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 08-25-2013, 12:11 AM
ao.frog ao.frog is offline
 
Join Date: Sep 2006
Location: Manstad, Norway
Posts: 855
Default Where to install the engine ground connection on a IO-360 Lyc?

Hi gang.

I'm wondering where you all have installed the ground connection on the engine?

One end of the ground cable goes to the battery, so that's easy, but where on the engine do I connect the other end?

On my first 7, the engine manual (Extreem IO-360) showed where to install the ground connection, but on my new -7, the Lycoming manual doesn't show any main ground at all, as far as I can see.

So, instead of guessing any further, I ofcourse put up a post on this great forum.
__________________
Regards Alf Olav Frog / Norway
First RV-7 completed, (bought partly finished from a US-builder) 305 hrs per July 2014, SOLD
Second -7 had first flight Feb 25th 2014. 100 hrs pr Jan 2016. Life is good!
VAF 2016 dues paid
Reply With Quote
  #2  
Old 08-25-2013, 04:49 AM
dav1111 dav1111 is offline
Super Moderator
 
Join Date: Jan 2005
Location: Lubbock, Texas
Posts: 634
Default

Instead of grounding to the battary you might just consider grounding directly to the firwall as I assume you have or will install a ground bus on the firewall to run most of your grounds. I installed a back to back ground bus inside and outside of my firewall and ran the engine ground to the post holding the ground bus in place on one side and ran the battary ground to the post on the other side of the ground block.

The engine side of the ground bus can be installed on almost any nut on the back side of the engine that is handy. Just make sure the the ground strap has a little play for vibration purposes.
__________________
Russ Daves
Lubbock, TX
Proud to be a Veteran
N710RV - RV-10 Flying
N65RV - RV-6A Sold
N686RV - RV-6A Re-Built, Sold
N742PZ - RV-8 Co-Builder Sold
N-867RV -RV-7 Finish Kit
VAFWWW Dues Paying Member
Reply With Quote
  #3  
Old 08-25-2013, 07:03 AM
crabandy crabandy is offline
 
Join Date: Jan 2010
Location: Ottawa, Ks
Posts: 1,730
Default

Found a pic on google, there is a lug just above the lower engine mount on both sides. I bolted my ground strap to the lug on the right side just above the lower mount slightly rearward of the oil dipstick. It's my understanding that any bolt on the back of the engine can work, but its best to use the lug on the case


Last edited by crabandy : 08-25-2013 at 07:42 AM. Reason: added pic
Reply With Quote
  #4  
Old 08-26-2013, 08:43 PM
OLDSAM OLDSAM is offline
 
Join Date: Feb 2008
Location: Tucker GA
Posts: 190
Default Be sure it is big enough

If you do install a ground conductor from the engine to the airframe, remember that it has to be large enough to carry the current required by the starter motor, as do the terminals at each end where it connects to the engine crankcase and to the firewall
__________________
OldSam
RV7A, Empennage, Wings & Tanks complete
Fuse under way
Reply With Quote
  #5  
Old 08-28-2013, 12:21 PM
VETE76 VETE76 is offline
 
Join Date: Feb 2007
Location: syracuse ny/venice fl
Posts: 602
Default

my friends rv7 w/lyc io360was very hard starting. we had a tech counsler come over and he asked to see the engine ground strap. so we took the cowl off and showed him. he asked us to unbolt it, we did, he looked at he place we bolted the wire to, he asked whats all this engine paint doing here? remove it. we did. engine spun over much much faster and started right away. never a problem again! food for thought.
Reply With Quote
  #6  
Old 08-28-2013, 03:09 PM
bruceh's Avatar
bruceh bruceh is offline
 
Join Date: Mar 2008
Location: Ramona, CA
Posts: 1,865
Default

I got my engine (IO-320) grounded to the firewall (one of the lugs on the forest of tabs ground block on the interior side). The other lug on the firewall will connect to the negative side of the battery. I used 2AWG welding cable and connected it to the vacuum pump accessory location.

__________________
Bruce Hill
RV-9A N5771H now FLYING!
http://www.overthehills.com/RV-9A-Project
APRS Tracking for KJ6YRP and New Flying Blog
2016 VAF donator
EAA Tech Counselor
Reply With Quote
  #7  
Old 04-07-2017, 11:41 AM
rv8ch rv8ch is offline
 
Join Date: Feb 2005
Location: LSGG
Posts: 1,926
Default ground strap

Quote:
Originally Posted by bruceh View Post
I got my engine (IO-320) grounded to the firewall (one of the lugs on the forest of tabs ground block on the interior side). The other lug on the firewall will connect to the negative side of the battery. I used 2AWG welding cable and connected it to the vacuum pump accessory location.

Hi Bruce, did you end up staying with this location? Looks pretty clean to me.
__________________
Mickey Coggins
http://rv8.ch
Reply With Quote
  #8  
Old 04-07-2017, 12:55 PM
RV7A Flyer's Avatar
RV7A Flyer RV7A Flyer is offline
 
Join Date: Jul 2013
Location: US
Posts: 1,130
Default

Quote:
Pretty much exact same setup, but used braided grounding strap (forget which vendor I got it from)...works great, easy to inspect pre-flight.
Reply With Quote
  #9  
Old 04-07-2017, 12:59 PM
snopercod's Avatar
snopercod snopercod is offline
 
Join Date: Aug 2016
Location: Asheville, NC
Posts: 449
Default starter pad

I ran mine up front to the starter pad. That's where the heavy load is.
__________________
(2017 dues paid)
Reply With Quote
  #10  
Old 04-07-2017, 01:32 PM
gyoung's Avatar
gyoung gyoung is offline
 
Join Date: Jan 2005
Location: Spring, TX
Posts: 125
Default

Quote:
Originally Posted by RV7A Flyer View Post
Pretty much exact same setup, but used braided grounding strap (forget which vendor I got it from)...works great, easy to inspect pre-flight.
Same here. Got the strap & terminals from Stein. Easy to crimp on #2 terminals.
__________________
Greg

1950 Navion - flying
RV-6 - 15 yrs and 96.3% done
3.5 L-2 projects on deck
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 03:47 PM.


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.