I was using a jet stage 1 chip with my caprice replacment motor and I always got spark knock and it wouldn't pull past 4 grand. Today i releized i still had the chip in from my origonal engine and i pulled the jet one out and went with stock now it doesn't knock and pulls all the way to 5 grand. Has any one else had any proplems with Jet. I posted this previously not to sell it but to see if any one knew why the chip made my engine do this.

thanks
blake

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89 T/A GTA 350 TPI free mods and all stock
15.21 @ 89.7

 

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