Better to gain compression from heads of pistons
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TECH Fanatic
Joined: Mar 2002
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From: Chicago Land
Better to gain compression from heads of pistons I was wondering if its better to mill the heads or use domed pistons. Or are they the same. I am gonna be using 5.3 liter heads so i only need to gain about .3 compression.
6600 rpm clutch dump of death Administrator
Joined: Dec 2001
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From: Texas
Re: Better to gain compression from heads of pistons Better to use a flat or slightly dished piston, and a small combustion chamber rather than a big combustion chamber and a big dome. A big piston dome only slows down the flame front and interferes with the combustion process.
Re: Better to gain compression from heads of pistons If you only want .3 level of compression higher, you can go these options:
1) mill the heads 0.020"
2) +2cc done piston
A +2cc done piston will not slow down the flame travel. Flame travel comes into effect when the dome is fairly large, +10cc or more.
The other thing to keep in mind is price. A set of custom +2cc pistons will cost you $630 and milling the heads will cost about $75. You do the math <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
1) mill the heads 0.020"
2) +2cc done piston
A +2cc done piston will not slow down the flame travel. Flame travel comes into effect when the dome is fairly large, +10cc or more.
The other thing to keep in mind is price. A set of custom +2cc pistons will cost you $630 and milling the heads will cost about $75. You do the math <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Launching!
Joined: Sep 2002
Posts: 297
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From: Clinton Twp. Mi
Re: Better to gain compression from heads of pistons If at all possible, you want to use a flat top piston over the dome. So milling your heads would be the best bet.
Thanks,
Chris Gelineau
Diamond Pistons
877-552-2112 toll free
Thanks,
Chris Gelineau
Diamond Pistons
877-552-2112 toll free
