Base Fuel Pressure change and A/F relation
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From: Raleigh, NC
Base Fuel Pressure change and A/F relation Is there a way to calculate/approximate how much A/F is raised or lowered based on varying the base fuel pressure? I found some things at the dyno... WAY too rich! Got my Inj DC down to 80% at 6000, about 85% at 6500. 
But, the curve where I get my most horsepower, I dropped the RPM/PE table tot he floor (11:1 at some points). So, though I got a good handle on making these injectors work, I need to find a good base fuel pressure (lower) to tune in the street until I go back.
Gotta run to work. I'll post some more details.
But, the curve where I get my most horsepower, I dropped the RPM/PE table tot he floor (11:1 at some points). So, though I got a good handle on making these injectors work, I need to find a good base fuel pressure (lower) to tune in the street until I go back.
Gotta run to work. I'll post some more details.
What size Injectors are you running again? For my 370 i went with Motron 60#ers and i set my Reg. at a 56psi base. The Reg is a Aeromotive boost ref, but i havent used the rate rise yet. I didnt need it. FP was steady as a rock on the dyno. That might have something to do with my pump though.... Bousch external 420L.
Kyle
Kyle
Black LS1TA on a different note those 3.73 gears have got to be hurting your MPH. In my car with much less power than yours I was trapping at 6300rpm w/3.42 gears, I went to 3.73s and was traping at 6800rpm. My car lost about 2mph because I was so far past my peak hp at 6300rpm. I`ll bet you could pick up at least 5mph with your power staying at a more optimum rpm(lower rpm). Just my .02.
Thread Starter
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Joined: Nov 2001
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From: Raleigh, NC
I've thought of that. At full boost, I will see. But, keep in mind, I have 28" tall ET Streets. 
That makes a difference, too. When my boost was dying off, I was only about 5800 RPMs or so in 3rd in the traps (10.84 @ 124 MPH). I think I SHOULD be trapping about 130+ when I'm done... but, I think these tall tires may still get me there. My RWHP curve does not start to drop below 500 RWHP until 6400 RPMs or so.
That makes a difference, too. When my boost was dying off, I was only about 5800 RPMs or so in 3rd in the traps (10.84 @ 124 MPH). I think I SHOULD be trapping about 130+ when I'm done... but, I think these tall tires may still get me there. My RWHP curve does not start to drop below 500 RWHP until 6400 RPMs or so. Thread Starter
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Joined: Nov 2001
Posts: 3,048
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From: Raleigh, NC
Originally Posted by Black LS1 T/A
Is there a way to calculate/approximate how much A/F is raised or lowered based on varying the base fuel pressure?
