Converting EFI to Carb Gen IV 454 Gen V VI 502

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10-12-2023 | 03:28 AM

#11

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From: On A Dirt Floor

I’ve done what TomZ has shown. With GM/Merc EST.

10-12-2023 | 01:14 PM

#12

TomZ

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Honestly, the simplest deal going. It just works.

10-12-2023 | 11:01 PM

#13

pouliotk2441

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Quote:

Originally Posted by TomZ

Keep the EST. You can buy the pig tail on Amazon for less than $20 or take what you need from the injection harness and splice (I went this route).

Diagram for the EST below. Ignore the 4-pin connector - you’ll no longer need to plug anything into it.

The distributor shown is for a MOPAR adaptation of the GM module so don’t worry about those. You’re interested in the + and C connections.

Set your total timing at 3k rpm. 32 degrees total is probably good on a stock iron-head 502.

thank you ! Ended up using the EST setup and it already sounds 1000x better

10-13-2023 | 07:40 AM

#14

boostbros

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the est,s work great and have a lot of initial timing and a very hot spark

10-13-2023 | 12:25 PM

#15

pouliotk2441

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I saw in a few threads where people needed to leave the 4 wire plug in place, and wire in the shift interruptor wire to the reference/#3 pin on the module. Is this true?

10-14-2023 | 04:44 AM

#16

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From: On A Dirt Floor

Quote:

Originally Posted by pouliotk2441

I saw in a few threads where people needed to leave the 4 wire plug in place, and wire in the shift interruptor wire to the reference/#3 pin on the module. Is this true?

Bravo’s don’t need shift interrupters….Alpha’s do.

10-15-2023 | 01:37 PM

#17

pouliotk2441

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Quote:

Originally Posted by SB

Bravo’s don’t need shift interrupters….Alpha’s do.

got it. Thank you! We got it running. It’s still acting up, doing the same issue it had before. (Huge thread I posted here a month or so ago). So idk what else it could be aside from a few charging wires.