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| * if you remove the EGR passage, fit a blocking plate | * if you remove the EGR passage, fit a blocking plate | ||
| * the only vacuum hoses needed are the one to the regulator, and one from the throttle body yo the distributor | * the only vacuum hoses needed are the one to the regulator, and one from the throttle body yo the distributor | ||
| + | * an O2 sensor is not required | ||
| With MegaSquirt you won't need the Datsun airflow meter. Instead, Megasquirt will calculate the air mass using a TPS and and IAT sensor. | With MegaSquirt you won't need the Datsun airflow meter. Instead, Megasquirt will calculate the air mass using a TPS and and IAT sensor. | ||
| * Obtain a 240SX TPS, remove the EGI TPS and bolt on. | * Obtain a 240SX TPS, remove the EGI TPS and bolt on. | ||
| * Obtain GM IAT sensor. Drill hole in your air cleaner-to-throttle body pipe, and hot-glue the IAT in place. Or use JB-weld. Threaded bungs are available if you want to get really fancy. | * Obtain GM IAT sensor. Drill hole in your air cleaner-to-throttle body pipe, and hot-glue the IAT in place. Or use JB-weld. Threaded bungs are available if you want to get really fancy. | ||
| + | |||
| + | Use a 280ZX fuel pump, plumbed into the stock fuel line.. Connect the fuel reg output to.a line teed into the filler hose. If you keep the tank above 1/4 full no baffles or surge tank are needed. | ||
| Wire up the Megasquirt harness | Wire up the Megasquirt harness | ||
| Line 28: | Line 31: | ||
| In the MS tuning software configure | In the MS tuning software configure | ||
| - | * select Nissan temp sensor | + | |
| - | ** -40F 30-33000 ohms | + | Nissan temp sensor |
| - | ** 80F 2000-2500ohms | + | -40F 30-33000 ohms |
| - | ** 160F 360 ohms | + | 80F 2000-2500ohms |
| + | 160F 360 ohms | ||
| * select Nissan TPS | * select Nissan TPS | ||
| * Constants | * Constants | ||
| Line 39: | Line 43: | ||
| -40F 180% | -40F 180% | ||
| -20F 150% | -20F 150% | ||
| - | 0F 140% | + | 0F 140% |
| 20F 135% | 20F 135% | ||
| 40F 130% | 40F 130% | ||
Revision as of 16:11, 12 February 2015
Buy MegaSquirt II fully assembled ($400).
Obtain an A14 or A15 EGI factory Datsun fuel injection manifold. Make sure it has the factory rising rate regulator and fuel injectors included and the factory throttle body.
Everything else may be removed from the manifold.
- if you remove the EGR passage, fit a blocking plate
- the only vacuum hoses needed are the one to the regulator, and one from the throttle body yo the distributor
- an O2 sensor is not required
With MegaSquirt you won't need the Datsun airflow meter. Instead, Megasquirt will calculate the air mass using a TPS and and IAT sensor.
- Obtain a 240SX TPS, remove the EGI TPS and bolt on.
- Obtain GM IAT sensor. Drill hole in your air cleaner-to-throttle body pipe, and hot-glue the IAT in place. Or use JB-weld. Threaded bungs are available if you want to get really fancy.
Use a 280ZX fuel pump, plumbed into the stock fuel line.. Connect the fuel reg output to.a line teed into the filler hose. If you keep the tank above 1/4 full no baffles or surge tank are needed.
Wire up the Megasquirt harness
- 12V
- earth/ground
- fuel pump relay
- injectors
- TPS
- Red to Vref
- White to TPS
- Black to TPS ret
- IAT
- Air Regulator
- EFI Water Temp
- Tach signal
Obtain a dropping resistor pack, and splice into injector wires
In the MS tuning software configure
Nissan temp sensor -40F 30-33000 ohms 80F 2000-2500ohms 160F 360 ohms
- select Nissan TPS
- Constants
- VE table
Warmup enrichment -40F 180% -20F 150% 0F 140% 20F 135% 40F 130% 60F 125% 80F 118% 100F 110% 130F 103% 160F 100%
Start your engine.