Club126UK

Fiat 126 Chat => Tuning & Customising 126 Models => Topic started by: Darrell on February 02, 2009, 10:53:30 AM

Title: Power calculation
Post by: Darrell on February 02, 2009, 10:53:30 AM

Ok so with this snow, cannot go to work and cannot play with the car so I was wondering if there were a formula to work out power.

I found one..

Alas I am either as thick as a brick or there is some stuff I have never heard of..

BHP = PLAN/33,000

P is brake mean effective pressure, in PSI
L is piston stroke, in feet
A is the area of one piston, in square inches
N is the number of power strokes per minute
Brake Mean Effective Pressure (BMEP)

4 stroke BMEP = (HP x 13000)/(L x RPM)

How the heck do you find out the HP when you have know it to work out the power!

I was wondering what the theoretical hp rating of our engines is :)

You never know, they may have missed a trick  [-/

Title: Re: Power calculation
Post by: bis13 on February 02, 2009, 11:29:07 AM

darrell dear boy go outside and make snowmen like everyone else..lol the power of the 126 engine is just above a hamster ...

Title: Re: Power calculation
Post by: MaLi on February 02, 2009, 12:03:14 PM

Interesting...

It reminds me a bit pre-war RAC formula for hp.

If you have some time you could try to play with Engine Analyser (a sort of simulation software) - you might be able work out some tips for getting more bhp from an aircooled engine.

Title: Re: Power calculation
Post by: 126dave on February 02, 2009, 12:15:01 PM

for standard engines take the official fiat hp figure and subtract 10%, for tuned engines, think of a HP figure that will allow you to sleep at night after all the £ and euro spent on 'abarth' bits. i found '40+bhp' allowed me to sleep soundly...... ;)

Title: Re: Power calculation
Post by: Darrell on February 02, 2009, 12:19:59 PM

Wow 40 +
Did it make a huge diference to the car?

Title: Re: Power calculation
Post by: 126dave on February 02, 2009, 12:22:04 PM

Quote from: Darrell on February 02, 2009, 12:19:59 PM

Wow 40 +
Did it make a huge diference to the car?

yes, mostly because my wallet was so much lighter lol

Title: Re: Power calculation
Post by: Darrell on February 02, 2009, 12:31:22 PM

Hey ho, like all good woman they are good at wallet lighten-ing [-/

At least my little red lady doesn't get in a mood...you know the one....picture no sound is what I call it.

Title: Re: Power calculation
Post by: 126dave on February 02, 2009, 03:15:37 PM

lol funny you should say that, mine used to do that....when the 40dcoe had decided to part company with the engine YET AGAIN, or the engine tin had self destructed YET AGAIN,.....lots of silent moods in the workshop.....

Title: Re: Power calculation
Post by: dajwid on February 02, 2009, 04:12:36 PM

Allegro (Polish Ebay type of thingy) often has 'tuned' 126 with 50 60 and even 70BHP just by changing parts costing less than a tenner. ;)

Fantastic.

Another method is 1 BHP for every £2 you spend on tuning parts.

Pick a number add a few and thats what you tell your mates at the pub.

I always thing my cars have more power when I have given them a good clean. [-/

Title: Re: Power calculation
Post by: hudsonhenry on February 03, 2009, 09:53:38 AM

Quote from: dajwid on February 02, 2009, 04:12:36 PM

Another method is 1 BHP for every £2 you spend on tuning parts

If only that were true!!!

I would have at least 3000bhp by now.... ;D

Title: Re: Power calculation
Post by: nathan126 on February 03, 2009, 11:24:21 AM

http://www.otomoto.pl/index.php?sect=show&id=C7285530

daewoo motor?
different  ;)

Title: Re: Power calculation
Post by: goombas on February 05, 2009, 09:54:44 PM

its a good choice i have to say as for braeking down of old fiat engines or tuned ones