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band aid is the word
Posted by dave n (more from dave n) on Wed, 16 Jan 2002 20:09:11
In Reply to: Re: you're talking stock fpr, Alex, Wed, 16 Jan 2002 17:20:53
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I'm no expert either, just enthusiast like most others. Injectors are rated with an assumed constant fuel pressure, like 2.5 bar or 3 bar. I believe that rating assumes the fuel being sprayed into ambient pressure, as if you held it and let it spray into a measuring jar. Then they rate them at pounds per hour. Consider this: If you kept fuel pressure at 30 psi and had a turbo that boost to 30 psi.. the difference would be zero and the injector wouldn't squirt! So they (oem) keep the difference constant, for constant differential pressure. Rising rate reg really is a band aid for the ecu software. The higher the boost pressure, the more the rising rate reg raises the fuel pressure. That means the differential pressure is no longer zero. Instead, the difference becomes larger and therefore forces more gas with each injector opening. It's a band aid fix because with modified ecu software we could simply open the injector longer to get more gas. That lessens fuel pressure and strain on the fuel pump. But unless you can program eproms..
dave
posted by 68.10.242...
Posts in this Thread:
- rrfpr: 300k rpm vs. 5500 rpm, dave n, Tue, 15 Jan 2002 20:40:35
- Re: rrfpr: 300k rpm vs. 5500 rpm, Brad, Wed, 16 Jan 2002 12:13:07
- It doesn't matter, Jay Hassinger, Wed, 16 Jan 2002 08:54:04
- C900/9k, US spec, AIC, Kevin K , Tue, 15 Jan 2002 21:48:02
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