rickbartlett

as above,standard are they 80mm?

gus

iTrader: (1)

81mm iirc

rickbartlett

cheers gus,i have a spare bottom end for my s2 and im told they are saab pistons,dunno if its true or not. but they arent standard, they have very small valve cut outs and the centre of the piston looks ever so slightly domed up. need to get hold of some digital verniers and measure the bores,i roughly measured it as good as i could with a tape measure and it looks to be around 83mm,obviously that wont b accurate but does look bigger than 81mm

gus

iTrader: (1)

oooo 83 you got me now

think it might be that

confused.com

rickbartlett

i will roughly measure the bores in the other engine thats still in the car tomorow as i took the head off today and see what that size roughly is lol

gus

iTrader: (1)

it was bugging me so been searching

79.96mm

Karlos G

iTrader: (4)

As above.

rickbartlett

really?? will have to get some verniers on my spare engine as im sure they are alot bigger than that!!!!

Karlos G

iTrader: (4)

81.5mm is the largest you can go safely.

sas

The old CVH engine was built in 5 grades of size, if you dig out the Haynes it details them all in there.

gus

iTrader: (1)

i know of a couple of engines going to 86!

thats close imo but they work and never failed