Aero filler fitting

[Hampshire West AR]

So finally got round to thinking about fitting an aero filler and have a few things to consider.

I currently have a Rover Metro cap and it has an aluminium piece (spinner) like this https://caterhamparts.co.uk/fittings/4527-spinning-fuel-filler-neck-rover-plastic-cap-type-100.html held on with six rivets.  I am going to drill out the rivets and it appears that the new aero filler will just cover the holes which  are 92mm PCD and the new cap they are 80mm PCD so will need to drill new 6mm holes at this diameter.  I am assume the new neck fits directly to the panel without the need for anything other than the cork gasket?

The old filler neck has three connections and this new one only has two. There is a breather coming from the centre of the tank, see photo below.

It seems that the newer injection tanks do not have this extra mid tank breather, not sure why but as mine has this breather I assume it needs to be connected? I can use a T piece to connect it into the main breather but this got me thinking about the one way valve set up.I have one of these one way valves fitted but I am wondering if it is fit for purpose as I am not sure it allows for tank pressure to be relieved, only air to be drawn in?  https://www.carbuilder.com/uk/aluminium-non-return-valve-8mm

The Caterham Workshop Notice does not seem to say what valve to fit and the only one can see on the Caterham site is this one.   https://caterhamparts.co.uk/hoses/761-one-way-valve-filler-neck-to-charcoal-cannister.html I assume this is a two ball version that allows for air to escape but allows air in to the tank and stops fuel escaping. 

Merlin Motorsport and Demon Tweeks do versions https://www.merlinmotorsport.co.uk/p/roll-over-valve-in-line-with-5-16-8mm-push-on-tails-m-trl88

https://www.demon-tweeks.com/uk/mocal-fuel-tank-pressure-relief-valve-moctpv8/  I am thinking of replacing my Car Builder Solutions valve with one of the two ball variety items.  

Other than that I thought I may as well replace the main fuel filler pipe and the other fuel pipes as they are 20 years old now.  

If anyone has any tips/ experience then would be interested in your opinions.  

Cheers

Nick

 

[Alastair B]

Beware of cheap imitations of fuel hose on ebay etc. with claimed correct specifications, a few posts on here (do a google site search for fuel hoses) showing how they have rapidly degraded. You have to go to the right shop and pay the right price (higher, than ebay), don't ask how I know.

[Wrightpayne]

I ditched the charcoal cannister which solves the 3 to 2 issue. Fitted a sytec non return valve. I sourced new hoses from a specialist hydraulics company in Nuneaton. They remade the tunnel fuel pipe to plenum fuel rail hose for about 15 quid using the old connections with new crimps and correct spec fuel hose. There will be one local to you.

Ian

[SM25T]

Don't allow the tank breather to flow outwards, or you will drop fuel. Wouldn't buy the CC one way valve at mega bucks, just an 8mm job from local car shop. Fitted an aero filler for a friend on a French alpine camp site ... no great difficulty encountered, except the big diameter filler hose was too long to allow neck to fit flat inside skin. Had to notch it. Didn't cause any issues. Having practised on his car, did mine after I returned home !

[7 wonders of the world]

Dangerous Fuel hose here:

https://www.lotus7.club/forum/techtalk/fuel-hose-time-check-yours

[Hampshire West AR]

Had a look at the hoses on my car and although 20years old they look in good condition. I think I will replace but really want to get some genuine good quality replacements.

[7 wonders of the world]

Theres a link in the thread to a source for Gates barricade hose

[Hampshire West AR]

Will order some, thanks for the link.