Jay,

iTrader: (4)

Ive noticed when getting under half a tank in the cossie the fuel system starts to feat up and when lower the pump gets noisy and sound like its aerating the fuel !( obviously this is driving it like a complete tool for at least half an hour ) So doing some research and found most modern turbo diesels run a fuel cooler due to pressure and delivery heating the fuel up to help with density .

So although yes you could keep the car brimmed full but then no more fuel station roulette and wheres the fun in that ! And from what I understand cooler the fuel the denser it is = more power and and a better

So just wondered does any one use on or can shed a more of a technical if buts and what for ?

Thrush

iTrader: (1)

I'm not sure the fuel is any denser or better at lower temps, I thought it's just the colder, denser, air that packs more oxygen in the fuel/air mix...

Chip

iTrader: (3)

Colder fuel is more dense, and hence will richen your AFR, but I doubt its by enough for you to notice without some really specialist equipment TBH, I cant see a normal wideband noticing the difference unless the fuel is really really hot.

opposite lock

iTrader: (3)

If you think of the winter climates the fuel must be very cold compared to summer.
Fuel can act as a coolant can it not? so the cooler the better maybe especially with big boost.
Does the pump aeriate under normal conditions under half a tank? Could be a duff pump mate i had 'new' pump that lasted no time aeriated and changed it and solved it.

Is it the original tank?

Jay,

iTrader: (4)

No the pump is spot on mate but have not kicked its teeth in unless there is plenty of fuel in it

Ade500

iTrader: (1)

I've noticed the same problem on mine jay,not sure what temp the tank gets to but I will check one day. Even my transit 05 has a cooler fitted .

stevieturbo

1. measure/log fuel temperature.

2. If you deem it too hot, fit a cooler.

Job done

Ive been recording mine for a few years. Rarely when moving does it exceed 40-45degC. Although I do have a badly placed cooler under the car. Typically those temps would also be on very warm days, so not unreasonable. Generally they'd be around 30degC though.

That's with a couple of pumps, fairly large tank rarely below 30 litres capacity, and a pretty hot engine bay/fuel rails. So a fair amount of heat getting transferred to the fuel from the hot engine.

There are literally hundreds of cooler options, just find one that fits, stick it on the low pressure return, and that's it sorted.

stu21t

Would colder fuel help drop charge temps?
In the inlet surely spraying cold fuel into the air will help drop temps?
Maybe not enough to notice a gain tho...

stevieturbo

I'm sure cooler fuel will always be better than hot fuel.

Alg1k

iTrader: (2)

Have a chat with Karl at NMS ,
They have fitted one to the sunbeam

xr2wishy

iTrader: (2)

Theory is sound, I noticed the same in my xr. May help to drop cylinder temps a tiny bit, but reduce aeration of fuel more than anything. Many diesels have them due to heat from pumps and thermal transfer from fuel rail on return line.