KR> Fuel primer
I have a Great Plains 1915 cc VW with an Ellison EFS-2 throttle body. I'm afraid I'm going to wear out the starter getting it going. I searched the archives, and the consensus seems to be having a primer injector for each manifold run. That means four injectors on this engine with the dual port heads. I'm considering a single primer injector just downstream of the throttle body. That would give me gas to start without a lot more plumbing. I would use an electrical valve, not a manual primer. Has anyone used such a system? What are your experiences and opinions? Jim Vance Claflin, Kansas Trying to start N 303 JV so I can get on with my taxi testing.
KR> Fuel primer
Jim Vance wrote: > I'm considering a single primer injector just downstream of the throttle > body. That would give me gas to start without a lot more plumbing. I > would use an electrical valve, not a manual primer.< Jim, I'm not sure if you have a primer installed yet or not, but it was my experience that without one, it won't start, no matter how warm it is. I don't know about the EFS-2, but the EFS-3 requires that on initial startup (first time ever) you need to suck on a little hole in the inlet (offset to the pilot's side) while the fuel pump is running, which will allow fuel to flow out the spraybar. That sets you up for first start. Use a piece of rubber or urethane tubing to do the sucking. I have one primer solenoid that splits in two, with one nozzle feeding each of the two intake runners on my engine. It works, but it's iffy sometimes when it's really cold. William Wynne set up a few where only one primer nozzle (make sure it's an official nozzle with the little orifice in it) goes into the main inlet between carb and runners, somewhere near the top before it splits. He says it works great. I plan to set mine up that way one of these days to see if that'll work for me. So to answer your question, go for it, and let me know how it works. If it doesn't work so well down low, you could always move it up higher. Mark Langford, Harvest, AL see homebuilt airplane at http://www.N56ML.com email to N56ML "at" hiwaay.net
KR> Fuel primer
Mark, Thanks for your prompt reply. I have ordered the solenoid from Wicks, but I'm having a problem coming up with a source for the injector nozzle. Where did you get yours? Jim
KR> Fuel primer
There are the 1/8" IPS holes in the intake manifold of a stock corvair that seem perfect for the primer. (If you did not mill them off) I had a system all made to that location but did not install in the finial completion of my plane as the aerocarb starts every time(except night before last) ;-) Joe Horton, Coopersburg, PA. joe.kr2s.buil...@juno.com On Sat, 22 Apr 2006 07:20:23 -0500 "Mark Langford" writes: > Jim Vance wrote: > > > I'm considering a single primer injector just downstream of the > throttle > > body. That would give me gas to start without a lot more > plumbing. I > > would use an electrical valve, not a manual primer.< > > Jim, > > I'm not sure if you have a primer installed yet or not, but it was > my > experience that without one, it won't start, no matter how warm it > is. I > don't know about the EFS-2, but the EFS-3 requires that on initial > startup > (first time ever) you need to suck on a little hole in the inlet > (offset to > the pilot's side) while the fuel pump is running, which will allow > fuel to > flow out the spraybar. That sets you up for first start. Use a > piece of > rubber or urethane tubing to do the sucking. > > I have one primer solenoid that splits in two, with one nozzle > feeding each > of the two intake runners on my engine. It works, but it's iffy > sometimes > when it's really cold. William Wynne set up a few where only one > primer > nozzle (make sure it's an official nozzle with the little orifice in > it) > goes into the main inlet between carb and runners, somewhere near > the top > before it splits. He says it works great. I plan to set mine up > that way > one of these days to see if that'll work for me. So to answer your > > question, go for it, and let me know how it works. If it doesn't > work so > well down low, you could always move it up higher. > > Mark Langford, Harvest, AL > see homebuilt airplane at http://www.N56ML.com > email to N56ML "at" hiwaay.net
KR> Fuel primer
I got mine out of the Aircraftspruce catalog Joe On Sat, 22 Apr 2006 08:04:55 -0500 "JIM VANCE" writes: > Mark, > > Thanks for your prompt reply. > > I have ordered the solenoid from Wicks, but I'm having a problem > coming up > with a source for the injector nozzle. Where did you get yours? > > Jim >
KR> Fuel primer
I had just two nozzles on the rear two cylinders and it started just fine. You can see how I did it here http://www.engalt.com/fuel1.htm about half way down the page. You can get all the parts you need here http://www.aircraftspruce.com/catalog/hapages/primerfittings.php I really like having the nozzles right by the head. They are more effective that way and are much less of a fire hazard. I do have them on the intake spider just above the carb on my Mustang where it normally goes on the O-200 and that works good also, but one of these days I am going to move them to the plugged holes where the fuel injectors normally go when you have the fuel injected engine. Brian Kraut Engineering Alternatives, Inc. www.engalt.com -Original Message- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On Behalf Of JIM VANCE Sent: Saturday, April 22, 2006 7:55 AM To: krnet Subject: KR> Fuel primer I have a Great Plains 1915 cc VW with an Ellison EFS-2 throttle body. I'm afraid I'm going to wear out the starter getting it going. I searched the archives, and the consensus seems to be having a primer injector for each manifold run. That means four injectors on this engine with the dual port heads. I'm considering a single primer injector just downstream of the throttle body. That would give me gas to start without a lot more plumbing. I would use an electrical valve, not a manual primer. Has anyone used such a system? What are your experiences and opinions? Jim Vance Claflin, Kansas Trying to start N 303 JV so I can get on with my taxi testing. ___ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> Fuel primer
Jim Vance wrote: > I have ordered the solenoid from Wicks, but I'm having a problem coming up > with a source for the injector nozzle. Where did you get yours? Also from Wicks: http://www.wicksaircraft.com/catalog/product_cat.php/subid=858/index.html and you'll also need http://www.wicksaircraft.com/catalog/product_cat.php/subid=920/index.html , which should be silver soldered (possible with a propane torch) to solder the "code fittings" to the 1/8" copper line. I agree with Brian that the closer to the carb you put the nozzle, the greater the fire hazard. Mine go directly into the intake manifold "log" that we have on the Corvair, so no chance of that, but that way I'm not feeding all six cylinders either. Everything's a compromise. Erring on the side of safety is probably not a bad idea... Mark Langford, Harvest, AL see homebuilt airplane at http://www.N56ML.com email to N56ML "at" hiwaay.net
KR> Fuel primer
and you'll also need the nut that's shown in the photo at http://www.wicksaircraft.com/catalog/images/subcategories/920_c.jpg , which is a standard 5/16"x32 "b-nut" or something similar to hold the code fitting to the primer nozzle. Here's the number for that one, while you're ordering: http://www.wicksaircraft.com/catalog/product_cat.php/subid=927/index.html Mark Langford, Harvest, AL see homebuilt airplane at http://www.N56ML.com email to N56ML "at" hiwaay.net
KR> Fuel primer
This is exactly where my primer connections are made. I have never had any problem with the prime entering the intakes at these locations. Works first time every time. Mark Jones (N886MJ) Wales, WI USA E-mail me at flyk...@wi.rr.com Visit my NEW KR-2S CorvAIRCRAFT web site at www.flykr2s.com - Original Message - From: "Joseph H. Horton" To: Sent: Saturday, April 22, 2006 8:02 AM Subject: Re: KR> Fuel primer > There are the 1/8" IPS holes in the intake manifold of a stock corvair > that seem perfect for the primer. (If you did not mill them off) I had a > system all made to that location but did not install in the finial > completion of my plane as the aerocarb starts every time(except night KRnet info at http://www.krnet.org/info.html
