Today's Message Index:
----------------------
1. 05:39 AM - Re: Connecting rod/bolt balancing questions (Gary Casey)
2. 07:48 AM - Quick Build firewall forward package (Stein Erik Johansen)
3. 08:08 AM - Re: Re: Connecting rod/bolt balancing questions (Jim Baker)
4. 09:08 AM - Re: Quick Build firewall forward package (Steve Thomas)
5. 11:33 AM - Re: Re: Connecting rod/bolt balancing questions (TeamGrumman@aol.com)
6. 12:01 PM - Re: Re: Connecting rod/bolt balancing questions (Hopperdhh@aol.com)
7. 12:13 PM - Re: Quick Build firewall forward package (Stein Erik Johansen)
8. 01:29 PM - Re: Re: Connecting rod/bolt balancing questions (n801bh@netzero.com)
9. 10:08 PM - List Behaviour & Attitudes (Konrad L. Werner)
Message 1
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| Subject: | Re: Connecting rod/bolt balancing questions |
--> Engines-List message posted by: Gary Casey <glcasey@adelphia.net>
Dan,
In all the fun we all ignored your original question - "how good is
good enough?" - for which there is probably no answer. At one
extreme you could just bolt the parts together and get what you get.
At the other extreme is perfection, which you won't get. I'm
certainly not an expert as to where you can remove material from
connecting rods, but I would suggest not removing material unless you
are sure there is no stress at that location. Regardless of what you
do, I propose that the difference between putting the engine together
with existing parts just matched as best you can (two heaviest rods
opposite each other, etc) and going for perfection will be
imperceptible. And it will have no effect whatsoever on power,
reliability or durability. Search for perfection someplace else.
Just my opinion.
Gary
>
> In my first post, I wanted to know what is considered good enough.
>
> clip ---
> Speaking of engine balance, what is considered good enough? Is 6
> grams at
> the big end of the rods really bad, or good, or what? It looks
> like I have
> about 3 grams worst case on the recip end. The crank is good
> (under 1 gram),
>
> and the piston/pins are only a couple of tenths apart.
> ---
>
> Archie says that nothing less than perfect is acceptable. I know that
> perfect is impossible to achieve, so I still want to know what is
> considered "good
>
> enough."
>
> Dan Hopper
> RV-7A Flying (working on 2nd engine)
Message 2
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| Subject: | Quick Build firewall forward package |
--> Engines-List message posted by: Stein Erik Johansen <rv7a.norway@bluezone.no>
Hello engine-listers :-)
Engine installation is a time consuming part of the building prosess. Is there
a company that sell a "Quick Build" firewall forward package which would reduce
installation time? (like Eggenfellners subaru konversion firewall forward solution)
With all the probes, governor, wires and lines attached?
Regards
Stein Erik Johansen
RV-7A QB
Norway
Message 3
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| Subject: | Re: Connecting rod/bolt balancing questions |
--> Engines-List message posted by: "Jim Baker" <jlbaker@telepath.com>
> In all the fun we all ignored your original question - "how good is
> good enough?"
Not to be the puryevor of doom and gloom, how about...
Crankcase cylinder deck height variations
between banks
Crankcase cylinder deck height variations
between cylinders
Crankshaft stroke variations between
journals
Connecting rod rotating weight (already
discussed)
Connecting rod reciprocating weight
Connecting rod length (pin CL to CL)
Piston weight
Piston dome volume
Piston wrist pin height
Wrist pin weight
Cylinder head volume
Cylinder intake and exhaust port airflow
Cylinder - installed height of intake and
exhaust valves
Courtesy of the Mattituck site (too lazy to type it myself). There's just a lot
more than rod weights to consider. Of course, all this may be overkill.
Shoot, give 'em a call at 800.624.6680 and see what tolerances they
use. May be enlightening....or discouraging. Your pick.
Jim Baker
580.788.2779
'71 SV, 492TC
Elmore City, OK
Message 4
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| Subject: | Re: Quick Build firewall forward package |
--> Engines-List message posted by: Steve Thomas <lists@stevet.net>
Stein,
Take a look at Mistral Engines, out of Geneva. They are in Europe,
which should be an advantage to you, and they have a complete engine
system with all sensors and monitor included. You need to add your
own cooling and cowl, but there are good sources for those as well.
I'll forward that info. along if you have the interest.
http://www.mistral-engines.com
Or call Francois Badoux
011-41-22-797-43-23
On Mar 21, 2006, at 7:45 AM, Stein Erik Johansen wrote:
> --> Engines-List message posted by: Stein Erik Johansen
> <rv7a.norway@bluezone.no>
>
> Hello engine-listers :-)
>
> Engine installation is a time consuming part of the building
> prosess. Is there a company that sell a "Quick Build" firewall
> forward package which would reduce installation time? (like
> Eggenfellners subaru konversion firewall forward solution)
> With all the probes, governor, wires and lines attached?
>
> Regards
> Stein Erik Johansen
> RV-7A QB
> Norway
>
>
Best Regards,
Steve Thomas
SteveT.Net
steve@stevet.net
805-569-0336 Office
Message 5
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| Subject: | Re: Connecting rod/bolt balancing questions |
--> Engines-List message posted by: TeamGrumman@aol.com
In a message dated 3/21/06 5:40:46 AM, glcasey@adelphia.net writes:
> In all the fun we all ignored your original question - "how good is=A0
> good enough?" -
>
OK, so you've balanced your recip parts to .000000001 grams. Now, you go
fly. Fuel deposits (or carbon, or varnish, or oil accumulation on the bottom
of the piston, or ???) build up on the various parts until your balance is
reduced to, say, 1 gram. Was it worth all that aggravation?
Message 6
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| Subject: | Re: Connecting rod/bolt balancing questions |
--> Engines-List message posted by: Hopperdhh@aol.com
Are you saying the answer to my original post is 1 gram? Or, just having
more fun?
I still haven't gotten what seems like a good answer, except for some very
good advice from Jim Baker. The book is on it way, Jim. Thanks for that
advice. I hate to bother Mattituck for their trade secrets. I'm sure every shop
has their limits which they don't want the world to know. Its even hard to
tell what Lycoming's limits are -- they just use letter codes to group the
weights. I can't find anything that defines these weights. That would help.
This is a take-your-time project, so I don't need an instant answer. I will
wait another day or two for listers to reply. BTW, I have gotten some good
advice in private emails. Most people who reply privately are very
knowledgeable and don't want to suffer all the criticism that an on list reply
seems to
invite. I think its fun, too. Sorry, Archie, for getting a little excited
the other day. I'm sure you do very good work.
Dan Hopper
RV-7A Flying -- working on "spare" engine
In a message dated 3/21/2006 2:34:10 P.M. Eastern Standard Time,
TeamGrumman@aol.com writes:
--> Engines-List message posted by: TeamGrumman@aol.com
In a message dated 3/21/06 5:40:46 AM, glcasey@adelphia.net writes:
> In all the fun we all ignored your original question - "how good is=A0
> good enough?" -
>
OK, so you've balanced your recip parts to .000000001 grams. Now, you go
fly. Fuel deposits (or carbon, or varnish, or oil accumulation on the
bottom
of the piston, or ???) build up on the various parts until your balance is
reduced to, say, 1 gram. Was it worth all that aggravation?
Message 7
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| Subject: | Re: Quick Build firewall forward package |
--> Engines-List message posted by: Stein Erik Johansen <rv7a.norway@bluezone.no>
Steve, thank for your reply.
I'll be happy if you could forward the info you mentioned.
The Mistral have a high "bare-engine" cost, but if you don't have to get to many
"accessories" it might not be so expensive all in all.
Thanks
Stein Erik Johansen
Tirsdag 21 mars 2006 18:06, skrev Steve Thomas:
> --> Engines-List message posted by: Steve Thomas <lists@stevet.net>
>
> Stein,
>
> Take a look at Mistral Engines, out of Geneva. They are in Europe,
> which should be an advantage to you, and they have a complete engine
> system with all sensors and monitor included. You need to add your
> own cooling and cowl, but there are good sources for those as well.
> I'll forward that info. along if you have the interest.
>
> http://www.mistral-engines.com
>
> Or call Francois Badoux
> 011-41-22-797-43-23
>
>
> On Mar 21, 2006, at 7:45 AM, Stein Erik Johansen wrote:
>
> > --> Engines-List message posted by: Stein Erik Johansen
> > <rv7a.norway@bluezone.no>
> >
> > Hello engine-listers :-)
> >
> > Engine installation is a time consuming part of the building
> > prosess. Is there a company that sell a "Quick Build" firewall
> > forward package which would reduce installation time? (like
> > Eggenfellners subaru konversion firewall forward solution)
> > With all the probes, governor, wires and lines attached?
> >
> > Regards
> > Stein Erik Johansen
> > RV-7A QB
> > Norway
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
> Best Regards,
>
> Steve Thomas
> SteveT.Net
> steve@stevet.net
> 805-569-0336 Office
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
Message 8
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| Subject: | Re: Connecting rod/bolt balancing questions |
--> Engines-List message posted by: "n801bh@netzero.com" <n801bh@netzero.com>
invite. I think its fun, too. Sorry, Archie, for getting a little excited
the other day. I'm sure you do very good work.
Dan Hopper
RV-7A Flying -- working on "spare" engine
////////////////////////////////////////////////////////////////////////////////////////////////////////////////
I have been reading Archie's post for a few years now and I can assure ya he knows
what he's saying and doing. I too get a "tire kicker" on my web site every
few weeks that claim to be up to speed and after a few emails back and forth
it is clear they have NEVER seen the inside of an engine, never less the finer
details of tweaking one. My answer to you is get it as close to in balance as
you feel is ok.
do not archive
Ben Haas
N801BH
www.haaspowerair.com
invite. I think its fun, too. Sorry, Archie, for getting a little excited
the other day. I'm sure you do very good work.
Dan Hopper
RV-7A Flying -- working on "spare" engine
////////////////////////////////////////////////////////////////////////////////////////////////////////////////
I have been reading Archie's post for a few years now and I can assure ya he knows
what he's saying and doing. I too get a "tire kicker" on my web site every
few weeks that claim to be up to speed and after a few emails back and forth
it is clear they have NEVER seen the inside of an engine, never less the finer
details of tweaking one. My answer to you is get it as close to in balance as
you feel is ok.
do not archive
BenHaas
N801BH
www.haaspowerair.com
Message 9
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| Subject: | List Behaviour & Attitudes |
--> Engines-List message posted by: "Konrad L. Werner" <klwerner@comcast.net>
> Snip <
..... Most people who reply privately are very knowledgeable and don't want to
suffer all the criticism that an on list reply seems to invite .....
> Snip <
I quite frankly miss the constructive input from some great people that are no
longer actively participating on these lists because of some other "experts" attitudes!
Perhaps these good guys now rather help from the background and only
give one-on-one advice, but forever withheld from the archives (where the info
would be most needed). How many people have been turned away by the offensive
etiquette sometimes displayed here. What a strange phenomenon?
And in regards to Archie F.: What a grand resource for all of us?
I have met and talked with him during Oshkosh, and he probably forgot more about
the subject of engine performance enhancements then I will ever know about them?
Ladies & Gentlemen, please lets practice some more class & discipline, ...instead
of offensive remarks about other peoples opinions about any given subject.
Thank you!
To be ARCHIVED !!!
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