Sensors and valves

INJECTORS

As my original injectors were stuck and not very powerful I decided to get another second-hand injectors set. If I remember correctly the 20XEs originals are 214cc/min, I managed to get Saabs (also in GM brand) redtops 350cc. While MegaTune and TunerStudio software have injector testing ability I decided to make myself a little test-setup. Here is a picture of it in progress:

Purpose of the test is to make sure that every injector has same fuel misting abilities - visual check. And also to check that same amount is output from each injector. Also to make sure how the cc/min turns up?

COOLANT TEMERATURE SENSOR

The original 20XEs CTS has following parameters:

• 0 °C = 32 °F -- 6600 ohms
• 40 °C = 104 °F -- 1400 ohms
• 80 °C = 176 °F -- 380 ohms

INTAKE AIR TEMPERATURE SENSOR

as there isn't such thing in original setup it has to be taken from other models. I use IAT sensor from Audis 1.8 litre turbo engine Bosch 0 280 130 085. I found a pdf (page 51) on web which has a diagram °C/Ω

From drawing it seems about so:

-10°C ~ 10kΩ

47°C ~ 1kΩ

130°C ~0.1kΩ

VARIABLE RELUCTOR (engine speed, crank angle sensor)

is positioned at 120 degrees before top dead centre (BTDC).

Thinking out loud:

Sprocket with 60 tooth has 6° per tooth. Missing teeth are #59 & #60. Count of teeth between TDC and #60 is 20. As it is result of visual inpection and not an official data - there is still need for timing storboscope for ign timing settings

MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR

this one is installed on MegaSquirts motherboard. On my experience it does not need any reconfiguration.

THROTTLE POSITION SENSOR

original TPS does not work with MegaSquirt as it is actually Wide Open Throttle on/off switch. Need is for potentiometer. I replaced it with 20XEVs TPS. It does require middle plate to position it right.