IO-540 Ignition Options

[rv6ejguy]

Originally Posted by RV10inOz

Areed Ross, the power stays pretty much the same and in the case of advance, it reduces power after a few extra degrees due to the work required to compress an expanding gas.

As for the magneto, no that is the opposite of what I was saying. The magneto is far less accurate, and that may be a good thing. The actual spark firing is nothing like what is set up in a static timing test, the actual spar event happens much later.

The spark occurs exactly when the spark occurs. You could say the ignition event also happens pretty much simultaneously. The combustion process takes a lot more time relatively speaking. In the end, we want PCP to occur 18-22 degrees ATDC. We do want accuracy of spark event to ensure PCP happens at a predictable place in the crank rotation cycle. Pressure plots also show that no 2 firing cycles are the same.

[RV10inOz]

Ross, you are getting warm now. I know you are onto it.

The variation with a magneto is greater (less accurate) combined with the cycle to cycle variability this may have a longevity benefit.

Watching pressure traces in real time and being able to switch from one to the other instantly is truly enlightening. The EI systems bring things far closer aligned most of the time.

[paul330]

Originally Posted by J Twilbeck

Just spoke with E-Mag (they don't make emags anymore only pmags) and they plan on debuting the six cylinder pmag at Sun N Fun this year (2013). So we'll see!

So, anyone any news? Or are we still turning blue holding our breath........?

[JDanno]

Originally Posted by Mike S

Mags.

Mags with G3 ignition modification.

Lasar mags.

Lightspeed. One or two-------your choice.

EFII has a 6 cyl unit in production IIRC.

As far as I know, Pmag is still vapor......would be nice it they actually go into production.

Barrett had an electronic ignition in the works, dont know the current status, you need to check with them.

Jeff Rose-----dont know if they do a 6 cyl or not.

Simple Digital Systems, I think they offer a 6 cyl. Seem to remember that this is the ignition side of EFII??

All I can think of at the moment.

I talked with Rhonda at Barrett Precision Engines on Monday and she said that since her father had to retire with health problems last year there hasn't been much work done on their electronic ignition project. It'll happen eventually.....or maybe not. I'm getting an engine from them late this month for my -10 but they have no option for ignition of their own.

[JDanno]

I asked my friend to look at all the options for E-ignitions while he was at Sun-n-Fun. As I understand it, Emag said they would have their product out at Oshkosh this year.

[paul330]

Originally Posted by JDanno

I asked my friend to look at all the options for E-ignitions while he was at Sun-n-Fun. As I understand it, Emag said they would have their product out at Oshkosh this year.

Yeah, right...........

I am rapidly losing faith with Emag and starting to look at other options. As Mike Starkey said "breath holding not recommended".

[paul330]

Here is a recent email exchange I have had with EmagAir:

Hi Brad, me again......

There were rumours that the P200 would be released at S&F but it has been and gone with no announcement.

I understand the "commercial in confidence" aspect but I think you owe it to all of us who have been waiting patiently for best part of 2 years to let us know exactly what the problem is with the P200. Is it simply a matter of certification paperwork (if that is the way you are going) or is there some almost insurmountable problem? I have heard that the 6 cylinder requires a 1.5:1 gearing which is problematic - is that where the issue is?

Please give us some information we can work with other than "we expect it in 2-3 months". If you are not going to produce this thing then I will think again and move on

Regards

Paul



Hi Paul:

I was planning on taking a working 6 cylinder (Series 200) to Sun N Fun. So ?I? was the one who started the rumor. I took a display version of the six to the show as Tom needed the working models at the shop to continue testing. You are quite right, it?s taken quite a while to get to this point and customers have been more than patient. If people need to move on without us, it will be our loss and I fully understand. We are quite committed to the series 200 and equally committed to getting it right. It remains a very high priority for us.

The engineer has not released it for production as yet.

Kindest Regards,

Brad Dement


Nice and polite but all very unsatisfactory. It's moved from giving estimates to "we are committed" and "high priority". I can't help feeling there is some fundamental, insurmountable problem and the whole thing is going to end up getting canned...........

[paul330]

So, anyone heard any more rumours about the P200 at Oshkosh? Anyone taking bets?

[ajay]

Robert,

Any performance data on six-cylinder? How many test cases? How easy is it to install?

Andy

Originally Posted by rcpaisley

Hi Lee,
We don't have all our part numbers on the website.
(They will be soon

I will PM you with more info.
Robert

[rcpaisley]

Hi Andy,
I don't have specific performance data. However we seem to have a continual stream of customers that tell us that their engines run better and their cruise efficiency is improved. We can also tailor ignition curves for individual customer requirements. You also have the option to upgrade to include electronic fuel injection in the future if you choose. Installation is pretty basic.

Robert