CRF 250 autotune (arduino) (updated)

Harbo776
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Harbo776
A while ago i posted a question about a DIY autotune arduino.
http://www.vitalmx.com/forums/Race-Shop,42/CRF-250-autotune-arduino,130…

I case anyone is interested here is a update on the progress so fare.

I have figured out the rpm, TPS and MAP reading. Got a video of it running.
https://youtu.be/jaZPssPkVIo

The LCD is updating a bit to slow.
Will bring it up from 1 time pr sek to 5 times a sek.

The TPS calculation isn't adjusted yet.

Haven't bought the o2 sensor yet. Planing on ordering it soon. Wanted to be sure I could read the TPS and MAP with out interfering the the ECU.

This is the sensor i want to use.
http://www.14point7.com/products/slc-free

It has a small form factor, lsu 4.9 and is cheap.

Once i have the o2 sensor working, I will build a suited box for it all.
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WileCyot
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WileCyot 1/22/2017 10:04pm
1/22/2017 10:04pm
Following. GET has exactly what you're trying to do built into their ECUs. I love my GET.
MxKing809
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MxKing809 1/23/2017 6:37pm
1/23/2017 6:37pm Edited Date/Time 1/23/2017 6:40pm
Can you post up your wiring schematic for the RPM pick up? I want to use my Arduino and a dip switch with 15 or so resistor readings to program preset RPM milestones for starts.

I was thinking 7k-15k RPM range in 500 increments on the switch, so you can fine tune the optimal range you want to hit per condition/soil type/etc. Once you set the RPM threshold it would trigger a LED showing you're in the 100 +/- range for the start. I just need to figure out my pickup code and wiring and it should be pretty simple from there.

I just have NO idea how to code lol. My brother in law is a experimental engineer for GM and tinkers with them daily so I've been bugging him for help.
Harbo776
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Harbo776 1/24/2017 2:26pm
1/24/2017 2:26pm
I want to make a tool that can be fittet to different brands, just by changing the wirring harness. That i why i build my own.

I can send you my code and the semantics. The code i simple enough. The wirring of the Monostable circuit i borrow on the Internet. The code has comments in danish. Just need to translate that and then they heading your way.
WileCyot
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WileCyot 1/24/2017 2:30pm
1/24/2017 2:30pm
Harbo776 wrote:
I want to make a tool that can be fittet to different brands, just by changing the wirring harness. That i why i build my own...
I want to make a tool that can be fittet to different brands, just by changing the wirring harness. That i why i build my own.

I can send you my code and the semantics. The code i simple enough. The wirring of the Monostable circuit i borrow on the Internet. The code has comments in danish. Just need to translate that and then they heading your way.
Yeah, that's exactly what GET does. Anyway, good learning project. Microsquirt would a been cheaper...

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Harbo776
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Harbo776 1/24/2017 2:37pm
1/24/2017 2:37pm
That looks cool. Sucks i didn't see that before. Anyway, as you said. Great learning experience.

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