Pinto Piston Size

[dalmarshall]

I'm interested in a pinto for sale

The guy who has it bought it as it is and says he has seen it with the head off and the piston is stamped +125.

Does this make it 2.1?

Its a '20' block which i believe is either cortina or rs2000 but obviously not a 205 block

Can anyone tell me what size overbore this would be to take this piston size, Cheers

And is it ok for this type of block?

[Vista]

Standard pinto bore is 90.82mm

 

With the standard stroke of 76.95mm you get the following capacities

 

92mm bore = 2046 cc

93mm bore = 2091 cc

94mm bore = 2136 cc

 

+125 refers to an oversize of + 0.125" = 3.175mm so 93.995mm bore.

 

94mm is stretching the limits of a standard 2.0 block and once it's worn it's scrap as it can't go out any further.

[Fiesta Steve]

I have seen a 20 block go safely to 84mm, probably most reliable as a fast road engine rather than a full race engine though..

[w p e]

that should read 1.25mm o/s whitch brings it to roughly 2046cc. standard is 90.80mm. 202 block late transit. 20 block std 2ltr of all kinds