Hello Maybe some one can help me ? I have a 1994 Gen1 Viper with the following mods : - Harland Sharp 1,7 Roller Rockers + PushRods - 3" Belanger Headers + Spiralflow Muffler + Roeracing Muffler - Gen2 ThrottleBodys K&N Filters + SmoothTubes Gen2 fuel injectors - Under drive Crank Pulley - Greg Good Stage3 Heads (Shaved + 0,027 Gaskets for 10:1 Compression Ratio + Ported + 2,020" / 1,600" Valves) + Flow 302 cfm intake , 232 cfm exhaust side. - Wild Comp. Cam + Chris Jensen ECU tune - New Bosch 044 Fuel Pump - VEC2 fine tuning ??? Chris Tuned the Car very good , it runs great at idle and cruising , but is too lean at Wot in some RPM range Its to lean at about 2-3000 Rpm ( 14,7 ) + 4-5000RPM (14 ) but its to Rich from 3-4000RPM , iam at +200% fuel from 2-3000 RPM and iam at -170% Fuel at 3-4000 RPM , +6ms at WOT but there is no differrenc in AFR At first i thought the Stock original Fuel Pump is to old and weak so i addet a new Bosch 044 ( Shoul support 600HP , and i dont think i have that much HP) but it does not made a difference. The only thing that made a Difference in AFR is when i addet +11% Fuel injectors Pulse (+111%) The AFR come down 1 Full point from 15,7 to 14,7 but gets the AFR to Rich at 3-4000RPM What could be the Probleme , Fuel injectors ? Fuel Pressure ? Should i try a MSD Fuel pressure booster I also have The Primer Timer Relay in the Car because i had the Hard starting Problem , could this cause a weak Fuel Pressure at WOT ? Its hard for me to Understand when the Car is Rich at some RPM Range the Fuel Pressure cant be the Probleme , or is my thinking wrong ??? Maybe some VEC Tuning Experts can Help me out ?? I can send AFR Files ( ZEITRONIX ) and VEC2 Files per email [email protected] Greetings From Austria Mike
