flyrotary@lancaironline.net Mailing List Archive

In relation to processors memory life cycle. Probably a useful question might be - What are we seeing as far as numbers of older ecu controlled cars dying by the side of the road.

Certainly some memory technology has shorter life cycles but I don't think that is a significant risk in the PIC processors and code implementation that Tracy used.

Could it be that the removal process and flexing of pcb’s could induce more risk of failure.

Steve Izett.

On 28 Jan 2022, at 10:32 pm, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:

OK, so it's probably not the plugs. I've been searching the archive to find the recommended colder plugs. There's talk about NGK-10, whatever that is and also Autolite AR2592 and BR10EIX but still not sure what the longest lasting ones are.

Haven't really heard that flash ROM and RAM would go bad over time.
If you do decide to burn new chips, do it by copying the old chips. Don't know if you can also copy over the EEPROM data too (tuning data). But that would save you from having to retune everything. Cost of chips and PICKit 2 or 3 should still be well under $100. I still don't know if Microchip provides a service where you send in chips and they duplicate them.

Finn

On 1/27/2022 11:23 PM, Dennis Haverlah clouduster@austin.rr.com wrote:
Hi Finn

I am using NGK plugs RE7C-L 6700 and RE9B-T 6701. I use unleaded 87 Octane car gas – alcohol but no lead and normally go 100 – 150 hours on a set of plugs. The current plugs were installed about 15 hours ago.

My EC-2 controller is about 20 years old. My son-in-law Brayton Hackbarth and I are considering burning new A and B chips because RAM and flash ROM doesn’t last forever. What do you think of this? We estimate cost to be about $250-$300 total.

Per Jeff Whaley - we are also going to check to make sure the A & B chips are completely inserted in the sockets.

We will look for any cracks on the circuit board traces also.

Dennis Havelah

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From: Finn Lassen finn.lassen@verizon.net
Sent: Wednesday, January 26, 2022 9:28 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: One Rotor on my RX-8 engine may quit firingvery intermittantly

Which plugs are you using and how many hours on them?

Finn

On 1/26/2022 9:17 PM, Dennis Haverlah clouduster@austin.rr.com wrote:
I have an RX-8 in my RV-7a with Tracy’s EC-2 and EM-2. Recently while cruising the engine lost some power and went into a rough mode. It only lasted about 2 seconds and returned to smooth running as soon as I switched to the B controller. I landed and have been running it on the ground to determine the cause. It has occurred 3 or 4 more times and only lasts seconds. I believe I have determined that one rotor quits firing when it runs rough.

Has anyone else experienced this problem and is there a fix?

Thanks
Dennis Haverlah

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