Ferd

Hi All
Right as you can see I have made a custom fuel rail so I can use FRST injectors (Got 701s but using STD to set it up)
I want to set it up as shown in the picture so I do not have to move the air idle but I think the injectors may be a bit close to the valves.
Would like your opinions or suggestions.

Ferd

clarke5700

crazycage

thats just dangerous mate

Ferd

please explain dangerous?

Do you mean having the injectors that close to the valves.

Ferd

robrs2

If the joints are done right it will hold 3 - 4 bar fuel pressure ok.

You could have used a black top fuel rail.

crazycage

so what about the rest of the fuel pressure when the boost comes in lol.
how is it going to be held on the manifold ?
how do you know the injectors fit properly in that pipe ??
and is it really worth risking the whole car and maybe your life if it leaks ???

Ginger Will

Surely the amount of boost wont make any difference to the fuel rail. The connection of the injectors into the mainifold is as factory and 3-4 bar of fuel pressure is loads for a petrol injection system, isn't it?

robrs2

Sorry m8 didn't know you wanted a blow by blow rundown on what needed to be done.

I was guessing Ferd was after info to see if the copper pipe was up to the job and he would have fixed the pipe to the manifold.

My mistake eh

Also forgot about the 100bar boost

Ferd

Hi
Right Sorry I should of put some more info on the fuel rail.

Its 15mm copper pipe as used in plumbing and should take 6 bar easy but I will pressure test it.
The Fiesta fuel rail has a 15mm hole were the injectors go in and my rail has a bit of 15mm copper pipe in the T piece were the injectors fit. They are in fact a bit harder to get in than the Fiesta rail.
I have made sure that the O ring is sitting in 15mm and not the T piece.
The rail will be clamped in position and I have an FSE to set the pressure.

I was talking to a Mechanic mate tonight and he said they should be ok in that position or by adding a spacer (5mm) even better.
As there is a Tufnell spacer with gaskets between the head and 1st part of the inlet I was thinking two and the jobs done.

Ferd

Rob

Pressure will not be a problem with the rail, however I think i'd be concerned a little with heat soak to the fuel. I'd be interested to see the results.

xrt-mart

iTrader: (1)

This is how Ive done mine with a blacktop fuel rail. Just used a remote ISCV from an early CVH.



Mart

Ferd

Looks good that.

What did you use on the bottom of the injectors as a seal and is that the FRST TPS?
Why did you use that TPS?
Ferd

xrt-mart

iTrader: (1)

I had some converters machined up to allow the top feed injectors to fit. The converters are pressed into the sandwich plate.

I had a converter machined so I could use a FRST TPS as I am using FRST management

I have more pics if interested.

Mart

Ferd

Got a bit done last night.
Made seats to go in the rail so the injectors are held down like they are in the original
And put the 10mm section in so the air idle doses not have to move and go the ends on.
Will pressure test it tonight.

I am using FRST management as well. Do I have to use the FRST tps?




Ferd

16vzetec

just wondered if you knew that the zetec tps works the same as the fez one and you just have to fit the zetec plug to the loom! far less work!

clarke5700

lol turbo cars are fitted with rising rate fpr as every 1 psi of positve boost will act on the open injector.

for example if you have 45psi fuel presure and then run 20 psi boost when that injector opens it will only be like 25 psi fuel presure as the 20 psi boost will over come the presure of the fuel.

so turbo cars are fitted with riseing rate fuel pressure regs. so for every 1 psi of positive boost the fuel presure is rasied buy 1 psi. (hence the little vac pipe on the reg)

hope this helps

Ferd

Cheers for that 16vzetec I did ask that some time ago and now I have the answer.
And Cheers also clarke5700 intresting. So Is it just the turbos that have rising rate fpr or is it all of them?

Ferd

zetaboostboy522bhp

not being funny mate but thats shocking and i can see this only ending in one way DISASTER!! . why not just buy a blank billet fuel rail and get it machined as iam sure the amount of money youve spent on plumbing fittings would not be far off buying a billet rail . also the lads are right about fuel pressure on a turbo car , mine fuel pressure was set at 45psi @30 psi of boost

cheers paul

Ferd

Just to put some minds at rest.
When I was looking into a custom fuel rail I wanted it to fit the car with out moving the air idle and hold the 701s in place.
Ok so the copper pipe and fittings may not be the best material to use but I made it and it works fine with no leaks and I was not the first. Take a look at
www.zetec-turbo.co.uk
They made theirs from copper as well.
I made copper seats that the injectors sit in just like the originals and there’s O rings around the injectors were they go into the manifold plate. It’s also clamped down as shown in the picture above. I pressure tested it at 6 bar all night at work.
And heat soak that will never be a problem and my fuel pressure is set Via a FSE valve.
The car has now been running with the rail for 6 months with no faults and works very well.
I mite just add I put a knock switch on the fuel pump just in case.

Garage19

Do you know this for fact? Or ar you just randomly speaking out of your arse because someone has used their brain and saved a few quid rather than spend a fortune on overpriced parts?

The 15mm copper will piss the pressure. What do you think is used on the pressure side of big transport fridges?? Copper and alll soldered together.

If it is the soldering you are worried about have a look at your OE rail. How do you think they are held together?

fiestamk2

get a proper rail,job done.no need to worry about anything breaking,i paid a fiver from a scrapper

crazycage

im surprised your engine didn't melt on the dyno !!!!! i run that on tick over.

Ferd

I have a Black top fuel rail but I like mine more and I did not have to move the Air idle.

bad boy rs

iTrader: (7)

did you used to work at engine advantages ?

Brian

iTrader: (2)

Brian

clarke5700

clarke5700

no just forced induction mate

Garage19

Most turbo engines don't have rising rate FPRs.

RickyLee53

Agree'd, although I personally wouldn't do it. I make billet fuel rails for probably not a lot more money.

But loads of new cars come with plastic rails. 60-70psi isn't exactly massive pressure on some copper pipe like that.