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  #11  
Old 09-17-2018, 04:28 PM
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13brv3 13brv3 is offline
 
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Thanks. I saw those mentioned somewhere else as well, so I'll give them a try.

I'm going to try the auto plugs with the Taylor Spiro Pro 8mm wires I have now, just because it costs nothing, and might work. Auto plugs often have higher resistance, so it won't hurt to try. If that still causes noise, I'll have to look for better suppression wires, like the Maganacor.

Rusty (make the noise stop...)
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  #12  
Old 09-17-2018, 05:01 PM
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My experience has been that the noise will be reduced and be acceptable, but not completely eliminated. I'd like to get a spool of Magnecor wire to try.
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N55BC RV-6 borrowed, flying
N678X F1 Rocket, under const.
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  #13  
Old 09-18-2018, 02:19 PM
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Quote:
Originally Posted by 13brv3 View Post
Thanks. I saw those mentioned somewhere else as well, so I'll give them a try.

I'm going to try the auto plugs with the Taylor Spiro Pro 8mm wires I have now, just because it costs nothing, and might work. Auto plugs often have higher resistance, so it won't hurt to try. If that still causes noise, I'll have to look for better suppression wires, like the Maganacor.

Rusty (make the noise stop...)
Rusty,
I bought one of Jeff Rose's first Electroair systems back in the early 90's for my 0-320A powered RV4 and used his stock automotive wires with Autolite 386 automotive plugs with no radio noise noted, ever. I avoided Aircraft plugs as the issues (and cost) outweighed the gains.
Additionally, Autolite 386's thread right into the cylinder and are so cheap you can discard them for new ones every year.

My HR2 (IO-540) and my RVX(0-360) also have early Electroair ignitions with ACCEL plug wires, Denso L-14U or A386 plugs and I've never had radio noise issues (although those jets get quieter every year).
FYI...

V/R
Smokey

Last edited by smokyray : 09-18-2018 at 02:33 PM.
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  #14  
Old 09-18-2018, 02:28 PM
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13brv3 13brv3 is offline
 
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That's interesting. I didn't know you could even buy 18mm plugs anymore. Of course I've already ordered the adapters, so I'll stick with the 14mm plugs. How many hours do you get on a set? Just curious really, since there's be no reason to ever reinstall a used plug for what those cost.

Cheers,
Rusty
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RV-8, SN-80587, built, flown, sold.
RV-3B, SN-10751, rotary engine, built, flown, sold
RV-8, SN-82470, built, flown, sold.
RV-3B, SN-11351, purchased (yes it's cheating)
A&P - 2018 dues paid
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  #15  
Old 09-18-2018, 02:35 PM
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I've tried the 386's in the past and found them to be too hot. Would get dieseling on shutdown, electrodes would wear relatively quickly, and would get occasional misses. You can certainly try them but I wasn't happy with them. After going to the adapters I tried BR8ES and they were better, but the BR9ES plugs being a step colder work great.
__________________
Bob Japundza CFI A&PIA
N55BC RV-6 borrowed, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
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  #16  
Old 09-21-2018, 05:56 AM
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13brv3 13brv3 is offline
 
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Quote:
Originally Posted by rocketbob View Post
My experience has been that the noise will be reduced and be acceptable, but not completely eliminated.
This is completely accurate. I installed the auto plugs, and reterminated the Taylor Spiro Pro wires yesterday. A quick test shows noise so low that you'd never hear it if you didn't know what to listen for.

I meant to measure the resistance of the aircraft plugs, but I did measure the auto plugs at about 4500 ohms. The Tempest plugs allow a range of 500-5000 ohms, and I'm betting they're close to the 500 end.

Thanks for the comments!
Rusty
__________________
RV-8, SN-80587, built, flown, sold.
RV-3B, SN-10751, rotary engine, built, flown, sold
RV-8, SN-82470, built, flown, sold.
RV-3B, SN-11351, purchased (yes it's cheating)
A&P - 2018 dues paid
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  #17  
Old 09-21-2018, 07:13 AM
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rocketbob rocketbob is offline
 
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Good to hear.

Aircraft radios generally have an amplifier gain circuit that turns up the gain on weaker transmissions (usually 100+ miles away) and you will hear more noise in those cases. Otherwise its fine.

I've been wanting to try Magnecor wire but I still have a spool of Taylor wire.
__________________
Bob Japundza CFI A&PIA
N55BC RV-6 borrowed, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
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