Help me get some calculations right.

[DesmondTheMoonbear]

So I'm trying to set up my rsst to get the maximum performance out of my mvp v1.I've used .8 ohm builds on it before, and when I would switch it over to my magneto, I'd get MUCH better performance out of it. This leads me to think that while the MVP will FIRE a .8 coil, it's definitely not firing it at 5v.which lead me to see if I could find a limit of output online. I think I came up with a 3 amp limit on the battery.
So, using my ohms law calculator, with a 3 amp limit, I'm coming out with 1.7 ohms firing at 5 volts being the best chance to get the maximum performance with the rsst and mvp paired together.
Can someone more fit at all this than I rerun those numbers for me? It would be greatly appreciated!

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[State O' Flux]

Depending on the numbers you toss in a calculator... the 1.3Ω (and up) limit that innokin has established is pretty accurate... below that, and performance, vs. a mech, drops off considerably.
I run a 1.5Ω kayfun on an MVP2 fairly often at 10 watts (0.4a below the amp limit) and it works just fine.

 

[DesmondTheMoonbear]

So is the information on the amp limit of the battery I found correct at 3 amps? And is this a regulated limit? As in will the battery only physically give up 3 amps max? Or is it the same in a mechanical where the battery will give up more than its max amp limit but you run the risk of battery failure?

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[venemous]

Your math looks good to me. 5v, 1.7 ohms gets me to 2.94 amps and 14.7 watts. MVP is a 3 amp limit, I don't see you getting much closer than that.

 

[State O' Flux]

So is the information on the amp limit of the battery I found correct at 3 amps? And is this a regulated limit? As in will the battery only physically give up 3 amps max? Or is it the same in a mechanical where the battery will give up more than its max amp limit but you run the risk of battery failure?

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Based on a (oddly - unrelated to this, but that's where it went) e-mail conversation I had with an innokin engineer, if you take it to the 3a limiter (and by the math, a bit over at 1.3Ω), you're fine. It's the guys that think because a iTaste will fire at 0.8 or 0.9Ω... that it's fine to run it there, who may have early failures.
No, the 3a limit is a hard limit intended to protect the microprocessor. "Pinning it to the stops" may place undue stress on the limiter.

 

[Traver]

With a 0.8 ohm coil you are trying to use it on a battery with a 3amp limit. The best advice I can give you is to put those low ohm coils away until you learn something about batteries. You should never push a battery beyond it's amp limits.

I misread your post. It was the pv that has the limi 3 ampt but my advice still holds.

 

[Thrasher]

on a regulated mod there is no reason to use a low resistance coil on an atty.