PPI ProMOS 425 1/2 ohm stable?

Ryan from Ohio · Post by **Ryan from Ohio** » Mon Jul 28, 2008 5:29 pm

Tim wrote:I still don't know where the 1.4 came from
Tim

100-60= 40% in decimal its .4 So you take the amps X 1.4 (140%) calculating for inefficiency.

Tim · Post by **Tim** » Mon Jul 28, 2008 5:34 pm

ohh ok thanks ryan, it all makes sense now. Thanks alot for the help.

Tim

Bwcad1 · Post by **Bwcad1** » Mon Jul 28, 2008 6:07 pm

thats way more complicated then it needs to be lol man.

14.4v X 50Amps = 720

720 X .8 (80 Percent Efficiency) = 576watts

Ryan from Ohio · Post by **Ryan from Ohio** » Tue Jul 29, 2008 3:08 am

Well look at the math Bill.

We already know the rated watts and can guess at the voltage

Lets just work with the numbers given on that page...

13.8 Volts X 25 Amps= 345 WRMS X .6 (efficency)= 207 WRMS total power output.

Thats why I say that fuse cant be correct... This baby is to do 800 WRMS

OnYrMrk · Post by **OnYrMrk** » Tue Jul 29, 2008 6:45 am

Fishy wrote:Good Advice Neumman.
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Expect me around here with a whole crap load of questions.
- Dwight

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Bwcad1 · Post by **Bwcad1** » Tue Jul 29, 2008 7:13 am

Ryan from Ohio wrote:Well look at the math Bill.

We already know the rated watts and can guess at the voltage

Lets just work with the numbers given on that page...

13.8 Volts X 25 Amps= 345 WRMS X .6 (efficency)= 207 WRMS total power output.

Thats why I say that fuse cant be correct... This baby is to do 800 WRMS

no dude i wasnt actually doing the amp i was laying out my formula instead of doing 1.4 which imo is more difficult than just using .6.

Ryan from Ohio · Post by **Ryan from Ohio** » Tue Jul 29, 2008 8:30 am

ya thats the simple formula. only works when amps are established.

Tim · Post by **Tim** » Tue Jul 29, 2008 11:14 am

either way I like both formulae

I can figure either way now,
thanks guys :happy013:

Tim

Fishy · Post by **Fishy** » Tue Jul 29, 2008 11:58 pm

How about we just add a zero and be done with it, hehe.