Hi everybody just acquired a set of Pistons for a 1700 v4 on the box it says original bore is 90 mm plus 0.75 mm does this sound correct any info would be appreciated. The Pistons are with rings and are NOS made by hepolite thanks
So the standard bore is 90mm, but to account for manufacturing tolerances pistons are made in a range of sizes and matched to the bore of the engine. This also gives allowances for reboring.
+0.75 sounds like a bit much for a production tolerance, so these are probably a set for a rebore. Sounds like a good opportunity for some engine fettling.
Are these HC or LC pistons? Been looking for a set of HC pistons and rods for Dusty to go with my 1700 crank. Thinking Pinto pistons would do nicely, possibly with a stage 2 works overbore to 1815cc.