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
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