So, I just put a uwell Crown 3 sub-ohm (0.25 SUS316 parallel coil head) on both the Drag X Plus Pro and the OBS Engine and got great performances from both at 80w. The voltage difference is crazy to me though. The DXPP went up to 4.89V (coil reads at 0.3 Ohms) and the OBS Engine rocks the same 80W at about 5.45V (coil reads at 0.28 Ohms). There is definitely some chip wizardry going on here that I'm unaware of or my Engine has been dropped one too many times. Let's do the mathZ.
Both the DXPP and Engine are single 217 boosted mods.
The mathZ: (both mods set to 80W)
DXPP - 4.89 Volts divided by 0.3 Ohms is 16.3 Amps. (Volts / Ohms = Amps)
16.3 Amps times 4.89 Volts = 79.7 Watts. (Amps x Volts = Watts)
--An expected outcome--
OBS Engine - 5.45 Volts divided by 0.28 Ohms is 19.46 Amps. (Volts / Ohms = Amps)
19.46 Amps times 5.45 Volts = 106.1 Watts. (Amps x Volts = Watts)
--Not an expected outcome-- At 80W, the Engine is performing at 106W. In fact, dialing down the mod to 65W is where it performs closely to the DXPP at 80W.
This is both good and bad. We can actually achieve higher performance than we think the Engine is limited to however, it makes the limits at which we push the battery to, guesswork. I just tested 100W on the Engine and the math says it's performing at about 133W. Amp draw is only 21.79 though, so not crazy high. Definitely not dangerous if we are using batteries with >25 Max CDR. However, if someone thinks their mod is drawing 16.3 Amps and is well within the limits of their batteries with 20A Max CDR, then they're going to find themselves with a pretty warm mod and shortened battery lives.
**Another reason to buy batteries with extra Max CDR headroom.**
This mod remains one of my favorites because of its small form factor and wide range in its ability to perform, but I'm starting to wonder if it's because of what is written above. I'm not really bothered by it, but just makes me realize I need to be a little bit more cautious about the readouts. Also another reason I like mods that show Amp load as a readout.
Has anyone else experienced this with their OBS Engine Mods?
Both the DXPP and Engine are single 217 boosted mods.
The mathZ: (both mods set to 80W)
DXPP - 4.89 Volts divided by 0.3 Ohms is 16.3 Amps. (Volts / Ohms = Amps)
16.3 Amps times 4.89 Volts = 79.7 Watts. (Amps x Volts = Watts)
--An expected outcome--
OBS Engine - 5.45 Volts divided by 0.28 Ohms is 19.46 Amps. (Volts / Ohms = Amps)
19.46 Amps times 5.45 Volts = 106.1 Watts. (Amps x Volts = Watts)
--Not an expected outcome-- At 80W, the Engine is performing at 106W. In fact, dialing down the mod to 65W is where it performs closely to the DXPP at 80W.
This is both good and bad. We can actually achieve higher performance than we think the Engine is limited to however, it makes the limits at which we push the battery to, guesswork. I just tested 100W on the Engine and the math says it's performing at about 133W. Amp draw is only 21.79 though, so not crazy high. Definitely not dangerous if we are using batteries with >25 Max CDR. However, if someone thinks their mod is drawing 16.3 Amps and is well within the limits of their batteries with 20A Max CDR, then they're going to find themselves with a pretty warm mod and shortened battery lives.
**Another reason to buy batteries with extra Max CDR headroom.**
This mod remains one of my favorites because of its small form factor and wide range in its ability to perform, but I'm starting to wonder if it's because of what is written above. I'm not really bothered by it, but just makes me realize I need to be a little bit more cautious about the readouts. Also another reason I like mods that show Amp load as a readout.
Has anyone else experienced this with their OBS Engine Mods?
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