1991fordexploder
Well-Known Member
- Joined
- July 8, 2008
- Messages
- 206
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- City, State
- Sanford, NC
- Year, Model & Trim Level
- 1991 XLT stock
has anyone here ever bored a 4.0L and/or made it a stroker?
i would like to stroke out my 1994 explorer but i cant find a stroker kit anywhere for it. any suggestions?
The 4.3L stroker kit from Tom is the only way to add enough displacement to make a power difference. Any motor that is rebuilt will be bored. This is to create a new finish on the cylinder walls such that the piston rings can be bed in, not to create more power. Some motors have enough room between the cylinder walls to do a substantial bore and add quite a bit of power. But not our motor. Our block was originally a 2.4 L (or something tiny like that). Then engineers at ford overbored it to a 3.0 L and used it for a while. Then overbored it again to make our 4.0 L. So the block is already almost completely maxed out with very little room between the cylinder walls for a significant overbore.
Eeehheeeem
5.0L?
I think it started as a 2.8L, then 2.9L, 3.0L, and finally the 4.0L.
The Morano 4.3L kit is the only stroker kit I have seen. Pricey too from what I remember.