Cylinderheads: Difference between revisions

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(Created page with '=Cylinder Head= There is a very interesting and thorough [http://www.turbo124.com/forum/viewtopic.php?f=10&t=5772 discussion] by Steve Cecchele at the [http://www.turbo124.com t…')
 
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==Head Gaskets==
==Head Gaskets==


==The well-stocked bestiary==
==Combustion chambers==
Here are a few of the combustion chambers that Fiat tried over the years.  It's not even close to complete, it's just what I happen to have photos and measurements of right now, so if you have more to contribute, please do.  Some reworked chambers would be nice too...
 
===US-spec 1300===
Casting:  128AC0C000040/4 4315419
Width across combustion chamber (not counting cylinder recess):  78mm
 
This one came from a US-spec '74, and has the circular recess that lowered the compression of the US-spec 1300 for emissions reasons.  The combustion chamber doesn't extend all the way to edge of the cylinder bore so the valves are significantly shrouded.
 
http://i499.photobucket.com/albums/rr359/nugatory-nc/741300.jpg
 
===US-spec FI 1500===
Casting:  138AE2A00  4430881
Width across combustion chamber (not counting cylinder recess):  86mm
 
This is a ten-bolt 1500 fuel-injected head.  The exhaust valve is larger and the combustion chamber extends the full width of the cylinder bore so the valves are much less shrouded.
 
http://i499.photobucket.com/albums/rr359/nugatory-nc/cc1500.jpg

Revision as of 05:10, 13 December 2009

Cylinder Head

There is a very interesting and thorough discussion by Steve Cecchele at the turbo124 forum.

Porting

Head Gaskets

Combustion chambers

Here are a few of the combustion chambers that Fiat tried over the years. It's not even close to complete, it's just what I happen to have photos and measurements of right now, so if you have more to contribute, please do. Some reworked chambers would be nice too...

US-spec 1300

Casting: 128AC0C000040/4 4315419 Width across combustion chamber (not counting cylinder recess): 78mm

This one came from a US-spec '74, and has the circular recess that lowered the compression of the US-spec 1300 for emissions reasons. The combustion chamber doesn't extend all the way to edge of the cylinder bore so the valves are significantly shrouded.

741300.jpg

US-spec FI 1500

Casting: 138AE2A00 4430881 Width across combustion chamber (not counting cylinder recess): 86mm

This is a ten-bolt 1500 fuel-injected head. The exhaust valve is larger and the combustion chamber extends the full width of the cylinder bore so the valves are much less shrouded.

cc1500.jpg