Graphite wrote:Thanks guys - looking forward to getting my baby back on the road
Mick - sorry for being thick here... but what is 'Cc' ?
- and my heads that are being used are JDM heads...
My car is a JDM import to the UK - the STi donor engine is a UK car just to clarify incase I hadn't given all the info.
A few things here (bare with me and ill try not to confuse you):
1. Your original EJ20Y (or X if manual) engine is from a JDM or AUDM legacy (liberty in the case of the audm)
2. The heads on your motor are pretty good, but the JDM Sti impreza heads (especially spec c variants and above) are better
3. Cc = cubic centremetres - in engine terminology it means to measure the combustion chamber to assist in checking quench area and thus overal static compression ratio. Easiest and simplest way is to flip the heads upside down with the valves in place and closed (cam caps and cams removed), fill a syringe with water and measure the total volume of water it takes to fill the chamber until full and level with the surface of the head. This gives you cc in Ml's and you can convert this to cc's.
4. The jdm v7 ej207 had forged pistons, rods and crank. The jdm v8-10 have hyperteutetic pistons but the same forged rods, and a better forged crank. The audm ej207 was only ever a "version 7", and thus had the same forged pistons as jdm ej207. These audm shortblocks are still able to be purchased brand new with forged pistons (which are still version 7 shortblocks but brand new).
with no issues 56,000 miles on the clock... They will skim and clean 'something' LOL can't remember which parts he said to ensure they are flat and to maintain the correct compression ratio. They will fit my quad AVCS heads to this engine.. install new timing belt, tensioner and gaskets, spark plugs and oil filter. Then reinstall in my car...
...
