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

C4 computer options

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Old Aug 21, 2009 | 11:43 AM
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We live in texas with emissions inspections. If I convert to carb'd on a 1990 I'm assuming I would fail emissions?

We want a car thats not TOO computerized to make it easier to work on as a first project car. If this isn't do-able, whats the cheapest ecu upgrade, and fuel injection upgrade?
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Old Aug 21, 2009 | 01:54 PM
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What do you want to do with it?

You can run an aftermarket ECU, but they're not cheap.
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Old Aug 21, 2009 | 02:26 PM
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Originally Posted by BrianCunningham
What do you want to do with it?

You can run an aftermarket ECU, but they're not cheap.

Figure out what you want to do, tuning a FI car is not hard. Lot's of websites and books to teach you how.
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Old Aug 21, 2009 | 02:44 PM
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What is it your trying to do ?
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Old Aug 21, 2009 | 02:50 PM
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Originally Posted by floridamale
What is it your trying to do ?
Sorry I was tired when I wrote the post. My first choice would be a carb conversion, but only if it will pass emissions, and my second choice is upgrade the fi setup if #1 is not possible
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Old Aug 21, 2009 | 03:04 PM
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Fuel injection is not as complicated as you think. Plus, why would you want to go back 50 years and put a carb in? Do some reading and use this forum. Its amazing what these guys can talk you through.
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Old Aug 21, 2009 | 03:27 PM
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You will not pass if you go to a cab set-up
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Old Aug 21, 2009 | 03:40 PM
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Originally Posted by floridamale
You will not pass if you go to a carb set-up


Carbs aren't very good at emissions lol. They do make power easier and cheaper than FI though
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Old Aug 21, 2009 | 03:47 PM
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Originally Posted by Pwnage1337


Carbs aren't very good at emissions lol. They do make power easier and cheaper than FI though
You could pass emissions but you'd need all the emissions equipment still on the car and working in good order. Lean out the fuel/air ratio and you might just pass.

Aftermarket ECU's are a lot more user friendly than the stock one though and can be adjusted.
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Old Aug 21, 2009 | 04:53 PM
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Not if they have a visual inspection in Texas
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