Phoenix H.O.

iTrader: (2)

Is a wolbro 255lph intank pump and 42#injectors a good setup for a 427 with a 200 wet shot of nitrous?

CLIFFRSRAMAIR

My guess is, no. I don't believe you will have enough consistent fuel pressure to feed the injectors and the nitrous jets. I am also guessing you do not have a direct port nitrous kit.

strokedls1

iTrader: (1)

I have a 49.5 lb injectors with a 255 walbro that worked ok up to a 150 shot on my 422ci.

PREDATOR-Z

He said wet shot.
42 ponders are sufficient to handle 600 rwhp.
1- What is your motor putting out NA
2- Your injectors are not supplying the fuel for the nitrous (wet), your fuel jets are.

So if your injectors are sufficient for your motor, they are sufficient for your N2O runs.

Now fuel pump is another question, depending on your NA motor output, you may need to upgrade to a bigger fuel pump.

IMO I would run a stand alone fuel tank and pump for the nitrous, that way you will not be affected by drops of fuel pressure at the rail due to the demand of a big shot of nitrous, not to mention you could run race gas in that tank and help your detonation.

CLIFFRSRAMAIR

[QUOTE=PREDATOR-Z]He said wet shot.

I understand he said "wet shot," that's why I said, " I am also guess you do not have a direct port."

I would like to know how you came up with this number, " 42 ponders are sufficient to handle 600 rwhp."

Thanks.................

PREDATOR-Z

Experience!

Part Number Delphi 01D030B (Lucas old 5208009, Lucas New 621031)
Static Flow Rate: 42.29 lb/hr @ 43.5PSI (300kPa) or 320gm/min
Static Flow Rate: 48.83 lb/hr @ 58.0PSI (300kPa) or 370gm/min

Notice the highlighted rate at 58 psi. The trick is to run an adjustable fuel regulator at the rail and make sure this psi is maintained or exceeded.
I run a Racetronix 255 with harness and I'm able to maintain 62 psi at the rail.
I'm running 560rwhp on SVO's 30 @ a 93% cycle on juice (dry) dual stage.