C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Mystery part

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Old Dec 12, 2022 | 10:48 AM
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Default Mystery part

What is this part that bolts on to the right side of the blower motor.
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Old Dec 12, 2022 | 12:05 PM
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Thankfully, year is posted in another topic.

Mystery. Is over.
(85) ESC. Spark control module.
Should be. PN: 16022621
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Old Dec 12, 2022 | 01:21 PM
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Why are these so hard to find new. Nothing on Rockauto.
Here is a question about the ESC. If I went carbureted and did away with the injection and ECU computer. Would I still need this ESC for the car to run and does it work with the module in the distributor.
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Old Dec 12, 2022 | 02:55 PM
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It is not needed. It signals the ECU when a knock is detected. You could actually keep it with the carb and connect it to a LED.
It is a short video where I knock on the exhaust with some metal.

https://www.joby.se/corvette/mods/20...ock_indicator/
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Old Dec 12, 2022 | 09:11 PM
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Default Ecu

The name implies it controls the spark. So if a knock is detected can it advance and retard the timing?
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Old Dec 13, 2022 | 01:09 PM
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Originally Posted by johnfin
The name implies it controls the spark. So if a knock is detected can it advance and retard the timing?
It signals the ECU to retard timing.
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