I bought my Vortech SFMU used and now im not exactly sure what spring it has in it after looking at it.


It looks like regular steal coil (some slight rust) not painted "silver or black"

It sits just barely above the hole in the housing that it slides into.

So when you guys say i have the "black" one or i have the "silver" one what size are they and are they painted because mine looks like just plain old steal.


thanks, jason

1999 GS, 420a, Airwerks K26 Turbo, All custom piping, Tial 40mm WG, Tial 50mm BOV, Apexi SAFC II, AVC-R and turbo timer, 255 walbro pump, 38lb INJ, Venom Fuel rail, FMIC, 60mm Modern Performance TB, Ported Mani, AGX struts, 19" Rims, blah blah blah....

u have the black well its not actually black just dark . u cant mistake it for the silver which is really silver color

LED tails : Done for now!
99 eclipse rst
cobalt blue met. paint,star stage 2 upgraded t3/t460trim turbo ceramic coated , polished compressor housing, ,optima yellow top, chrome i/c piping ,front mount ntercooler ,apexi turbo timer . zeitronix wb02 ,faze oil ,boost gauge,egt ,bosch 4x plugs,kyb agx struts, pro kit springs.17''adr venomous rims,Falken azenis ,brembo dilled/slotted rotors ,turbo xs bov ,oil catch can,manual shiftknob,autometer pyrometer egt , vortech sfmu,b&m fuel pressure gauge ,accel 310cc injectors ,gasketmatched and polished intake manifold ,58mm throttle body ,no egr,polished turbonetics wastegate,fuel pump rewire,homade fcd and a lot more .LED reverse lights ,sidemarkers and tails .atx to mtx swap . South bend tz clutch . Tons more
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So then what is the difference between the two?

If I have the 2.72 /10:1 disc and ring. will the dark spring drop that rate to 8:1? Or does it just allow the user to lower the static pressure more.


Background: im trying to set up my fuel curve properly. I have 400cc/ 38lb injectors and only boosting 5psi max. (stock internals) (255hp walbro)

I have the SFMU but only the 10:1 disc and dark spring.

So im trying to determine if I should spring for the ~300cc injectors with my current set up or buy a 4:1 disc and ring and try to make that work with my 38lb injectors.

What do you think is the better way to go?

1999 GS, 420a, Airwerks K26 Turbo, All custom piping, Tial 40mm WG, Tial 50mm BOV, Apexi SAFC II, AVC-R and turbo timer, 255 walbro pump, 38lb INJ, Venom Fuel rail, FMIC, 60mm Modern Performance TB, Ported Mani, AGX struts, 19" Rims, blah blah blah....