Voltage Drop Testing Results

[zmauls]

I hope this hasn't been done already.

I figured I would put in the time and effort to test out all the set-ups I could think of on my Reo Grand.

These tests were all performed using:

• SONY VTC4 Flat Top 18650
• 0.20Ω coil

Different batteries and resistances will yield different results as far as numbers go, but, presumably, in the same directions.

Here are the results:
______________

Previous Stock Pin, Previous Stock Spring
Battery - 4.19V
Under Load - 2.65V
Voltage Drop - 1.54V
______________

Previous Stock Pin, 15A Fuse
Battery - 4.19V
Under Load - 3.27V
Voltage Drop - 0.92V
______________

Brass Pin, 15A Fuse
Battery - 4.19V
Under Load - 3.47V
Voltage Drop - 0.72V
______________

New Stock Pin, New Stock Spring
Battery - 4.19V
Under Load - 3.28V
Voltage Drop - 0.91V
______________

New Stock Pin, 15A Fuse
Battery - 4.19V
Under Load - 3.72V
Voltage Drop - 0.47V
______________

As you can see, unfortunately, the fuse is still better than the spring. A fuse paired with the new gold plated firing pins provides the best combination for performance by far.

This is not meant to put anyone down or make anyone upset. I am simply providing facts to help everyone get the most out of their Reo Grands.

vape on, and godspeed.

 

[redeyedancer]

The reason for that is the spring is made of 3 pieces So you lose a little in the spring . For me I have to have a spring in my mods I sleep better knowing it will drop if there is a short . The fuse is great for guys with common seance and some mechanical ability
Just so you no I am not upset

 

[supertrunker]

What's interesting is the new setup is almost identical to the old fuse mod setup, so more people can run lower coils if they wish safely and have better performance and battery life if they don't.

You already know what i'll do!

T

 

[zmauls]

The reason for that is the spring is made of 3 pieces So you lose a little in the spring . For me I have to have a spring in my mods I sleep better knowing it will drop if there is a short . The fuse is great for guys with common seance and some mechanical ability
Just so you no I am not upset

Well Rob, we both know there's a massive lack of each on earth today. Take the me of last year, for example.

Thanks for the input.

 

[marsos52]

thanks for posting your voltage results (especially the way you did it)

it has to be helpful for any modder and will take the guess work out making a setup that will work first time out.

 

[zmauls]

thanks for posting your voltage results (especially the way you did it)

it has to be helpful for any modder and will take the guess work out making a setup that will work first time out.

Thank you, sir!

 

[zmauls]

Putting this back on the front page in case some people missed it. Don't want to let this thread die quite yet.

 

[Wickeddeuce]

Honestly, I appreciate the information, but it doesnt really mean anything to me... with the improved performance of the Sub Ohm Kit, I am satisfied, while it is great to strive for more, I do not need more... rocking a .3 to .37 ohm dual coil set up makes me happy, sure i could get less voltage drop, but i dont need it, it performs well enough as is... besides, with the way that things worked out last week after installing the sub kit, and vaping a batt down to 2.8... i am good with what is there...

for those who need more this is fantastic, and great... i appreciate what those of you out there who search and push for more do... because you help make things better for all of us... but i have found my happy, im sure lower, and different will work out... but man oh man... .3 .35 range offers the satisfying vape and flavor for a decent amount of juice... dont have to drain juice like crazy either... i mean this uses more than id like it to as is... but... thats the sacrifice aint it...

 

[c3 rolling]

Thanks for the info! Good job!

 

[rc10mike]

Im willing to bet sanding to bare metal below the spring base plate would also help with voltage drop.

Think of the spring as a ground. Its where everything ties together. If you dont have a good contact ground, everything will suffer. The spring is held in place by a single tiny screw, which doesnt have a lot of surface area directly touching the bare aluminum of the mod.

Removing the coating below the spring base plate would undoubtedly increase surface area of the ground.

Which could help, just sayin'

 

[darren molnar]

Thanks for doing this test zmauls, much appreciated!
Would you be able, or, willing to do the same test with a more conservative 1 ohm coil? I'm curious if the results would be as dramatic.

 

[GreatestUnKnown]

A couple questions:

1. The use of the 15A fuse over the 10A fuse, is this only because of the lower internal resistance of the 15A fuse?

2. I have not been as frequent to these threads as of late but what is the max (or minimum ohm limit) power that the new drop spring can handle? In other words is there a point where the spring will prematurely drop just because of a certain build or heat threshold?

I understand most don't tend to vape at our build range Zmauls but I thank you for these test results. These conacts allow REOs to be a more viable mechanical option while still providing the end user with some form of safety.

 

[zmauls]

Honestly, I appreciate the information, but it doesnt really mean anything to me... with the improved performance of the Sub Ohm Kit, I am satisfied, while it is great to strive for more, I do not need more... rocking a .3 to .37 ohm dual coil set up makes me happy, sure i could get less voltage drop, but i dont need it, it performs well enough as is... besides, with the way that things worked out last week after installing the sub kit, and vaping a batt down to 2.8... i am good with what is there...

for those who need more this is fantastic, and great... i appreciate what those of you out there who search and push for more do... because you help make things better for all of us... but i have found my happy, im sure lower, and different will work out... but man oh man... .3 .35 range offers the satisfying vape and flavor for a decent amount of juice... dont have to drain juice like crazy either... i mean this uses more than id like it to as is... but... thats the sacrifice aint it...

Like I said, this post is only to provide information to help everyone get the most out of their Reo Grands. If you're quite content with your set-up, which it sounds like you are, I'm happy for you. Others, like me, always want to go a bit further. I'm not saying anyone should or shouldn't run their mods a certain way. I'm just analyzing the available options.

Im willing to bet sanding to bare metal below the spring base plate would also help with voltage drop.

Think of the spring as a ground. Its where everything ties together. If you dont have a good contact ground, everything will suffer. The spring is held in place by a single tiny screw, which doesnt have a lot of surface area directly touching the bare aluminum of the mod.

Removing the coating below the spring base plate would undoubtedly increase surface area of the ground.

Which could help, just sayin'

All these tests were done using mods with a sanded base. Thanks for bringing that up.

Thanks for doing this test zmauls, much appreciated!
Would you be able, or, willing to do the same test with a more conservative 1 ohm coil? I'm curious if the results would be as dramatic.

That's a really good idea. I would be willing to, but it might take some time before I get it up on this site. I'll see what I can do.

A couple questions:

1. The use of the 15A fuse over the 10A fuse, is this only because of the lower internal resistance of the 15A fuse?

2. I have not been as frequent to these threads as of late but what is the max (or minimum ohm limit) power that the new drop spring can handle? In other words is there a point where the spring will prematurely drop just because of a certain build or heat threshold?

I understand most don't tend to vape at our build range Zmauls but I thank you for these test results. These conacts allow REOs to be a more viable mechanical option while still providing the end user with some form of safety.

I only use a 15A fuse because a 10A fuse blows in about a second with my build. 10A fuses are fine for builds running at 0.28Ω or above. As for the spring, it technically should be able to handle anything your battery can. The lowest "safety threshold" for 18650's is around 0.20Ω, and the spring handled that just fine while I was testing it.

Different batteries have different minimum safety thresholds:

 

[zmauls]

Information.