Contour Enthusiasts Group Archives Forums Modifications Duratec Performance How do I increase my compression ratio?

is this a mod that i can do or do i have to have someone else do it for me? thank you!
smtass4u@aol.com

Hello, I am melissa's husband so don't hold this against her but one way would be to have your heads decked. Make sure if you have over head cams to buy or rent the cam locks so they will stay in time as they are a b*tch to retime. You will gain a few pony's for $20-$30 a head for the mill work and ? for the head gaskets should be a cheap power booster but will take same laber and time. Any machine shop could deck them for you. If I were you why I had the heads and intake of I would port them both for a perfict match to the biggest gaskets you could find. I did this on a 86 svo mustang that was a 4 banger turbo and had a big gain in power. I rejetted the turbo added K&N injecter kit and 3 inch pipe out the rear and I had raced 350 camaros 5.0 stangs a 440 charger and smoked them all!! You should have seen the looks on there faces when I poped the hood!! It was a priceless moment. Good luck Brad. One more thing get the best head gaskets you can or else you will get very good at changing them.

You need to be very carefull with piston to valve clearance.

And the timing chain tensioner can only take up so much slack too.

Another option...

If you have a Non-SVT you could install the SVT pistons.


Another option...

Have material welded (added) into the custion chamber. Of course this means fully custom porting work too...

If you have a Zetec. Check into "Focus" aftermarket pistons and other guides for limits on milling the head


All of them would be labor intensive and some cost intensive...

ok, without going into too much specifics, the simple fact is, that if you have to ask the question that way, means you should do some research on general engine stuff.

Not trying to be a jerk, but if you go to the library, or a good bookstore, get a book on general automotive engine stuff, and learn as much as you can about how an engine works, and what increasing compression ratio actually does, and what other things need to be done to accomodate an increase in compression.

just bolt/weld some metal on to your piston heads.

in all seriousness, do what rara said...