What ID fuel hoses?

[streaky]

I haven't found a post that indicates the ID of the hoses from (Bible p49):

1) Swirl pot to fuel pump.

2) Fuel pump to fuel accumulator.

3) Fuel accumulator to metal pipe.

BTW & FWIW, RallyNuts list 1300psi burst pressure hoses in 6mm, 8mm, 10mm and 8mm with s/s braid overlay, and 12mm and 15mm pump input hose (IIRC, the 12mm is used from tanks to swirl pot).

Many thx - Streaky

[number 7]

streaky said:

I haven't found a post that indicates the ID of the hoses from (Bible p49): 1) Swirl pot to fuel pump. 2) Fuel pump to fuel accumulator. 3) Fuel accumulator to metal pipe. BTW & FWIW, RallyNuts list 1300psi burst pressure hoses in 6mm, 8mm, 10mm and 8mm with s/s braid overlay, and 12mm and 15mm pump input hose (IIRC, the 12mm is used from tanks to swirl pot). Many thx - Streaky

Just checked mine: Pump to filter (I assume that's what you refer to as accumulator)=8mm. Filter to metal pipe = 8mm. Can't easily check the swirl pot to pump, but it's c. 13mm, although I have modded mine so that may not be standard. BTW, that last item is a braided steel hose on mine, with a flurosilicon(sp?) liner, and was a real b to fit because it has very little give, unlike non-braided lines. HTH.

7.

[rev-erend]

Streaky

The only way to be sure what sizes they are is to pull the hoses off and measure they with a vernier.

[BIG DUNC]

When I changed my tanks I took all the old hoses and pipes to the local hydraulic specialist. I explained what the application was and they made up some nice ones to suit. This was after my local motor factor tried to give me heater hose instead of high pressure fuel pipe

[streaky]

number 7 said:

Just checked mine: Pump to filter (I assume that's what you refer to as accumulator ...

No, the filter is a separate item. The "accumulator" is as titled in the Bible - Streaky

[number 7]

streaky said:

number 7 said: Just checked mine: Pump to filter (I assume that's what you refer to as accumulator ... No, the filter is a separate item. The "accumulator" is as titled in the Bible - Streaky

My mistake - I assumed you were talking about the V8 system, which doesn't have an accumulator.

7.

[GreenV8S]

BIG DUNC said:

my local motor factor tried to give me heater hose instead of high pressure fuel pipe

Now *that* could have been entertaining!

[jvaughan]

rev-erend said:

Streaky The only way to be sure what sizes they are is to pull the hoses off and measure they with a vernier.

Personally, I would use a ruler

[andy390]

OOhh No. you musn't use a ruler or you'll be susceptiblle to parallax error! verniers it must be

[jchase]

FYI use 8mm ID, and do not overtighten the tie wraps holding the hoses to the chassis. Back pressure in pipes goes up with the fourth power of the diameter of the pipe, and 6mm pipes on a 7 bar 2.8i fuel line raises the pressure to over 9 bar, which gives all sorts of running problems on k-CIS-Jetronic. Make sure you do not turn tight corners with the pipes either or you will introduce turbulent flow, which goes for overtightening of the tie wraps too!

-Jim