---------------------------------------------------------- Rocket-List Digest Archive --- Total Messages Posted Tue 02/01/05: 10 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:21 AM - API's little intake elbow valve thingy (Frazier, Vincent A) 2. 07:49 AM - Re: API's little intake elbow valve thingy (Mlfred@aol.com) 3. 08:13 AM - Re: Valve (Frazier, Vincent A) 4. 08:34 AM - Re: Valve (Wernerworld) 5. 10:15 AM - Rocket Engine mods? (Chris Fordham) 6. 10:52 AM - Re: Rocket Engine mods? (Norman Younie) 7. 10:56 AM - Re: Re: Valve (Hr2pilot@aol.com) 8. 11:30 AM - Re: Rocket Engine mods? (Rhonda Bewley) 9. 12:26 PM - boost pumps (Bob J) 10. 04:21 PM - Re: Rocket Engine mods? (Ron C) ________________________________ Message 1 _____________________________________ Time: 07:21:54 AM PST US Subject: Rocket-List: API's little intake elbow valve thingy From: "Frazier, Vincent A" --> Rocket-List message posted by: "Frazier, Vincent A" SNIP Airflow performance can supply a little valve that goes into the elbow aft of the throttle body. This valve works to let some of the collected fuel out of the engine after shut down and I suppose it would probably let some collected water out. I have not found the need to install this valve on my Lycoming with the bendix throttle body. SNIP I have this little valve on the bottom of my intake elbow. My experience is that the Bendix system will burp out enough gas after shutdown to make a 8" diameter puddle on the concrete. It all comes out thru this little valve then out the overboard tube. With only 17 hours on mine so far, I can't hazard a guess as to how that much gas affects hot starts. Someone else can speculate on that. All I can say is that the little valve does work as intended. I suppose that it would work for water too... as long as the engine isn't running. Vince ________________________________ Message 2 _____________________________________ Time: 07:49:39 AM PST US From: Mlfred@aol.com Subject: Re: Rocket-List: API's little intake elbow valve thingy --> Rocket-List message posted by: Mlfred@aol.com In a message dated 2/1/2005 9:22:57 AM Central Standard Time, VFrazier@usi.edu writes: SNIP Airflow performance can supply a little valve that goes into the elbow aft of the throttle body. This valve works to let some of the collected fuel out of the engine after shut down and I suppose it would probably let some collected water out. I have not found the need to install this valve on my Lycoming with the bendix throttle body. SNIP I have this little valve on the bottom of my intake elbow. My experience is that the Bendix system will burp out enough gas after shutdown to make a 8" diameter puddle on the concrete. It all comes out thru this little valve then out the overboard tube. With only 17 hours on mine so far, I can't hazard a guess as to how that much gas affects hot starts. Someone else can speculate on that. All I can say is that the little valve does work as intended. I suppose that it would work for water too... as long as the engine isn't running. Vince Hi Guys and Gals: Let's consider the function of this valve: At shut down, there is fuel trapped inn the upper deck lines & flow divider. As the engine heat soaks, this fuel is heated, and expands to flow out of the injector nozzles. It then flows down the intake tubes, and either lays in the low spot (intake elbow) or flows out via the valve, or a vertical mounted fuel controller on some ships. Consider what this fuel turns into after 20-30 minutes of ~150F exposure if it can't run out either the valve or fuel controller....I seriously doubt it is combustible! So, when you crank the engine to re-start after fueling up, the engine has to digest this stuff first, before it can light off. Ugh.... At any rate, I've had 'em both ways (2 different Rockets), and it sure seems to me that the valve helps in this situation. It also helps your engine resist over-priming in the same manner: excess fuel is vented overboard. YMMV, of course. Carry on! Mark ________________________________ Message 3 _____________________________________ Time: 08:13:52 AM PST US Subject: Rocket-List: RE: Valve From: "Frazier, Vincent A" --> Rocket-List message posted by: "Frazier, Vincent A" http://www.usi.edu/science/chemistry/vfrazier/Engine%20and%20Prop.htm Main page, scroll 1/2 way down for gobs of pics. http://www.usi.edu/science/chemistry/vfrazier/2004-09-08/engine%20view%2 02.jpg best picture. The brass part is a 90 degree elbow, per Don Riveria, that connects to the blue valve from API. I put a short piece of aluminum tubing (not shown) after the valve. When I install the cowling, I attach a 8" piece of tygon tubing to the aluminum tubing. That is the overflow line. It attaches to a longer length of aluminum tubing that is RTV'ed to the bottom of the cowl and dumps the fuel overflow over the aft lip of the cowl. Vince -----Original Message----- From: Wernerworld [mailto:russ@wernerworld.com] Subject: Valve Hi Vince, Got any photos of the valve installed? Russ ________________________________ Message 4 _____________________________________ Time: 08:34:56 AM PST US From: "Wernerworld" Subject: Rocket-List: RE: Valve --> Rocket-List message posted by: "Wernerworld" I'm slowly getting edgamacated on this subject! Has anyone here tapped into an elbow from John? Do you need to weld a boss onto the elbow to get some extra thickness? John, where do you get your elbows from? Is it the same as the AFP 95 degreee one? Russ Park City ________________________________ Message 5 _____________________________________ Time: 10:15:45 AM PST US From: "Chris Fordham" Subject: Rocket-List: Rocket Engine mods? --> Rocket-List message posted by: "Chris Fordham" Hi I'm plugging away at my Harmon project here, in the backwoods of B.C. Just rivited one aileron last night so things are progressing! The question I have is that along with building the aircraft I managed to find and purchase a 0540 A1D5. The bottom end has been 0 timed by a good shop and a counterweighted crank installed to bring it to the same model as a c4b5. My questions are what easy (relatively) (less expensive) mods can I do to add a few extra horses. Some are high compression pistons, ram air inlet, electonic ignition, anyone have other suggestions? Also would anyone have rough idea what the Horsepower gain be using high compression pistons, electronic ignition, ram air? I am also looking for engine parts, induction tubes, injection lines, pushrod shrouds, oil and fuel lines ,baffels and a whole bunch more that I can't think of at the moment. Thanks Chris -do not archive - ________________________________ Message 6 _____________________________________ Time: 10:52:04 AM PST US From: Norman Younie Subject: Re: Rocket-List: Rocket Engine mods? --> Rocket-List message posted by: Norman Younie Get a hold of Bart at Progressive Air in Kamloops. 1-800-667-0522 . He'll tell you all you need to know about your engine. Chris Fordham wrote: >--> Rocket-List message posted by: "Chris Fordham" > >Hi > I'm plugging away at my Harmon project here, in the backwoods of B.C. Just rivited one aileron last night so things are progressing! The question I have is that along with building the aircraft I managed to find and purchase a 0540 A1D5. The bottom end has been 0 timed by a good shop and a counterweighted crank installed to bring it to the same model as a c4b5. My questions are what easy (relatively) (less expensive) mods can I do to add a few extra horses. Some are high compression pistons, ram air inlet, electonic ignition, anyone have other suggestions? Also would anyone have rough idea what the Horsepower gain be using high compression pistons, electronic ignition, ram air? > I am also looking for engine parts, induction tubes, injection lines, pushrod shrouds, oil and fuel lines ,baffels and a whole bunch more that I can't think of at the moment. > Thanks Chris > -do not archive - > > > > ________________________________ Message 7 _____________________________________ Time: 10:56:16 AM PST US From: Hr2pilot@aol.com Subject: Re: Rocket-List: RE: Valve --> Rocket-List message posted by: Hr2pilot@aol.com If you use the wiffel valve it well be open with the ram air open ________________________________ Message 8 _____________________________________ Time: 11:30:40 AM PST US Subject: RE: Rocket-List: Rocket Engine mods? From: "Rhonda Bewley" --> Rocket-List message posted by: "Rhonda Bewley" Chris - I would like to invite you to look at our website www.bpaengines.com. If you install BPA's cold air induction system, 9.5:1 compression pistons and an FM200, you'll get 295-300 hp. Marc Frederick had our Cold Air and 9.5:1 pistons in his engine at Reno this year. Not sure what he did for fuel system. The cold air system sells for $3995, pistons are $250 each. You can get the FM200 for about $2600. Rhonda Barrett-Bewley Barrett Performance Aircraft, Inc. 2870-B N. Sheridan Rd. Tulsa, OK 74115 (918) 835-1089 phone (918) 835-1754 fax www.bpaengines.com -----Original Message----- From: owner-rocket-list-server@matronics.com [mailto:owner-rocket-list-server@matronics.com] On Behalf Of Chris Fordham Subject: Rocket-List: Rocket Engine mods? --> Rocket-List message posted by: "Chris Fordham" Hi I'm plugging away at my Harmon project here, in the backwoods of B.C. Just rivited one aileron last night so things are progressing! The question I have is that along with building the aircraft I managed to find and purchase a 0540 A1D5. The bottom end has been 0 timed by a good shop and a counterweighted crank installed to bring it to the same model as a c4b5. My questions are what easy (relatively) (less expensive) mods can I do to add a few extra horses. Some are high compression pistons, ram air inlet, electonic ignition, anyone have other suggestions? Also would anyone have rough idea what the Horsepower gain be using high compression pistons, electronic ignition, ram air? I am also looking for engine parts, induction tubes, injection lines, pushrod shrouds, oil and fuel lines ,baffels and a whole bunch more that I can't think of at the moment. Thanks Chris -do not archive - ________________________________ Message 9 _____________________________________ Time: 12:26:24 PM PST US From: Bob J Subject: Rocket-List: boost pumps --> Rocket-List message posted by: Bob J Is anyone running a non-aircraft boost pump other than an AFP, dukes, or weldon? Like a Holley "blue" or some similar high-performance racing pump? I've been thinking about running a Holley "blue" pump along with an external bypass and checkvalve. For the life of me can't see anything wrong going that route as long as it can't restrict the fuel flow when off (which it can't if there's a bypass). Regards, Bob Japundza RV-6 flying, F1 building ________________________________ Message 10 ____________________________________ Time: 04:21:05 PM PST US From: "Ron C" Subject: RE: Rocket-List: Rocket Engine mods? --> Rocket-List message posted by: "Ron C" Chris- I have intake tubes, pushrod covers and rocker box covers but they are old and ugly. They would need to be stripped and painted to look decent. If interested email me at ronc@metropolisdesign.com ---------------------------------------------------- This mailbox protected from junk email by MailFrontier Desktop from MailFrontier, Inc. http://info.mailfrontier.com -----Original Message----- From: owner-rocket-list-server@matronics.com [mailto:owner-rocket-list-server@matronics.com] On Behalf Of Chris Fordham Subject: Rocket-List: Rocket Engine mods? --> Rocket-List message posted by: "Chris Fordham" Hi I'm plugging away at my Harmon project here, in the backwoods of B.C. Just rivited one aileron last night so things are progressing! The question I have is that along with building the aircraft I managed to find and purchase a 0540 A1D5. The bottom end has been 0 timed by a good shop and a counterweighted crank installed to bring it to the same model as a c4b5. My questions are what easy (relatively) (less expensive) mods can I do to add a few extra horses. Some are high compression pistons, ram air inlet, electonic ignition, anyone have other suggestions? Also would anyone have rough idea what the Horsepower gain be using high compression pistons, electronic ignition, ram air? I am also looking for engine parts, induction tubes, injection lines, pushrod shrouds, oil and fuel lines ,baffels and a whole bunch more that I can't think of at the moment. Thanks Chris -do not archive -