DIY tuning/remapping with mazdaEdit and Openport

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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by Phil Bate » Tue Sep 01, 2015 11:35 pm

Sorry Carl, I haven't been able to put any of those together. I'll try to describe the load max table though:

Calculated load max. is a table that depicts the maximum load the engine can achieve at a given RPM, and the calculated load is then expressed as a percentage of this. If your engine has been ported and so is suddenly drawing in more air (has a higher VE) at 6K and 7-8K, the calculated load pegs at 100% too early - the engine can do more than the PCM expects. You can adjust the table to more accurately represent the abilities of the engine, getting the calculated load to just skim 100% instead of whack against it and remain there through the revs. This obviously plays a much bigger part in FI tuning, where you can see loads up to several hundred percent, and would be done in conjunction with adjusting the fuel and advance tables. It's a finicky concept and hard to describe in black and white, so I will give some thought to writing a full explanation when I have time.



In the mean time, I have been playing with the dwell table lately. I am writing new D585 and 969 maps from scratch, with bias for the torque curve of the Renesis and some throttling-back to keep the winding temperatures down where maximum spark energy is seldom needed. Here's a look at some values I have been using to test some theories:
dwell_mo.png
(Warning - don't try to use these values as they are meant to stress the coils at certain points)

The blue highlighted part is the 14V (normal running) curve and shows how I've set the dwell to peak at the greatest torque RPM area (for a street ported 231). It's going well so far and I may have gained some reliability at cranking and idle RPM. I will update after more testing :)
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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by MadTaz » Wed Sep 02, 2015 3:29 pm

Phil Bate wrote:Sorry Carl, I haven't been able to put any of those together. I'll try to describe the load max table though:

Calculated load max. is a table that depicts the maximum load the engine can achieve at a given RPM, and the calculated load is then expressed as a percentage of this. If your engine has been ported and so is suddenly drawing in more air (has a higher VE) at 6K and 7-8K, the calculated load pegs at 100% too early - the engine can do more than the PCM expects. You can adjust the table to more accurately represent the abilities of the engine, getting the calculated load to just skim 100% instead of whack against it and remain there through the revs. This obviously plays a much bigger part in FI tuning, where you can see loads up to several hundred percent, and would be done in conjunction with adjusting the fuel and advance tables. It's a finicky concept and hard to describe in black and white, so I will give some thought to writing a full explanation when I have time.

Cheers phil a good walk through would be fantastic :thumleft:

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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by MadTaz » Sun Sep 27, 2015 9:47 am

Has anyone upgraded to windows 10? Is the ME software compatible and is their any licence issues?

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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by DanBass » Sun Sep 27, 2015 10:36 am

I believe Phils using a Windows 10 tablet at the moment, so presumably it works fine :)


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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by MadTaz » Sun Sep 27, 2015 6:12 pm

Cheers Dan, I have upgraded. Seems to open fine have not tried to connect to the car yet though

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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by Phil Bate » Sun Sep 27, 2015 11:20 pm

Yes it appears to run just fine on Windows 10 including running the Openport - in fact I was just outside putting another flash on the car:
WP_20150927_22_52_32_Pro.jpg
WP_20150927_22_57_40_Pro.jpg
This is the way forward - I make edits to the ROMs on my desktop with the nice big screen, and save them to my OneDrive. That way they are instantly available on the tablet to take out to the car and flash. No different to how I did it before except it's much easier to carry a 10" tablet around than a laptop :)
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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by brix79 » Mon Sep 28, 2015 12:44 am

It could be said you like a bit of Microsoft Phil.. ;)
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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by casey » Mon Sep 28, 2015 8:27 am

I didn't spot the computers, just the bottle of Peroni :D
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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by MadTaz » Mon Sep 28, 2015 8:03 pm

Was that the guilty Peroni taking up valuable 2T space? [-X

Nice set up there phil! You have me thinking now :-k

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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by DanBass » Mon Sep 28, 2015 8:56 pm

I wouldn't bet on it, that will be long gone :)


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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by brix79 » Mon Sep 28, 2015 11:14 pm

Hehe, I'd have been surprised if there wasn't a beer in shot somewhere.. ;)
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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by ChrisHolmes » Mon Sep 28, 2015 11:24 pm

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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by Jimbob35 » Tue Jan 05, 2016 1:44 pm

Im curious! I fancy having a go at this, currently play with engine files on Deutz tractors but the opportunity to tweak the RX is tempting! Anybody keen to demonstrate it?

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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by geordie9809 » Wed Jan 06, 2016 1:21 pm

Jimbob35 wrote:Im curious! I fancy having a go at this, currently play with engine files on Deutz tractors but the opportunity to tweak the RX is tempting! Anybody keen to demonstrate it?
I have a Cobb Accesport ill upload a few pictures later of how it works
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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by Jimbob35 » Wed Jan 06, 2016 7:56 pm

Coolio

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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by geordie9809 » Sat Jan 09, 2016 5:19 pm

idlespeed.jpg
dwell timings.jpg
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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by 13Black » Mon Apr 18, 2016 11:13 pm

Has anyone had a play with the rev limit? There's much talk and not much walk when it comes to how much the stock engine and gearbox can take when it comes to rpms.
Of course it will accelerate wear - how exponential that graph would look though, I'm sure no one really knows. For the occasional blip up to 10,000rpm during autotests or sprints I expect it to be immeasurably small.

Is it as simple as just putting a new figure into the Rev Limit box or would you/could you create a new fuel map that gives the ECU new AFR targets up to 10,000rpm?
It wouldn't surprise me if the ECU just either extrapolates it outside the map or just assumes the engine is revving at 9,000 rpm at 111% VE (or whatever it would be) based of MAF readings and therefore fuel fairly correctly... given how rich the stock map is at 9,000 WOT.

Thoughts? Empirical info?
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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by Phil Bate » Mon Apr 18, 2016 11:52 pm

The PCM does indeed extrapolate once the plot falls off-axis. This can cause problems however as the extrapolated values, being based on the previous trend, can be less than optimal. You can re-scale the axis to tune for the higher RPM areas but you lose some resolution - not a massive issue.

On a standard engine there is no point as the power drops off pretty quickly - you are much better off grabbing the next gear. Ported engines may see some advantage and yes, you simply enter a new rev limit in the box. However, hearing the racket coming from the gearbox at around 9K when a short-shifter is fitted I wouldn't recommend it. This is apparently a common observation with short shifters but I don't know if this is due to an engine balance issue or the gearbox itself.
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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by 13Black » Tue Apr 19, 2016 12:11 am

One day Phil, one day someone will ask you something and you won't know the answer.

Today hasn't been that day.

Thanks dude.
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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by Phil Bate » Tue Apr 19, 2016 12:16 am

It does happen quite a bit, I just have to go and look it up when it does :)
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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by ChocolateTeapot » Tue Apr 19, 2016 8:32 am

Agreed, the SS noise is almost enough to stop you wanting to beep... Almost.
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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by Rotary Revs » Tue Apr 19, 2016 12:01 pm

It's not generally recommended that you just crank up the RPM limit past 9k, bear in mind that's incredibly high for a factory car and required a new level of balancing (which was made slightly easier with improved manufacturing techniques! It's do-able on engine's built for the purpose but stock renisis engines fall on their face around 8k anyway so you're not going to gain anything. :)

If you're really wanting to build an NA screamer 10k is achievable but you need to port sufficiently to allow it to breath up there and balance the rotating assembly.
If you want to go past 10k you need to modify the gears in the rotors to take a circlip, change the oil jets in the E-shaft so that you have enough flow to the bearings and realistically intake and exhaust p-ports to keep it breathing. These engine's shouldn't idle below 3-4k mind so not the kind of thing you would want as a daily!

If you wanted to though you would need incredibly deep pockets and not just to build it but maintain it as well. When strip down's become services you know you're in a very exotic and exclusive club ;)
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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by innerlurken » Fri Jul 29, 2016 4:34 pm

Phil Bate wrote:Sorry Carl, I haven't been able to put any of those together. I'll try to describe the load max table though:

Calculated load max. is a table that depicts the maximum load the engine can achieve at a given RPM, and the calculated load is then expressed as a percentage of this. If your engine has been ported and so is suddenly drawing in more air (has a higher VE) at 6K and 7-8K, the calculated load pegs at 100% too early - the engine can do more than the PCM expects. You can adjust the table to more accurately represent the abilities of the engine, getting the calculated load to just skim 100% instead of whack against it and remain there through the revs. This obviously plays a much bigger part in FI tuning, where you can see loads up to several hundred percent, and would be done in conjunction with adjusting the fuel and advance tables. It's a finicky concept and hard to describe in black and white, so I will give some thought to writing a full explanation when I have time.



In the mean time, I have been playing with the dwell table lately. I am writing new D585 and 969 maps from scratch, with bias for the torque curve of the Renesis and some throttling-back to keep the winding temperatures down where maximum spark energy is seldom needed. Here's a look at some values I have been using to test some theories:
dwell_mo.png
(Warning - don't try to use these values as they are meant to stress the coils at certain points)

The blue highlighted part is the 14V (normal running) curve and shows how I've set the dwell to peak at the greatest torque RPM area (for a street ported 231). It's going well so far and I may have gained some reliability at cranking and idle RPM. I will update after more testing :)
Did you ever get any further with this?

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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by Phil Bate » Sat Jul 30, 2016 1:36 pm

Which bit, the dwell curve?
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Re: DIY tuning/remapping with mazdaEdit and Openport

Post by innerlurken » Sat Jul 30, 2016 2:12 pm

ah sorry, yes the dwell settings. Now i have a working engine again im getting back into this

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