I'm building up the A10 and the last set of barrels had +60" pistons and a oversize bore that meant a lot of oil burning and pressure (rebore shop did it wrong - "sorry mate"). Due to lack of funds I was resigned to using them again until I could afford to get them relined.
Anyway, searching for all my A10 bits in the garage (has been in bits for 10 years) I found a really nice set of barrels I'd forgotten I had (I really can't remember getting them), and not only was it a nice find, I'd had them epoxy coated black and they were a tight +20" oversize, with two pistons inside! Yay!
The pistons are different makes though - one is quite a rough casting inside compared to the other one which has AE inside it. They are though both High comp pistons, and had been used in the past as a pair as they have L and R and direction arrows scraped inside them. Thing is, I weighed them on the wife's lovely new kitchen scales and one has a weight of 258g and the rougher one is 272g - 14g difference! I'v tidied up the rougher inside on a bit with the dremel and it is now 271g, but is that enough?
So do I:
- Spend ages with a dremel lightening it (11g is 2cm^3 of ally!)
- Buy new pistons that I really can't afford (and I've just ordered new rings for these pistons only yesterday....)
- Just fit them and forget that I weighed them in the first place
Any other choices?
Anyone got a good nick second hand +20" HC piston of mass 258g or 271g? (includes rings)
I'm tending towards grind and fit......