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Use this adapter board to fit both the Megasquirt and the adapter into your stock ECU case. This is the board for TPI small block Chevies from 1986 to 1989 ('165 ECU). Fits Camaros, Corvettes, Firebirds, and Trans Ams. Designed to work with the MegaSquirt-II only. It's nearly identical to the TBI adapter board, except it has been changed to the TPI pinout, R2 is not present, and it has a blue solder mask instead of green.
This is the bare adapter board. In addition to this PCB and a donor ECU, you will need the following parts to assemble this board: | Component | Description | Digi-Key Part Number | | LS1, LS2 | SPDT relay | 255-2080-ND | | R1, R4 | 1.0K resistor | 1.0KQBK-ND | | R3, R6 | 10K resistor | 10KEBK-ND | | R5 | 560R | 560KQBK-ND | | D1 | 4.7V 500mW zener | 1N5230BDICT-ND | | D2 | 1N4001 diode | 1N4001DICT-ND | | Q1 | TIP121 | TIP121GOS-ND | | Q2 | 2N3904 | 2N3904FS-ND | | J1 | DB37 female connector | 192-037-213-561-ND |
This adapter board is intended for MS-II applications so you can use the stepper IAC control. This board has provisions for controlling the lock-up torque converter and using the stock knock sensor input. It also lets you use the GM MAP sensor with appropriate mods to the Megasquirt. We have a complete page with assembly instructions for the GM TBI and TPI adapter board. CLICK HERE to see this article.
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