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Nah, return every time.  Feed is under pressure.  No point in risking more spots where you can have a sudden escape of fuel.  And it's not that the pump heats it all the way up on the first pass through.  It's the repeated pass throughs that are the problem.  Hence taking the heat off on the way back to the tank is good enough.

Haven't hooked it up yet until I'm sure where I'm going to mount it, but yes it'll be the return line as suggested

 

The vw cooler is tube and fin and definitely more suited to the mounting location from cooling perspective. it's just that I've had this cooler sitting there as a spare so I might as well use it. I only used the VW cooler as an example from safety perspective. if it's not ideal I will give it another thought to see if I can find somewhere else safer

 

 

Yup, so will a front collision that is big enough to impact the integrity of fuel system in a standard engine bay
Or a golf GTD spinning out on the track with bottom of chassis hitting the ripple strip
All huge fireball events, totally badass

If you have better suggestion as to where to mount it I'm all ears, I still havent found a satisfactory place to mount it and considering just hooking up a walbro 460 instead which is a newer in design and doesn't produce as much heat as the Bosch

Yup, so will a front collision that is big enough to impact the integrity of fuel system in a standard engine bay
Or a golf GTD spinning out on the track with bottom of chassis hitting the ripple strip
All huge fireball events, totally badass

If you have better suggestion as to where to mount it I'm all ears, I still havent found a satisfactory place to mount it and considering just hooking up a walbro 460 instead which is a newer in design and doesn't produce as much heat as the Bosch

diesel won't ignite like petrol as the flash point is near 90 degrees and also the flame speed is pretty slow so usually in accidents it won't ignite and/or go bang like petrol once it vapourises

It's been mentioned earlier:

The rate at which the fuel is being circulated directly impacts fuel temp. A bigger capacity pump will circulate the fuel even more quickly and you may actually gain temps. 

Are fuel temps critical to your tuning strategy/methods - eg is it using a VE mapping setup?  Do you actually need to control fuel temps?  Is the fuel boiling in the tank?

They're the things I'd consider before actually doing anything.  Sometimes we can pursue a line of thought that seems logical but actually is flawed.

Especially if this is 99% road car, I'd investigate Sneakey Pete's suggestion and PWM control the fuel pump speed.  Far less effort/complexity and you may yield a good result.

Good luck either way, and please update the thread with pics and results.

9 hours ago, chiksluvit said:

Yup, so will a front collision that is big enough to impact the integrity of fuel system in a standard engine bay
Or a golf GTD spinning out on the track with bottom of chassis hitting the ripple strip
All huge fireball events, totally badass

If you have better suggestion as to where to mount it I'm all ears, I still havent found a satisfactory place to mount it and considering just hooking up a walbro 460 instead which is a newer in design and doesn't produce as much heat as the Bosch

GTS boy posted that ont he last page. behind the subframe under the wheel well.

Thanks Dale, you've made a good point. Was judging hot fuel by whining pump when the fuel heats up. Hasn't affected performance at this stage- well it doesn't go so well on hot days anyway esp when its untuned

And yeah Johnny one day when the cars ready lol tracked my old car and the maintenance cost is expensive

1 hour ago, chiksluvit said:

 


Yeah thought about that, good location, just don't really want to drill holes on the floor pan...

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