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Old 06-08-2023, 08:07 PM   #3
FASTFATBOY
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Drives: 2013 ZL1
Join Date: Nov 2018
Location: Mobile Al
Posts: 525
Mine makes 600 wheel with a stick shift and the stock pump has no issues.

2.4 pulley
Ported throttle body
No cats
Intake
ID 1000 injectors.


Sounds to me like you need injectors, not a pump. Stock injectors are done at about 540 wheel. If your tuner does not know that you need a new tuner.
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