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Fuel Injection Systems: Precision Airmotives "Silver Hawk EX" vs. Airflow Performance's "FM-150"

Posted By:
Dale Robertson
Young Eagles Pilot or Volunteer
10
Posts
0
#1 Posted: 4/21/2011 04:15:50

 Have we got any users out there of either system, or even familiar with them? 

I've got a Lyc. O-360 that just had a "top-end" job done, and feel now's the time to make other changes as well.  It had a Marvel carb on it, but have been looking at F.I. options to expand my means of aerobatic maneuvers.  I have decided to go with a system that simply routes the induction air up through the  "up-draft" oil sump, currently in place, vs. a ram air "Cold Air Induction" system.  As the advantages of cold air induction are not all that great,  when comparing the expense involved.  I would appreciate any pro's or con's on either system, and, any input on how one may have adapted an air-filter/air-box.  How about the use of a 90 deg. elbow off the sump, to mount the fuel controller/servo on?  Maybe someone has a better idea, and/or a better place to look for more possibilities?  Thanks to all!



'82 "Duster2"
Neil Sidders
Homebuilder or Craftsman
50
Posts
11
#2 Posted: 4/21/2011 21:44:09

I have an Ellison on my Acro Sport II and only have ground runs on it so far but it seems fine.  A buddy has an Ellison on the 360 in his Ultimate 200 and is sold on it .  He has been flying it for a long time, trouble free.  In the shop we have a Glasair with a sump like yours and an elbow to face the injector forward.  I think it is an airflow unit.  The Silver Hawk seems fine as well, but I'm not sure if it is still being made.  The Ellison doesn't like ram air, but it uses the 6-7 pound fuel pump that feeds a carb so the pump you have now would be all you need.  It does require a primer to start. 

This has been discussed at length from time to time on <Biplaneforum.com>



Torello Tacchi
Homebuilder or Craftsman
4
Posts
1
#3 Posted: 4/21/2011 22:03:47 Modified: 4/21/2011 22:07:01

Just did taxi work on my RV10.  The engine was a carburated (yuk) 540, and not has Airflow Performce FI.  It;s simple  and easily adjustable (though rarely)  It's basically a revampted Bendix system.  Used their pump/filtering system as well.   The best part is the support.  The servo can be mounted anyway desired, either to the typical bottom of the sump, or with an elbow.  Van's provided an excellent air filter, so for my own installation it was simple.  I'm sure Van's would be happy to sell you one of his air filter system if you needed one.

TT

 



Dale Robertson
Young Eagles Pilot or Volunteer
10
Posts
0
#4 Posted: 4/22/2011 02:50:56

This is excellent information being sent to me, and more is welcomed.  The "Silver Hawk" is still produced & I have spoke with a rep at Precision Airmotive about them.  G & N Aircraft is one of the the distributors that puts kits together for sell, reasonably priced at that.  I have not checked into an Ellison yet, but will explore that option as well.  Thanks for the other "forum" site also.  Keep 'em coming, it's great insight!    Dale



'82 "Duster2"
Louis Bigelow
Homebuilder or Craftsman
8
Posts
1
#5 Posted: 4/22/2011 21:25:14

how about another route. modern fuel injection and ignition..

http://www.flyefii.com/

Lou



Jeremy Fisher
Homebuilder or Craftsman
1
Post
0
#6 Posted: 5/9/2011 12:01:41

I am flying with a Precision AIrmotive Eagle engine management system, which combines ignition and mixture control through dual computers.  It is not inexexpensive, but the support from the company is exceptional, and it can be reprogrammed to meet your needs.  I initially had overheating problems with my installation and they enabled me to vary both mixture and timing while I sorted it out.  Definitely recommended..