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  #21  
Old 07-30-2019, 09:16 PM
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You talk about ARM processor based MCUs?
take a look at the Arduino Due
there are a few Arduinos with ST MCUs (three or four IIRC.. the due is the 'biggest' of them)
But they have downsides compared to ATMegas ...
(which I think you refer to as Arduino since that's what's on most Arduinos)
Hardware PWM and analog I/Os for example
So you need quite a few expanders slowing everything down again thanks to chip to chip communication..

That's what I was talking about btw:
either the due throwing lots of cpu power at it
or (which I personally prefere)
a fixed injection map and a raw data lookup table should do fine for 15k rpm on a single cylinder.
Since I think I have a very clean and precise way of getting there (with just an atmega)
different project.. wrong place, wrong time ..
As I said, let's cross that bridge when we get there.

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  #22  
Old 08-02-2019, 07:25 PM
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There are two Arduino-based EFI controllers that I know of. One is the nanoEFI. It is still in development and based on the Arduino Uno/ATmega328P. It is geared toward powersports engines with low cylinder counts.

The other is Speeduino. It is in production and based on the Arduino Mega/ATmega 2560. Sadly, this one started as a 328P-based ECU (called kartduino) that was even simpler than the nanoEFI. Feature creep turned it into an expensive system trying (why?) to compete with the likes of MegaSquirt, which is a vastly more established system based on Motorola/Freescale/NXP precessors. The creator of Speeduino took down all information pertaining to kartduino even though it wouldn't compete with Speeduino.
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  #23  
Old 08-02-2019, 07:45 PM
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nanoEFI is closed source...
speeduino is not
you can look into the sources and remove all "bonus material" again
remap pins where needed and maybe adjust a few things to match 328p needs.
tedious I admit, but certainly possible.

You could also just dig down deep in the oceans of them interwebs and uncover a kartduino source code that runs on a 328p off the shelf.

As soon as you start tinkering with that I'd be happy to share whatever I learned from my current (not too closely related) projects

'sid

[EDIT]
Something you might want to take a look at:
http://sourceforge.net/projects/arduems/
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Last edited by itsid; 08-03-2019 at 09:05 AM.
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  #24  
Old 08-03-2019, 11:04 AM
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After some further testing, the small pump proved to be too much for the turbo. I will need to figure out a bypass.
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Old 08-04-2019, 06:07 AM
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I got myself some air regulator valves for cheap off ebay the other .. uhm month ...[china shipping]
They're terribly small for your application, but I think something alike and a T connector
could serve you well at least for testing..
But IDK how reliably such setup would be over a wide range of pump speed.

How about an electric pump instead, you can read the rpm signal and regulate the pump speed electronically...
I bet you have a spare nano laying around somewhere
Bonus points:
you can use the same pump just add a motor/controller to power it

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  #26  
Old 08-04-2019, 01:30 PM
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Got a 1/8" needle valve , an AN4 T fitting , a couple of 1/8" to AN4 adapters and some straight AN4 fittings on the way .

Basically it will go like this :

Engine sump -> Radiator -> Pump -> T-Fitting -> Turbo -> Crankcase

On the T-Fitting i will add the needle valve , to basically act as a bypass , and the oil that returns back thru the bypass and not thru the turbo i will drain in the valve cover , so it can get some lubriaction to the top end . The turbo will use the oil sensor hole with an AN10 size hose to drain directly into the crankcase.
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  #27  
Old 08-09-2019, 02:37 AM
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Wastegate actuator arrived...
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  #28  
Old 08-15-2019, 06:46 AM
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Some progress... Well maybe not progress but planning at least
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