Got some calibra turbo parts avalible so would like to use that so can use those pistons
The calibra turbo pistons work better in the zetec turbo engine as the compression would be far to low if they were fitted to the zvh engine what you need is the c20xe pistons fitted to the red top astra gte, they are available for around the £160 figure for a set of 4 .
Also i have a tendency to go for 150mm long m10 caphead bolts (rated 12.9)rather than non stretch cvh ones its just that you dont get that much engagement if you use the shorter cvh bolts and could strip the threads out of the block when torquing them down.
for more info on building you own go to jim hernes site.......................
http://www.quantums.info/zvh.htm
hes a top boy
