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Unread 02-28-2013, 12:07 AM   #1
mdrum93
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Wj 4.7L V8 stroker!!!

I know the 4.0L can be stroked out, but is there a particular reason why I cannot find anything on a stroker kit or a thread for stroking out the 4.7L V8? It seems like it would have been done by now if it could be.

If it can be done, what would the new displacement be and what are some numbers this mythical stroked v8 could produce???

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Unread 02-28-2013, 04:41 AM   #2
Gunrunner23
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You would also think that someone would make non aluminum heads.....

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Unread 02-28-2013, 05:10 AM   #3
alfaitalia
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Originally Posted by Gunrunner23 View Post
You would also think that someone would make non aluminum heads.....

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And why not go back to acetylene lamps for lights and cart springs for suspension......only joking.

No need to go back to steel heads.....just make the ally ones correctly in the first place. Just about every other manufacturer in the world has managed it ok!
They seem to last ok for most people....as long as you dont overheat them.
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Unread 02-28-2013, 05:44 AM   #4
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Yes but I've also seen people on here grenade the 4.7 in the winter without overheating. For peace of mind ill take the steel heads. Because obviously it was an issue that they didn't want to correct in all the years, makes, and models the 4.7 was alive.

Im not saying I don't take care of my jeep but there have been several people who its happened to who have claimed they baby their wj. Im also friends on facebook with a local jeep only shop and I see once a month they post a pic of a dropped seat valve. And they are replacing it with a jasper, atk, etc.

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Unread 02-28-2013, 06:49 AM   #5
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Yes but I've also seen people on here grenade the 4.7 in the winter without overheating. For peace of mind ill take the steel heads. Because obviously it was an issue that they didn't want to correct in all the years, makes, and models the 4.7 was alive.

Im not saying I don't take care of my jeep but there have been several people who its happened to who have claimed they baby their wj. Im also friends on facebook with a local jeep only shop and I see once a month they post a pic of a dropped seat valve. And they are replacing it with a jasper, atk, etc.

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I would not mind betting that a high percentage of those have been overheated at some point.
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Unread 02-28-2013, 07:20 AM   #6
Gunrunner23
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I would not mind betting that a high percentage of those have been overheated at some point.
Oh no doubt, also probably not running the correct coolant.

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Unread 02-28-2013, 10:05 AM   #7
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Would it be possible to make cast iron heads using the aluminum heads as a model? Seems like you could take the bare alum head and make a sand mold with it and then pour cast iron into it, and then have them professionally planed and machined/cleaned up to specification

I know it would be a lot more complicated than that, but if you have experience with casting metal from sand molds, would it be worth the effort?
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Unread 02-28-2013, 10:17 AM   #8
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Im sure if u sent the aluminum ones edelbrock and they might be able to make some but it would probably cost a lot.

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Unread 03-01-2013, 11:42 AM   #9
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why would edelbrock or anyone else bother to make a cast iron head? Try to find a single performance engine that runs better with that versus either a factory alum head or an aftermarket company's version, YOU CAN'T..... These Mopar 4.7 heads were clearly a bad design from day one, and the engine rebuilding companies all know this which is why they clearly state in all their ads that they have an improved version with the valve seat issue addressed. Its not like this stuff never happens elsewhere, the early Hemi V8 2005/06 has almost the same exact story. Again its bad initial engineering it seems and nothing to do with the material choice. How do you explain the notorious cracked CAST IRON 4.0 cylinder heads that were found in 2000/01 XJ/TJ vehicles if that material is so great? How many people had a entire motor replaced thanks to coolant in the oil on those?? Whats next you would rather have a non plastic intake manifold made up to resist cracking?
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Unread 03-01-2013, 11:57 AM   #10
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Whats next you would rather have a non plastic intake manifold made up to resist cracking?
Actually I would! But they cost too much.
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Unread 03-01-2013, 11:58 AM   #11
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Quote:
Originally Posted by multmigs
why would edelbrock or anyone else bother to make a cast iron head? Try to find a single performance engine that runs better with that versus either a factory alum head or an aftermarket company's version, YOU CAN'T..... These Mopar 4.7 heads were clearly a bad design from day one, and the engine rebuilding companies all know this which is why they clearly state in all their ads that they have an improved version with the valve seat issue addressed. Its not like this stuff never happens elsewhere, the early Hemi V8 2005/06 has almost the same exact story. Again its bad initial engineering it seems and nothing to do with the material choice. How do you explain the notorious cracked CAST IRON 4.0 cylinder heads that were found in 2000/01 XJ/TJ vehicles if that material is so great? How many people had a entire motor replaced thanks to coolant in the oil on those?? Whats next you would rather have a non plastic intake manifold made up to resist cracking?
They only want a iron head to save the engine if it is to overheat, aluminum heads have a lower melting temp than the iron block. They are not doing it for performance
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Unread 03-01-2013, 12:25 PM   #12
Gunrunner23
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Originally Posted by rcwj04 View Post

They only want a iron head to save the engine if it is to overheat, aluminum heads have a lower melting temp than the iron block. They are not doing it for performance
Yeah I could care less about performance. I know that jeep went with aluminum because of the performance. Doesn't change the fact that it warps when over heated. Steel/cast iron won't do that. Id sacrifice a little performance for peace of mind. But hey maybe that's just me. I mean I know I don't have 2700 dollars laying around for an engine.

Also plastic intake manifolds are cheaper to replace then an engine....... So chill

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Unread 03-01-2013, 12:27 PM   #13
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Unread 03-01-2013, 01:51 PM   #14
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Originally Posted by Gunrunner23 View Post
Yeah I could care less about performance. I know that jeep went with aluminum because of the performance. Doesn't change the fact that it warps when over heated. Steel/cast iron won't do that. Id sacrifice a little performance for peace of mind. But hey maybe that's just me. I mean I know I don't have 2700 dollars laying around for an engine.

Also plastic intake manifolds are cheaper to replace then an engine....... So chill

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I really don't think anyone understands your last statement at all, what kind of intake manifold would not be cheaper to change THAN (SP) an entire engine?
That nonsense disregarded if this is your opinion why do you bother ranting about stuff like this on a thread that is questioning performance, specifically wanting more performance? How bout keeping your non technically correct answers limited to someone asking something in that same area, like how to cheaply fix something....
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Unread 03-01-2013, 02:01 PM   #15
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Why so hostile? But seriously i really like the composite intake manifold because it doesnt conduct as much heat and weighs probably 30 pounds less than a metal version of it.

It may not be as appealing to see plastic on an engine but i like it.

But this thread has gotten way off topic!!
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