SBC HEI 7 PIN large cap Distributor

For discussing how to choose sensors and create a wiring harness for all Bowling and Grippo versions of the MegaSquirt® EFI controller.
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84tpivette
MegaSquirt Newbie
Posts: 14
Joined: Sat Nov 09, 2013 10:14 pm

SBC HEI 7 PIN large cap Distributor

Post by 84tpivette »

Hello all need to figure out the Ignition wiring MS2 V3. Using a sbc large cap (with coil in cap) Distributor has 4 wires coming out of housing

tach signal is a purple wire with a white trace [pin R] db37 pin #24
advance control signal is a white wire [pin E] db37 pin #36
override (cranking) signal is a tan wire with a black trace [pin B] going thru relay and 5v coming from tps ref
ground is a black wire with a red trace [grounded to distributor case] grounded at ecu point

Used this diagram and board modded for HEI from same page
Image


i have all wired up but CKP- (black shielded) and bare wire in shielding don't go anywhere What do i do with the two wires
1984 Corvette TPI(no longer cease fire) ms2 v3 in the works
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Matt Cramer
Super Squirter
Posts: 2951
Joined: Sat Jul 03, 2004 11:35 am

Re: SBC HEI 7 PIN large cap Distributor

Post by Matt Cramer »

Nothing, on a 7 pin HEI module. The black wire would be used for the ground pin on an 8 pin unit, and the shield is only grounded at one end.
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84tpivette
MegaSquirt Newbie
Posts: 14
Joined: Sat Nov 09, 2013 10:14 pm

Re: SBC HEI 7 PIN large cap Distributor

Post by 84tpivette »

Thank you so far everyone is helpful and and willing to take the time to help other's out
1984 Corvette TPI(no longer cease fire) ms2 v3 in the works
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