Pete,
People run these engines all the way up to 39". I run mine at 33" when I'm
alone and when at MTOW Ill take it to 35" for about 10 mins and then back
off to 30". So far, well within term limits. I haven't seen more than
220F oil temp at the max is 255F.
We all use 100ll because the mogas is poor quality and does cause
detonation.
As we all understand it, the 914 uses the same main block as the 912 -
essentially it's the same engine. So there are no issues with handling the
power.
BTW You can not use a 912S because the compression is too high.
So far we have stuck with the bings but I will have a look at the rotec
option.
If anyone wants to have a go at this Id be delighted to help. We can get
the parts made up here and Ill take them to the US on one of my trips and
DHL them.
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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