Thinking of upgrading my 12PSI to 14PSI

[vegasviper]

Anyone running 14PSI pulley, anything i should know?

 

[STUGOTS]

I would think it would be "safer" to get ported heads (unless you already have them) with that kind of boost.

Im sure the Roe experts will chime in here.

 

[carguy07]

I would think it would be "safer" to get ported heads (unless you already have them) with that kind of boost.

Im sure the Roe experts will chime in here.

Same advice here. Open up those heads before adding boost. Otherwise you will just be backing up/heating the charge and could actually make less power.

 

[orlandov10]

Hello Vegas, how do you like that 12psi pully and what kind of #'s are you seeing? I have a 99GTS with a ROE S/C, its only boosting 6psi right now, I just bought it and installed a boost gauge / headers today. The mods are: full exhaust, no cats, headers, and of course the Roe blower kit. When you run 12 psi are you running just one Walbro 255 pump? I am thinking about going to the 10 or maybe 12 psi pully with a **** / water kit, what sort of #'s do you make on that pully? Also are you running Roe's **** injection? Any idea what size jets your spraying on the ****/water? I have a SMC ****/water kit that I was thinking about adding but I am unsure as to what size jet I should install, it came off my 700RWHP Supra so I need to add a second line / jet. 14 PSI sounds like it would be a blast on the street!

 

[vegasviper]

No #s yet.

No fuel pump upgrade

WM injection w/ (2) .625 jets

 

[Simms]

Do you have major boost creep now?

Open them heads up before you run a 14lb pulley and upgrade that fuel system.