inline fuel filter

[wooly350i]

Hi everyone,i have put new engine back where it belongs and now connecting stuff back up. I want to fit an inline pre-filter and valve before fuel-pump and thought i saw a similar thread on here a while ago but cant find it.I want to know which type and make/model to buy and fit,any suggestions appreciated.

[SEvans]

Fitted one of these to mine.
http://www.demon-tweeks.co.uk/products/ProductDeta...
Fitted before the fuel pump. I also have the standard filter after the fuel pump. Cheers Steve

[matt-man]

I have one of those filters and sorted out the common fuel pump breaking!

[Number 7]

http://www.pistonheads.com/xforums/topic.asp?h=0&a...

This is the inline filter I used in my 400.

7.

[wooly350i]

Thanks for you're replys lads,that has helped so i know what im asking for,i am undecided if i should also incorporate a non return valve to maintain pressure when switched off to aid ignition when firing up again

[TVRleigh_BBWR]

Ideally you don't want the engine to fire too quickly, esp if it's been sitting, as you would to build some oil pressure 1st.

[wooly350i]

Right i've got the bullet filter on order (the BULA9 version with 15mm in and 15mm out)just need to use a reducer and valve between the swirl pot exit and inlet to filter,the new fuel pump is 15mm inlet. I decided in my wisdom to take a look at the 5 year old fuel lines that ran through the transmission tunnel and was surprised how hard the rubber had become(Heat i suppose) so i have decided to run new lines down through body at back of front offside wheel arch and along chassis outrigger feeding behind body mounting plates then up infront of tie rod bush point to pump etc and to nearside tank return.The big question is fuel grade standard 8mm i/d rubber or braided 8mm rubber,at least if its standard i can see any degrading of the rubber but braided,who knows whats going on under the brades,looks good though!and and

[TVRleigh_BBWR]

Just make sure it's injection hose.

[GreenV8S]

Braided hose is great if you have stuff hitting the hose and want to protect it from damage. Apart from that it serves no purpose that I can see and makes it impossible to see what state the hose is actually in. And it bumps the cost up a hell of a lot too of course - not just the hose itself, but all the end fittings that you'll need to buy to fit it properly. (And for God's sake don't just put the braid under a jubilee clip on a hose tail.)

[MJG280]

I've seen the suggestion somewhere on this site in the past to use lorry brake pipe. Cheaper stronger but don't quite understand how the econnections will be held.

Gates multi-carburant hose was also suggested apparently good for 148psi 8mm ID hose from a Motor Factor.

I will be doing the renewal next year when the body is off so if someone has any good ideas much appreciated

[GreenV8S]

MJG280 said:

I've seen the suggestion somewhere on this site in the past to use lorry brake pipe. Cheaper stronger but don't quite understand how the econnections will be held.

Interesting idea, but I'd want to be sure it was unleaded petrol friendly before fitting it. (It may well be, I don't know.)

[SEvans]

I know some of the race cars used kunifer pipe as part of the fuel line. I did look at using the same when I replaced all the fuel lines, but factoring in the extra fittings and joints to convert to flexible steel braded at each end it was cheaper and easier with less joints to just run steel braded all the way. Didn't really like the idea of running ordinary rubber behind the sills. Cheers Steve

[wooly350i]

How do the fuel pipes run in the later 390 and 400 wedges? Do they run along the sill or down the transmission tunnel and what pipe is used,high pressure rubber or braided rubber? I dont suppose they were solid ones were they?

[Hamish400]

My fuel pipes run down the top of the outrigger behind the sill (1989 built 400SE). If I remember correctly the return line is flexible but the delivery line is a metal pipe with hoses at each end. They pass up the rear of the offside wheel arch, then through the lower and upper body fibreglass panels at the wheel arch top, to reach the engine bay.

I fitted a bullet filter and isolating valve (ball type) some time ago.
I found the standard paper element in the bullet filter starved the fuel pump at high power (engine misfiring a little) when there was a low level in the fuel tank. Solution was to fit the alternative mesh type strainer element for the bullet filter (from Demon Tweeks).
A standard fuel pump discharge filter is used.

Rgds
Hamish

[wooly350i]

Good Stuff!!
Got to go and pick up my bullet and valve tomorrow morning, will order a mesh gauze element asap.

cheers, wooly

[adam quantrill]

That was me with the lorry brake pipe, cunifer from front to back, worked a treat. The ends are joined on incredibly simply, you just have about 6" of rubber unleaded-rated line jubilee-clipped on between the cunifer and the metal fitting. Cunifer, being metal, is of course good for unleaded (and brake fluid too ;^)

It turned out much cheaper than 10 feet of unleaded hose and lasts indefinitely.

[TVRleigh_BBWR]

I've got metal lines on the racer also.