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I mean 7 tenths. 3.9 V6 in a Dakota. Same exact specs, cam, heads, intake everything except the shortblocks. The first one was not honed with a plate. The second one was and it picked up 7 tenths and became incredibly consistent where before it wasn't. YMMV



There had to be other things. I can't believe that a simple torque plate hone would result in ~3/4 of a second gain.
Something else had to be off in the first shortblock.



It's possible but with a stocker every little thing helps, and this is a small engine. The truck could hardly run the index before, now it's consistently under and deadly consistent as well.

Made me a believer.

"Follow me the wise man said, but he walked behind"


'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.