fuel lines
Turbo Mini Forums

Ive used the search engine to work out i need 8mm fuel lines... but is this 8mm external measurment, or internal measurment??

cheers

Bruce

its ID my friend.

'always keep a spare shot for a stray bird'

id??

8mm OD is more like it....

ID - Inside Diameter OD - Outside Diameter

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The inlet to the turbo fuel regulator is 6.7mm ID if i remember correctly so 8mm ID fuel pipe is pointless

sorry, im sure i read somewhere that it was ID. listen to these guys they know a hell of alot more than me.
good job was going to by my fuel lines this week.

'always keep a spare shot for a stray bird'

ive found this.
http://www.turbominis.co.uk/forums/index.php?p=vt&tid=10564

'always keep a spare shot for a stray bird'

I don't think it's that critical as long as it's greater than 6mm as all the fuel the engine needs has to pass through a hole less than 3mm diameter at the needle valve.
As long as the pump has adequate capacity that is
Regards
Dave

Edited by danboy on 21st Jan, 2007.

at the minute i use some 8mm ID rubber hose as its cheap until i can "borrow" some lengths of stainless from work and fit them properly to the car!

Basically as long as the return fuel line is greater ID than the supply line to make sure there is no restriction it will be ok.

The return from the fuel regulator outlet is 6.7mm ID so a restrictor of 6.5mm or so should be placed in the supply line just before the inlet to the regulator.

You can use 8mm ID or 8mm OD fuel pipe it wont make any difference as the restriction is at the fuel regulator

If im wrong then please someone correct me

On 21st of Jan, 2007 at 05:00pm Minimad69 said:
Basically as long as the return fuel line is greater ID than the supply line to make sure there is no restriction it will be ok.

The return from the fuel regulator outlet is 6.7mm ID so a restrictor of 6.5mm or so should be placed in the supply line just before the inlet to the regulator.

You can use 8mm ID or 8mm OD fuel pipe it wont make any difference as the restriction is at the fuel regulator

If im wrong then please someone correct me

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Hi,
Some people have had problems with the return being too restrictive causing as back pressure in the return.
This upsets the regulator which causes over fuelling if IIRC.....
I think this is the reason most go for 8mm feed and return.
Cheers,
Gavin :)

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Basically as long as you can get the pressure to the carb low enough then it shows that the return is free flowing enough.

I spose as long as the feed and return are the same size and theres no restriction there shouldnt be a problem as the amount of fuel being returned from the regulator will always be less than the supply

Can't see what the problem is.
Keep inlet and return the same diameter as there is always less flowing in the return (inlet flow minus carb requirement)
Regards
Dave
Looks like you just beat me to it MM69
Dave

Edited by danboy on 21st Jan, 2007.

so i need 8mm OD fuel lines. :)

Cheers people :)