Today's Message Index:
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1. 06:08 AM - Re: Re: 912 Spark Plugs (David Weaver)
2. 06:58 AM - Re: Re: 912 Spark Plugs (FLYaDIVE)
3. 07:05 AM - Re: 912 Spark Plugs (John Hauck)
4. 07:19 AM - Rotax 91X 26 amp Gen2 $137.50 per amp (rparigoris)
5. 08:53 AM - Re: Re: 912 Spark Plugs (David Weaver)
6. 12:19 PM - Re: Re: 912 Spark Plugs (John Hauck)
Message 1
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| Subject: | Re: 912 Spark Plugs |
The iridium electrode plugs feature perhaps the lowest rate of electrode lo
ss or wear over time.- They make sense for high energy ignition systems.
- The Rotax ignition system is a low energy system where standard spark p
lug electrode wear over time is very low.- I appreciate the low maintenan
ce of iridium spark plugs in my autos, but do not feel they are a good inve
stment for my Rotax 912.- I consider iridium spark plugs in my autos to b
e life time plugs.- I have a Toyota that is at 200,000 miles with the ori
ginal iridium spark plugs still performing as if the auto were new.--Af
ter first 100,000 miles, the electrode gap had changed only 1.5 - 2.0 thous
andths!- When I do pull them, I check for gas leakage around the porcelai
n insulator before regaping and reinstallation.- Some auto manufacturers
spec their autos equipped with iridium spark plugs for spark plug service a
fter 100,000 miles.=0ADavid Weaver N012GR=0A- =0A =0A=0A_________________
_______________=0A From: Roger Lee <ssadiver1@yahoo.com>=0ATo: rotaxengines
-list@matronics.com =0ASent: Monday, February 10, 2014 6:49 PM=0ASubject: R
otaxEngines-List: Re: 912 Spark Plugs=0A =0A=0A--> RotaxEngines-List messa
ge posted by: "Roger Lee" <ssadiver1@yahoo.com>=0A=0AThe iridium's will wor
k, but I don't know if you really get any more for your money. They are alm
ost triple the price.=0A=0A--------=0ARoger Lee=0ATucson, Az.=0ALight Sport
Repairman - Maintenance Rated=0ARotax Repair Center - Heavy Maint. Rated
=0AHome 520-574-1080- TRY HOME FIRST=0ACell 520-349-7056=0A=0A=0A=0A=0ARe
ad this topic online here:=0A=0Ahttp://forums.matronics.com/viewtopic.php?p
=========================0A
- - - - - - - - - - - - - -Matt Dralle, List Adm
=====
Message 2
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| Subject: | Re: 912 Spark Plugs |
David:
You are using reverse logic. The poorer the ignition system the more you
should do to improve it. Not to keep it poor. The advantage of iridium or
platinum plugs are:
1 - Harder denser material which will not reverse deposit, deteriorating
away the electrode.
2 - Higher corrosion protection so the electrodes will not rust away
loosing material.
3 - Higher resistance to erosion at high temperatures both from the heat of
the engine and the heat of the electric spark.
4 - Lower electrical resistance.
5 - Smaller surface area which reduces carbon and lead fouling. I know, I
know, this sounds like reverse logic, doesn't it! - Because you would think
that MORE area would be required so when you get carbon and lead fouling
more area would be available for the spark to jump across the electrodes.
NOT SO! Better conduction, with smaller area, allows the carbon and lead
fouling to be blown off an NOT get a foot hold. Contrary to popular
opinion - More is not always better. Consider the Massive Electro Plugs -
No where near as good as the 'BY' series or the better iridium plugs.
I do not understand why a new engines like the Rotax do not have a modern
ignition system. You would think that all that was learned over the past
104 years of aviation and automobiles - SOME of it would be applied to
today's engines.
Car ignition systems of today produce 60,000 to 100,000 Volts to make a
spark. Yes, there are some systems today that are up there, some, very few.
As for co$t. I don't think you will find anyone else as tight fist'd as I.
And even so when you compare: A basic plug of $2.50 Vs a iridium plug of
$7.50 ... What are you talking about a $5 difference!!! That would be $25
more for an entire engine that cost you $18,000! $25 would buy you about
4.5 gallons of AvGas or 6.5 gallons of MoGas. How much is it worth NOT to
get stranded and NOT have to pull & clean the plugs? This is one area where
I want to hedge my bet.
Barry
On Fri, Feb 21, 2014 at 9:08 AM, David Weaver <mortweaver@sbcglobal.net>wrote:
> The iridium electrode plugs feature perhaps the lowest rate of electrode
> loss or wear over time. They make sense for high energy ignition systems.
> The Rotax ignition system is a low energy system where standard spark plug
> electrode wear over time is very low. I appreciate the low maintenance of
> iridium spark plugs in my autos, but do not feel they are a good investment
> for my Rotax 912. I consider iridium spark plugs in my autos to be life
> time plugs. I have a Toyota that is at 200,000 miles with the original
> iridium spark plugs still performing as if the auto were new. After first
> 100,000 miles, the electrode gap had changed only 1.5 - 2.0 thousandths!
> When I do pull them, I check for gas leakage around the porcelain insulator
> before regaping and reinstallation. Some auto manufacturers spec their
> autos equipped with iridium spark plugs for spark plug service after
> 100,000 miles.
> David Weaver N012GR
>
> *From:* Roger Lee <ssadiver1@yahoo.com>
> *To:* rotaxengines-list@matronics.com
> *Sent:* Monday, February 10, 2014 6:49 PM
> *Subject:* RotaxEngines-List: Re: 912 Spark Plugs
>
>
> The iridium's will work, but I don't know if you really get any more for
> your money. They are almost triple the price.
>
> --------
> Roger Lee
> Tucson, Az.
> Light Sport Repairman - Maintenance Rated
> Rotax Repair Center - Heavy Maint. Rated
> Home 520-574-1080 TRY HOME FIRST
> Cell 520-349-7056
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopnbsp; -Matt
> Dralle,===========
>
>
> *
>
>
> *
>
>
Message 3
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| Subject: | Re: 912 Spark Plugs |
I have a set of DCPR8EIX NGK's to install as soon as I get a chance. Anxious to
see how they perform in the 912ULS compared to the DCPR8E NGK's. If I get a
little more power, I'll take it. If I get a little bit better fuel burn, I'll
take that too.
I paid twice as much for the iridium plugs as I would have for standard plugs.
I'm sure I can get 200 hours out of them, we did that with DCPR8E's in the 912ULS.
At the rate I have been flying the last couple years, those iridium plugs may last
the rest of my life. ;-)
--------
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=419114#419114
Message 4
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| Subject: | Rotax 91X 26 amp Gen2 $137.50 per amp |
Hi Group
Those who have a Rotax 91X know things aren't cheap.
Here's a 26 amp Gen2 for $137.50 per amp:
http://sportair.aero/12-epapower/epapower/
Ron Parigoris
BTW if you are a real die hard you can put one on the 130 HP 915 for $57,250
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=419116#419116
Message 5
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| Subject: | Re: 912 Spark Plugs |
I have over 350 hours on a 912-UL engine burning no-lead auto fuel.- I pu
rchased an extra set of standard NGK plugs so I could have a clean extra se
t to swap out on periodic inspection.- It appears that the standard plugs
may last for the first 1,000 hours of engine operation simply by cleaning
and readjusting electrode gap as necessary.- I know some believe cleaning
spark plugs to be improper procedure and dirty plugs should be replaced.
- It is hard for me to change what I have learned from experience working
on gas engines from the time that we were polarizing replacement voltage r
egulators on automotive electrical system with generators.- When it comes
time to replace the-manufacturer specked-spark plugs, I will install t
he iridium equivalent and fully expect to see no change in engine performan
ce.-=0ADave Weaver N912GR=0A =0A=0A________________________________=0A Fr
om: John Hauck <jhauck@elmore.rr.com>=0ATo: rotaxengines-list@matronics.com
=0ASent: Friday, February 21, 2014 7:05 AM=0ASubject: RotaxEngines-List: R
Hauck" <jhauck@elmore.rr.com>=0A=0AI have a set of DCPR8EIX NGK's to insta
ll as soon as I get a chance.- Anxious to see how they perform in the 912
ULS compared to the DCPR8E NGK's.- If I get a little more power, I'll tak
e it.- If I get a little bit better fuel burn, I'll take that too.=0A=0AI
paid twice as much for the iridium plugs as I would have for standard plug
s.- I'm sure I can get 200 hours out of them, we did that with DCPR8E's i
n the 912ULS.=0A=0AAt the rate I have been flying the last couple years, th
ose iridium plugs may last the rest of my life.- ;-)=0A=0A--------=0AJohn
Hauck=0AMKIII/912ULS=0Ahauck's holler=0ATitus, Alabama=0A=0A=0A=0A=0ARead
this topic online here:=0A=0Ahttp://forums.matronics.com/viewtopic.php?p=
- - - - - - - - - - - - - -Matt Dralle, List Adm
=====
Message 6
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| Subject: | Re: 912 Spark Plugs |
Hi Folks:
The 912UL is much easier on spark plugs than the 912ULS, having discovered
this by flying 1250.0 hours with my 912 (bought it before the 912UL/912ULS
were developed), and 2,000.0+ hours on my 912ULS's. On a steady diet of
MOGAS, the 912UL might just make it to 1,000.0 hours on a set of plugs, but
I imagine there won't be much left of the electrode and ground strap.
I pulled my old DCPR8ES's out of the 912ULS this morning and replaced with
DCPR8EIX's. Comparing the two plugs it seems to me that the newer
technology will work a lot better in my engine. I am going to think
positive and hope for a slight improvement in performance. I can use all I
can get.
I have three tractors that sport generators and voltage regulators.
However, I polarize the generator and not the regulator. My first generator
was on a 1931 Model A Ford I drove to school back in the mid-50's. However,
back then I didn't know the first thing about polarizing generators. ;-)
Looking forward to flying with the iridium plugs as soon as my airstrip
dries out from the thunder storms last night, and I get the cow manure
spread out to dry. The cows love to crap on my airstrip. I have a diamond
drag I made out of 6 truck tires. I use the old antique tractors to pull
the drag to spread the manure which helps it dry faster. Kills two birds
with one stone. Gets the old gals some exercise and helps keep the cow crap
off my airplane.
john h
Kolb MKIII - 3,231.8 hours
912ULS - 663.3 hours
Titus, Alabama
I have over 350 hours on a 912-UL engine burning no-lead auto fuel
It is hard for me to change what I have learned from experience working on
gas engines from the time that we were polarizing replacement voltage
regulators on automotive electrical system with generators.
When it comes time to replace the manufacturer specked spark plugs, I will
install the iridium equivalent and fully expect to see no change in engine
performance.
Dave Weaver N912GR
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