Quick fuel question

[pork]

Which hose is which? Can't see which hose goes where :s

Left is towards the rear seats

 

[MicrAde]

right flow, left return.......I think

 

[pork]

Haha, that's about as far as I got......I think

 

[MicrAde]

Difficult to tell zooming in on pdf haynes manual but I'm pretty sure thats right Whats the worst that could happen?? lol

 

[pork]

Also, Im gunna be running a 3 bar inline fuel pump. Will the existing lines be ok?

 

[frank]

Also, Im gunna be running a 3 bar inline fuel pump. Will the existing lines be ok?

that will depend on what the regulator is set to pork

 

[pork]

that will depend on what the regulator is set to pork

With the regulator I have to use, the fuel pressure will rise and fall, staying 2-3 psi above the boost pressure, so lets say 15 psi at maximum
Would that be ok do you think

 

[pork]

Been doing some more reading.

Apparently if there's and kind of restriction in the return line, such as tight corners, joining different pipe sizes (which I have ) and other stuff, the fuel pump can overpower the Boost FPR

What can I do?
Replace with larger diameter pipe? If so where from?
Could I just use rubber all the way thru?

Also read that might be better placing the boost FPR by the tank to rule out any of these problems

Heres the FPR

But then I'd have to run air line to the fuel tank

Any suggestions?

 

[frank]

just check the pressure while the engine is,nt running neil, that will be the highest rate of return eh

 

[pork]

just check the pressure while the engine is,nt running neil, that will be the highest rate of return eh

Like, run the pump while engine is off ?

 

[frank]

Like, run the pump while engine is off ?

aye, and if it flows ok, then it,ll still flow ok when you are burning fuel eh

 

[pork]

.

 

[pork]

Cool, if I were to replace lines in the future, what could I use?

It all looks a bit....well **** really, loops off hose, fuel pump jus sited anywhere, j-clips and hose tail reducers. Could do with neatening up

 

[pork]

Right, the return line is to restrictive, and that's what's causing the FPR to be overpowered by the fuel pump
I've been testing it in workshop with different size return lines, so need to go bigger.

Hose is easy enough to get, but what shall I do to the fuel tank? In gunna have to have a lager fitting attached to it for the larger bore hose. Is it a simple case off drilling and tapping into it?
What's best way to do this?

 

[pork]

What if I made a swirl pot? That should work shouldn't it?

 

[SirChris]

I rekon you could use a fitting like the ones you use in emmersion heaters http://www.tradingdepot.co.uk/DEF/product/!!SPDTANKCON15!!/?gclid=CIOsmvK0_rMCFQVgMgod7G0Arg like that but a copper one eh?

 

[SirChris]

I suppose you cannot get to the other size though... the tanks are plastic eh? Wit no k10 might be metal?

 

[pork]

I'm gonna giv making a swirl pot a go.

Nothing happening at work today so why not

Jus wondering if I can use the mechanical fuel pump that's on the k10 engine to supply it?

 

[pork]

So. Cut off old hose tail connectors, reduced the incoming and out going to carb bores, increased the return port bore.

Also made this quickly, gunna do couple of tests off the car with it. Hopefully it'll work. If not, gotta spend £100 on better regulator, which I don't want to do

 

[pork]

Can I run water thru the electric fuel pump to test with?

 

[pork]

Had a quick test using shops air compressor. Had 50 psi going through it, whilst the regulated pressure stayed at 3psi
Seemed to handle it quite well. But have to wait till I try with pump

 

[pork]

It works!! Barely registered 1psi on its lowest setting

Now jus gotta neaten it up and put it on the car

Still need to know if old mechanical pump will be ok to fill swirl pot?

 

[MicrAde]

Loving your work as usual Pork, can't wait to see this up and running

 

[pork]

Loving your work as usual Pork, can't wait to see this up and running

Thanks mate,

 

[MicrAde]

'Now jus gotta neaten it up and put it on the car'
Dont tidy it up too much eh Ghetto Engineering ftw! Loving the co2 bottle

 

[pork]

Haha, I'm not gonna paint it, kinda like it like that too. Jus make all fittings straight and proper.

Do do you reckon the old mechanical fuel pump will be ok to supply the pot?
Or another low pressure electric?

 

[MicrAde]

Haha, I'm not gonna paint it, kinda like it like that too. Jus make all fittings straight and proper.

Do do you reckon the old mechanical fuel pump will be ok to supply the pot?
Or another low pressure electric?

Excellent . Hopefully Frank will be along in a mo to answer your question cos I cant

 

[karlj]

Think you'd be best hooking up an electric inline pump

 

[MicrAde]

Or just try it....whats the worst that could happen??? lol

 

[jk9194]

Which hose is which? Can't see which hose goes where :s
View attachment 20941

Left is towards the rear seats

is that fuel pump?

 

[pork]

I hope I can get away with mech pump, don't wanna buy/plumb in and wire another pump.
Plus if u can use mech pump, I can keep back seats

 

[karlj]

iirc the metro turbo (which is a carb'd turbo) runs an out of tank inline 12v pump

 

[karlj]

You'd be able to keep rear seats I'm sure I've seen a "slim" pump somewhere

 

[pork]

is that fuel pump?

That's the fuel tank and fuel lever sender

 

[pork]

iirc the metro turbo (which is a carb'd turbo) runs an out of tank inline 12v pump

That's what I've bought

 

[karlj]

That should be enough then

 

[pork]

You'd be able to keep rear seats I'm sure I've seen a "slim" pump somewhere

Only other place I could put pump in the back by the tank would be the boot, possibly the spare wheel well, but think that would be kinda dangerous I've it leaked

 

[pork]

That should be enough then

Using that pump on the swirl pot, but need a supply pump to the pot

 

[karlj]

Should be fine as long as you don't smoke lol, couldn't you put it under the car (yes I know that sounds worse)

 

[karlj]

Using that pump on the swirl pot, but need a supply pump to the pot

Ahh I get you now, only real way of knowing is testing

 

[pork]

Should be fine as long as you don't smoke lol, couldn't you put it under the car (yes I know that sounds worse)

Haha, yes it's a very good reason not to smoke in the car!

Way it's stands atm, gunna either buy an electric pump, or another mech pump As I lost the old one
Mech pump would be easier, but if its not gunma be up to the job, then it's the electric. But do t wanna have to buy both, coz I've blown my money on Xmas presents!

 

[SirChris]

I smoked in the car...my racing pump was pushing the good ol petrol into the cabin...was lucky I didnt kill be self... driving the car gave you a head ache ;p

 

[pork]

Ok, so getting to much pressure to the carbs, so had a thought.
What if I had two fuel lines going to the carbs
1st- has regulator that can go as low as 0.5 psi

2nd- is the high pressure line that has the boost fpr on it....but there's a solenoid between that and the carbs

My idea is, normal driving and engine idling speeds, the carbs are supplied by the 1st line and reg.

Then when the boost starts to come on, activates the solenoid, opening up the 2nd line, supplying the higher pressure.

That shouod with, right?

 

[frank]

thats a bit of an on/off transition neil ? what about backflow ? proper rising rate reg ftw

 

[pork]

Well the pressure switch I can get operates as low as 1 psi up to 4psi

So transition would be quite quick

Plus I have all these bits in the workshop for free

Or, is there a way off making the floats in the carbs open up at a higher pressure?

 

[frank]

what i,m saying is your boost pressure will vary while daily driving mate, it might be ok on a track where you tend to be either wot or lift

 

[pork]

what i,m saying is your boost pressure will vary while daily driving mate, it might be ok on a track where you tend to be either wot or lift

I spose so,

You got any ideas for beefing up floats?