Pinto Car Club of America

Just found a site with some great info on the 2.8 V6. Check it out and let me know if it is OK.

hppt://www.rangerstation.com/tech_library/2_8L_performance.html

Carolina Boy

Hey CB:

  I have been looking out there, registered and just placed my first post. I will let you know what kind of "reception" I get from the group.

Chris

I know this is old but its the only 2.8 post I could find, This stroker assembly would work with either the 2.8 or 2.9 and If you wanted to you could destroke a 4.0 with the 2.9 crank and the right rods/pistons using the calculators that are here: http://www.kb-silvolite.com/calc.php (http://www.kb-silvolite.com/calc.php) Either way its more v-6 info
You would end up with a 3.5L out of the smaller engines and destroking the 4.0 you would get roughly a 3" stroke 4"bore 3.4L that would make a pinto scream

Block Bored 0.0405-0.0466 to keep .008 to .0019 wall clearance
4L Crank Offset ground .030 Max bearing you can get is .040 so unless you have a brand new crank you are going to lose .010 Cleaning it up ending with a 3.3671 stroke
Rods either 2.9 or 4L
Mopar 4.7L Pistons
Bore (in) 3.700 in.
Bore (mm) 93.980mm
Piston Style Flat top, with no valve reliefs
Piston Material Hypereutectic aluminum
Compression Distance (in) 1.240 in.
Wrist Pin Style Press-fit
Pin Diameter (in) 0.946 in.
Piston Ring Thickness 1.50mm x 1.50mm x 3.00mm

This puts your deck clearance at -0.02045
using .038 Gasket thickness as an estimate
You end up with roughly 9.688:1 compression

If you deck the block to zero deck you get 10.172:1