hemi question
Moderator: scottm
hemi question
hey, im just getting into cars and i had a question. am i correct that the hemi's heads are shaped like a half of a ball?....and if i am are the pistons any different from a regular engine?
P.S.- like i said before...im just getting into cars so if i used anything in the wrong context please bear with me
P.S.- like i said before...im just getting into cars so if i used anything in the wrong context please bear with me
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You are basically correct. The combustion chambers are hemispherical or in other words pretty much shaped like half of a sphere. Piston shape depends on compression ratio and can be anything from flat top to hemispherical. The more hemispherical the piston is the bigger the valve relief cuts will be making it look like it has flat surfaces on each side of the top. This is done because the dome on high compression pistons will come very close to the valves when the piston is at the top of its stroke and must be relieved to ensure the valves won't hit the piston when they're open.
Centerline
http://www.hotrodsandhemis.com
http://www.hotrodsandhemis.com
You can see the hemispherical heads in this picture:
Compared with, say, the Ford 289 cylinder head:
When you see them both, you can see the difference.
Compared with, say, the Ford 289 cylinder head:
When you see them both, you can see the difference.
Scott Moseman
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Here is Ford's Boss 429 "Hemi" chamber:
Here's a chamber from the Dodge 5.7L Hemi:
Not the best pictures, but they show the idea.
Here's a chamber from the Dodge 5.7L Hemi:
Not the best pictures, but they show the idea.
Scott Moseman
http://www.TheHEMI.com/
http://www.MoparEVs.com/
http://www.MyAutoMaintenance.com/
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318/340/360 Hemi Head Conversion
http://www.thehemi.com/news.php?id=20030801-1
The projected price, they say, will be $8000.
http://www.thehemi.com/news.php?id=20030801-1
The projected price, they say, will be $8000.
Scott Moseman
http://www.TheHEMI.com/
http://www.MoparEVs.com/
http://www.MyAutoMaintenance.com/
Follow Us:
http://www.TheHEMI.com/
http://www.MoparEVs.com/
http://www.MyAutoMaintenance.com/
Follow Us: