R34 walbro 255 fuel pump

[drifter17a]

All,

 

i am installing my walbro fuel pump this weekend. I understand the r34 gtt standard wiring uses a two stage fuel relay so on idle it cuts fuel or supply much less voltage (11v ) than 13.5 v.

 

my question is, i normally use a joint coupler with heat shrink covers. Is that ok inside a fuel pump? Obviously i will do the connection outsite of the fuel pump and then put it back in to the fuel pump.

 

i don’t think you can use electrical tape, can you ?

[SandyBill]

Most automotive heat shrink will either expand or dissolve over time in the tank so you would need some kind of fuel resistant heat shrink. Don't know if a marine spares might carry something

[drifter17a]

Many thabks, do you have an example or link?

[SandyBill]

I'm maybe thinking more along the lines of a small I.D silicone fuel resistant hose (small motor fuel hose) line the exposed wiring/solder joint with something like https://www.supercheapauto.com.au/p/permatex-permatex-fuel-resistant-gasket-sealant-85420/356517.html and slip the silicone fuel resistant hose over it. the gasket sealant is non hardening so should keep even a slightly loose hose in place permanently as the sealant wont harden. Best I can come up with man hope it helps!

[iruvyouskyrine]

 E200 Viton Heatshrink

[drifter17a]

Thanks, will check it out

 

i am pretty worried on what happengs if positive and negative touch inside the fuel tank.

 

i think answer is spark and then boom. Have fine japaniese engeenering not thought of this?

 

even if fused, a small spark is enough to blow up the car with 60 liters of gas

 

re wire, i am thinking of soldering, what do you recon?

[iruvyouskyrine]

then dont touch

no touch = no boom

its all gucci

[drifter17a]

If for whatever reason they do, screw coming loose?

 

lots of diy jumps simply use a wire connector so they could be setting up a death trap 

 

just amazed really on how stupied the design is

 

 

[Ben C34]

There can't be a boom in a sealed file tank even if the wires touch. No oxygen.

 

When I do pumps I offet the joints, so they can't touch and the use a piece of submersible fuel line over the positive joint. Like heat shrink but not shrunk.  None have exploded, so that's a pretty good result.

[Dose Pipe Sutututu]

4 hours ago, drifter17a said:

If for whatever reason they do, screw coming loose?

 

lots of diy jumps simply use a wire connector so they could be setting up a death trap 

 

just amazed really on how stupied the design is

 

 

Too rich to ignite, even if you arched something inside the tank it won't ignite, even if created a physical spark it still won't ignite.

Engineers aren't stupid

 

[Ben C34]

If you don't believe us take off your petrol lid and drop a match in

[drifter17a]

8 hours ago, Dose Pipe Sutututu said:

Too rich to ignite, even if you arched something inside the tank it won't ignite, even if created a physical spark it still won't ignite.

Engineers aren't stupid

 

that is what I didn't know :)

 

well I was going mad getting all sort of sleeve to ensure they won't touch ...

[drifter17a]

5 hours ago, Ben C34 said:

If you don't believe us take off your petrol lid and drop a match in

will do later this evening, use my blow tourch .

 

i wonder why in the UK there is an old trick of calling the police and asking for a car to be removed which seems to have been abandoned by removing fuel cap and saying it is a fire hazard.

 

normally when the car is taxed( road tax) and MOT( mechanical check once a year) then they won't remove it but it if it annoying you people do above

 

[Dose Pipe Sutututu]

14 hours ago, Ben C34 said:

If you don't believe us take off your petrol lid and drop a match in

Do not do this on a warm day, there will just enough fuel vapours and just enough air to ignite, just as the match goes down into the fuel neck lol

[Ben C34]

2 hours ago, Dose Pipe Sutututu said:

Do not do this on a warm day, there will just enough fuel vapours and just enough air to ignite, just as the match goes down into the fuel neck lol

Won’t go boom though.  Do it.