Supercharging?

[Venom351R]

No way 30's are going to cut it on 331 with HCI. Your going to need to 42's

I had a 95 GT w/ a Paxton Novi 2000 10 PSI. Cobra Intake, stock heads, stock cam. Running 30# injectors and it was not enough I had to upgrade to 42's

 

[HGFireHazard]

If your regulator is working properly and is tapped into the manifold at the right place, you will see boost and fuel pressure increase in a 1:1 ratio.

If your base fuel pressure is at the stock setting (39psi), you will see 49psi at the rail under 10psi of boost. All this is doing is keeping the same pressure at the injector tip. If there is 10PSI of air pushing air INTO the injector, you also need 10PSI more pressure pushing fuel out to keep it equal so that the PCM can calculate the required fuel.

Wes

At idle I see about 31 psi at the fuel rail and under boost (between 9-10 psi) I see around 40 psi at the rail.

Is the 39 psi supposed to be under full throttle?

Like I said, my t-rex has been giving me terrible problems, but I don't have any problems with the car or my A/F ratio. What gives?

I have the stock FPR and an autometer mechanical guage (sender where the schrader valve was).

 

[StadEMS3]

I'm not sure what my compression ratio is, My friend who helped build the engine thought around 10:1? I had the stock block bored .030 over, the DSS stroker kit and unmodified AFR 165's. The car is never raced or abused and is more for show and sunny day driving. Like I said my goal was 400rhp any above that would be gravy. My Dyno numbers peaked at around 5000rpm for HP and 4000rpm for tq. So, what ever is the best route, I'm there.

 

[Stanger007]

What gives?

I'll drop ya a PM so we don't overrun Stad's thread.

Stad, good luck on the choice, I think a supercharger kit may be just what you want, but count the cost before you make the decision, adding another easy 100-150rwhp will stress your entire driveline, especially if you want to hook the tires.

In addition to the kit and whatever fueling you decide to go with, you'll also need a retune for your chip, this will be what makes or breaks your combo (quite literally)

Wes

 

[MattZ281LE]

Man I heard on the Internet the Cobra intake sucks.

Sounds like Jay set you up good, nice #s.

Are those 60s or larger?

Wes

I have 60# injectors, street sleeper tank, 2x Pierberg pumps, SX regulator/filters Aeromotive rails. -10 supplying the pumps -8 from a Y block supplying the rails individually, -6 from each rail to the reg and a -6 from the regulator to tank.

Under boost I see about 52 or so psi on FP.

Jays cam is pretty tame sounding. On paper it looks bigger than it is.