From: "Neil Unger 12348ung@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: ignition system
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Message-ID: <843b7b78-9d37-f963-df3d-310d4ac3e196@gmail.com>
Date: Mon, 17 Sep 2018 16:52:45 +1000
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Yeah, still want to advance timing.  Really only need 3 speed settings,  
Idle -- does not matter really.  Then full power and cruise speed are 
the two that matter.  I am having all sports of grief with Fuel Tech 
having spent  $4000 AUD on it.  It is good but as always complicated.  A 
carby plus simple ignition will do. The Rotec carby for $800 is so 
simple and runs on 5 PSI.  Trigger wheel would be a reasonably simple 
change.


On 9/17/2018 11:26 AM, Charlie England ceengland7@gmail.com wrote:
> On 9/16/2018 7:33 PM, Charlie England ceengland7@gmail.com wrote:
>> On 9/16/2018 4:35 PM, Neil Unger 12348ung@gmail.com wrote:
>>> Gents,
>>>
>>>                   The cost of an ECU is around the $3000 plus 
>>> possibly $4000 with a few fittings, which is substantial.  To 
>>> simplify things a standard carby with a basic ignition systems would 
>>> take a lot of money from the project.  What alternatives are there 
>>> for a simple cheap ignition system to replace an ECU?
>>>
>>> Neil Unger.
>> Are you willing to change the trigger wheel? You could look at the 
>> Mega Jolt (ignition only). It requires a 36-1 wheel, like Ford uses 
>> here in the USA (might be the same down under).
>>
>> If you're interested in alternatives in full injection/ignition 
>> controllers, the Micro Squirt & Mega Squirt systems can both be set 
>> up for a rotary. Micro Squirt will have batch fired injectors (like 
>> almost all aftermarket systems for aviation engines). Mega Squirt can 
>> be set up just about any way you can dream up.
>>
>> The Micro Squirt controller with harness is about $400 US. The Mega 
>> Squirt controller is about $600 US.
>>
>> The car guys love them. Here's a link to an RX-7 forum page on the 
>> Mega Squirt:
>> https://www.rx7club.com/megasquirt-forum-153/
>>
>> Charlie
> Oops; forgot. Len Hanover has published a method using just a couple 
> of trigger detectors and (IIRC) Chrysler ignition modules. Same can be 
> done with GM HEI modules. Downside is fixed timing.
>
> Charlie
>
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