Sucking air into fuel filter

[peterboat]

Re: Sucking air into fuel filter

I am going to move my air filter to in front of the rad as well to sort out my hot running problem. On the swirl pot system, I
thought it was introduced to provide a cool air free fuel supply at the fuel rail. I know that these systems have been problematic on mercs and some other vehicles seems like Marlins arnt imune from these issues

[greyV8pete]

Re: Sucking air into fuel filter

I am going to move my air filter to in front of the rad as well to sort out my hot running problem. On the swirl pot system, I
thought it was introduced to provide a cool air free fuel supply at the fuel rail. I know that these systems have been problematic on mercs and some other vehicles seems like Marlins arnt imune from these issues

Sorry to hijack David’s thread, but it’s important to avoid having fast moving air passing sideways over an air filter as the turbulence it causes in the air flow meter has been related to misfire problems on some efi engined Marlins. Better to duct from the front into a closed system (like Happy Dave, The Moog and myself have used). Link below to the CBS one which is a fraction of the cost of some others on the market! Peter

http://www.carbuildersolutions.com/uk/remote-carbon-fibre-canister-air-filter

[peterboat]

Re: Sucking air into fuel filter

[QUOTE=greyV8pete;39877]Sorry to hijack David’s thread, but it’s important to avoid having fast moving air passing sideways over an air filter as the turbulence it causes in the air flow meter has been related to misfire problems on some efi engined Marlins. Better to duct from the front into a closed system (like Happy Dave, The Moog and myself have used). Link below to the CBS one which is a fraction of the cost of some others on the market! Peter


I will have a look what to do when the rad is off for replacement with an alloy crossflow unit so there will be plenty of room to bodge sorry engineer a solution. At the moment the airfilter is behind a red hot rad hardly the best place for power or good running but thanks for the link it all helps

[philcoyle]

Re: Sucking air into fuel filter

No worries there, my intake is through the side louvres then ducted under the dash to the filter, from there it goes back through the bulkhead to where the air flow meter is fixed and then truncated by 76mm aluminium tube to the engine.
The ECU is fastened to the rear of the aluminium filter casing and helps to keep ECU temperatures down as the cold air from the side of the car does two jobs.

[Mike]

Re: Sucking air into fuel filter

A picture paints a 1000 words:


Inlet manifold and Cold Air Intake

My air intake is through the blanking plate I glassed in above the top of my radiator in my nose cone.
90mm diameter flexible hosing leads into a closed conical K&N air filter, through an adaptor into the MAF (Mass Air Flow) meter.
When I designed it, I worried that the tortuous route/length of the intake tract may adversely affect performance, but that has proven wholly unfounded - the M50B25 engine just takes off at 4000rpm and very quickly his the limiter at 6000rpm!


Nose Cone with Air Dam and Cold Air Inlet

Original GRP dam before being trimmed back significantly to flush with the top of the radiator,.


Nose Cone + Air Deflector

[Tony Stott]

Re: Sucking air into fuel filter

Mike, what did you use inside the glassed baffle, ply, ali mesh etc? - I am about to do a similar panel on my Berly!

[Mike]

Re: Sucking air into fuel filter

Mike, what did you use inside the glassed baffle, ply, ali mesh etc? - I am about to do a similar panel on my Berly!

Hi Tony

It's only an off-cut from a sheet of GRP, about 3mm thick, that I sourced from a GRP specialist 10 miles down the road.
I asked for something thicker, but they told me just a couple of layers of glass sheet in resin is very strong, so 2-3mm will be fine - and of course they were right - it works very well.

As an added bonus it stiffens the nose cone a little too.

You can buy GRP kits in the UK to make your own, so I guess the same will be available in France, and then glass/resin bond it to the nose cone.

Mike

[Tony Stott]

Re: Sucking air into fuel filter

Thanks Mike,
I have both thin(1.5 - 2.0mm)marine ply and ali fine mesh, my idea was to use tissue and resin to encase either or, and then glass it in place(resins not a prob, I have about 4.5litres here from / for renovation of classic '60's UK sailing dinghies.
The prob here a la frog(my area) tradesmen are reluctant to give/sell surplus 'stuff' as, if you ain't got the papers and something goes wrong they are somehow liable!
Even car bits and pieces, its usually cheaper to buy and import from the UK than it is to buy here - where's the logic in that then!!
Its all all part of the anomalous lifestyle here a la Finistere!
Have a good/great weekend all!!