Today's Message Index:
----------------------
1. 04:36 AM - Re: High compression, high CHTs (Rob Ray)
2. 06:44 AM - Re: High compression, high CHTs (Wernerworld)
3. 07:06 PM - Re: High compression, high CHTs (Jim Stone)
4. 07:18 PM - Re: High compression, high CHTs (Jim Stone)
5. 08:10 PM - Re: High compression, high CHTs (Jones15183@aol.com)
6. 08:54 PM - Re: High compression, high CHTs (Bob J.)
Message 1
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| Subject: | High compression, high CHTs |
Jim,
I have the exact same setup in my HR2, a LyCon IO-540 with 10:1's and a EI ignition.
I have low CHT's comparatively, 330F in cruise on the lowest, 350F on
the highest. Since you are still breaking it in, I would give a chance for the
rings to seat, something highly evident inflight. You get a noticeable CHT and
oil temp drop. You need to run it hard, I mean HARD the first 5 hours. I typically
do a full power climb to 10,000+ feet on a new engine several times. The
timing issue sounds like the Mag, but one easy way to check is to isolate them
inflight which it sounds like you have. The EI timing is pretty straightforward
and works good, lasts a long time. I would check the timing on both, clean
the plugs and try it again...
Rob Ray
Tom Martin <fairlea@amtelecom.net> wrote: v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape
{behavior:url(#default#VML);} st1\:*{behavior:url(#default#ieooui)
} Jim
I have had ok service from the elctro air systems but others have
noted erratic ignition timing . Contact Jim Winings, in Indianapolis regarding
his electro air situation, as it sounds similar to what you are experiencing.
Tom Martin
---------------------------------
From: owner-rocket-list-server@matronics.com [mailto:owner-rocket-list-server@matronics.com] On Behalf Of Jim Stone
Sent: September 23, 2007 7:47 AM
To: rocket-list@matronics.com
Subject: Rocket-List: High compression, high CHTs
First let me announce the fact that N918JK is flying, as of about a week ago.
Second, I need some advice to clear up high CHTs.
I am running ElectroAir's ignition on lower plugs and a Slick Mag on the upper
plugs. I have 10-1 pistons in new Lycoming jugs. On the first few short
flights my CHTs climbed right through redline on 5 or 6 cylinders in less than
5 minutes. My EIS timing was factory set to 23 deg to account for the high compression
and I set the mag at 25 deg per the engine placard. I reduced the
EIS to 20 degrees and saw some relief but two of the CHTs (6 and 2) still climbing
into the low to mid 400s. Today I plan on retarding the Mag to 20 degrees
because during cruise I felt a vibration and turned the Mag off and the vibration
went away so I feel like the two ignitions were not working together. CHT
#4 is my coolest with a difference from the hottest (#6) 80-100 deg.
Question: What timing have you high compression guys been using to get reasonable
CHTs?
Other than ensuring no leaks in the baffles what else can I do?
BTW, a friend installed the louvers on the bottom of his F-1 cowl and it had
no effect so I'm not going there until last.
Thanks for you time,
Jim Stone
Louisville KY
Release Date: 20/09/2007 12:07 PM
20/09/2007 12:07 PM
---------------------------------
Pinpoint customers who are looking for what you sell.
Message 2
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| Subject: | Re: High compression, high CHTs |
Jim,
I run my mag at 25 degrees. What kind of temp did you see? Lycoming
redline is 500F. Hope you dind't get that high.
Russ
----- Original Message -----
From: Rob Ray
Sent: Monday, September 24, 2007 5:33 AM
Subject: RE: Rocket-List: High compression, high CHTs
Jim,
I have the exact same setup in my HR2, a LyCon IO-540 with 10:1's and
a EI ignition. I have low CHT's comparatively, 330F in cruise on the
lowest, 350F on the highest. Since you are still breaking it in, I would
give a chance for the rings to seat, something highly evident inflight.
You get a noticeable CHT and oil temp drop. You need to run it hard, I
mean HARD the first 5 hours. I typically do a full power climb to
10,000+ feet on a new engine several times. The timing issue sounds like
the Mag, but one easy way to check is to isolate them inflight which it
sounds like you have. The EI timing is pretty straightforward and works
good, lasts a long time. I would check the timing on both, clean the
plugs and try it again...
Rob Ray
Tom Martin <fairlea@amtelecom.net> wrote:
Jim
I have had ok service from the elctro air systems but
others have noted erratic ignition timing . Contact Jim Winings, in
Indianapolis regarding his electro air situation, as it sounds similar
to what you are experiencing.
Tom Martin
-------------------------------------------------------------------------
-----
From: owner-rocket-list-server@matronics.com
[mailto:owner-rocket-list-server@matronics.com] On Behalf Of Jim Stone
Sent: September 23, 2007 7:47 AM
To: rocket-list@matronics.com
Subject: Rocket-List: High compression, high CHTs
First let me announce the fact that N918JK is flying, as of about a
week ago.
Second, I need some advice to clear up high CHTs.
I am running ElectroAir's ignition on lower plugs and a Slick Mag on
the upper plugs. I have 10-1 pistons in new Lycoming jugs. On the
first few short flights my CHTs climbed right through redline on 5 or 6
cylinders in less than 5 minutes. My EIS timing was factory set to 23
deg to account for the high compression and I set the mag at 25 deg per
the engine placard. I reduced the EIS to 20 degrees and saw some relief
but two of the CHTs (6 and 2) still climbing into the low to mid 400s.
Today I plan on retarding the Mag to 20 degrees because during cruise I
felt a vibration and turned the Mag off and the vibration went away so I
feel like the two ignitions were not working together. CHT #4 is my
coolest with a difference from the hottest (#6) 80-100 deg.
Question: What timing have you high compression guys been using to
get reasonable CHTs?
Other than ensuring no leaks in the baffles what else can I do?
BTW, a friend installed the louvers on the bottom of his F-1 cowl and
it had no effect so I'm not going there until last.
Thanks for you time,
Jim Stone
Louisville KY
-------------------------------------------------------------------------
-----
9/23/2007 1:53 PM
Message 3
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| Subject: | Re: High compression, high CHTs |
Thanks Rob,
What timing do have your mag and EI set at?
Jim
----- Original Message -----
From: Rob Ray
To: rocket-list@matronics.com
Sent: Monday, September 24, 2007 7:33 AM
Subject: RE: Rocket-List: High compression, high CHTs
Jim,
I have the exact same setup in my HR2, a LyCon IO-540 with 10:1's
and a EI ignition. I have low CHT's comparatively, 330F in cruise on the
lowest, 350F on the highest. Since you are still breaking it in, I would
give a chance for the rings to seat, something highly evident inflight.
You get a noticeable CHT and oil temp drop. You need to run it hard, I
mean HARD the first 5 hours. I typically do a full power climb to
10,000+ feet on a new engine several times. The timing issue sounds like
the Mag, but one easy way to check is to isolate them inflight which it
sounds like you have. The EI timing is pretty straightforward and works
good, lasts a long time. I would check the timing on both, clean the
plugs and try it again...
Rob Ray
Tom Martin <fairlea@amtelecom.net> wrote:
Jim
I have had ok service from the elctro air systems but
others have noted erratic ignition timing . Contact Jim Winings, in
Indianapolis regarding his electro air situation, as it sounds similar
to what you are experiencing.
Tom Martin
-------------------------------------------------------------------------
---
From: owner-rocket-list-server@matronics.com
[mailto:owner-rocket-list-server@matronics.com] On Behalf Of Jim Stone
Sent: September 23, 2007 7:47 AM
To: rocket-list@matronics.com
Subject: Rocket-List: High compression, high CHTs
First let me announce the fact that N918JK is flying, as of about a
week ago.
Second, I need some advice to clear up high CHTs.
I am running ElectroAir's ignition on lower plugs and a Slick Mag on
the upper plugs. I have 10-1 pistons in new Lycoming jugs. On the
first few short flights my CHTs climbed right through redline on 5 or 6
cylinders in less than 5 minutes. My EIS timing was factory set to 23
deg to account for the high compression and I set the mag at 25 deg per
the engine placard. I reduced the EIS to 20 degrees and saw some relief
but two of the CHTs (6 and 2) still climbing into the low to mid 400s.
Today I plan on retarding the Mag to 20 degrees because during cruise I
felt a vibration and turned the Mag off and the vibration went away so I
feel like the two ignitions were not working together. CHT #4 is my
coolest with a difference from the hottest (#6) 80-100 deg.
Question: What timing have you high compression guys been using to
get reasonable CHTs?
Other than ensuring no leaks in the baffles what else can I do?
BTW, a friend installed the louvers on the bottom of his F-1 cowl
and it had no effect so I'm not going there until last.
Thanks for you time,
Jim Stone
Louisville KY
Message 4
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| Subject: | Re: High compression, high CHTs |
Hey Russ,
The second flight they were climbing to redline and I had to land at my
emergency field. They have responded to retarding the timing to 20 deg.
I also discovered the mag was not timed where I had set it, it was way
early, probably a rookie mistake. I think I may have seen the drop that
comes with initial breakin just today, temps were better (less than
410). The engine does not seem to be as smooth as I would like but I
have little experience behind a souped up 540. I will keep moving the
timing around until I find the setting that is best for my engine.
Jim Stone
Louisville
----- Original Message -----
From: Wernerworld
To: rocket-list@matronics.com
Sent: Monday, September 24, 2007 9:43 AM
Subject: Re: Rocket-List: High compression, high CHTs
Jim,
I run my mag at 25 degrees. What kind of temp did you see? Lycoming
redline is 500F. Hope you dind't get that high.
Russ
----- Original Message -----
From: Rob Ray
To: rocket-list@matronics.com
Sent: Monday, September 24, 2007 5:33 AM
Subject: RE: Rocket-List: High compression, high CHTs
Jim,
I have the exact same setup in my HR2, a LyCon IO-540 with 10:1's
and a EI ignition. I have low CHT's comparatively, 330F in cruise on the
lowest, 350F on the highest. Since you are still breaking it in, I would
give a chance for the rings to seat, something highly evident inflight.
You get a noticeable CHT and oil temp drop. You need to run it hard, I
mean HARD the first 5 hours. I typically do a full power climb to
10,000+ feet on a new engine several times. The timing issue sounds like
the Mag, but one easy way to check is to isolate them inflight which it
sounds like you have. The EI timing is pretty straightforward and works
good, lasts a long time. I would check the timing on both, clean the
plugs and try it again...
Rob Ray
Tom Martin <fairlea@amtelecom.net> wrote:
Jim
I have had ok service from the elctro air systems but
others have noted erratic ignition timing . Contact Jim Winings, in
Indianapolis regarding his electro air situation, as it sounds similar
to what you are experiencing.
Tom Martin
-------------------------------------------------------------------------
---
From: owner-rocket-list-server@matronics.com
[mailto:owner-rocket-list-server@matronics.com] On Behalf Of Jim Stone
Sent: September 23, 2007 7:47 AM
To: rocket-list@matronics.com
Subject: Rocket-List: High compression, high CHTs
First let me announce the fact that N918JK is flying, as of about a
week ago.
Second, I need some advice to clear up high CHTs.
I am running ElectroAir's ignition on lower plugs and a Slick Mag on
the upper plugs. I have 10-1 pistons in new Lycoming jugs. On the
first few short flights my CHTs climbed right through redline on 5 or 6
cylinders in less than 5 minutes. My EIS timing was factory set to 23
deg to account for the high compression and I set the mag at 25 deg per
the engine placard. I reduced the EIS to 20 degrees and saw some relief
but two of the CHTs (6 and 2) still climbing into the low to mid 400s.
Today I plan on retarding the Mag to 20 degrees because during cruise I
felt a vibration and turned the Mag off and the vibration went away so I
feel like the two ignitions were not working together. CHT #4 is my
coolest with a difference from the hottest (#6) 80-100 deg.
Question: What timing have you high compression guys been using to
get reasonable CHTs?
Other than ensuring no leaks in the baffles what else can I do?
BTW, a friend installed the louvers on the bottom of his F-1 cowl
and it had no effect so I'm not going there until last.
Thanks for you time,
Jim Stone
Louisville KY
href="http://www.matronics.com/Navigator?Rocket-List">http://www.matron
href="http://forums.matronics.com">http://forums.matronics.com
-------------------------------------------------------------------------
---
Release Date: 9/23/2007 1:53 PM
Message 5
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| Subject: | Re: High compression, high CHTs |
Jim. are you aware that your EIS has an automatic advance of +7 degrees. So
whatever you set the initial setting on , at 2500 RPM degrees the timing is
supposed to read 25 degrees BTDC. Or whatever your manufacturer calls for
your engine. At 23/23 you might be reading a timing of approx. 32 degrees
BTDC. At alt. your highest timing might be 38 degrees BTDC. There are a lot
of questions that could be answered about your Eis if I knew all the
parameters. Do You have the CSTW or the rear timing mount system. It makes a
lots of
defference in adjusting your timing system. billy waters
Message 6
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| Subject: | Re: High compression, high CHTs |
Jim, congrats on your first flight. Its too bad you have to spend this time
debugging and not enjoying something you spent years building.
1. What type of pickup (crank trigger/mag hole trigger)?
2. Which plugs are you running on the bottoms?
3. Have you connected a voltmeter to the the Electroair to determine how
much advance there is?
4. Why are your mags not timed exactly to the EI?
Regards,
Bob Japundza
RV-6 flying F1 under const.
On 9/23/07, Jim Stone <jrstone@insightbb.com> wrote:
>
> First let me announce the fact that N918JK is flying, as of about a week
> ago.
> Second, I need some advice to clear up high CHTs.
> I am running ElectroAir's ignition on lower plugs and a Slick Mag on the
> upper plugs. I have 10-1 pistons in new Lycoming jugs. On the first few
> short flights my CHTs climbed right through redline on 5 or 6 cylinders in
> less than 5 minutes. My EIS timing was factory set to 23 deg to account for
> the high compression and I set the mag at 25 deg per the engine placard. I
> reduced the EIS to 20 degrees and saw some relief but two of the CHTs (6 and
> 2) still climbing into the low to mid 400s. Today I plan on retarding the
> Mag to 20 degrees because during cruise I felt a vibration and turned the
> Mag off and the vibration went away so I feel like the two ignitions were
> not working together. CHT #4 is my coolest with a difference from the
> hottest (#6) 80-100 deg.
> Question: What timing have you high compression guys been using to get
> reasonable CHTs?
> Other than ensuring no leaks in the baffles what else can I do?
> BTW, a friend installed the louvers on the bottom of his F-1 cowl and it
> had no effect so I'm not going there until last.
> Thanks for you time,
> Jim Stone
> Louisville KY
>
> *
>
>
> *
>
>
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