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IO-540 C4B5

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Gwayne

Joined: 25 Nov 2008
Posts: 4

Posted: Tue Aug 18, 2009 1:47 pm Post subject: IO-540 C4B5

Anybody have any thoughts on this 250hp narrow deck engine for the -10 I am building.



Thanks



Wayne

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_________________
Wayne
RV 7 "eh?" 120 hrs
RV 10 fuse

dmaib@me.com

Joined: 25 Apr 2006
Posts: 455
Location: New Smyrna Beach, Florida

Posted: Tue Aug 18, 2009 2:03 pm Post subject: IO-540 C4B5

I have a C4B5 in my airplane. The engine came out of an Aztec, so had  

the wrong engine mount flanges. I had to order new ones from  

Lycoming. Other than that, it works great.



David Maib

40559

Flying



On Aug 18, 2009, at 5:47 PM, Gwayne wrote:



 	  Quote: 	
		   



 Anybody have any thoughts on this 250hp narrow deck engine for the  

 -10 I am building.



 Thanks



 Wayne



 --------

 Wayne

 RV 7 &quot;eh?&quot; 120 hrs

 RV 10 fuse





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p 58513#258513

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_________________
David Maib
RV-10 #40559
New Smyrna Beach, FL

tomflysalot

Joined: 22 Jan 2008
Posts: 27

Posted: Tue Aug 18, 2009 2:20 pm Post subject: IO-540 C4B5

Gwayne,



We've overhauled several and converted them for RV-10 use.  They appear

to work well.  

If you wanted to up the HP, you could even increase it with very little

effort.



Tom Lawson

970-420-1798

____________________________________________________________

Need cash? Click to get a loan.

http://thirdpartyoffers.juno.com/TGL2141/fc/BLSrjpTFRc8leuwM9V7E6sZM1UKgk37NeGL7yyHQhI2XHiNXX2q7jAFamK8/

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coop85(at)verizon.net
Guest

Posted: Tue Aug 18, 2009 3:25 pm Post subject: IO-540 C4B5

I had a C4B5 on my Skybolt and it worked great!  My understanding (limited

at best) is the only difference is the counterweights limiting the max RPM

10 2600 whereas the D4A5 can spin up to 2700 which is where the 10 extra hp

comes from, otherwise they are the same.  I also had to swap out the

mounting ears as mine came from an Aztec, but that is not a big deal.



Marcus

Do not archive



--

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timrvator(at)comcast.net
Guest

Posted: Wed Aug 19, 2009 3:33 pm Post subject: IO-540 C4B5

According to the Lycoming IO-540 Parts Catalog (PC-215-1, June 1993), 

the C4B5 and D4A5 use the same counterweights (LW-19227) and same 

rollers (72797).  Going through the parts catalog, I found that every 

single part is identical except for some different options on engine 

mounting brackets ("ears") and oil filler/dipstick.  Lycoming tech 

support ((at) OSH) confirmed this.  They confirmed the C4B5 can safely run 

at 2700 rpm just like the D4A5, producing the same horsepower, because 

they are the same engine.



Tim



-- 

Tim Lewis -- HEF (Manassas, VA)

RV-6A N47TD -- 1060 hrs

RV-10 N31TD -- Painting done, final assembly -- OSH 2010 or bust



Marcus Cooper wrote:

[quote] 



 I had a C4B5 on my Skybolt and it worked great!  My understanding (limited

 at best) is the only difference is the counterweights limiting the max RPM

 10 2600 whereas the D4A5 can spin up to 2700 which is where the 10 extra hp

 comes from, otherwise they are the same.  I also had to swap out the

 mounting ears as mine came from an Aztec, but that is not a big deal.



 Marcus

 Do not archive



 --

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dmaib@me.com

Joined: 25 Apr 2006
Posts: 455
Location: New Smyrna Beach, Florida

Posted: Wed Aug 19, 2009 4:52 pm Post subject: IO-540 C4B5

My engine shop in Minneapolis, (Bolduc) confirmed this, as well.



David Maib

40559

Flying

On Aug 19, 2009, at 7:31 PM, Tim Lewis wrote:



[quote] 



 According to the Lycoming IO-540 Parts Catalog (PC-215-1, June  

 1993), the C4B5 and D4A5 use the same counterweights (LW-19227) and  

 same rollers (72797).  Going through the parts catalog, I found  

 that every single part is identical except for some different  

 options on engine mounting brackets ("ears") and oil filler/ 

 dipstick.  Lycoming tech support ((at) OSH) confirmed this.  They  

 confirmed the C4B5 can safely run at 2700 rpm just like the D4A5,  

 producing the same horsepower, because they are the same engine.



 Tim



 -- 

 Tim Lewis -- HEF (Manassas, VA)

 RV-6A N47TD -- 1060 hrs

 RV-10 N31TD -- Painting done, final assembly -- OSH 2010 or bust



 Marcus Cooper wrote:

> 

>

> I had a C4B5 on my Skybolt and it worked great!  My understanding  

> (limited

> at best) is the only difference is the counterweights limiting the  

> max RPM

> 10 2600 whereas the D4A5 can spin up to 2700 which is where the 10  

> extra hp

> comes from, otherwise they are the same.  I also had to swap out the

> mounting ears as mine came from an Aztec, but that is not a big deal.

>

> Marcus

> Do not archive

>

> --

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_________________
David Maib
RV-10 #40559
New Smyrna Beach, FL

jim(at)CombsFive.Com
Guest

Posted: Wed Aug 19, 2009 7:19 pm Post subject: IO-540 C4B5

YES IT DOES!  I have a C4B5 and I do have it set up for 2700 RPM.  Only use it for a short period but what a ride!  Changed out the left retard mag with a Lightspeed Plasma III.  Had Airflow Performance overhaul the injector system.  Changed the mounting ears as wellJim C40192 (N312F) Flying 100 hours in 9 monthsDo Not Archive--> RV10-List message posted by: Tim Lewis <timrvator(at)comcast.net>According to the Lycoming IO-540 Parts Catalog (PC-215-1, June 1993),the C4B5 and D4A5 use the same counterweights (LW-19227) and samerollers (72797).  Going through the parts catalog, I found that everysingle part is identical except for some different options on enginemounting brackets ("ears") and oil filler/dipstick.  Lycoming techsupport ((at) OSH) confirmed this.  They confirmed the C4B5 can safely runat 2700 rpm just like the D4A5, producing the same horsepower, becausethey are the same engine.Tim--Tim Lewis -- HEF (Manassas, VA)RV-6A N47TD -- 1060 hrsRV-10 N31TD -- Painting done, final assembly -- OSH 2010 or bustMarcus Cooper wrote:> --> RV10-List message posted by: "Marcus Cooper" <coop85(at)verizon.net>>> I had a C4B5 on my Skybolt and it worked great!  My understanding> (limited> at best) is the only difference is the counterweights limiting the max> RPM> 10 2600 whereas the D4A5 can spin up to 2700 which is where the 10 extra> hp> comes from, otherwise they are the same.  I also had to swap out the> mounting ears as mine came from an Aztec, but that is not a big deal.>> Marcus> Do not archive>> --

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