Anyone know what the flow limit or HP rating of a small turbo EsCos FPR is?

I'm thinking of incorporating one into my V8 fuel rail setup as they are small, light and OEM quality.

Running Deatschwerks 350IL pump and best guess 550 bhp ish...

 

So a fuel pressure regulator sits beyond the fuel injectors, so fuel pump > Fuel rail/ injectors > Fuel pressure regulator.

When a fuel pressure regulator is operating as it should, its 'leaking off' excess pressure.

For example, if a fuel pump is supplying a fuel rail at 4 bar of pressure, yet at idle the injectors only require 3 bar of pressure, the fuel pressure regulators job will be to reduce this rail pressure to the desired 3 bar, it'll do this by releasing this 1-bar/ opening enough to reduce the back-pressure on the system to 3 bar.

But when the engine is running, the fuel pressure is going to drop as the fuel injectors are opening, which means the pump has to flow more to meet the demand, subsequently the FPR will continue to try to achieve its rail pressure by reducing the flow through it (on a boosted setup it'll increase the fuel pressure it due to the additional boost pressure within the manifold 'fighting' the fuel pressure)

To drop fluid pressure requires little volume due to it being pretty much incompressible, so the fuel flow through the regulator should be relatively low as long as your fuel pump is working correctly (not running max amps when not required)

The long-story-short. It should be fine, as when the flow is higher, the engine is consuming the fuel in theory and shouldn't be passing (in large volume) through the pressure regulator. If you want complete security; a fuel pressure transducer wouldn't be a bad idea, and can be plumbed into the ECU as a additional safety margin (if fuel pressure drops cut ignition etc etc)

http://injectordynamics.com/articles...ure-explained/
this might be worth a read

 

I know where you're coming from, I don't want to go to all the trouble of making up a billet housing to find the EsCos one can't bleed off enough of the flow provided by the bigger pump @ 350 litres per hour.

 

Did it work in Escorts with say an 044 ?

As the 350 isnt a huge amount better than an 044. Or just use an 044 ?

 

Don't know mate, from what I've read the 044 would be close to the limit and the 350IL will do the job - plus I've already bought it

 

What's the application ?

044 will do around 600 with boost, 700 n/a

 

N/A on throttle bodies.

Already got the pump so will work with what I have, just wondered if the EsCos FPR will do the job...

 

What format is the Escort FPR ?

Wouldn't it look nicer with a bling aftermarket one ? In black and red to match

 

Probably would to be honest, but I'm getting short on space and the Escort one is very compact, old pic from when I fitted one to a turbo bike and had to make a housing for it.

 

A lot of people just mount theirs directly onto the end of the rails.

Turbosmart do some pretty compact ones. Stick it on the end of the passenger side rail, short link to the drivers side rail, and the return out towards the left side of the car ( assuming that's the side the return goes )

https://www.rstuning.co.uk/product/t...-18-npt-black/

 

Or Aeromotive do their red and black

 

Yeah, what fuel pressure will you be running? Is it 40psi to achieve the 350L/h,

If you really wanted you could run mega safe and have a pair of bosch FPR's most seem to be rated @ 220L/h... but I doubt its necessary, it's difficult to give you a definitive yes answer without knowing power produced/ fuel consumed etc etc

 

Never try and run two regulators on the same system. It's dumb.

 

Whist's i agree completely that dual regulators would be a complete waste of time and money, functionality wise i cant think of a reason it wouldn't work? especially on a N/A system where the fuel pressure would not vary as it would on a turbo'd system.

Shame I cant find any leak-off spec for that aeromotive FPR.

Honestly OP, at 550bhp a standard Bosch FPR will more than likely be fine, if you want complete security a fuel pressure sensor(transducer) will be another tool to your arsenal in making sure the engine is running well. I'm not sure how you can calculate the leak off without physical testing of pretty much every component in the fuel system and have the engine running to know how much fuel its consuming across the whole map.

 

HP is irrelevant.

Fuel flow from the pumps is what the FPR needs to be able to cope with.

And two regulators....ultimately only one will govern, whichever is lowest, and if one failed or went soft so to speak, the entire system still fails. It could create bizarre goings on which is why it is not done.

 

I'll probably go after market and mount it on the inner wing if I can as I've been mocking up air filter and there's not much space!

Some research needed on the various fittings I can use to run the rails in parallel with a single line back to the FPR.

I doubt it will make 550 bhp with the cam I have but want enough safety margin if I get lucky and it makes more!

 

you could run them in series, parallel, or dead end them really. Whatever suits best.

Dead ending them with the reg in front would mean the least amount of fuel lines anywhere