electronic ignition conversion for magneto???

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SwirledWarII
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electronic ignition conversion for magneto???

Post by SwirledWarII »

Hello everyone, I am new here to Southern Airboat but have been running Airboats for 8 years, I've heard rumors about a guy that built a HEI conversion to replace the Magnetos. Has anyone heard such a thing or maybe something similiar that will replace the Magnetos? any info would be helpful thank you guys. Another question, I'm running a 220 gpu with dual mags conversion I purchased the boat 8 years ago when the engine had been completely gone through. Due to numerous deployments in the military I have only clocked 130 hours on the engine. last thursday I dropped my second valve seat the firstr was at about 80 hours. what causes this to happen and what can I do to prevent this from happening in the future? thank you, John.
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Re: electronic ignition conversion for magneto???

Post by Thunder200 »

Personal Message nastyboytwo on here. His brother has it on his s/v 0540 and loves it. Super nice guys. They will tell you all you need to know about it.
SwirledWarII
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Re: electronic ignition conversion for magneto???

Post by SwirledWarII »

Thank You!
bigworm470
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Re: electronic ignition conversion for magneto???

Post by bigworm470 »

Give Abner a call 561-686-6134 or Gary Armstong 561-722-8444 they will treat you right!
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In the Glades
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Re: electronic ignition conversion for magneto???

Post by In the Glades »

bigworm470 wrote:Give Abner a call 561-686-6134 or Gary Armstong 561-722-8444 they will treat you right!

Amen to that. The electronic ignition I've seen on Gary's motors is unreal.
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farmboy
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Re: electronic ignition conversion for magneto???

Post by farmboy »

bigworm470 wrote:Give Abner a call 561-686-6134 or Gary Armstong 561-722-8444 they will treat you right!
Those 2 guys there know there stuff and both top notch. I highly recommend them...
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B-White
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Re: electronic ignition conversion for magneto???

Post by B-White »

farmboy wrote:
bigworm470 wrote:Give Abner a call 561-686-6134 or Gary Armstong 561-722-8444 they will treat you right!
Those 2 guys there know there stuff and both top notch. I highly recommend them...
X 2 :thumbleft: :thumbleft:
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SwirledWarII
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Re: electronic ignition conversion for magneto???

Post by SwirledWarII »

Thank you all for the info! Another question if I may ask. since my engine was rebuilt I've only put about 130 hours on it (220 gpu with dual mag conversion standard cylinders and low compression) the problem is at about 80 hours it dropped a valve seat resulting in a cost of about 700.00 to fix one cylinder, now at 130 hrs last thursday It possibly dropped another valve seat but this time the piston hit it and make a knocking sound the oil pressure was at 60 and the oil temp was at 160. Can anyone tell me why this engine keeps droppin valves and or valve seats? and what can I do to prevent this from happening in the future? also can anyone tell me where to get some parts cause it looks like I will be needing a standard jug and or piston. thanks guys!
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farmboy
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Re: electronic ignition conversion for magneto???

Post by farmboy »

SwirledWarII wrote:Thank you all for the info! Another question if I may ask. since my engine was rebuilt I've only put about 130 hours on it (220 gpu with dual mag conversion standard cylinders and low compression) the problem is at about 80 hours it dropped a valve seat resulting in a cost of about 700.00 to fix one cylinder, now at 130 hrs last thursday It possibly dropped another valve seat but this time the piston hit it and make a knocking sound the oil pressure was at 60 and the oil temp was at 160. Can anyone tell me why this engine keeps droppin valves and or valve seats? and what can I do to prevent this from happening in the future? also can anyone tell me where to get some parts cause it looks like I will be needing a standard jug and or piston. thanks guys!
How hot is your cylinder head temp getting?
14ft JB Hull,Lycoming GSO480 w/water-meth injection,Sensenich 3-blade "R",ButtRaxx seats,B&S Trailer.

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SwirledWarII
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Re: electronic ignition conversion for magneto???

Post by SwirledWarII »

I'm not sure I don't think it is getting that hot but I've never actually checked to see the temp I was told to watch the oil temp? which if I'm by myself it only gets to about 130-140 with a loaded boat 4 persons gear and beer it gets to about 160 at the highest.
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Re: electronic ignition conversion for magneto???

Post by bradlist »

John,
There is so much out there you can do besides a magneto. Really much better alternatives do exist for those not traveling at 200 mph through the clouds. Aviation solutions could include expensive, but highly reliable products, key word search E-Mag P model, Light Speed Hall Effect sensor unit, Lasar System, Electroair, or FADEC system. On the do-it yourself end on the cheap, you may research using the Ford ECM control module. MSD 6A, or other HEI ignitions. Any electronic ignition that has some variable timing, mass airflow input, or spark timing knock sensor input, will provide a much smoother and longer running engine, with more predictable temperature and performance than a fixed timing, magneto fired engine. How wet you get may be a consideration as well. 2 cents worth at least. Brad
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Re: electronic ignition conversion for magneto???

Post by jinotown »

The valve seat problem is from high cylinder head temps. Never run those GPU's over 450 degrees, lower if possible. A cooling shroud is the best money spent for reliability. Abner uses a well proven system on the electronic conversions. Make sure to get the system with a MAP sensor. It adjusts the timing based on load and RPM, not just RPM.
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billybob
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Re: electronic ignition conversion for magneto???

Post by billybob »

What fuel are you running?
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SwirledWarII
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Re: electronic ignition conversion for magneto???

Post by SwirledWarII »

bradlist wrote:John,
There is so much out there you can do besides a magneto. Really much better alternatives do exist for those not traveling at 200 mph through the clouds. Aviation solutions could include expensive, but highly reliable products, key word search E-Mag P model, Light Speed Hall Effect sensor unit, Lasar System, Electroair, or FADEC system. On the do-it yourself end on the cheap, you may research using the Ford ECM control module. MSD 6A, or other HEI ignitions. Any electronic ignition that has some variable timing, mass airflow input, or spark timing knock sensor input, will provide a much smoother and longer running engine, with more predictable temperature and performance than a fixed timing, magneto fired engine. How wet you get may be a consideration as well. 2 cents worth at least. Brad






Thank you Brad I really appreciate all the info!! :thumbleft:
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In the Glades
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Re: electronic ignition conversion for magneto???

Post by In the Glades »

Are you running avgas?
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SwirledWarII
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Re: electronic ignition conversion for magneto???

Post by SwirledWarII »

In the Glades wrote:Are you running avgas?
87 unleaded with 2 large bottles of marvels mystery in the tank. I was told that since my engine was a "low compression" engine I could get by with 87 and I've been running that since break in. During break in I used avgas for the first 100 hours or so.
bradlist
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Re: electronic ignition conversion for magneto???

Post by bradlist »

On ebay right now there is a pair of brand new mags with the lasar setup for less than $150. 1 day left. Key word Slick magneto electronic ignition. Brad
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Re: electronic ignition conversion for magneto???

Post by southernrican »

I ran a electronic ignition from abner the Xdi with the map sensor I loved it. Def get the map sensor for it adjust ur timing curv due to the manifold absolute manifold pressure.
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Re: electronic ignition conversion for magneto???

Post by blown480 »

SwirledWarII wrote:Thank you all for the info! Another question if I may ask. since my engine was rebuilt I've only put about 130 hours on it (220 gpu with dual mag conversion standard cylinders and low compression) the problem is at about 80 hours it dropped a valve seat resulting in a cost of about 700.00 to fix one cylinder, now at 130 hrs last thursday It possibly dropped another valve seat but this time the piston hit it and make a knocking sound the oil pressure was at 60 and the oil temp was at 160. Can anyone tell me why this engine keeps droppin valves and or valve seats? and what can I do to prevent this from happening in the future? also can anyone tell me where to get some parts cause it looks like I will be needing a standard jug and or piston. thanks guys!
have all clys, rings, gskts, etc for that motor, 321-636-4897,danny
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Re: electronic ignition conversion for magneto???

Post by dups350 »

SwirledWarII wrote:
In the Glades wrote:Are you running avgas?
87 unleaded with 2 large bottles of marvels mystery in the tank. I was told that since my engine was a "low compression" engine I could get by with 87 and I've been running that since break in. During break in I used avgas for the first 100 hours or so.
There is part of your problem.jmo never ever run anything under 93 octane! Jmo but I would never run that in any airboat engine.
Just bring it!!
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Re: electronic ignition conversion for magneto???

Post by farmboy »

If I don't have AV gas I DO NOT RIDE!
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SwirledWarII
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Re: electronic ignition conversion for magneto???

Post by SwirledWarII »

Whats weird is during break in while I was running Avgas it dropped the fist valve seat? Idk I'm going to repair it and try running a better fuel source Thanks guys for all the info I really appreciate your time!
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Re: electronic ignition conversion for magneto???

Post by boobidges »

What no one is saying is "those cylinders were built in the 1950's for engines never intendedto exceed about 2200 rpm.to run on 83 octane leaded fuel,and the alloy is softer than an actual"aircraft"cylinder .they've all been"overhauled"so many timestheres not much meat left to hold those seats.this is a major reason for doing the aircraft conversion. Best adviceis try to run AV gas give it marvel once in a while .
SwirledWarII
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Re: electronic ignition conversion for magneto???

Post by SwirledWarII »

Thank you all for your info I really appreciate it!
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Big Casino
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Re: electronic ignition conversion for magneto???

Post by Big Casino »

Make sure you invest in a CHT (Cylinder Head Temperature) Guage!!! They are available from many sources and in many styles. Do not just rely on your oil temp. By the time all that oil has had a chance to heat up in the sump, you will have already cooked your valves.....

Good Luck!
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