- Wed Jun 15, 2022 3:57 pm
#57430
Hello All!
I have a 1981 VW rabbit pickup that I am going to add Speeduino EFI to. After doing some research I have decided on a configuration and have started amassing all the parts to to do so. My main objective is to modernize the fuel system that I completely rebuilt last summer and had a great time doing so while learning how simple Bosch K-Jetronic Basic really is. Simple as K-Jetronic is (mostly just a toilet bowl that constantly dumps fuel into the intake ports ), I feel it is less efficient as having the total control over fuel and ignition that EFI offers. So I am doing my conversion in an effort to increase the fuel efficiency and possibly lower emissions. While at the same time bringing myself up to speed on what EFI is, How it is configured and how it functions.
Configuration goes as such:
Stock VW EN 1700cc N/A 4 cylinder engine
Going for a "Stock" appearing conversion
Bosch Style 2 wire temp sensor (replacing CIS thermo time switch in upper rad hose inlet)
Gm Style Intake Air Temp Sensor (Installed in a custom 3d printed airbox cover)
Throttle Position Sensor P/N 3517-37100 (going to print or machine "Piggy Back" adapter to sit on top of the stock throttle linkage)
Stock VW 037133317N fuel rail with integrated 3.0 Bar fuel pressure regulator and a custom fuel distribution block for feed and return ( so I can use the factory banjo fittings to one side and barbed fittings to and from the fuel rail )
Bosch 0280156006 fuel injectors (200cc 12.0 ohm do not know the dead time will most likely have to buy a portable scope to test) was going to use 0280150955's but got the bait and switch on amazon so I have what I have now, Live and Learn there.
I will set the injectors up paired and fire them paired alternating.
14point7 spartan2 lambda controller with LSU 4.9 wideband sensor
My first thought was to do fuel-only with just the distributor for ignition but I have changed my mind.
Ignition will be:
Wasted spark using VW type 032905106B coil pack. Most Likely mounted on the front of the block where the Control Pressure Regulator is now
Brand New Modified Distributor with internal hall sensor and a custom machined 12-1 or 24-1 (haven't decided yet) trigger wheel inside and a custom 3d printed "Blank" cap. I will also "Lock-Out" all advance vacuum and mechanical
I am planning on using Missing Tooth (Cam Speed) trigger setting.
All of this will be handled by a NO2C Speeduino in a custom 3d printed case. This will most likely be mounted inside the cab under the dash.
Couple quick questions for those in the know
Does anyone know what the Hall signal on the VW distributors is? 0v-5v or is It 5v-0v? I only ask because I do not posses a scope at the moment and do not have access to one.
Also If the Hall sensor outputs 0v-5v or the inverse can I connect that directly to the Speeduino with the correct jumper settings without having to run a VR conditioner?
I have a 1981 VW rabbit pickup that I am going to add Speeduino EFI to. After doing some research I have decided on a configuration and have started amassing all the parts to to do so. My main objective is to modernize the fuel system that I completely rebuilt last summer and had a great time doing so while learning how simple Bosch K-Jetronic Basic really is. Simple as K-Jetronic is (mostly just a toilet bowl that constantly dumps fuel into the intake ports ), I feel it is less efficient as having the total control over fuel and ignition that EFI offers. So I am doing my conversion in an effort to increase the fuel efficiency and possibly lower emissions. While at the same time bringing myself up to speed on what EFI is, How it is configured and how it functions.
Configuration goes as such:
Stock VW EN 1700cc N/A 4 cylinder engine
Going for a "Stock" appearing conversion
Bosch Style 2 wire temp sensor (replacing CIS thermo time switch in upper rad hose inlet)
Gm Style Intake Air Temp Sensor (Installed in a custom 3d printed airbox cover)
Throttle Position Sensor P/N 3517-37100 (going to print or machine "Piggy Back" adapter to sit on top of the stock throttle linkage)
Stock VW 037133317N fuel rail with integrated 3.0 Bar fuel pressure regulator and a custom fuel distribution block for feed and return ( so I can use the factory banjo fittings to one side and barbed fittings to and from the fuel rail )
Bosch 0280156006 fuel injectors (200cc 12.0 ohm do not know the dead time will most likely have to buy a portable scope to test) was going to use 0280150955's but got the bait and switch on amazon so I have what I have now, Live and Learn there.
I will set the injectors up paired and fire them paired alternating.
14point7 spartan2 lambda controller with LSU 4.9 wideband sensor
My first thought was to do fuel-only with just the distributor for ignition but I have changed my mind.
Ignition will be:
Wasted spark using VW type 032905106B coil pack. Most Likely mounted on the front of the block where the Control Pressure Regulator is now
Brand New Modified Distributor with internal hall sensor and a custom machined 12-1 or 24-1 (haven't decided yet) trigger wheel inside and a custom 3d printed "Blank" cap. I will also "Lock-Out" all advance vacuum and mechanical
I am planning on using Missing Tooth (Cam Speed) trigger setting.
All of this will be handled by a NO2C Speeduino in a custom 3d printed case. This will most likely be mounted inside the cab under the dash.
Couple quick questions for those in the know
Does anyone know what the Hall signal on the VW distributors is? 0v-5v or is It 5v-0v? I only ask because I do not posses a scope at the moment and do not have access to one.
Also If the Hall sensor outputs 0v-5v or the inverse can I connect that directly to the Speeduino with the correct jumper settings without having to run a VR conditioner?