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I'm running the Thunder AVS 800 cfm with electric choke, regular Performer dual plane intake and I'm USING the the Chrysler throttle adapter. I did not install this myself so I guess I should check the adapter to make sure it is attached/connected properly....I'm fairly certain it IS but a couple of replies I've gotten have asked if I'm using the Chrysler adapter.



Ok, I'm running the 800 on my 408 that I just dynoed back in may. It took 2 stages LEAN on the primary side to get it close and on the last 440 I worked on with an 800, which was not entirely stock, iirc we had to lean it 1 step on the primary to get it working correctly. I still think you are to rich. I'll take it you have the orange step up spring in there since the engine is stock??