RX8 Compression Calculator for Android and iPhone/iPod
 

Dear all,

I've created a simple utility for Android for Renesis compression adjustment (based on previous work of teknics and IOANNIStsa).

Don't expect anything fancy though.
The utility is only useful for adjusting a compression, don't expect any rating such as IOANNIStsa's.

Here it is: https://market.android.com/details?i...tionapps.rx8cc

Cheers


Update:
The iPhone/iPod version has been approved by Apple and can be found here
http://itunes.apple.com/us/app/rx8-c...7863?ls=1&mt=8

What about iPhone? :(

Developing apps and having them pushed to the market for the iphone is like trying to pass a kidney stone. Sure, eventually it works out, but boy is it a painful process.

Already working on it, but as paimon.soror said, getting Apple's approval might be a painful process, so be patient and fingers crossed :)

It might be easier for you guys to go get Android phones.

you could just keep a pic of the OE diagram too, it's not like you will use it daily or anything and it's not exactly rocket science to reference the point quickly just by sight ...

but then I don't own an electric can opener either

my compression tester tells me my compression numbers and converts them to 250 rpm on the fly ... oh wait :)

I'm confused... what else is needed for this to work besides the app?

First let me say, I'm clueless on this process but...
What about if we are jailbroken and use cydia, wouldn't be easier to get it on their apps vs apple?


Either way, subbed.

Yep, unfortunately going through cydia you are losing a lot of public exposure from those who do not have jailbroken devices. Plus, once you have been targeted as developing unlicensed applications, good luck trying to license a product to sell through the apple store in the future.

^ That sucks.

For those of you that wanted an iPhone/iPod app, check first post for the link :)

@Leejin nothing else (if I understand your question). Apart from doing a compression test on your engine that is.

Cheers

Thank You Sir!

OOhhh... I understand now. It's a number converter. Gotcha. I thought it was adjusting the compression somehow on the engine itself. Haha... I need to read things better. X)

Thank you so much for creating this tool!!

Using PSI as the input values does not seem to be working for me on my Nexus running ICS

so... according to this calculator... my readings are out of spec. Not sure if I'm doing this right, so maybe someone can chime in for me. My readings were:

#1 @ 318 RPM
7.8, 7.2, 7.5

#2 @ 318 RPM
7.6, 7.5, 7.6

Sorry about that.
I will check it out.

Could you please send me a PM with the values you have tried?

Looks like all chambers in both rotors are below Mazda's minimum compression value.
If you don't have a warranty and your engine starts fine without issues, then no need for an action.
Enjoy your car :)

The bug with PSI adjustment has been fixed.

Many thanks to wcs for reporting the error.

I can't seem to find a way to delete the saved results.
Am I missing it?

No you are not missing it.
There is no functionality right now for deleting saved results in Android application.
It will be available in v1.3 (hopefully by the end of the next week).

Sweet!
Thanks for the fast reply.

edit---
Looking forward to the update as I'll be show casing your app at our meet.
I've got 10 rx8's to do compression tests on

https://www.rx8club.com/canada-forum-35/rx8-spring-meet-new-date-april-29th-2012-a-231580/page3/


edit edit ----
Any thoughts of adding altitude compensation? Or using the Nexus built-in barometric pressure sensor?

v1.3 with delete functionality is available on Google Play.

@wcs never thought about altitude compensation, but does it really matter? Does Mazda take into account altitude when evaluating a compression?

Sweet!

Ok ..... ummm does altitude matter
Well yes IMO and so does temperature, you could even say instead of altitude to use barometric pressure.

Does Mazda compensate for these things?
I'm sorry I don't know.

Here is the altitude compensation chart that I discovered doing research on other sites and from online "Engine Tech" books

https://www.rx8club.com/attachment.p...5&d=1333996865

I live at 1579 feet so I am interested in compensating for thinner atmosphere.

I'm also interested in how you actually calculate the "Normalized" compression value. Example when you have X psi value at Y rpm and you normalize it to 250 rpm.
It's obviously not a direct linear value as my numbers never seem the same as yours.


Great work man, love the app

Cheers