Cylinderheads: Difference between revisions
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 | ==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 00:10, 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.
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.
