The FSE/Sytec fuel pump a lot of us have in our cars... is it made by Walbro and can anyone point me to a detailed spec sheet about what flow @ pressure it can handle? What is the one that Prodrive use for the PPP?

Same for the 1:1 FSE regulator - what pressure is it rated for as I am getting conflicting information. Is it only capable of 5 bar? In other words, running 1.5 bar boost you can only run 0.5 bar over standard and hope for about 8% extra fuel flow? Obviously it would be rather more useful if you could run it at 1.0 bar over standard and then run 15% extra fuel flow.

What is the SX regulator rated to?

 

John,

YHM! (in a few minutes)

I liked the Sard FPR I saw it in a customer car! Very nice adjusting with the pressure gauge mounted to it.

P.S. Also look here: http://www.autoperformanceengineering.com/

Mark.

[Edited by EMS - 11/17/2003 9:33:59 PM]

 

sx reg is rated quite high..

I had a copy of the graph plotting flow vs pressure & current from mark..


Ill get the specs of the sx from the garage.

David

 

oops.. got another stella on the way past the fridge..

Model 15401
fuel rail pressure at 0in Hg Vacuum 43.5psi +- 2psi
fuel rail pressure at 15in Hg Vacuum (by testing)

Model 15402
fuel rail pressure at 0in Hg Vacuum 35 -90psi +- 5%
fuel rail pressure at 15in Hg Vacuum (by testing)

conversions

1 gal. gasoline weights 5.75lbs
avg. at 70 deg F
1 bar = 14.5psi

one with -6 fittings is the 15401.

my reg..















David

 

John,

FSE say that the reg's will only remain consistant to 5bar. Over that, they could become unreliable.

The SX reg' is reliable to 6bar.

The Walbro 341/342 fuel pumps are good for 6bar, but not recommended above that. According to the flow map, at 6bar, they can flow 2.5lpm (150lph) allowing 5.5cc's per 1bhp, this gives the circa 450bhp they are rated too.

On the bigger power cars we're playing with, we're running a minimum of two pumps, one for each bank, and then T'd into an SX reg'.

If we're running close to 6bar, generally, we're using the Bosch '044 pump, which flows marginally more at 6bar, but will happily run 8bar.

Out of interest, on the bench dyno, we HAVE to run two '044 pumps, because when just one was used, there is a dramatic drop in fuel pressure, at high boost, from a relatively low rpm.

Mark.

 

david,

do you have specs for SX model 15404 , as that is what is marked on mine.

 

Thanks Mark, so running 3.5 bar atmo with a Walbro pump and FSE reg, and using less than 1.5 bar boost I should stay within the capabilities of both devices using 740s and 450 BHP from the looks of it?

 

John,

I would recommend having a FPG in the car, at least whilst mapping.

The pump is fine at 5bar, and according to the flow map, will give 2.8Lpm. Trout is using 740cc injectors @ 3.5bar, and getting over 500bhp, so you should be ok.

Mark.

 

john, I dont, the info is on a piece of A4 that came with my reg..

if you look at the Aeromotive specs and add about 1bar on their ratings then its about righr

John.. People have been know to run a short length of hose to the gauge and shove it under the windscreen wiper whilst testing

David

 

Thanks gents. I can always rig up an SPA pressure gauge whilst mapping. Wideband should keep me right after that.

 

I would recommend having a FPG in the car, at least whilst mapping.

just in case you missed that bit john

finally we agree on something mark

 

The more gauges the better (possibly) whilst setting up.. helps to have passengers to watch gauges, whilst someone maps and someone drives though..

Well it did in mine.. mapping on the road wasnt recommended.. keep your foot down.. hmmm sideways changing lanes..

David

 

thanks david

just found this:

EFI Adjustable Fuel Pressure Regulators Models 15402 and 15404

Provides pressure adjustability from 35 to 90 PSI. The model 15402 has -10 inlets and a 1/8” NPT gage port. The 15404 has -6 inlets but with a shorter body height for easier installation. Both provide the same flow performance with approximately a 1 to 1 boost ratio.

Maintains stable fuel system pressure between 35-90 psi for tuned flow rate flexibility up to 180 GPH (1,100 PPH)

Features a vacuum/boost compensating port for a supercharger, turbo or intake manifold vacuum connection.

Innovative design eliminates engine heat soak conditions: holds a minimum fuel system pressure of 25 psi for at least 20 minutes after pump shut down.

Available in models 15402 (-10 AN inlets with gauge port) and 15404 (-6 AN inlets without gauge port).

Adjustable Range: 35-90 PSI (relative to vacuum port reference)

Pressure Regulation Slope: 3 psi/gal of flow rate change

Either model of regulator is capable of supporting two SX Performance™ fuel pumps. This means that each SX Performance™ regulator can handle horsepower into the 1400 HP mark.

 

Aeromotive Homepage

Aeromotive Regulators

 

I've recently fitted my Aeromotive fuel reg (amongst a few other choice products) and it's the dogs bolx.

Not only that, it's shiney, red and silver, and has a little hole for a gauge tapping, how nice.

Paul

 

Where did you get your SX reg's from?

 

I can recommend Summit Racing for aeromotive regs. I actually thing the aeromotive one is better as it has the tapping for the gauge in the body of the reg. The SX ones need to be modded if you want this.

Paul

 

Paul,

Or you can just use an in line gauge adapter. Some SX reg kits come with this.

Mark.

 

also paul.. the sx is better if you want to run more boost as its pressure range is better.

 

Pressure range seems fine on the aeromotive to me, but then I only paid £50 so I can't complain.

Paul

 

Pressure according do Aeromotive is okay up to 70psi *base pressure*.

Which is the highest pressure it can regulate to relative to manifold pressure, which is limited by the spring. Total pressure (fuel + boost) isn't a problem.

Paul