10-24-2011, 06:08 PM
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#27 (permalink)
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NOT AN ACTIVE SPONSOR. DO NOT BUY
Join Date: Dec 2008
Location: CALIFORNIA
Posts: 913
Drives: 370Z
Rep Power: 18
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Quote:
Originally Posted by phunk
^^^ and the white dragon is using a twin fuel pump assembly. in this circumstance its a requirement. An external regulator is required. The stock regulator is a part of the stock fuel pump assembly. With the twin assembly, its gone. And we didnt make a way to include it in the twin pump because it would be too small to handle twin fuel pumps unless you were to stage the pumps (activate the second pump only at high load).
Sam, youre not using a vacuum line on the regulator on that car are you?
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Of course it is...we're using a rising fuel pressure regulator, which has made it a ************ to tune. Keep in mind that the VVEL vacuum variation has a negligible affect on fuel pressure under vacuum, since the difference is only a few psi between low vacuum and high vacuum. Once you're in boost, that is no longer a concern and the rising rate fuel pressure regulator does what it needs to do.
BTW, your Twin Pump setup is doing its job very well.
Sam
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