Pete
Just following up on the rotec possibility.
Rotec specifically states that the device must be placed upstream of a
turbo. This could be adapted to my engine in a similar
fashion/configuration to the aerovee turbo installation (
http://www.aeroconversions.com/products/aerovee/turbo.html) ie it would
draw through the turbo into the airbox and thence to the
manifold/cylinders. There would therefore be no issue of airbox/fuel
pressure.
It seems that there are advantages
- No airbox pressure/fuel pressure issue,
- Simpler fuel system one cable no balancing, single fuel feed from fuel
pressure regulator.
- lighter (throttle body, turbo, manifold).
- Possibly more power
- possibility of leaning in Cruise.
The disadvantages
- however there is the issue of carb ice when the throttle body is
before the turbo which is something I dont have to contend with as it is.
Do you know anything about this option?
thanks Will
William Daniell
LONGPORT
+57 310 295 0744
On Mon, Dec 25, 2017 at 9:13 AM, Pete <peterz@zutrasoft.com> wrote:
> Sounds like a very nice implementation! Great job you guys!
>
> At what level of boost do you start running into issues
> (preignition/overheating/twisted crank etc)?
>
> I wonder if the very nicely executed rotec sprayer, with its built in
> internal regulator (should work beautifully in a blow-through configuration
> as long as the supply fuel pressure is greater than the airbox press.).
>
> https://www.rotecaerosport.com/tbi
>
> Very high quality machined piece, with some nice features, better
> atomization, much simpler than those horrible bings etc.
>
> Cheers!
> Pete
>
>
> On Dec 25, 2017, at 8:46 AM, William Daniell <wdaniell.longport@gmail.com>
> wrote:
>
> Pete,
>
> this is a colombian adaptation for a 80hp 912. The Colombians claim that
> they turbo'd the 912 before rotax which might be true given the
> topography. Truth is wierder than fiction in Colombia. Or it might not.
>
> My guy makes the exhaust system. It has a small truck turbo (doesnt
> really matter which) controlled by a vernier. A garret might be better but
> it works fine as it it. My Savannah has a mitsuibishi turbo and my Europa
> has an IVECO turbo. He also made the airbox and put in the oil supply and
> scavenge for the turbo. You need a 914 fuel regulator.
>
> The turbo is in the same place as the 914 turbo.
>
> You need to fit the pressure normalizing tubes between the airbox and the
> carbs and fit bigger main jets so it runs cooler. You need to tighten
> the clamps on the carb rubber too. You need nitrile gaskets for the carb
> bowls. There's some fun stuff in it too. There is a ball valve on the
> oil inlet to the turbo which which stops the oil leaking out through the
> turbo when the engine is shut down. This ball valve is always held in
> place with the ball point pen spring.
>
> The system uses the mechanical fuel pump from the 912 and an electric pump
> which means that if you have an electrical failure the engine doesnt stop.
> My engine will run at about 28" without the electric pump.
>
> And that's about it. The net result is a turbo normalized 912 for less
> than USD25k. I run mine at 33" unless I have a heavy nephew on board.
> Yesterday we took off at 35".
>
> Its pretty simple and the manual wastegate doesn't really complicate
> things. You can control power with the wastegate or the throttle. I am
> comfortable with this because I have been flying with one for 10 years now
> in my Savannah. And in the worst case with no turbo and no electrical
> system you still have a 912. You can see photos at
> https://sites.google.com/site/europaconstructionwd/
>
> Will
>
> On Dec 25, 2017 07:52, "Pete" <peterz@zutrasoft.com> wrote:
>
>>
>> Happy holidays Will!
>>
>> "912 turbo" aftermarket? (Can we have more info?) or 914 turbo?
>>
>> Cheers and thx,
>> Pete :)
>>
>> > On Dec 25, 2017, at 7:11 AM, William Daniell <
>> wdaniell.longport@gmail.com> wrote:
>> >
>> > Yesterday I took off with my nephew who 220lbs, I'm 198 with full fuel
>> making us 16lbs over mtow.
>> >
>> > .......and the density altitude at skgy (8500) was just under 10k. We
>> climbed at 400/min to 10500.
>> >
>> > It is a remarkable machine.
>> >
>> > Happy holidays to all
>> >
>> > Will
>> > HJ460
>> > Tri 912 turbo airmaster
>>
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