Is this worth doin to improve gains with mods iv got? any worthwhile gains and rough costs of gettin this done.

Iv got full exhaust/induction mods, plus iv got kent cams/pullies. Car is a 1.8 focus blacktop.

Thanks

Matt

 

not massive gains as the valves are smaller than 2.0l

 

thats fair enuff. I was jus reading forums and stuff to pass time at work and it said about porting inlet and exhaust valves to improve performance

Matt

 

If you're talking about the blacktop zetec 1.8 2.0 valves are exactly the same size 28/32.Only the chaber geometry is different . So If you put a 1.8 head to a 2.0 bottom it'll result in a 11:1 comrpession ratio.

 

would it make much difference as i have just got a 2.0 focus and what would the gains and plus side of this and down sides of this be

 

Them comp ratios are too high for standards pistons and rods.

 

Not true Not true at all.... the zetec engine 1.8/2.0 internals are quite strong.No problem coping with the increased compression when you change your 2.0 head with 1.8. SO if you're running a 2.0 zetec in focus with full exhaust ,head ported (1.8 to benefit from the high compression) and the cams and pulleys it WILL be a nice and quite powerful daily driver. N/A ALL THE WAY mate!!!!!!!!! No regrets at all! I don't know what are the gains from the increased compression ONLY but I'm sure it'll be around 10hp.