VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics



Go Back   VAF Forums > Model Specific > RV-7/7A
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 09-18-2009, 11:18 PM
jrvssgl jrvssgl is offline
 
Join Date: Oct 2007
Location: Oyen, Alberta
Posts: 154
Default Conversion 0-360 to IO-390 What has to be done.

I need an inverted oil and fuel system. Does anyone have a good reference to a pressure carburater that works well or do I need Fuel Injection. I actually have been dreaming about having another 30 horses under the cowl, and maybe even switching out the entire engine to an I0-390. Now the questions for anyone who really knows begins. I know forsure that I have to change the configuration of my bottom cowl for fuel injection, however would the top cowl be usable or is the size actually different on the 390. I am currently running a two blade BF Hartzel Prop from Vans that is good for the 200 hp IO-360. Is this prop accepteble on a 390 or does this need to be changed as well. Engine Mount is it the same as the O-360? What all else would have to be changed besides baffles and all the little insignif's? Any help apprecieted.
Reply With Quote
  #2  
Old 09-19-2009, 08:48 PM
deene deene is offline
 
Join Date: Jan 2005
Posts: 290
Default

No real usable pressure carbs available for Lyc's, so FI is the only option.

390's have basically the same case as 360's so no change except cyl's are about 1/4" wider on each side, so baffles, exhaust, and plenum change. Governor is also on front of case. Motor mount is same.

As far as the prop, check the Hartzell prop info spreadsheet on VAF. If my memory holds, the later BA prop blade (7497) is recommended for the 390. I have the 7496 blade set on my 390 and thus have a yellow band from 2000 to 2300 rpm.

I really like my 390...
__________________
Deene Ogden.
RV8 QB, IO-390X, BA prop...SOLD
RV12 ready for engine
EAA Tech Counselor/Flight Advisor
CFII, MEI, CFIG
Reply With Quote
  #3  
Old 09-20-2009, 04:04 PM
penguin penguin is offline
 
Join Date: Jan 2005
Location: England
Posts: 878
Default

Quote:
Originally Posted by jrvssgl View Post
I need an inverted oil and fuel system. Does anyone have a good reference to a pressure carburater that works well or do I need Fuel Injection. I actually have been dreaming about having another 30 horses under the cowl, and maybe even switching out the entire engine to an I0-390. Now the questions for anyone who really knows begins. I know forsure that I have to change the configuration of my bottom cowl for fuel injection, however would the top cowl be usable or is the size actually different on the 390. I am currently running a two blade BF Hartzel Prop from Vans that is good for the 200 hp IO-360. Is this prop accepteble on a 390 or does this need to be changed as well. Engine Mount is it the same as the O-360? What all else would have to be changed besides baffles and all the little insignif's? Any help apprecieted.
All pressure carbs are old, so FI is really the only way ahead

Although an IO-390 uses a similar case to an O-360 (so same engine mount), that's about where the similarities stop! Completely different cylinders (angle valve against parallel valve), and I think more stroke on the crank. Top cowl will be the same, and you may be able to chop the bottom cowl to fit (or buy new), but baffling will have to be mostly replaced. May also need a different oil cooler. Don't know about props - you may have to ask Hartzell.

If you work on an completely new engine install then anything you can re-use will be a bonus!

Pete
Reply With Quote
  #4  
Old 09-20-2009, 04:17 PM
Garage Guy's Avatar
Garage Guy Garage Guy is offline
 
Join Date: Mar 2008
Location: San Diego
Posts: 457
Default

Quote:
Originally Posted by jrvssgl View Post
Does anyone have a good reference to a pressure carburater that works well or do I need Fuel Injection.
Some folks seem to have success with the Ellison throttle body type setup:
http://www.ellison-fluid-systems.com/
http://www.rotecradialengines.com/TBI/TBI.htm

A search will turn up some threads here on VAF about these.

--Paul
Reply With Quote
  #5  
Old 09-21-2009, 12:09 PM
MCA's Avatar
MCA MCA is offline
 
Join Date: Jun 2005
Posts: 528
Default

Recommend you talk with Rhonda at BPA http://www.bpaengines.com/

Some info here might be helpful too: www.io-390.com
__________________
Marc Ausman
www.verticalpower.com. Take a look at the VP-X here.
Start planning your electrical system now.
RV-7 Flying 800+ hours, IO-390
Albuquerque, NM
EAA Director
Reply With Quote
  #6  
Old 09-21-2009, 04:14 PM
jrvssgl jrvssgl is offline
 
Join Date: Oct 2007
Location: Oyen, Alberta
Posts: 154
Default

Thanks for the responses. I may give Rhonda a call as well at Barrett, however after some more research I am leaning towards the IO-375 because of price and from what I understand after talking to Bart at Aero Sport Power the IO-375 is the same in size and shape and the only modifications I will have to do is for the throttle and mixture cables. To me it almost sounds to simple. Are there any flyers that can leave some comments as to how the 375 is performing and what there thoughts are on this engine. Thanks again.
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 06:40 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.