best fuel pressure regulator for rb25 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

smoked240 · 12-25-2011, 09:10 AM

I have been needing a fuel pump and regulator for the longest time. Right now I'm pushing somewhere in the 250-300hp. I plan to be at 450 soon. Will the walboro 255 cut it at 500hp? And which would be the best pressure regulator? I have been looking at the tomei type l or type s. Which one would be best for me? Thanks for the help!

redline racer510 · 12-25-2011, 10:50 AM

Raw brokerage sells a complete kit which uses an aeromotive fpr seems like a pretty good deal

Detroit.Tee.Tee · 12-25-2011, 10:54 AM

Tomei has a calculator on their site. It depends on a few factors really. Injector size, fuel pressure, line size. I have a single wal 255 and with my 850cc injectors and -6an fittings and lines the calculator said to make 450 hp, I'd need something like 364lph.

smoked240 · 12-25-2011, 11:15 AM

Okay. Well ill have stock injectors for now. Which are like 380cc?? Not for sure on size. Later I will be going to larger. So ill have the 255lph pump,stock lines for now,with stock injectors.

jr_ss · 12-25-2011, 11:48 AM

Tomei, SARD, Aeromotive, etc will all do what you need it too. I was running 400+ crank hp on my SARD and it operated fine, plan on running into the 600's with the new setup on the same regulator...

smoked240 · 12-25-2011, 12:26 PM

Could I have too much ever? Like if I went with the type l rated for very high HP.would I be okay?

jr_ss · 12-26-2011, 10:46 AM

If the regulator accepts -6 to -8 AN lines you'll have enough flow through it for 700hp+ and you'll never reach that point on a stock or close to stock bottomend. For your goals that's all you'll ever need. Why spend extra cash on something you'll never fully utilize?

r33nota240 · 12-28-2011, 04:14 PM

a 255 fuel pump should do just fine for that hp unless u are planning e85 and i am running a aeromotive and have no problems with fuel pressure drop.

12-25-2011, 09:10 AM	#1
smoked240 Zilvia FREAK! Join Date: Jun 2010 Location: North Dakota Age: 30 Posts: 1,066 Trader Rating: (4) Feedback Score: 4 reviews	best fuel pressure regulator for rb25 I have been needing a fuel pump and regulator for the longest time. Right now I'm pushing somewhere in the 250-300hp. I plan to be at 450 soon. Will the walboro 255 cut it at 500hp? And which would be the best pressure regulator? I have been looking at the tomei type l or type s. Which one would be best for me? Thanks for the help! __________________

12-25-2011, 10:50 AM	#2
redline racer510 Zilvia FREAK! Join Date: Dec 2007 Location: EARFF(earth for you idiots) Posts: 1,072 Trader Rating: (1) Feedback Score: 1 reviews	Raw brokerage sells a complete kit which uses an aeromotive fpr seems like a pretty good deal __________________ WARNING: User has a low tolerance for stupidity. Post at your own risk.

12-25-2011, 11:15 AM	#4
smoked240 Zilvia FREAK! Join Date: Jun 2010 Location: North Dakota Age: 30 Posts: 1,066 Trader Rating: (4) Feedback Score: 4 reviews	Okay. Well ill have stock injectors for now. Which are like 380cc?? Not for sure on size. Later I will be going to larger. So ill have the 255lph pump,stock lines for now,with stock injectors. __________________

12-25-2011, 11:48 AM	#5
jr_ss Post Whore! Join Date: Dec 2005 Location: Pa Posts: 6,056 Trader Rating: (34) Feedback Score: 34 reviews	Tomei, SARD, Aeromotive, etc will all do what you need it too. I was running 400+ crank hp on my SARD and it operated fine, plan on running into the 600's with the new setup on the same regulator... __________________ My SR20VET

12-25-2011, 12:26 PM	#6
smoked240 Zilvia FREAK! Join Date: Jun 2010 Location: North Dakota Age: 30 Posts: 1,066 Trader Rating: (4) Feedback Score: 4 reviews	Could I have too much ever? Like if I went with the type l rated for very high HP.would I be okay? __________________

12-25-2011, 10:54 AM	#3
Detroit.Tee.Tee Zilvia Junkie Join Date: Apr 2011 Location: Livonia, Michigan Age: 45 Posts: 324 Trader Rating: (10) Feedback Score: 10 reviews	Tomei has a calculator on their site. It depends on a few factors really. Injector size, fuel pressure, line size. I have a single wal 255 and with my 850cc injectors and -6an fittings and lines the calculator said to make 450 hp, I'd need something like 364lph.

12-26-2011, 10:46 AM	#7
jr_ss Post Whore! Join Date: Dec 2005 Location: Pa Posts: 6,056 Trader Rating: (34) Feedback Score: 34 reviews	If the regulator accepts -6 to -8 AN lines you'll have enough flow through it for 700hp+ and you'll never reach that point on a stock or close to stock bottomend. For your goals that's all you'll ever need. Why spend extra cash on something you'll never fully utilize? __________________ My SR20VET

12-28-2011, 04:14 PM	#8
r33nota240 Leaky Injector Join Date: Nov 2011 Location: overland park ks Age: 36 Posts: 116 Trader Rating: (1) Feedback Score: 1 reviews	a 255 fuel pump should do just fine for that hp unless u are planning e85 and i am running a aeromotive and have no problems with fuel pressure drop.

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