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Originally Posted by venom242 Richer jetting is definitely something to consider. I have heard that these motors were so emissions choked by the factory that they purposely jetted them lean, enough to melt pistons (rumor). If had known about that years ago, I might have rejetted my carb instead of doing my 500 swap.
After my carb was rebuilt by a local shop, my 425 ran like a dog. From that point on, I rebuilt all my own carbs. I highly recommend the Quadrajet book by Doug Roe if you want to know more about them. |
The carb on normal 425's are fine.. not leaned out or anything... if the car was equiped for cali. emmissions, then yes, it does have a lean-tuned carb along with other junk...