regulartor dilemma?????????????????????????????????????????

autofetish · Post by **autofetish** » Mon Oct 13, 14 3:28 pm

Im running 16x injectors

8x Small 300cc injector below supercharger. Directly pointing at inlet valves.

These will be used at tick over and up to a certain rev.

(these are on fuel rails with both sides open )

Then

8x Big 500cc injectors above the blower for large fuel delivery.

(these are connected to a fuel block)

How would you connect a fuel regulator ?

Below is what i have

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steveo · Post by **steveo** » Mon Oct 13, 14 3:55 pm

silly question , I know !! do both sets of injectors , require the same operating pressure ?

autofetish · Post by **autofetish** » Mon Oct 13, 14 4:11 pm

yes 35-50 psi

AN-10 Feed from tank
AN-10 Return to tank

autofetish · Post by **autofetish** » Mon Oct 13, 14 4:26 pm

The above blower i have no choice i have to give it a line of regulated fuel

The below blower in an idea world would be run like this

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autofetish · Post by **autofetish** » Mon Oct 13, 14 4:36 pm

Can i do better than this

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Dave-R · Post by **Dave-R** » Mon Oct 13, 14 4:37 pm

I thought the regulator was one inlet and two outlets?

So you would run one line from tank to regulator and use the regulator to split the feed to the two fuel rails??

autofetish · Post by **autofetish** » Mon Oct 13, 14 4:52 pm

Dave wrote:I thought the regulator was one inlet and two outlets?

So you would run one line from tank to regulator and use the regulator to split the feed to the two fuel rails??

Most Standard efi fuel rails run the regulator after the rail to keep good pressure and stop with the injector pulsation affect of the rail pressure.

This is how it will be on your lovely corvette.

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My issues is im running 2 systems

Regulator specs

(3) x ORB-08 Ports

(1) x ORB-10 inlet port

(1) ORB-10 return port

Its also 1;1 boost reference (increases pressure as boost goes up)
And has gauge ports etc

steveo · Post by **steveo** » Mon Oct 13, 14 5:04 pm

, if there is two out let ports on the regulator , have one out let port dedicated , just for the fuel rails ( ie split into 2 ) , & the other one for above blower injectors , will have to have some sort of return from the fuel rails , I think

Guy · Post by **Guy** » Mon Oct 13, 14 5:29 pm

Why not run a low pressure high volume pump to a swirl pot then two high pressure pumps both regulated, one for each system returning to a common return pipe back to the swirl and then a return line back to the tank from there.

autofetish · Post by **autofetish** » Mon Oct 13, 14 6:18 pm

Guy wrote:Why not run a low pressure high volume pump to a swirl pot then two high pressure pumps both regulated, one for each system returning to a common return pipe back to the swirl and then a return line back to the tank from there.

It's a good idea

I have brought a tank with one big efi pump built into it with efi sump and trap doors.

I would need to buy 2 more pumps 2 more regs and a swirl pot !

This is the tank I have with a aeromotive 1000 submerged to keep it quite

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autofetish · Post by **autofetish** » Mon Oct 13, 14 9:03 pm

Thanks all

So the regulator has 3 out puts

Is there any gains by joining the 2 rails together or just block them off ?

Can't hurt join them ?

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Guy · Post by **Guy** » Mon Oct 13, 14 9:23 pm

All i can see are a couple of centipedes and a big spider

steveo · Post by **steveo** » Tue Oct 14, 14 12:24 am

been thinking about this Will , I admit ive never attempted to desgine a electronic fuel injected set up , know enough to fault find & replace on modern stuff , & know the ins & outs & can take apart & assemble a capri 2.8 injections set up blind folded .

i'm taking a guess here , think your going to need some kind of return from the fuel rail , & fuel block , marked 1 , in the picture , it would have been a barrel valve in the old days of mechanical fuel injection .

something is telling me you might need a metered return .

not sure if you need one from ( the pressure regulator 2)

red line fuel from tank

blue line return ,& black bit , fuel flow restrictor . not sure how , may be t them both together with one way valves back to the tank

i'm just guessing ,

also to stop the injectors being affected with the pump pulses , lots of cars are fitted with a fuel accumulators , they have a spring loaded diaphragm inside to dampen the pulses . a mini external swurl pot would prolly do the same , you should have a swurl pot , built in the tank also to hold the fuel around the pump pick up , at all times .

just floating a few ideas & thoughts Will , may be of some use to you & food for thought !

autofetish · Post by **autofetish** » Tue Oct 14, 14 11:37 pm

Thanks for that Steve :

The above (spider system) is a dead head system with only a input and not return for metering.

Mmmmmmm

Think I will just have to have 3 out puts of metered fuel from a regulator supplying all

mopar_mark · Post by **mopar_mark** » Wed Oct 15, 14 7:47 pm

Most important thing is that the regulator is after the rails, not before.

You want full pressure at the rails.... Do not deadhead

Plumb from the pump direct to the fuel rails, ideally using 'Y' fittings to split to each rail. I don't know what the supply feed is, but may want to consider 2 supplies if only small.