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

Progression Ignition L98

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Old Sep 14, 2024 | 08:29 AM
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Red Oz RHD C4's Avatar
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Default Progression Ignition L98

Is anyone out there using Progression Ignition?

In a darkish side application, can anybody suggest initial and full advance numbers to begin from on an otherwise stock L98 (with or without the TPI wink, wink)?
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Old Sep 14, 2024 | 10:25 AM
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2023 C3 of the Year Finalist - Modified
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I use progression ignition on my c3 sbc. It’s a fantastic distributor. Huge fan.
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Old Sep 15, 2024 | 12:45 AM
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Great to hear!

Things I like on it;
  • Auto initial setup
  • no more fumbling under hood to adjust timing
  • tune while running
  • tune at each rpm point
  • tidy install - no boxes/wires, etc
  • security lockout feature
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Old Sep 15, 2024 | 12:48 AM
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I'm going a little darkside, to avoid virtually zero TPI/ECM support available in Australia in the current day.

Now.....

The carb I had laying around is a "6 dyno hours only" Demon 850 Blow Through that I got cheap last year....
The Aeromotive Fuel Pressure Reg happens to have a nipple for intake pressure, to raise fuel pressure inline with boost....
Then the Progression ignition has a Boost Retard function....
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Old Sep 15, 2024 | 12:50 AM
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Then,

I accidentally stumbled across a cheap Paxton kit for $2k, only 1500 miles away in Perth, Western Australia.......



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Old Sep 15, 2024 | 12:52 AM
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And THAT is how a suspect cold start injector turned to me "accidentally" supercharging my C4 Vette.
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