Ok well in my new classes this semester im taking engine reconditioning and automatic trans rebuild classes.
in the engine class we may supply our own parts and by the end of two semesters you should have a engine build 100% to spec ready to run, was going to grab an engine for my dads durango seeing as its at 240k miles but they wanted 450$ at the yard for one, while it was only 150$ for my trep. durango's are only in the "premium yard". so we pulled a 3.5 from a 95 and called it gravy.
anyway in the class we literally have everything you could need to machine a engine however you like, the teacher even calls the class "engine machining" not reconditioning. well i would just feel like im missing the potential if i do not "update" this engine as much as i possibly could.
From what ive researched so far the design has been around about 18 years from 93-11, with the end result a 46hp and 44tq increase from its release, with versions 2.7, 3.3, 3.5 and ,4.0
it seems the increases from the 1st gen 3.5 to 2nd gen as many if you likely know is from the heads, with softer springs and wider intake valves, and the differences in the block the pistons are lighter 2nd gen, with heavier rods (i dont know how much that really makes a difference) also i think the pistons have a flat top on 2nd gen and that increases the compression and makes it inteference?, the first semester of the class consists entirely of the heads so ill start with that, widen the valve seats, port, polish intake, throw in the 2nd gen valves/springs, i have the specs from 94, compared to 04, and the valves/guides are exactly the same besides the intake head diameter, intake valve lift is .40 mm more in 2nd gen, i still need a bit more research on that but it seems entirely doable, and that can take up my time while i research the more adventurous idea...
Now someone once told me that the 1st gen could not be modded into a 4.0? i didnt look into it at the time but now i ask why not? i assume its something to do with the oil pan, as i believe the blocks are exact same in 2nd gen except iron not aluminum? many small differences can be handled easily, i noticed the 2nd gen guys having to grind out some on bottom of cylinder for crank clearance, i still need to do much more research on the project but im curious as to why i was told it couldnt be done?
in the engine class we may supply our own parts and by the end of two semesters you should have a engine build 100% to spec ready to run, was going to grab an engine for my dads durango seeing as its at 240k miles but they wanted 450$ at the yard for one, while it was only 150$ for my trep. durango's are only in the "premium yard". so we pulled a 3.5 from a 95 and called it gravy.
anyway in the class we literally have everything you could need to machine a engine however you like, the teacher even calls the class "engine machining" not reconditioning. well i would just feel like im missing the potential if i do not "update" this engine as much as i possibly could.
From what ive researched so far the design has been around about 18 years from 93-11, with the end result a 46hp and 44tq increase from its release, with versions 2.7, 3.3, 3.5 and ,4.0
it seems the increases from the 1st gen 3.5 to 2nd gen as many if you likely know is from the heads, with softer springs and wider intake valves, and the differences in the block the pistons are lighter 2nd gen, with heavier rods (i dont know how much that really makes a difference) also i think the pistons have a flat top on 2nd gen and that increases the compression and makes it inteference?, the first semester of the class consists entirely of the heads so ill start with that, widen the valve seats, port, polish intake, throw in the 2nd gen valves/springs, i have the specs from 94, compared to 04, and the valves/guides are exactly the same besides the intake head diameter, intake valve lift is .40 mm more in 2nd gen, i still need a bit more research on that but it seems entirely doable, and that can take up my time while i research the more adventurous idea...
Now someone once told me that the 1st gen could not be modded into a 4.0? i didnt look into it at the time but now i ask why not? i assume its something to do with the oil pan, as i believe the blocks are exact same in 2nd gen except iron not aluminum? many small differences can be handled easily, i noticed the 2nd gen guys having to grind out some on bottom of cylinder for crank clearance, i still need to do much more research on the project but im curious as to why i was told it couldnt be done?