get this performance the entire service life for just for a few minutes here and there.
I'm wondering as well. They don't seem to be very good at responding to prospective customers.
@@murrayshekelberg9754 this has always confused me, it leads me to think they must have made enough money to not care to make any more. my alt stock can output 150amps some how at idle and i tested this over 14 hours, i ran an inverter with a window ac unit a few computers and a few lamps over 120 feet of extension cord to my house just to see if i could do it and it worked just fine, but getting a bigger alternator and a smaller pulley for it is a goal of mine at some point when im done with my solar system i'm building
i dont think the windings are gonna last long at those temps plain n simple
I have a 2010 f250 6.4 litre powerstroke. Will this alt fit my truck? The upgrade has a larger case, I am concerned if it will fit. Also, is this remanufactured or new equipment? Thanks in advance
All new.
where can i find a 1998 saturn sc1 high amp Alternator
LoL I bought an eBay 350 amp alternator for $350 put it on and started to have voltage drop to 11 with the system turned up you could watch the voltage on the dash just go south if you played the system at a easy listening volume and had lights on after an hour or less they would be flickering I didn't see voltage drop below mid 12's with the stock 14 year old 136a unit so I figured the output was ridiculously low . I have a 1/0 gauge cable ran in parallel with the factory charge cable and a 1/0 ground going straight to the battery as well as big gauge cable everywhere. I went out bought a $110 DC clamp meter.I started the truck off an optima I have sitting fully charged then hooked up thet two completely discharged batteries and a 3rd ran off the secondary battery with 1/0 gauge jumpers truck showed 45 amps off the charging cable and with all accessories in it peaked at 60 briefly then sat at 52 .22 amps I then turned on the stereo and amps came up very little at that point the alternator was at point where it's maxed out and can't make the amperage and volts start dropping obviously that only at a 5 volume at full tilt it drops very quickly below 11 and the systems amplifiers go into low voltage protection. ...I ran my truck at idle and 1100 high idle and then took a stick and propped it on the pedal for 2100 rpm still 52.22 amps and unable to keep up with amy draw beyond the truck at nest ...the stock 136a puts out more power . I'm reasonably certain the alternator is just a cheap Chinese stock alternator branded as a 350 as I can't see any immediate reason it wouldn't put out the power of it has it as I have everything upgraded even the ground they said was.not needed. Unless luckily unlike other things I buy them wait months to install this we as done right away so I can send it back ...lol...they better not expect me to pay for the ride either ;-)
Gotta love those Ebay alternators being hacked and hammered together in grandma's basement. :)
What would be interesting is to see how much power it takes to drive the alternator to produce that power.
Was thinking the same thing. How much hp is needed to produce 350 amps ?
350amps X 13.8V = 4830watts takes about 2 horsepower to make 1000watts so roughly 9.6 horsepower.
Do the alternators need to be warm or hot to put out the rated amps?
Hot amps are always going to be lower.
Is there such a thing as too big an alternator??I always buy biggest is best but do I need it?? Twin battery setup,decent stereo,all led lighting and light bars,17000lb winch,uhf,etc etc.how do you calculate what is truly enough???
How does this guy not know you turn everything on and see what the maximum load you can pull is. That determines what you need to run at max, then you put in some head room so everything isn't stressed to the breaking point. This is how everyone determines what is enough.
Kindly, could you please say what is the manufacture's name of this clamp meter?
You can purchase a AC/DC clamp meter on Amazon. They have many different brand name’s too choose from depending on how much you want to spend. Hope this helps you.🇺🇸
Do i need to upgrade any wiring to put this on my 2001 7.3?
JP5150LBC just the big 3. Starter alternator and ground wire to at least a 1/0 wire. It makes a huge difference.
my mechman alt most of the time is at 15 volts no higher than 15.2 volts not sure if that voltage will damage anything or not?
@@DTW-bx2vy nope not a single one
@@DTW-bx2vy I know if you can I know theres a way to turn a 130 amp alt into a 250 amp alt by cutting and splicing some stuff inside of one i've seen a video and if you wanted go to a junkyard and first test the alt to make sure its working fully and then start the mod i've seen videos on youtube in the past it could work for your alt and could make it be a 120 or 100 amp alt or even if its possible make a custom alt bracket to fit in there and figure out the few wires that's on the alt. I've never cut into any alt before but thats why i said use a junkyard one its a lot cheaper maybe 20-30$
What kind of warranty do your alternators come with?
Automotive versions are 2 year repair warranty and Marine versions are 1 year
I have a f250 super duty 6.2 gas. Will this also fit?
www.mechman.com/alternators/ford/f250-f350-super-duty/6-2l/2011-2019/
The heat kind of bothers me (I guess I expected it to be lower). Your engine compartment is going to be a naturally warmer place already. What is the temperature class of the varnish you used on the winding insulation? Not to mention the limiting factor on the diode temperature, at a certain temperature they're going to break down and fail, so is that running cooler than the outer casing that you measured?
I guess the ultimate question is, are your alternators rated for sustained load at peak rating in engine compartment conditions, and is that a point you have tested to?
Your alternator won't be running max load all the time either. Unless it's defective or not up to the task. These 350A alternators will not fall short as long as the wiring, grounds and fuses are all meeting spec.
@@jimparker7778 so you can connect a pure sine wave inverter and power an entire job site that say draws 250 sustained dc amps all day every day for months? i realize engine rpm is a factor, but we can also install smaller pulls to get the alt rpm up. the real question is has the alternator been designed for max out put at all times or not, how about 75% of max out put, or 50% etc etc. genuine question btw, not being a smarty about it
@@jasonbrown467 refer to the mfg, or Mechman. Good question. My gut impulse would be to suggest that your proposed arrangement would well exceed the load that the Mechman is designed to deliver job site requirements. .
@@jasonbrown467 Is this a brushed alternator, and if so, what is life expectancy of brushes if pushing unit so hard? Rotor current will be highest at idle with heavy load.
@@chetmyers7041 i honestly have no idea. i have brushed moters on my rc trucks. but i have never heard of brushes on alternators, but i really dont know
Where did u get that amp clamp
Miller Mechanical Enterprise u can get a fluke clamp meter for about $150-200 and it will last a lifetime.
that's great for a bench test but what about real world inside engine bay hood down and Texas 115 heat. Are we looking at a complete melt down?
We have a HOT BOX we use for Marine applications. Also, you have to remember the engines cooling fans will have air flow going over/around the alternator in most applications.
Absolute output isn't as important as efficiency. I'd like to see efficiency numbers.
I had a question I have 2010 Ford Expedition Limited 5.4L. The truck is PCM Controlled. I have the factory connector zip tied up. I have it bypassed where the blue wire is connected to the positive post and the yellow wire in on 12 volt ignition switch. I have group 65 Odyssey Extreme battery new. The resting voltage is 12.7 and the alternator when running at idle is 14.4 all day. If I let the truck sit for 4 to 5 days the battery is dead 10.5 volts. I installed the factory alternator and drove the truck and then let it sit fo 5 days and came out to start it with no problems. The battery was at 12.1 volts and the alternator is at 14.4 idle and driving. Why is it that the new alternator is draining my battery down?
I also noticed in this video that you have the same bypass connector I am using without the Ford factory plug on the opposite end. Thanks
Because the new alternator NEEDS that plug plugged up!! That "blue wire connected to the positive post" is keeping the alternator on all the time, even when the truck is OFF. It's probably killing the alternator as well having the regulator/rectifier being powered up all the time. If you're wanting to bypass the PCM stuff, it needs to be done properly through a custom tune or some type of ECU programming.
@@mechmanalternators Can I add a relay to the blue wire connected to the positive post to stop the battery from draining?
If I use the factory plug with the high output alternator the pcm will keep the voltage low 13 to mid 12 volts. I have a decent size audio system along with the truck normal electrical loads and the factory stock alternator of 10 years could not handle the load.
What are your recommendations?
Thank you again.
@@906lane Simple answer is yes you can. The CORRECT answer is to have the alternator built with a different regulator (our GM 4pin style).
So if the alternator is functioning at max amp output will that cause it to get hot and lower the voltage output?
Is that 0/4 gauge wire on the alternator? WTF
thats not 4,, might be 2,, but probablly 0,,, although 4 gauge can handle around 250-300 amps with that short of a cable length
hello friend make a video about your test bench I thought it was too top
Wow.
It is a very capable alternator that is only useful if your vehicle isn't in the factory configuration. Obviously the stock alternator performs fine if it's in good condition, purchasing this for a stock vehicle would be pointless compared to original equipment because it would never use it's full potential. That factory 118 amp potential works well and the mechman can do 320+ amp but in your stock vehicle it would never reach that point. The only electronic that can pull that many amps is the starter but a charged battery doesn't require more than 100 amps alternator output to recharge after starting. Super useful if you have aftermarket electronics making your stock alternator work overtime but pointless if your vehicle isn't modified
@JoManOut Hey, that's exactly the answer to my question. Thank you!
Obviously these high output alternators are made for vehicles with aftermarket accessories like sound systems, winches, light bars, compressors, etc. You're not saying anything.
Need a alternator for 87 Chevy sportvan contact info?
Where can I get it
how is 8 diodes posibel? 3 coils so 6 diodes or doppel coil thats 6 or 12 diodes
All you hafta do is look inside the back cover at the rectifier.....that's how it's possible.
ya,it got 200amp,but only 12.4 v ,not good for battery charging.
Wait 5000 engine rpm or pulley rpm?
5000 shaft speed of alternator
Since when is 6000 RPM cruising speed for ANY deisel?
Oh later he verified... Alternated rpm...
So its really a 330amp..
He's says you got to put it to the floor to get max power at 6000 rpm... Lol 😂
Watch the video. He says alternator rpm 6000 not engine rpm
@@steveinity yeah
I’m sorry but 2500 is cruising speed for these trucks. I have one Diesel engines don’t run as high rpm as a car
Made in Chiiiiiiina......
6000 rpm is way to high... I doubt your truck or car will cruise around that rpm more like 2-3k rpm cruising.
if you listened to what he said he states that the 6k rpm is not crank rpm that's alternator rpm due to pulley sizes your alternator would be spinning this fast at cruising speeds but your engine would be down around 1600rpm at the crankshaft pulley.
@@gregthemechanicman I hope Dbuilt Series isn't a mechanic.
He states that this isn't crank RPM only at the alternator.
Does low ampere alternatpr can affect my brightness of my light and horn?
Yes