You'll need another tune. The fbody regulator doesn't have a vacuum reference port. The pressure is regulated at a flat 58 lbs. I would think that would be a more predictable fuel source to tune with since the truck's fuel pressure falls to 50 lbs at idle and cruise.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
<div class='quotetop'>QUOTE(RedHeartbeat @ Jan 27 2007, 11:00 AM) [snapback]81386[/snapback]</div>yes i know i need another tune.You'll need another tune. The fbody regulator doesn't have a vacuum reference port. The pressure is regulated at a flat 58 lbs. I would think that would be a more predictable fuel source to tune with since the truck's fuel pressure falls to 50 lbs at idle and cruise.
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my fuel system is return style so i am using a 97/98 vette fuel rail which the regulator on it is equipped with a vacuum reference port.
thanks for the fuel pressures.
11' Sierra 6.2 NHT
14.46@91 Stock
89' Mustang LSX
10.35@130 pump gas LQ4
Knothead Racing
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