From: krnet-bounces+johnbou=speakeasy.net@mylist.net To: John Bouyea Subject: KRnet Digest, Vol 346, Issue 91 Date: 8/26/2004 8:59:48 PM Send KRnet mailing list submissions to krnet@mylist.net To subscribe or unsubscribe via the World Wide Web, visit http://mylist.net/listinfo/krnet or, via email, send a message with subject or body 'help' to krnet-request@mylist.net You can reach the person managing the list at krnet-owner@mylist.net When replying, please edit your Subject line so it is more specific than "Re: Contents of KRnet digest..." Today's Topics: 1. Re: Type 4 Engine Bulidup (Scott Cable) 2. Re: Type 4 Engine Bulidup (Orma) 3. Turbo KR operators (Orma) 4. PlussBuss (Dan Heath) 5. Re: PlussBuss (Mark Jones) 6. Re: Turbo KR operators (Ron Eason) 7. Re: Turbo KR operators (Ron Eason) 8. Re: Type 4 Engine Bulidup (TNCOMPRESSORMAN@aol.com) 9. Re: PlussBuss (Allen Wiesner ) 10. Re: Type 4 Engine Bulidup (Orma) ---------------------------------------------------------------------- Message: 1 Date: Thu, 26 Aug 2004 10:57:24 -0700 (PDT) From: Scott Cable Subject: Re: KR> Type 4 Engine Bulidup To: KRnet Message-ID: <20040826175724.62474.qmail@web53003.mail.yahoo.com> Content-Type: text/plain; charset=us-ascii Orma, According to the AIAA, Multipy PSI by 2.036 to obtain inches of mercury. Did you say 15 lbs of boost? YEE HAAAAA That's alot of boost. DO NOT wire the waste gate shut, as you could easily overboost the engine. Do you have a fuel pressure regulator installed? If I remember correctly, prior to the Turbo you were on Gravity feed alone. It sounds like the engine is starving for fuel as you stated. The Turbo alone will consume fuel at a much faster rate, and you also increased the engine displacement, which again in it's self will put a greater demand for fuel. To satisfy the greater demand for fuel here are some suggestions: 1.) Re-plumb the fuel system with larger diameter fuel lines. 1/2" minium. Top off the Tank to get full head pressure. (Get Good Gas in her also) 2.) Install Dual electric fuel pumps and fuel pressure regulator(s). You will need some check valves and to run at 1 pump off of the emergency bus, while the other or primary runs from the primary electrical bus. 3.) Install a mechanical fuel pump, with an electric fuel pump as a back-up along with the required check valves, and wired off of the emergency bus. 4.) Are you utilizing a fixed pitch prop? If so you should consider replacing the fixed pitch with either a constant speed or a flight adjustable prop. 5.) The waste gate should be set to the maximum amount of boost that you will allow the engine to develop, and then open to dump the excess boost. 15 lbs of Boost is alot of boost, you should probably set the waste gate for a lower setting. If not, you could easily damage the engine. You have to be very careful about detonation and pre-ignition issues. Especially with the higher amounts of boost. I often thought of making a provision for a cockpit adjustable wastegate. I have thought otherwise however because of too great a temptation to allow more boost into the engine ( I readily admit to being addicted to "More Power"), actually too much boost into the engine. 6.) I believe Turbo City (Gardena, CA) sells a boost sensitive fuel pressure and fuel volume regulator. When the engine starts making boost, it's demand for fuel increases. The regulator senses the boost and allows the additional fuel volume and pressure. When the boost demand subsides, again the regulator senses the reduced demand and adjusts the amount of volume and pressure. This type of regulator is expensive and it takes some time and patience to set up. Orma wrote: I don't know the relationship between " Hg and PSI that reads on a Boost gauge. Scott Cable KR-2S # 735 Wright City, MO s2cable1@yahoo.com --------------------------------- Do you Yahoo!? Read only the mail you want - Yahoo! Mail SpamGuard. ------------------------------ Message: 2 Date: Thu, 26 Aug 2004 20:32:11 -0400 From: "Orma" Subject: Re: KR> Type 4 Engine Bulidup To: "KRnet" Message-ID: <001501c48bcd$4bfffa40$442bd445@ROBBINS1> Content-Type: text/plain; charset="iso-8859-1" Did you say 15 lbs of boost? Hay Scott, Hold that horse. I said Boosted to 35" hg and the outside BP was 30.01" hg. Earlier I was given the formula of " hg/0.491159. In this case 4.99" hg/0.491159 = 10.1 PSI. The tying of the gate was tried both open and closed as a test to see how the engine performs at both extremes. I still have problems with the carburetion. Today I found a few intake leaks, by using soap bubbles and the blower end of the vacuum. Air was blown into the carb and pressurized the plumbing. Number 4 cylinder is hot because it is running too lean, verified by looking at the plug. #3 is also too lean, but not nearly like #4. Numbers 1 & 2 are running too rich, as the low temps and sooted plugs show. The carb may be capable of supplying the fuel, but my new custom manifolds may be crap. Information on the net about the Revflow indicates that in certain installations a pump supplying 1.5 to 2.0 PSI may be required. My carb runs too rich at low power and too lean at max power. The manifold runs measure the same length however more gas is getting to the left side and less to the right. I'm in the process of trying to modify the manifold so that the flow divides evenly to both the left and right sides. Any way my current plan is to get airborne by 1 September. If I don't make that date, a long cross country might not be wise. Orma Southfield, MI N110LR celebrating 20 years To the gathering or bust ------------------------------ Message: 3 Date: Thu, 26 Aug 2004 20:36:55 -0400 From: "Orma" Subject: KR> Turbo KR operators To: "KRnet" Message-ID: <002201c48bcd$f50db7d0$442bd445@ROBBINS1> Content-Type: text/plain; charset="iso-8859-1" Hello Net As I requested yesterday, I would also like to hear from all operators that have a homebuilt plane with a Volkswagen with a turbo. I want to know how you use and or control the boost in your plane. Orma Southfield, MI N110LR celebrating 20 years To the gathering or bust ------------------------------ Message: 4 Date: Thu, 26 Aug 2004 20:45:26 -0400 (Eastern Standard Time) From: "Dan Heath" Subject: KR> PlussBuss To: "krnet@mylist.net" Message-ID: <412E8426.000009.03364@COMPUTER> Content-Type: Text/Plain; charset="iso-8859-1" I bought a couple of "barrier" bars from Radio Shack to use for the Hot Buss ( PlussBuss ). Is it OK to use something like a #14 copper wire from a piece of housing wire, to connect one side together? They will be fixed and have no stress, but I want to be sure. If it is not OK, what are you doing for your PlussBuss? I need to know NOW, because I need to install it NOW, because I am ready to run wire this weekend. As always, thanks for your support. "There is a time for building and a time for GOING TO THE GATHERING, and the time for building has long since expired." See you in Mt. Vernon - 2004 - KR Gathering http://KRGathering.org See N64KR at http://KR-Builder.org - Then click on the pics Daniel R. Heath - Columbia, SC ------------------------------ Message: 5 Date: Thu, 26 Aug 2004 19:59:32 -0500 From: "Mark Jones" Subject: Re: KR> PlussBuss To: "KRnet" Message-ID: <00c801c48bd1$1d680ac0$6401a8c0@wi.rr.com> Content-Type: text/plain; charset="iso-8859-1" Dan, I did exactly the same for my plus buss and I even got mine at Radio Shack. Scroll down to the bottom right photo here: http://mywebpage.netscape.com/n886mj/inst.html Mark Jones (N886MJ) Wales, WI USA E-mail me at flykr2s@wi.rr.com Visit my KR-2S CorvAIRCRAFT web site at http://mywebpage.netscape.com/n886mj/homepage.html ----- Original Message ----- From: "Dan Heath" To: Sent: Thursday, August 26, 2004 7:45 PM Subject: KR> PlussBuss > I bought a couple of "barrier" bars from Radio Shack to use for the > Hot Buss > ( PlussBuss ). Is it OK to use something like a #14 copper wire from a piece > of housing wire, to connect one side together? They will be fixed and > have no stress, but I want to be sure. If it is not OK, what are you > doing for your PlussBuss? I need to know NOW, because I need to > install it NOW, because I am ready to run wire this weekend. > > As always, thanks for your support. > > "There is a time for building and a time for GOING TO THE GATHERING, > and the > time for building has long since expired." > > See you in Mt. Vernon - 2004 - KR Gathering http://KRGathering.org > > See N64KR at http://KR-Builder.org - Then click on the pics > > Daniel R. Heath - Columbia, SC > > > > > > > _______________________________________ > to UNsubscribe from KRnet, send a message to KRnet-leave@mylist.net > please see other KRnet info at http://www.krnet.org/info.html ------------------------------ Message: 6 Date: Thu, 26 Aug 2004 20:18:07 -0500 From: "Ron Eason" Subject: Re: KR> Turbo KR operators To: "KRnet" Message-ID: <00eb01c48bd3$b5b95980$6601a8c0@CADENGINEERING> Content-Type: text/plain; charset="iso-8859-1" I am using a Blowoff valve on the inlet manifold [compressor side] and a manual wastegate on the turbo side. Most modern turbo engines use protection like this for over when the load on the engine changes rapidly. [prop unloads, throttle changes and etc.]. I will have some photo when I finish the assembly. KRron ----- Original Message ----- From: "Orma" To: "KRnet" Sent: Thursday, August 26, 2004 7:36 PM Subject: KR> Turbo KR operators > Hello Net > > As I requested yesterday, I would also like to hear from all operators that have a homebuilt plane with a Volkswagen with a turbo. I want to know how you use and or control the boost in your plane. > > Orma > Southfield, MI > N110LR celebrating 20 years > To the gathering or bust > > > _______________________________________ > to UNsubscribe from KRnet, send a message to KRnet-leave@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > > ------------------------------ Message: 7 Date: Thu, 26 Aug 2004 20:25:19 -0500 From: "Ron Eason" Subject: Re: KR> Turbo KR operators To: "Ron Eason" , "KRnet" Message-ID: <000701c48bd4$b79465a0$6601a8c0@CADENGINEERING> Content-Type: text/plain; charset="iso-8859-1" ----- Original Message ----- From: "Ron Eason" To: "KRnet" Sent: Thursday, August 26, 2004 8:18 PM Subject: Re: KR> Turbo KR operators > I am using a Blowoff valve on the inlet manifold [compressor side] and > a manual wastegate on the turbo side. Most modern turbo engines use protection > like this for overboost when the load on the engine changes rapidly. [prop > unloads, throttle changes and etc.]. I will have some photo when I > finish the assembly. > > KRron > > ----- Original Message ----- > From: "Orma" > To: "KRnet" > Sent: Thursday, August 26, 2004 7:36 PM > Subject: KR> Turbo KR operators > > > > Hello Net > > > > As I requested yesterday, I would also like to hear from all > > operators > that have a homebuilt plane with a Volkswagen with a turbo. I want to know > how you use and or control the boost in your plane. > > > > Orma > > Southfield, MI > > N110LR celebrating 20 years > > To the gathering or bust > > > > > > _______________________________________ > > to UNsubscribe from KRnet, send a message to KRnet-leave@mylist.net > > please see other KRnet info at http://www.krnet.org/info.html > > > > > > > > _______________________________________ > to UNsubscribe from KRnet, send a message to KRnet-leave@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > > ------------------------------ Message: 8 Date: Thu, 26 Aug 2004 22:38:29 EDT From: TNCOMPRESSORMAN@aol.com Subject: Re: KR> Type 4 Engine Bulidup To: krnet@mylist.net Message-ID: <74.40b45efb.2e5ff8a5@aol.com> Content-Type: text/plain; charset="US-ASCII" In a message dated 8/26/04 8:33:29 PM Eastern Daylight Time, orma@aviation-mechanics.com writes: > Did you say 15 lbs of boost? > > Hay Scott, > Hold that horse. I said Boosted to 35" hg and the outside BP was > 30.01" hg. Earlier I was given the formula of " hg/0.491159. In this > case 4.99" hg/0.491159 = 10.1 PSI. The tying of the gate was tried > both open and closed as a test to see how the engine performs at both extremes. Orma, I think you are dividing the #s and should multiply instead. 4.99"hg X .491159 = 2.45psi. be careful 15psi boost (30.54"hg) manifold pressure of 60" could destroy your engine VERY quickly (seconds). I would try to keep manifold pressure under 40" (approx. 5psi) at all times. Turbo normalizing may be what you are looking to accomplish. i.e. 30" manifold pressure at 10,000'. However the engine would think its at sea level, the prop would unload and rpms would increase dramatically without a constant speed prop, not really feasible option with a vw. Just one opinion Riley Collins Rutledge, TN ------------------------------ Message: 9 Date: Thu, 26 Aug 2004 23:02:16 -0400 From: "Allen Wiesner " Subject: Re: KR> PlussBuss To: "KRnet" Message-ID: <001f01c48be2$43419de0$0000a398@CPQ69645694259> Content-Type: text/plain; charset="iso-8859-1" >I bought a couple of "barrier" bars from Radio Shack to >use for the >Hot Buss ( PlussBuss ). Is it OK to use >something like a #14 copper wire from a piece >of housing wire, to connect one side together? I'm not sure what you mean by "barrier" bars, But if you mean dual row barrier strips (R/S P/N's 274-656,8,9, & 670 for 2,4,6, & 8 position) then Radio Shack also has an 8-position jumper (P/N 274-650, $1.99). They can be shortened to the other sizes. Main advantage is that they are very flat and you can install terminals on top of them. I'm not sure, but the bigger stores may still carry them and they are available over the net. http://www.radioshack.com/category.asp?catalog%5Fname=CTLG&category%5Fname=CTLG%5F011%5F003%5F009%5F000&Page=1 Allen G. Wiesner KR-2SS/TD S/N 1118 & ex-RS store mgr. 65 Franklin Street Ansonia, CT 06401-1240 (203) 732-0508 flashyal@usadatanet.net ------------------------------ Message: 10 Date: Thu, 26 Aug 2004 23:05:57 -0400 From: "Orma" Subject: Re: KR> Type 4 Engine Bulidup To: "KRnet" Message-ID: <003f01c48be2$c73a1a00$442bd445@ROBBINS1> Content-Type: text/plain; charset="iso-8859-1" I think you are dividing the #s and should multiply instead. Thanks Riley for the correction. As for Turbo Normalizing, I really don't know. My KR has never been over 8000' and I personally don't like breathing thin air. Having the ability to go to 10K' or more is a nice thought. I really just want to make enough power to carry a passenger and have a decent climb rate. I can only guess at how much power the engine would make at 5 PSI boost. To get my 2366 cc engine to 100Hp would be super. In reality what ever increase I get will be good. Orma Southfield, MI N110LR celebrating 20 years To the gathering or bust ------------------------------ _______________________________________________ See KRnet list details at http://www.krnet.org/instructions.html End of KRnet Digest, Vol 346, Issue 91 ************************************** ================================== ABC Amber Outlook Converter v4.20 Trial version ==================================