Electronic Fuel Injection

[ZuluBen]

Nice Rael!

Oil pressure is spot on. Read the SL about the oil pressure and the spring replacement, yours now have the new one installed. Bearings happy all the way down to 1 bar

Oil temp normally runs a bit high after a rebuild, keep an eye on it, and use a higher speed and a bit of a lower power setting on the climb outs to control this.

I cruise climb at 95kts indicated in the summer. You want the temps just over 100 in the climb and just under 100 in the cruise.

Definitely rich looking at the EGT's and the Fuel flow.

Well done.

[BigglesSA]

Ben an oil pressure of 1 to 2 bar will have my attention in the cruise at 3000 RPM. SB figures of 2.7 bar comes from the new high leak lifters happy place figure. I will thus not want it any lower than 2.5 bar (constant) in the cruise. I actually enjoy seeing pressure on the dail of closer to 4 bar but will compromise the lifter happy place! Oil temp works for me at a constant 80 degrees. But that is just me, and Merc, and BMW, and Audi, and VW and and and..... I battled low oil temps for a long time (64 in the cruise, sometimes lower) until I discovered ductape. This helped until I got lazy, now the TOCA does it all!

[ZuluBen]

Len set the oil pressure on my engine at 2.2.

When I questioned him, he said that was fine, all the way down to 1 bar for limited run time.

Modern car engines need high pressures to get to all the critical areas. By comparison the Jab engine is old tech design for the sake or simplicity and reliability.

[BigglesSA]

Len set the oil pressure on my engine at 2.2.

When I questioned him, he said that was fine, all the way down to 1 bar for limited run time.

Modern car engines need high pressures to get to all the critical areas. By comparison the Jab engine is old tech design for the sake or simplicity and reliability.

Agreed, I always say that it is a close resemblance of a Lister if you start looking at clearances etc. Even so I would not cruise 3000 RPM below 2.7 bar but that's just me.

[checkride]

Sent Len all my screen shots then spoke to the man . He is very happy with what I sent him in fact his only comment was he would like to see a higher EGT . So we will re_map the engine after a bit more running time , we know it's rich right now . I asked him about the oil pressure no issues . We we have been given the go ahead did 1.5 hrs today will post all the screen shots later but engine is running very sweet idles at 600 rpm so smooth you can put a glass on the casing

[checkride]

4174 and 4180 is set to about 30% lean side look at the control knob bottom left , centre is 0. Engine definitely needs to be re-mapped. EGT are still a bit low for cruise power, but we will get there want to put a few more hrs on the engine before we map again. Plus my damn rigging is out , plane has a slight bank to port will do the necessary adjustments tomorrow. Sorry and the rudder my boy is complaining his right thigh is bigger than the left, Im sure i can correct that to make his left thigh work a bit so what you think a trim tab or just adjustment....remember I'm the innovator..

[checkride]

These are climb tests and also some aggressive leaning out of the engine, we really need to map the engine soon . Done 6.5 hrs since re-build starting to loosen up a bit. Some of these scree shot are climb tests as well. Looks good so far.

[scsirob]

Jabiru released a new installation manual JEM3302-6 on October 1st. It's great to see that you have your instruments set for Celsius, as in the new manual, EGT values have gone up by 20 degrees C. Section 1.5.7 claims EGT max is now 740C, in cruise 700C is good.

Oddly enough, in Fahrenheit they stayed the same...

[BigglesSA]

Thanks scsirob. I have not read it yet. Will this be across the board or only on certain engines like the roller cams?

[checkride]

Ok this I think will be the last on the engine.

Run is completed did the oil change yesterday, check plugs all good. Torqued the heads to 27 NM oddly found bolts #5 on cylinder 3, 5, 6 loose. Thats the bolt under the grub screw. Anyway all sorted with a calibrated torque wrench in case someone asks.

Engine run done all good no leaks. So as mentioned before need to re-map the engine but must wait for my son to get back from JHB before we do that maybe some cooler weather as well. In the meantime Donald will check the balancing on the prop again. Want to re-do the WB over the weekend as we balanced the elevator....remember but didn't do the WB.

After 20 months of running the new brakes and tires I need to rotate the tires a bit more wear on the insides. Terrible job as its tubeless and a huge mission. Brakes show 1mm wear in the pads I'm impressed with the Beringer Products.

till later

[ZuluBen]

thanks, good work!

[jetjr]

SDS now have individual trim and other programming upgrades like 100 rpm ajustments
Seems only for 4cyl though for trim
This should allow perfect egt spread

[checkride]

They do the six cylinder as well sending my cpu back sonit can be flashed for the upgrade very excited about being able to adjust each injector

[scsirob]

...Torqued the heads to 27 NM oddly found bolts #5 on cylinder 3, 5, 6 loose. Thats the bolt under the grub screw. Anyway all sorted with a calibrated torque wrench in case someone asks.

Do not want to rain on your parade, but that bolt is the first to go when the head tends to overheat and the aluminium goes soft. It is the hot spot, as it is nearest to the exhaust valve. Do not let this go by. It is a sign of the barrel sinking into the head, which causes the bolt tension to fade and eventualy a leak will develop there. It is a sign that you still have work to do on the cooling.

Rob

[jetjr]

They do the six cylinder as well sending my cpu back sonit can be flashed for the upgrade very excited about being able to adjust each injector

Thats great news
A game changer in my mind
very interested how you go