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Firewall pass throughs - fuel lines

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wdaniell.longport(at)gmai
Guest

Posted: Wed Mar 19, 2014 10:15 am Post subject: Firewall pass throughs - fuel lines

Dear all

 the instructions for electrical stuff are straightforward so no problem there.

 What about the fuel lines?  How have the group passed these through the firewall?  I thought of passing them underneath the firewall perhaps... tied to the engine frame rather than actually through.

 



I am using automotive injection tubing and I know that fuel lines have to have heat shield forward of the firewall.

 



thanks 

Will

 



William Daniell



LONGPORT

+57 310 295 0744

 

  [quote][b]

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rparigoris

Joined: 24 Nov 2009
Posts: 806

Posted: Wed Mar 19, 2014 12:16 pm Post subject: Firewall pass throughs - fuel lines

Hi Will 

 	How have the group passed these through the firewall? 

 	Here is how I did it 

 	http://www.europaowners.org/main.php?g2_itemId=86925 

 	  

 	Ron Parigoris    [quote][b]

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wdaniell.longport(at)gmai
Guest

Posted: Wed Mar 19, 2014 4:43 pm Post subject: Firewall pass throughs - fuel lines

Ron thanks

Will



 William Daniell



LONGPORT

+57 310 295 0744

 



On Wed, Mar 19, 2014 at 3:11 PM,  <rparigor(at)suffolk.lib.ny.us (rparigor(at)suffolk.lib.ny.us)> wrote:

[quote] 

 	Hi Will 

 	How have the group passed these through the firewall? 

 	Here is how I did it 

 	http://www.europaowners.org/main.php?g2_itemId=86925 

 	  

 	Ron Parigoris     	  Quote: 	
		  



arget="_blank">http://www.matronics.com/Navigator?Europa-List

tp://forums.matronics.com

_blank">http://www.matronics.com/contribution



	
[b]

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Fred Klein

Joined: 26 Mar 2012
Posts: 503

Posted: Wed Mar 19, 2014 5:15 pm Post subject: Firewall pass throughs - fuel lines

On Mar 19, 2014, at 11:09 AM, William Daniell <wdaniell.longport(at)gmail.com (wdaniell.longport(at)gmail.com)> wrote:

 	  Quote: 	
		  What about the fuel lines?  How have the group passed these through the firewall? 

	




Will…I too used automobile injection hose aft…here’s how I penetrated the firewall and transitioned to SS jacketed flex hose forward…Good luck, Fred





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wdaniell.longport(at)gmai
Guest

Posted: Fri Mar 21, 2014 5:35 am Post subject: Firewall pass throughs - fuel lines

Fred thanks

I guess I was hoping for a straight connection without the fittings...but that looks really neat.

 Will



William Daniell



LONGPORT

+57 310 295 0744

  



On Wed, Mar 19, 2014 at 8:10 PM, Fred Klein <fklein(at)orcasonline.com (fklein(at)orcasonline.com)> wrote:

 	  Quote: 	
		   

On Mar 19, 2014, at 11:09 AM, William Daniell <wdaniell.longport(at)gmail.com (wdaniell.longport(at)gmail.com)> wrote:



 	  Quote: 	
		   What about the fuel lines?  How have the group passed these through the firewall? 

 	




Will&hellip;I too used automobile injection hose aft&hellip;here&rsquo;s how I penetrated the firewall and transitioned to SS jacketed flex hose forward&hellip;Good luck, Fred





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Fred Klein

Joined: 26 Mar 2012
Posts: 503

Posted: Fri Mar 21, 2014 7:05 am Post subject: Firewall pass throughs - fuel lines

On Mar 21, 2014, at 6:32 AM, William Daniell <wdaniell.longport(at)gmail.com (wdaniell.longport(at)gmail.com)> wrote:

 	  Quote: 	
		  I guess I was hoping for a straight connection without the fittings...but that looks really neat. 	




Will…bear in mind that mine is for a non-Rotax engine installation…the 90 degree fittings worked best.

Note that the fittings are aluminum Aeroquip…I’ve received a comment from one lister cautioning me against using aluminum fittings FWF on all fuel and oil lines, recommending brass (at the least) and preferably steel. 

Such a practice was news to me…additional comments welcome and invited.

Fred

 [quote][b]

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davidjoyce(at)doctors.org
Guest

Posted: Fri Mar 21, 2014 9:44 am Post subject: Firewall pass throughs - fuel lines

Fred, Any sort of fitting adds weight and leakage 

possibility. Going straight through the firewall with the 

hoses immobilised on both sides, with the passage sealed 

by silicone adds nil weight ,no leakage possibility and 

works in the sense that having already replaced hoses 

twice on a five year life basis, the pipes showed no sign 

of chafing wear. Why complicate things?

Regards, David.

On Fri, 21 Mar 2014 08:01:29 -0700

  Fred Klein <fklein(at)orcasonline.com> wrote:

 	  Quote: 	
		   

 On Mar 21, 2014, at 6:32 AM, William Daniell 

<wdaniell.longport(at)gmail.com> wrote:

 

> I guess I was hoping for a straight connection without 

>the fittings...but that looks really neat.

 

 Will…bear in mind that mine is for a non-Rotax engine 

installation…the 90 degree fittings worked best.

 

 Note that the fittings are aluminum Aeroquip…I’ve 

received a comment from one lister cautioning me against 

using aluminum fittings FWF on all fuel and oil lines, 

recommending brass (at the least) and preferably steel. 

 

 Such a practice was news to me…additional comments 

welcome and invited.

 

Fred

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Fred Klein

Joined: 26 Mar 2012
Posts: 503

Posted: Fri Mar 21, 2014 3:00 pm Post subject: Firewall pass throughs - fuel lines

On Mar 21, 2014, at 10:43 AM, David Joyce <davidjoyce(at)doctors.org.uk (davidjoyce(at)doctors.org.uk)> wrote:

 	  Quote: 	
		  Any sort of fitting adds weight and leakage possibility. Going straight through the firewall with the hoses immobilised on both sides, with the passage sealed by silicone adds nil weight ,no leakage possibility and works in the sense that having already replaced hoses twice on a five year life basis, the pipes showed no sign of chafing wear. Why complicate things? 	




David,

Thanks for the description of your installation as well as your report of trouble-free operation over a ten year period…yours is simplicity itself, and I salute you for it while I also admit to envy of your accumulating all the hours of airtime which you have while my kit remains in my workshop.

 	  Quote: 	
		   	  Quote: 	
		  Why complicate things? 	
	




I suspect that one person’s “complication” may be another’s sense of “proper kit”, both being subjective assessments for dealing w/ the task at hand, whatever it may be…and...a reflection of one’s “comfort zone”. 

In my case, I recall a sense of discomfort at the thought of simply running a rubber hose w/ fuel under high pressure through the firewall…I was also keen on matching the FWF SS jacketed fuel line which my engine supplier had already used connecting the injector rails…the firewall seemed like the logical place for the transition, and the weight of the aluminum fittings was not a detriment for me. 

As my fuel lines are under high pressure for a fuel-injected engine with the pumps located aft, I paid little attention to the build manual references to routing of the low pressure fuel lines for the Rotax engine, relying instead on an old dog-eared copy of an EAA publication, “Firewall Forward” by Tony Bingelis.

What I’ve done made perfect sense to me at the time the work was being done…

Cheers,

Fred



 [quote][b]

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davidjoyce(at)doctors.org
Guest

Posted: Fri Mar 21, 2014 3:26 pm Post subject: Firewall pass throughs - fuel lines

Fred, One thing I should have mentioned is that I have the 

Singleton firewall mod, which replaces the stainless steel 

with a thickish heat resistant fibreglass. That is of 

course a whole lot less likely to traumatise a rubber hose 

than stainless steel, but if I had the stainless steel 

original firewall I would still be tempted to try to make 

holes with a turned smooth edge or to get a large grommet 

so as to still avoid extra connectors. But that is all 

largely irrelevant, I guess with your fuel injected, high 

pressure system!

Regards, David Joyce, G-XSDJ

On Fri, 21 Mar 2014 13:59:28 -0700

  Fred Klein <fklein(at)orcasonline.com> wrote:

 	  Quote: 	
		   

 On Mar 21, 2014, at 10:43 AM, David Joyce 

<davidjoyce(at)doctors.org.uk> wrote:

 

> Any sort of fitting adds weight and leakage possibility. 

>Going straight through the firewall with the hoses 

>immobilised on both sides, with the passage sealed by 

>silicone adds nil weight ,no leakage possibility and 

>works in the sense that having already replaced hoses 

>twice on a five year life basis, the pipes showed no sign 

>of chafing wear. Why complicate things?

 

 David,

 

 Thanks for the description of your installation as well 

as your report of trouble-free operation over a ten year 

period…yours is simplicity itself, and I salute you for 

it while I also admit to envy of your accumulating all 

the hours of airtime which you have while my kit remains 

in my workshop.

 

>> Why complicate things?

 

 I suspect that one person’s “complication” may be 

another’s sense of “proper kit”, both being subjective 

assessments for dealing w/ the task at hand, whatever it 

may be…and...a reflection of one’s “comfort zone”. 

 

 In my case, I recall a sense of discomfort at the 

thought of simply running a rubber hose w/ fuel under 

high pressure through the firewall…I was also keen on 

matching the FWF SS jacketed fuel line which my engine 

supplier had already used connecting the injector 

rails…the firewall seemed like the logical place for the 

transition, and the weight of the aluminum fittings was 

not a detriment for me. 

 

 As my fuel lines are under high pressure for a 

fuel-injected engine with the pumps located aft, I paid 

little attention to the build manual references to 

routing of the low pressure fuel lines for the Rotax 

engine, relying instead on an old dog-eared copy of an 

EAA publication, “Firewall Forward” by Tony Bingelis.

 

 What I’ve done made perfect sense to me at the time the 

work was being done…

 

 Cheers,

 

Fred

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