Fuel System Modifications
#1
Rotary Freak
Thread Starter
Fuel System Modifications
Here's something I've been thinking about:
If I replaced my stock 460cc injectors with 550cc primaries, threw on two 550cc secondaries, got a new fuel pump, fuel rail, and fuel pressure regulator along with a Haltech F5 (to control the extra injectors), would I be able to alter my air/fuel mixture so that I would have MORE fuel and more air flowing into the engine? If so, how much power would this make. I currently have an AFC-II, so I was thinking that I could use that to alter the A/F ratio.
My concerns are that the stock ports would not be able to throw all this fuel and air into the engine effectively. Does anyone know if this could work and pick up some power?
If I replaced my stock 460cc injectors with 550cc primaries, threw on two 550cc secondaries, got a new fuel pump, fuel rail, and fuel pressure regulator along with a Haltech F5 (to control the extra injectors), would I be able to alter my air/fuel mixture so that I would have MORE fuel and more air flowing into the engine? If so, how much power would this make. I currently have an AFC-II, so I was thinking that I could use that to alter the A/F ratio.
My concerns are that the stock ports would not be able to throw all this fuel and air into the engine effectively. Does anyone know if this could work and pick up some power?
#3
Former Moderator. RIP Icemark.
Are you making more than 220-240 HP that you need bigger injectors?
Putting bigger injectors on won't really help anything until you get to that power level or are going with Nitrous as non-turbos run way way rich on the 2ndaries anyway
Putting bigger injectors on won't really help anything until you get to that power level or are going with Nitrous as non-turbos run way way rich on the 2ndaries anyway
#5
Originally posted by Icemark
Are you making more than 220-240 HP that you need bigger injectors?
Putting bigger injectors on won't really help anything until you get to that power level or are going with Nitrous as non-turbos run way way rich on the 2ndaries anyway
Are you making more than 220-240 HP that you need bigger injectors?
Putting bigger injectors on won't really help anything until you get to that power level or are going with Nitrous as non-turbos run way way rich on the 2ndaries anyway
#7
Rotary Freak
Thread Starter
Originally posted by 13bpower
Icemark made a very important point here. Highly modified N/A's pick up more power from a AFC by decreasing the fuel at high rpms. They already run pig rich under stock ECU control. Get your car dyno tuned and you could pick up as much as 15 wheel HP on the top end. Add bigger injectors and you are just creating problems.
Icemark made a very important point here. Highly modified N/A's pick up more power from a AFC by decreasing the fuel at high rpms. They already run pig rich under stock ECU control. Get your car dyno tuned and you could pick up as much as 15 wheel HP on the top end. Add bigger injectors and you are just creating problems.
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#9
Rotary Freak
Thread Starter
Around the end of the year I'm thinking of going forced induction. Do you think that 550cc secondaries and a Nippondenso performance pump would be able to provide enough fuel for as much as 250whp?
#10
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Join Date: Jan 2004
Location: Utah (land of mountains)
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Originally posted by snub disphenoid
Around the end of the year I'm thinking of going forced induction. Do you think that 550cc secondaries and a Nippondenso performance pump would be able to provide enough fuel for as much as 250whp?
Around the end of the year I'm thinking of going forced induction. Do you think that 550cc secondaries and a Nippondenso performance pump would be able to provide enough fuel for as much as 250whp?
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