pistons and porting

[El Donkey]

hi guys does anyone know what copression ratio does the 4age pistons have and if i put the same comp

pistons in my 4afe along with a port and polish job can i get the same if more power than a 4age

im not interested in putting in a 4age as its an older engine than my 4afe i was also interested in

a unichip ecu has anyone got one of these and how have you found it.

[T_Money]

hi guys does anyone know what copression ratio does the 4age pistons have and if i put the same comp

pistons in my 4afe along with a port and polish job can i get the same if more power than a 4age

im not interested in putting in a 4age as its an older engine than my 4afe i was also interested in

a unichip ecu has anyone got one of these and how have you found it.

Howdy,

4age - 16 valve had a compression ratio of 9.8:1 from memory.

You can give the piston transplant a go but i doubt you will make the power of a 4age...ge = sport head fe = econcomy head. Although the 4age might be an older engine it is tough as nails and has a greater number of modification options compared to the 4afe.

Cheers

[CHA54]

GE pistons + the combustion chamber in an FE head = very high compression.

GE pistons are available in 9.4:1 with an 18mm pin or 10.3:1 with a 20mm pin, both will put the compresison too high when mated with an FE head.

Why not put in a 20V? They were made up to 2000.

Edited August 28, 2007 by rollamods