Microcoil with cotton on protank lacking throat hit

[ckim111]

I'm getting inconsistent results with my microcoil setup in my protanks. I use 28gauge on 1/16 drill bit and have triped 8 wraps, 10 wraps and even 11 wraps. Could are touching and not overlapping as I use a jig to make my coils. It heats up evenly from inside out and visually looks perfect. The problem is that when I put it in my protank and vape I get very little throat hit. Wondering if there is something that I'm missing? I even tried using a 5/64 drill bit and same thing.

Out of all my rebuild, I was able to make one hit great. It was 28gauge with 8 wraps. I'm also using cotton wicks. This one had great flavor and throat hit. Unfortunately I can't seem to duplicate this success!

Anyone ne have any pointers? Maybe my coil is not high enough to the chimney, or maybe it's too low in the housing? Any help would be appreciated. Thanks!

 

[super_X_drifter]

I'm getting inconsistent results with my microcoil setup in my protanks. I use 28gauge on 1/16 drill bit and have triped 8 wraps, 10 wraps and even 11 wraps. Could are touching and not overlapping as I use a jig to make my coils. It heats up evenly from inside out and visually looks perfect. The problem is that when I put it in my protank and vape I get very little throat hit. Wondering if there is something that I'm missing? I even tried using a 5/64 drill bit and same thing.

Out of all my rebuild, I was able to make one hit great. It was 28gauge with 8 wraps. I'm also using cotton wicks. This one had great flavor and throat hit. Unfortunately I can't seem to duplicate this success!

Anyone ne have any pointers? Maybe my coil is not high enough to the chimney, or maybe it's too low in the housing? Any help would be appreciated. Thanks!

It definitely sounds like coil placement is the culprit. I'm not familiar with the pro tank but if you can move the coil so more air is flow is from beneath the coil you will increase TH.

Additionally, if you position the coil further away from and / or off center of the air source TH increases

Tweaking those variables is how TH can be increased. Consequently, positioning the coil closer to the air source and so air flows over top of the coil will mitigate TH.

 

[Road_House]

I believe the air flow in a Protank comes from under the coil. The optimal position in the cup would have the bottom of the coil ID even with the bottom of the slot on the side of the cup. There's no wiggle room to really adjust the air flow over the coil so let's look at some other things.

For what it's worth, I can run an Evod (same coil setup as a Protank) on a Vamo at 8 watts and get better results with both flavor and TH than at the same wattage using a Vision spinner vv battery at the same wattage. Can't explain why, but the difference is there.

Some will say that for a 1/16 microcoil in a Protank that 30 ga at 1.8 ohms is the sweet spot running around 8 watts. That has been my experience anyway. ymmv of course.

The 30 ga heats up quicker so that may play a role. Have you experimented with the density of your cotton wick? You didn't mention how the vapor production is. I've noticed much more vapor with the above specs than the stock coils provide and with thicker vapor comes more nic per hit which does help with TH.

Perhaps you have a wee bit too much cotton and the wick is slightly choking the coil? Also, I seem to have better results without a flavor wick on top. My theory is that a flavor wick as they call it makes for uneven coil heat (cooler on top) and only provides a place for more gunk to build up on the coil, but that's just my opinion.

Just some thoughts on things you could tweak to change your results. Let us know how it goes for you.

 

[ckim111]

I actually have tried using different densities of the wick and also with and without the flavor sick. Same results. It's definitely the coil placement and or the type of gauge I'm using. For the Sweet spot you mention how many wraps on the 30gauge to get 1.8? Thanks,!

I believe the air flow in a Protank comes from under the coil. The optimal position in the cup would have the bottom of the coil ID even with the bottom of the slot on the side of the cup. There's no wiggle room to really adjust the air flow over the coil so let's look at some other things.

For what it's worth, I can run an Evod (same coil setup as a Protank) on a Vamo at 8 watts and get better results with both flavor and TH than at the same wattage using a Vision spinner vv battery at the same wattage. Can't explain why, but the difference is there.

Some will say that for a 1/16 microcoil in a Protank that 30 ga at 1.8 ohms is the sweet spot running around 8 watts. That has been my experience anyway. ymmv of course.

The 30 ga heats up quicker so that may play a role. Have you experimented with the density of your cotton wick? You didn't mention how the vapor production is. I've noticed much more vapor with the above specs than the stock coils provide and with thicker vapor comes more nic per hit which does help with TH.

Perhaps you have a wee bit too much cotton and the wick is slightly choking the coil? Also, I seem to have better results without a flavor wick on top. My theory is that a flavor wick as they call it makes for uneven coil heat (cooler on top) and only provides a place for more gunk to build up on the coil, but that's just my opinion.

Just some thoughts on things you could tweak to change your results. Let us know how it goes for you.

 

[ckim111]

I agree I think it's the coil placement. My coils are wrapped really tight. I know traditionally the coils would need to be higher for more th but not sure how it works in the protank housing. Thanks!

It definitely sounds like coil placement is the culprit. I'm not familiar with the pro tank but if you can move the coil so more air is flow is from beneath the coil you will increase TH.

Additionally, if you position the coil further away from and / or off center of the air source TH increases

Tweaking those variables is how TH can be increased. Consequently, positioning the coil closer to the air source and so air flows over top of the coil will mitigate TH.

 

[Road_House]

I actually have tried using different densities of the wick and also with and without the flavor sick. Same results. It's definitely the coil placement and or the type of gauge I'm using. For the Sweet spot you mention how many wraps on the 30gauge to get 1.8? Thanks,!

8 wraps on a 1/16 bit should get you close to 1.8 ohms.

Not much you can do about coil placement. Too low and your wick will be bent/choked below the bottom of the cup slots and you increase the risk of scorching the rubber grommet. Too high and you could short the coil on the chimney cap. Not much room in there to play with, that's for sure.

And that one you made with good results, would have been somewhere between 1 and 1.25 ohm with 28 ga depending on 1/16 or 5/64 bit size. Try the 30 ga at 1.8 ohms and 8 to 9 watts.

Everything SuperX says is quite true for RBA's where the air supply comes in the side of the cap and can be adjusted for the position of the coil and the coil can be aligned above or below the air hole. Not so much for a PT though