That is the question my friends. Is there much point in fitting a FPR kit. I.e is it worth the money and time doing it.

Currently ive got a 93 wrx import running around 300bhp with the following mods. Decat system, apexi power fc & commander plus andy f remap, apexi induction kit, 440cc injectors, walbro fuel pump, fmic and all important 4 pots. And in the next couple of weeks im gettin new exedy organic clutch and a stronger gearbox from 99/00 wrx fitted as advised by david at API.

So what do yous guys think so i get one fitted as after the clutch and gearbox its back to gettin more power again.

 

I fitted one when I fitted my pump as the standard regulator can be overwhelmed by the Walbro.

 

Get one fitted. I was running circa 320 bhp when my walbro pump over powered my standard reg and led to a melted piston on cylinder Number 3.

New engine time!!!

Don't bother with an FSE regulator

Spend the money and get an SX one you'll never look back.

Here's a pic of mine in situ.

 

The only way a FPR can be "overwhelmed" by a aftermarket pump is through exceess flow. IMO
Which would lead to overfueling not lean running and wouldn't cause melted pistons...

If the FPR died (diaphram failure) then yes that could certainly cause you to run lean under boost but how is that related to an uprated fuel pump ??????

Personally I'd be leaving the standard FPR on there...
Ok I have the FSE one on mine but would have been perfectly fine without it and I have a UK car over 400bhp.
I didn't know any better back when I fitted that.
If you "need" to adjust the fuel pressure for some reason then obviously you are going to need an aftermarket adjustable regulator.

Andy

 

It would probably be better without it. The FSE's I have come across don't seem to be able to hold a stable pressure.

Fuelabs are a good regulator as well as the SX. Give Mark a shout at Lateral Performance.

 

What's wrong with the FSE 1:1 regs?

They were the thing to have a couple of years ago when you fitted a Walbro 255l/hr fuel pump, but since then it's been all SX's and similar?

Thanks

 

A few failures on Scoobnet and they become the devils pressure regulator..
As I say, mines been "alive" for about three years/ 20k miles.


Andy

 

Think about it!

Fuel pressure regulator sits after the fuel rails. FPR fails, lets too much flow back to the tank and not enough to the injectors hence running lean and causing a melted piston.

SX or fuel labs are the way to go IMO

For peace of mind fit one. The top tuners on here will tell you not to bother with an FSE reg but don't take my word for it ask the likes of Andy F, Bob Rawle, David Wallis and Steven Darley

Here are a few pics of the damaged piston itself.

 

Yes I know that, I said if the pressure reg fails then of course it's certain death for the engine under boost conditions.
However the way you worded it is that the Walbro somehow makes the standard FPR fail.
I cant see the relationship there, it works in the same way as any aftermarket FPR.
Pressure rises to the point that the diaphram opens, end of..

Anyway I'm off to bed.
Nice paperweight by the way.


Andy

 

It's not unique to Scoobynet mate people have reported faults on many different forums. Brother in law fitted one to a Punto GT he had and binned it in favour of a Sard one as the FSE would stay stable.

You get what you pay for

 

This is a paperweight!!




Daz

 

We used to use FSE as it was OK and a good price, but after we experienced a few variable pressure settings about 9 months after fitting that were traced to the FSE playing up, we stopped.

They are like 99 / 00 MAF's if you get a good one, it'll last and last otherwise good luck......

We used SX and now we use Fuel lab from Lateral. Both are a good bit of kit - the Fuel lab has a sexy colour coded body, Can't ask for more. Good price too which counts.

Use FSE at your peril is my opinion.

David APi

 

No It's not !! It doesn't weigh enough

Even I know it shouldn't have that nice knurled finish and the big end bearing inspection hole.

David APi