im looking for some information with regards to doing a rebuild on a 2wd cosworth

im doing a full rebuild what i want to know is

where is the best places to buy standard but over size pistons or forged pistons
whats the difference between 2wd abd 4x4 pistons if anything
whats the best make of pistons to use

thanks any information would be appriciated

rob

 

If keeping below 500bhp then use standard MAHLE, these are VERY underated.
I am sure MAHLE 2wd psitons have been deleted, and only the 4wd "type" are offered which basically have a minute difference in wrist pin/gudeon pin offset so eliminating piston slap, they do a 7.9:1 and a 8.0:1 CR in the various oversizes, as it will alter CR MINUTELY not enough to cause any problem.
These are FORGED, and can be obtained from the likes of Matt Lewis 01922 692424.
The main difference apart from a slighht difference in CR between 2/4wd is the offset of the wrist pin due to a lot of 2wd having piston slap, which although harmless was not desired by ford, mine(2wd) sounds like a tractor when cold!!
tabetha

 

thank you for the reply