0taku

iTrader: (5)

Don’t blame ya, a lot of people keep asking me about what I’ll be reaching. I just guess 700-750.

thatv35guy

iTrader: (1)

I'd definitely pair the fuel pump with a voltage booster (either a Kenne Bell or a JMS). Even if you could manage to make due with 525 pump alone you'll be at the jagged edge of that pump's capability, a voltage booster will give you additional stability and safety.

thatv35guy

iTrader: (1)

One other interesting tidbit on fuel pumps, pressure, and injectors I'll drop in this thread…

So obviously if you’re injector limited you can increase your base fuel pressure to get more flow out of your injectors.

I tried a pretty substantial increase in base fuel pressure to see how much more flow I could net. I ended up increasing the base fuel pressure to a 61 psi (61 psi w/vacuum reference line connected and 68 psi disconnected), this was up from my previous base fuel pressure of 43.5 psi. This increase netted me an additional 200cc’s of injector.

Unfortunately, this bump in fuel pressure created a new issue. Once the car was at normal operating temps the car started to run extremely lean at idle and the hotter the car got the leaner the car ran. I tried a large increase in fueling at idle but that didn’t work. What I eventually realized was that was just too much fuel pressure to run the car at idle, I think with that much fuel pressure/atomization the fuel was basically evaporating when it hit the hot manifold/cylinder port.

I found a happy medium at just over 51 psi (58 psi w/vacuum reference line connected), the car idled perfectly and I was able to squeeze an additional 100cc’s out of the injector (every 1 psi of fuel pressure netted +12.5cc’s of injector flow).

bealljk

iTrader: (13)

interesting for sure ...

my ID1000s are rated at 43psi and at our 52psi I am pushing a little short of 1100cc (1080cc?? IIRC??) But it does make sense that flow will go up with pressure.

thatv35guy

iTrader: (1)

Yeah, I've got DeatschWerks Denso bodied 1000cc injectors in my car, at 58 psi of base fuel pressure I'm getting about 1250cc out of them. *All numbers I'm getting from my ProEFI and they appear to be pretty accurate.

aaronbc

Update: I got everything installed (S1 return system, upgraded wiring, 525lph pump, 1000cc injectors). To flush out the line and test I just ran the fuel line into a gas can. Flow looked good. After that I connected the fuel line and pressure regulated at ~52psi with no apparent leaks. I can't start the car until I figure out how to tune things for the bigger injectors and uprev MAF GT after I install the supercharger kit.

I was able to use the stock fuel strainer and although the basket doesn't compress all the way, it compresses enough to fit in the tank. I know I'm close to bottoming out on the strainer but I don't understand why I would need more clearance. If needed, I could trim down the strainer a little to gain a few more millimeters. What is the purpose of the fuel basket compressing anyways? I don't see why it would move at all after being installed in the rigid fuel tank.

Thanks for the help!

OldManZ350

iTrader: (23)

The Biggest Restriction you have as far as Flow is the Feel Line.
CJM makes a -8 or 1/2" Feel Line that comes with the Stage 2 kit.
The Stock 350Z Feed Line is is Very Tiny.