race u 2

Ok been out of the game for awhile. just pulled the cover of the car and blowed the dust off. I'm thinking of playing around with my NOS but not sure if my INJ are big enough. The last data log I had the inj duty cycle was hitting 73. So can i shoot say 125 shot to it or 50 any opinions. I will start out low at 50 and go up but have heared some people talk about locking up inj so should i just go get a new setof inj?

race u 2

It is a NOS 5176 LT1 dry kit that boost the fuel psi If that would help any.

Injuneer

As I explained in your duplicate thread, that kit includes an inline booster pump, and uses a slipstream of nitrous off the blue pressure regulator to apply a pressure to the vacuum connection on the engine's fuel pressure regulator, raising the fuel pressure. Pressure is typically in the range of 85-90psi.

That means your 30 #/HR injectors (SVO's are flow rated at 39.15psi) will flow 44.2 #/HR. They are already flowing 31.6 #/HR if you have a stock fuel pressure regulator, controlling the system to 43.5psi.

You indicate you max out at 73% DC with your current injectors, running without the nitrous. If you work backwards from the 73% DC, the injector flow rating, and assume a very efficient tune resulting an a brake specific fuel consumption (BFSC) of 0.45 #/HR/HP, it indicates your current setup makes about 410HP at the flywheel, which seems a bit low for the mods you list. Are you currently running "stock" fuel pressure (43.5psi without the vacuum line connected)?

If the engine is making 410HP and you are running 43.5psi (without the vacuum compensation) you should be able to support a dry 150-shot with those injectors.

KW Baraka

If you do decide to go with bigger injectors, I have a set of 42lb SVO's(zero miles sine refurbishing) and a set of 42lb Lucas injectors (approx 30K miles).

Jus' sayin'........

KW

race u 2

Yes the fuel PSI is set at 43.5 psi the regulator is not stock though. The vacum line is hooked up. Should I not have vacum line hooked up and should I be running the the fuel PSI higher? I got the tune from PCM for less to run on pump gas with intentions of learning how to tune myself. But I've had to let car sit for the last couple years. I have gotten a fast dual sensor wideband any help I could get would be great.

race u 2

KW what R u looking for for the 42lb's SVO's

Injuneer

The vacuum line only needs to be disconnected to measure the fuel pressure. You want 43.5psi WITHOUT the vacuum compensation. Then put the vacuum line back on the FPR.

If you set it at 43.5psi with the vacuum line connected, your fuel pressure is too high. This is based on the assumption that you told pcmforless that you were running 43.5psi.

Please conduct parts for sale business via PM. It is not permitted in the tech forums.

race u 2

Thanks for the help.