wcs

iTrader: (2)

So what spec graph did you use for your app?

1) https://www.rx8club.com/showpost.php...56&postcount=2

2) https://www.rx8club.com/showpost.php...77&postcount=6

3) https://www.rx8club.com/attachment.p...6&d=1266716801


To me they are all different.
Which one did you pick, just so I know.

Thanks

virusakos

As I have written in the first post, the calculator is based on work done by teknics and IOANNIStsa.
I didn't come up with an equation nor I used a graph.
I got the equation and just translated it to code.

Here it is:
((((chamber_compression_in_kgf^cm2 * 98.0665) / 1000.0) + (((-0.514) * logf(rpms)) + 2.8411)) * 1000.0) / 98.0665

wcs

iTrader: (2)

Thanks Virusakos
I looked at the IOANNIStsa app but I still couldn't get the same values (exact) from the two applications.

I appreciate all your work and I'm not questioning your programming skills ... I guess I'm just **** about understanding how the numbers are derived.

I like to be able to reproduce the results.

Cheers and Thanks again.

virusakos

It's good to know how the numbers are derived if you are interested to know.
I'm just not the right person to provide the answer

IOANNIStsa

My app is based on mazda compression diagram …



… and the cropped (zoomed) picture below show how I “read” the values after putting specific gridlines over the compression diagram picture

Emery_

iTrader: (8)

Are those the actual numbers Mazda goes by? And how current is that graph? If you even know, I'm just curious.

9krpmrx8

iTrader: (46)

Bump.

http://www.flickr.com/photos/9krpmrx8/10301400945/

virusakos

I will check it out.