Titan Engines in Ocala FL remanufactures the 4.0 inline six as a
stroker with 4.6-4.7 liters. I have one going into my 2001 Grand
Cherokee currently without modifications. They say it will run fine
as is and will do better with a variable MAP sensor and 24-lb
injectors in place of the stock 19-lb units. Does anyone here have
any experience with this engine or its modifications?
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C.R. Krieger