Even with the rule changes, the aixro has all but disappeared from the UAS series. With only one racer listing an aixro as their primary engine in the 2016 final point standings. With the favored engine choice being large displacement mx/speedway engines, the best karting specific engine (opinionated) needs a little help getting back into the competitive scene. In stock configuration, the wankel puts out a modest 48hp, so let's see what we can do to get it closer to all the 80hp figures I hear the 250's and 500's put out. The supercharged efi aixro that was buily by parajet to fly over everest apparently put out around 90hp. There are also rumors of a turbo efi wankel running around Australia, which the builders claim makes 89hp at only 5000rpm (but no real proof, http://www.kartsportnews.com/c16/feat-motorexpo2016.html ).
In both of the previously mentioned examples, EFI was a common factor. Probably due to the fact that it will be much easier to tune than a carb, especially with boost added into the equation. So instead of looking for a complete COTS solution i'm taking the long way around and building my own system. Thankfully there is an extremely versatile ECU with a tiny foot print (less than 5 inches wide), with a wide range of capabilities. Which is microsquirt. With microsquirt, you must wire your own harness, calibrate your sensors, create the fuel table (AFR based or open-loop), and so on. Not exactly plug an play. Tuning will be done with TunerStudio. Free software with a lot of features and support for a wankel.
Ideally I want match the performance of the dual methanol carbs, which we have been running successively for over 3 years. Then once the EFI is proven, add a turbo. I even put a picture of the engine's seals after 3 seasons of methanol in the link below for anyone who still thinks it hurts these engines. Seals and rotor look like new.
Update:
- harness wired with temporary connections (quick and ugly)
- wideband (tested with my old outlander, idles at stoich of 14.7), TPS, IAT, CLT wired and calibrated
- MAP working but not yet calibrated (may need a sensor with known voltage ranges)
remaining:
- weld bungs for IAT and wideband
- hook up fuel system
- tach signal for ecu (may have to ditch the stock ignition and make my own)
- tuning
If anyone would like to know, I can list the parts used thus far.
Photos:
https://goo.gl/photos/Fe2tbYCtUEkWiVW8A
In both of the previously mentioned examples, EFI was a common factor. Probably due to the fact that it will be much easier to tune than a carb, especially with boost added into the equation. So instead of looking for a complete COTS solution i'm taking the long way around and building my own system. Thankfully there is an extremely versatile ECU with a tiny foot print (less than 5 inches wide), with a wide range of capabilities. Which is microsquirt. With microsquirt, you must wire your own harness, calibrate your sensors, create the fuel table (AFR based or open-loop), and so on. Not exactly plug an play. Tuning will be done with TunerStudio. Free software with a lot of features and support for a wankel.
Ideally I want match the performance of the dual methanol carbs, which we have been running successively for over 3 years. Then once the EFI is proven, add a turbo. I even put a picture of the engine's seals after 3 seasons of methanol in the link below for anyone who still thinks it hurts these engines. Seals and rotor look like new.
Update:
- harness wired with temporary connections (quick and ugly)
- wideband (tested with my old outlander, idles at stoich of 14.7), TPS, IAT, CLT wired and calibrated
- MAP working but not yet calibrated (may need a sensor with known voltage ranges)
remaining:
- weld bungs for IAT and wideband
- hook up fuel system
- tach signal for ecu (may have to ditch the stock ignition and make my own)
- tuning
If anyone would like to know, I can list the parts used thus far.
Photos:
https://goo.gl/photos/Fe2tbYCtUEkWiVW8A
