IceY2K1Max

iTrader: (1)

Not sure really, but Vortechs' old FMU(fuel management unit) used to use "discs" to ramp fuel pressure in 3:1, 4:1, 5:1, etc. ratios. However, here I've only read about the "washer" that Vortechs new inline pumps use to modify the ramp rate.

tig488

iTrader: (18)

hmm,i did use any, unless thats the fmu unit, i think its 8:1 or 12:1

IceY2K1Max

iTrader: (1)

Yes, the FMU unit "washer". It looks like an 8:1 ratio(6Z050-191).

booger

iTrader: (6)

There is a guy that posted he had to use a diff washer that Vortech sent him because he lived at elevation....Cant remember the thread though

IceY2K1Max

iTrader: (1)

If you still use the Vortech FMU disc equation, for base fuel pressure of 52psi, an 8:1 ratio, and at 9psi, you'd have 1/2(base fuel pressure)+(PSIxRatio), so

1/2(52)+(9x8)=97.5psi of fuel pressure....that's way too high in my opinion.

A 6:1 would produce 85.5psi, which is as high as I'd personally ever go.

That would make:
290cc-->~407cc~372bhp
380cc-->~533cc~487bhp
440cc-->~617cc~564bhp
510cc-->~715cc~654bhp

Using a "safe" recommended 80% DC and BSFC=0.50 for SC'd cars.

booger

iTrader: (6)

Did Grubbs get the new injectors working ?...You havent posted any thing.....The Vortech guy would like to know