VansAirForceForums  
Home > VansAirForceForums

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

- Today's Posts | Insert Pics


Go Back   VAF Forums > Main > RV General Discussion/News
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 12-09-2009, 11:00 AM
Radomir's Avatar
Radomir Radomir is offline
 
Join Date: Jan 2005
Location: Charlotte, NC
Posts: 1,523
Default Mixture firewall penetration (RV-7A)

I searched the forum and did not find much *useful* info... You'd think everything's well covered by now

I'm converting from carb to F.I. (*vertical* induction) and need to figure out best place to drill a hole in the firewall for the mixture cable. (this is on my -7A) I am using the VA-182 bracket. Any suggestions? Would drilling a hole right next to the throttle work? Do you need a longer cable then (I have both on hand)

I have to consider a possible interference with the Weldon pump, which will be installed in same place as the old Facet pump (just different angle)..

Would love to see/hear what worked for you...
__________________
Radomir
RV-7A sold
Reply With Quote
  #2  
Old 12-09-2009, 02:28 PM
dhall_polo's Avatar
dhall_polo dhall_polo is offline
 
Join Date: Nov 2006
Location: Cumming, GA
Posts: 610
Default

I've got some pics and notes that will be useful for you...

http://donka.net/gallery/rv7_engine?page=5
__________________
Don Hall
N517DG - RV7 - Flying!
Ticked Van's Hobbes meter at #6110, 3/7/09
Reply With Quote
  #3  
Old 12-09-2009, 03:03 PM
Radomir's Avatar
Radomir Radomir is offline
 
Join Date: Jan 2005
Location: Charlotte, NC
Posts: 1,523
Default

Thanks Don... saw those.. but it's definitely more challenging for us blessed with the nosewheel Your cable goes right through the area that's blocked by the nose gear socket on my plane..
__________________
Radomir
RV-7A sold
Reply With Quote
  #4  
Old 12-09-2009, 03:35 PM
boom3's Avatar
boom3 boom3 is offline
 
Join Date: Dec 2006
Location: Sumner, WA
Posts: 722
Default

I think Bob Collins went full circle on this issue so maybe he'll pipe in. I'm going to be in the same boat soon and curious what he and others ended up doing.
__________________
Jeff Bloomquist
Sumner, WA
PP-ASEL, IR

RV-7A
Flying
1150 Hours
Reply With Quote
  #5  
Old 12-09-2009, 06:02 PM
Bavafa Bavafa is offline
 
Join Date: Oct 2007
Location: Sacramento, CA
Posts: 3,351
Default

Vans recommended location works great and the length of the cable is just right for that location. It is about 4.5" from the top rivets on the FW and 10.5" from to the right of the left side of the FW. This is on page DWG 19

Mehrdad
RV7A - IO360M1B
Reply With Quote
  #6  
Old 12-09-2009, 06:10 PM
LifeofReiley's Avatar
LifeofReiley LifeofReiley is offline
 
Join Date: Jan 2005
Location: Round Rock, TX
Posts: 3,778
Default Yep...

the location is in the plans and works well.
__________________
Reiley
Retired N622DR - Serial #V7A1467
VAF# 671
Repeat Offender / Race 007
Friend of the RV-1
Reply With Quote
  #7  
Old 12-09-2009, 08:29 PM
Radomir's Avatar
Radomir Radomir is offline
 
Join Date: Jan 2005
Location: Charlotte, NC
Posts: 1,523
Default

Is that the one that's about 3" inboard of the prop governor cable? I saw that one, but I was under impression that one was for horizontal induction.. not vertical... I may be wrong though..

Can someone confirm?
__________________
Radomir
RV-7A sold
Reply With Quote
  #8  
Old 12-09-2009, 08:45 PM
LifeofReiley's Avatar
LifeofReiley LifeofReiley is offline
 
Join Date: Jan 2005
Location: Round Rock, TX
Posts: 3,778
Default

I emailed you a pic of Dan C's firewall setup... I know it's a dragger but will be close.

-d-


Quote:
Originally Posted by Radomir View Post
Is that the one that's about 3" inboard of the prop governor cable? I saw that one, but I was under impression that one was for horizontal induction.. not vertical... I may be wrong though..

Can someone confirm?
__________________
Reiley
Retired N622DR - Serial #V7A1467
VAF# 671
Repeat Offender / Race 007
Friend of the RV-1
Reply With Quote
  #9  
Old 12-11-2009, 02:37 PM
n567vb n567vb is offline
 
Join Date: Feb 2008
Location: MN
Posts: 77
Default

Quote:
Originally Posted by dhall_polo View Post
I've got some pics and notes that will be useful for you...

http://donka.net/gallery/rv7_engine?page=5
Hi Don,

I installed my mixture cable the exact same way you did. I even have the same throttle body and my engine is the same color! :-).

Did you have any issue with the cowling and the airbox? I heard some report that just bending the bracket resulted in the airbox not aligning with the cowling, although it sounds like a spacer between the airbox and the throttle body would solve that.

Thank
Vince
RV-7
Reply With Quote
  #10  
Old 12-12-2009, 12:28 AM
dhall_polo's Avatar
dhall_polo dhall_polo is offline
 
Join Date: Nov 2006
Location: Cumming, GA
Posts: 610
Default

Quote:
Originally Posted by n567vb View Post
Hi Don,

I installed my mixture cable the exact same way you did. I even have the same throttle body and my engine is the same color! :-).

Did you have any issue with the cowling and the airbox? I heard some report that just bending the bracket resulted in the airbox not aligning with the cowling, although it sounds like a spacer between the airbox and the throttle body would solve that.

Thank
Vince
RV-7
Cool, another blue engine. I'm sure you'll find it is much more powerful than the gray lycomings. That's my story, and I'm sticking to it.

I have not had any issues in this area, now with ~110 hrs. IIRC, the Van's bracket is shaped assuming a reverse throw mixture control on the fuel servo. If you have that reverse throw servo you have to modify the airbox, essentially building a notch into it. If you have the servo with the forward throw mixture like mine, you *must* bend the bracket and no mods are required for the airbox. I think the forward throw mixture is the better configuration for the rv7 with vertical-io, but both work. Jamie Painter has the opposite mixture throw to mine, and both our planes are doing fine.

When you build up the airbox, the instructions take you through the process of aligning with the ram intake and the cowl sides. I more or less just followed those instructions, and it all worked out.

Good luck and post some pics of that engine!

Don
__________________
Don Hall
N517DG - RV7 - Flying!
Ticked Van's Hobbes meter at #6110, 3/7/09
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 08:29 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.