Hi there you Fulvia guys,
I am embarking on an Aprilia engine rebuild and am advised that Fulvia pistons are a good option.I presume they have an offset "hump" as required to give a sensible compression ratio in a narrow vee engine. The Aprilia normally has flat topped or mildly domed pistons and a c/r of only 5.75:1 (There are rumours of a legendary Tony Smallhorn car that would top 100 mph using an engine with such pistons!)
My research shows the common 1298cc Fulvia engine starts with 77mm pistons but I dont think this would leave enough meat in the S1 Aprilia liner (might be ok for S2?) Hence I am looking for pistons from the earlier smaller engined cars.
The standard Aprilia bore is 72mm and all the blocks I have looked at seem to have been bored to +60 thou allready ie 73.5mm. According to Wim W. early smaller Fulvia engines had bores as follows:
1091cc 72mm (same as Aprilia) 67mmstroke
1216cc 76mm " " "
1231cc 75mm (longer, 69.7 stroke)
and the Greek version 1199cc 74mm
So the question is does anybody have or know of any of these 74, 75 or76mm pistons? New or used provided they are servicable.
