Tag Archive for IS-F

Transmission ECU – More circuits (General purpose, PWM, heavy outputs)

The next step is our base circuits for the board. We have 4 General Purpose outputs, GPO1 – GP04 located to centre of the board. The Circuits GPO1 – GPO4 are made up from 1.0K Ohm, 1/8 Watt) in R13, R15, R17, R19 and 4 NPN in Q9, Q10, Q11, Q12



next we have our VB1, VB2, VB3, VB4 out put circuits. We begin by adding links to R5, R6, R7, R8. We are using 1.0K Ohm, 1/8 Watt resistors instad of wire links as we may want to scope these outputs at a later date.

Next we install and solder 30V Zener diodes {1N4751ADICT-ND} in D11, D12, D13, D14

To Complete the VB Circuits we install the Heatsink. we then Install and solder four large TO-220 size NPN transistors {RFP30N06LE-ND} in Q5, Q6, Q7, Q8 and insulators (under Q5, Q6, Q7, Q8){4724K-ND}) on the heat sink in positions. A liberal amount of heat sink grease is used :)


Next we have our PWM1, PWM2, PWM3, PWM4 Circuits. First we solder in our main jumpers in R1, R2, R3, and R4. In R9, R10, and R12 we use 1K ohm resistors and a wire jumper in r11


Install and solder 30V Zener Diodes {1N4751ADICT-ND}, D8, D9, D10. We then Install heatsink and solder 3 large TO-220 size NPN transistors {RFP30N06LE-ND} in Q1, Q2, Q4

We finish off the PWM circuits by installing and heatsinking a RFP30N06LE-ND into Q3




Disecting the DI system

just some rough notes in how we might control the DI EDU’s



Auto to manual….


Well in Prep for a manual Conversion the first step is to find a suitable bell Housing, and the one below may be the answer. The IS-F 8 speed is a one piece design case so looking at other similar ‘ur series’ engined vehicles the TOYOTA SEQUOIA 4600CC 32-VALVE DOHC EFI, AUTOMATIC 6-SPEED SR-5 Model seems to be a good candidate.

Part no. 351110C030





the star of the party arrives…5 Litres of Jap muscle

well after myself and Colin endured a 500mile trip involving boats, tempermental Vans, and a Sat Nav suffering fom extreme Dyslexia we finally have in all its glory the main attraction. 2009 Lexus IS-F 5.0L V8 2ur-gse arrives at SSI  !!!!!


now thats me being Smug ;)


The donor Car – 1998 Supra MKIV Jspec n/a

So the lucky car in question is a 1998 mkiv supra, a Jap spec non turbo manual. The car has already been raped of its v161 transmission as most do for a 2jzgte manual conversion. The body is flawless but has been subject to being dressed in a silly frock. So the first steps where to remove the dress, n/a 2jzge engine, and interior. As you can see the car was raped of a few other items in its life including  the Faelift rear lights.

So out came the very low mileage N/A 2jz-ge power plant which will return back to life as a Forged bottom end and an ideal replacement for a 2JZ-GTE block. waste not want not as my folks used to say.

Which in turn leaves room for the new engine..