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Old 04-22-2014, 08:10 PM   #171
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Originally Posted by fordmotorsport View Post

Dependent on the year for the forged crank right?
You should be fine dont you have an 02-03?
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Old 04-22-2014, 09:13 PM   #172
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I remember talking about this a while ago. I think most the newer trucks like 01+ or something had forged cranks. Not sure about the exact date range. So that's no help haha.
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Old 04-22-2014, 09:18 PM   #173
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Can someone explain what the head cc is and how it relates to piston choice and compression ratio. Im guessing its the combustion chamber volume which means the more highly modified heads have less? What is the stock size on an unmodified head?

Edit: looks like the stock 4.6 head is 49.77cc so I wonder if the 5.4 is the same
Yep, it's the size of the combustion chamber in the head. Stock is 42cc as everyone else mentioned. Trick flow has a 38cc head available to tighten up the compression a bit. I'll be doing the 38cc heads and some dished pistons for a 9.2 or 9.3 CR.

Most modified heads a 42cc, it's kinda hard to add more material later on
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Old 04-22-2014, 09:49 PM   #174
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Originally Posted by 4x4dave View Post
Yep, it's the size of the combustion chamber in the head. Stock is 42cc as everyone else mentioned. Trick flow has a 38cc head available to tighten up the compression a bit. I'll be doing the 38cc heads and some dished pistons for a 9.2 or 9.3 CR.

Most modified heads a 42cc, it's kinda hard to add more material later on
I went with the trick flow 195 Race heads with SS valves, bee hive springs, titanium retainers, and 38cc combustion chamber.
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Old 04-22-2014, 09:50 PM   #175
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The forged crank was hit or miss. If you see WF imprinted on the crank its forged.
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Old 04-22-2014, 09:52 PM   #176
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You can also get different size head gaskets. They range from .020 up to .120 in thickness. So you always have room to add or subtract a few decimal points off the CR
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Old 04-22-2014, 10:39 PM   #177
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Originally Posted by ibd2328 View Post
No need for a lightning crank.. Your factory forged is the same.

Don't see any reason for porting heads if you are going N/A and not looking for huge numbers.

I would go with a very slight dished piston -10 or -7 Compression would be great for a NA enginge with a good set of cams.
What do you consider "great compression?"

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Originally Posted by 4x4dave View Post

Yep, it's the size of the combustion chamber in the head. Stock is 42cc as everyone else mentioned. Trick flow has a 38cc head available to tighten up the compression a bit. I'll be doing the 38cc heads and some dished pistons for a 9.2 or 9.3 CR.

Most modified heads a 42cc, it's kinda hard to add more material later on
Thanks for the numbers. I'm pretty sure I'm going NA for now.

Btw is the Navi a 4 or 6 bolt main?
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Old 04-22-2014, 10:44 PM   #178
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THey are all 2 bolt mains with dowels and side bolts.

Unless you buy a longblock
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Old 04-22-2014, 10:44 PM   #179
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10.5 would be good for NA just get a spot on tune.
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Old 04-22-2014, 10:51 PM   #180
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Originally Posted by ibd2328 View Post
THey are all 2 bolt mains with dowels and side bolts.

Unless you buy a longblock
I definitely must have misread something...
And what do you mean by dowels?

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Originally Posted by ibd2328 View Post
10.5 would be good for NA just get a spot on tune.
Ok. That wouldn't be too bad.
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