2.5 Piston Mods

**tabme** · 11-16-2019, 08:44 AM

Is there any pistons modifications on a 2.5-200-FF-block that will tweak it a little more during a rebuild. Having rod slots done and mild porting,balancing pistons and rods. Thank you

**Merc 2.5** · 11-16-2019, 03:14 PM

Dont think many mods can b had to 2.5 pistons to increase hp. The 2.0 and 2.4 motors are piston ported and 2.5 is behind liner porting. Pistons for 2.0 and 2.4 can b modded tho.
As far as adding holes in 2.5 piston would just lighten it up. I believe that's the way it works. Maybe someone has done sumthin outside the box idk. Gud luck

**Dave S** · 11-17-2019, 03:06 AM

what m 2.5 .the old ones.... were pron to be ported the 2.5 are behimd so no gainJMO.....

**Chaz** · 11-18-2019, 03:57 PM

Ifin the skirt closes off the mouth to the transfer port as the piston is approaching BDC, chances are pretty good ... that you have some work to do ...