1600T fuelling

[Mike]

Ive been reliably informed that SARD 1:1 will create issues muchos bad.

Issue's like these.....

"If you stick it on a rolling road and monitor the AFR you will find that you will overfuel on idle and offboost and underfuel at high boost pressure with a 1:1 regulator."

"if its set to 2.5 bar (standard Nova GSi FPR) then under vacum it will be 2.0 bar ( or near enough) With a 3.bar, it will still drop under vacum by say.5 so therefor its over fueling."

Any ideas anyone?

Mike.

[Adam]

Yes both those comments are right.

You need a reg that increases pressure with boost.

[Mike]

Thats what a SARD does Ad., but apparently it wont work?

[Stuart]

aslong as the 1:1 FPR has a vaccum/boost line to it, it will hold X pressure above the vaccum/boost.

[Mike]

How do i identify it if it has Stuart?

[Adam]

If the Sard your getting increase pressure x boost, then it will work, as thats just the same as Mvaux use to supply...
It will need setting up on a RR with a wideband lambda, keep adjusting it till the off boost and on boost AFR's are correct.

It will have a small hose connection to it...

[meritlover]

if the SARD is referenced to MAP with a ratio of 1:1, how does this differ from the OE regulator?

[DAN-F]

http://cgi.ebay.com/ebaymotors/EIP-t...spagenameZWDVW (http://cgi.ebay.com/ebaymotors/EIP-tuning-fuel-pressure-regulator-FPR-FMU-cartech-begi_W0QQcmdZViewItemQQcategoryZ133198QQihZ020QQit emZ300234028574QQrdZ1QQsspagenameZWDVW)

[DAN-F]

http://www.tdamotorsports.com/pictures/JDMSFMU-BLUE_06.jpg

[Mike]

if the SARD is referenced to MAP with a ratio of 1:1, how does this differ from the OE regulator?

As it will flow to a higher rate then a standard FPR. Which is what ill be needing, a muchos higher rate!

[meritlover]

but flow through the regulator is not the problem. its pressure,

if the OE regulator wasnt able to flow enough then the fuel rail pressure would increase as its controlling the back pressure in the fuel rail. fitting a 'high-flow' regulator will drop the pressure.
you have to increase the pressure to match the increased density of the inlet charge, which has nothing to do with the physical size or total flow of the regulator.

[craig green]

Run 3bar with the vac pipe removed.

[Mike]

Run 3bar with the vac pipe removed.

As in just a 3.0bar GM FPR, removed vac and nothing else? Or the aforementoined AND a SARD reg?

[Adam]

If you fit a SARD in the return line after the OE regulator, and set it to say 4.5bar, it wont matter about the OE reg, the sard will hold 4.5bar in the rail

[Mike]

Wish I'd gone XE now lol confuzing shizzle this is.......

Fuel pressures, boost pipe locations, intercooler sizes, CR's etc etc

[Stuart]

If you fit a SARD in the return line after the OE regulator, and set it to say 4.5bar, it wont matter about the OE reg, the sard will hold 4.5bar in the rail


ummmm no i wont.... it would need to be pre OEM regulator.

[Adam]

Hmm, i must of meant it the other way round lol

Fit a blank to the oe reg then Mike, and use a sard in the return line

[Mike]

ummmm no i wont.... it would need to be pre OEM regulator.

Before OE reg then :confused:

Ad, OE reg on the rail has been replaced with a 3.0 bar GM item from a XE IIRC

[Adam]

Aye, but thats going need removing as it wont be giving the right AFR under boost conditions(its not adjustable)

[Mike]

^ Removed and blanked then? And fit a SARD into the fuel inlet. That simple?

[Adam]

Into the fuel RETURN pipe yes

[craig green]

I dont know how a SARD may vary from the FSE that was on my setup, however it was mounted after the OE reg in the return line, it was necessary to set the pressure to 3 bar with the vac pipe removed (for setup purposes) then refit pipe & job done.

It doesnt matter where a reg is mounted, infront or behind of the OE reg. The highest pressure reg will determine what pressure the rail sees.

I've seen the Courtenay conversions on the E16 with a blanking plate & with both regs in place. It doesnt matter.

[Adam]

It doesnt matter where a reg is mounted, infront or behind of the OE reg. The highest pressure reg will determine what pressure the rail sees.
Thats what i thought, but Stu disagreed.

[craig green]

The FSE reg on mine was mounted in the return line with the OE rail reg left in place with its vac supply connected.

Whichever reg has highest pressure setting, wherever its fitted, will determine the fuel pressure.

[Mike]

Sorted it now chaps :D a Rotrex Fuel Management Unit is coming my way from stateside. Next up, spacer plate :thumb: and thats it folks :D