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Engine specifications

* Volvo B21ET

** 4 cyl, OHC, 2 valves/cyl

** Stock B21ET bottom end

* Volvo V cam (279 degrees @ 0.51 mm, 11.37 mm valve lift)

* Custom intake plenum and 65 mm throttlebody

* Low impedance 900 cc/min injectors used with 6.8Ohm/50W resistors and a30 V TS diode on the flyback wire

* COPs from an Audi S4

* Long tubular turbo exhaust manifold

* Holset HX35 turbo, 55 in/60 out with 12 cm² exhaust housing.

* Large front mount intercooler

* Primary trigger consists of two metal points for simple trigger using Honeywell GT1 Hall-sensor, signal goes low 60 degrees before TDC.

* Secondary trigger is a lobe on the balance axel found in these engines, same rotational speed as the cam. Signal goes low after cyl 4 TDC and high again before TDC + 90 deg.

** The lobe was originally made for driving a mechanical pump

** The lobe has been shaped to be 10 mm wide and ends abruptly to get a good metal piece for the sensor

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Configuration

The car has only been run warm and mapped on low load with a malfunctioning generator, so all the maps are under development. Here are the files:

[msq] $FlgChr1$FlgChr> [config.txt] $FlgChr2$FlgChr> [tables.txt]

Current firmware is 1.0.73.

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Pictures