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.:rofl:

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.:thumbsup:

 

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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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.

 

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?

 

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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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?

 

Whats next you would rather have a non plastic intake manifold made up to resist cracking?

Actually I would! :laugh: But they cost too much.

 

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

 

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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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!!

 

yes both those reasons are why virtually all manufactures of v8 engines now use them, and there are of course high performance versions for older stuff and new made using the same plastics.... sort of like aluminum is for most modern cylinder heads....

I wish someone would answer the OP also... instead of telling people "chill" who provide actual correct information

 

Maybe BC you keep posting bad info here and elsewhere about "steel" heads, which first of all is technically incorrect, there are NO "steel" heads they are made of either cast iron or alum, not STEEL, if you think thats the same thing try using a BBQ grill that has either bare steel grids or a version using cast iron grates... that type of info that you put in here is then searchable so when me, you or anyone else on the forum has a problem and sits at home searching for hours on end about "cylinder head problem" half of the search results come up with this stuff you post about "steel heads" which again DONT EXIST so one has to then surf through all this crap in an attempt to actually find some way to fix your problem....
my point and its not any kind of personal attack is that you need to stop posting that misinformation. You didnt' get that point months ago when you did the same thing and i responded about the Adobe car....

 

Does anyone one here have any experience in stroking/building custom engines? If so, what kind of hp/torque could the 4.7 unleash in a stroked application and what could the new displacement be?

*IF* stronger cylinder heads for the 4.7 existed, I was thinking it could be stroked to atleast 5.0L (hopefully more than that), HP in the range of 280-300, and torque in the 350-370 ft/lb range.

please correct me if my estimates are off.

 

This place has done plenty with the lowly 4.7...

http://airram.com

 

Dang thats pretty awesome! For some reason i feel like i came across that "project yellow jacket" several years ago

 

its funny to hear people whine about warped heads. news flash... ANY aluminum head is gonna warp if it overheats. common sense. its not the heads fault you cant take care of everything else. I own an 01 Durango. 4.7l. has 150k miles, and I haven't even had to replace the alternator yet. the only problem I have, is the broken exhaust manifold bolt. which is very common in them. as for them breaking down from granny driving, you also have to take into account their oil changes and tune ups. you cant drive 9k miles with no oil change and expect it to work properly. that's just dumb. and I have heard rumors of a company in Germany stroking it to a 5.5l 300hp engine. but I haven't seen proof. I also own an 08 ram 4.7l as my work truck. all I can say is, ive never been in a truck that can move a 1500lbs pool table up the grapevine at 80mph. that 08 is at 145k miles and all ive replaced is alternator. I think people just don't take care of their truck, and then bash it for breaking down. also, I have never lost to any stock truck except for very few models. like trailblazer ss. I raped a Silverado ss. lighting beat me, and the viper truck, of course beat me. but other than that, turbo diesels have a hard time keeping up. idk, maybe I got lucky with a good drivetrain, but its hard to believe when I own the ram and its been thru far worse, and it pulls on the Durango. not from a launch, but at then end. honestly, I think people are too lazy to try and do anything with the 4.7l simply because there are endless upgrades for 318/360. plus, I still haven't seen anyone have a legitimate reason as to why it cant be stroked, they just say its impossible without trying it. just my opinion. let me know if you get anywhere in the stroker department. im gonna talk to a few shops ad see if they will custom make me a crank, or regrind the old one

 

First post? Check

Bumping an old and useless thread? Check

Street racing? Check

Poor paragraph structure and punctuation? Check

You should go back to lurking nooblet. I'm also pretty sure there's plenty of Durango or Ram forums you could waste your time on rather than this one. Oh, and 300 HP out of a stroked 4.7? You do realize that by the time Chrysler stopped production of the 4.7 that it was producing over 300 HP, right?

 

Stroking an engine has Zip Zero NADA to do with the Heads, or intake manifolds. Its an new CRANKSHAFT with Rods and pistons.
An no, no one ever built a "Stroker" crank (as far as I know) for the 4.7L Probably had to do with clearance issues for the longer throws on the crankshaft and the way the 4/7 uses a bedplate.

 

^what this guy said, in fact the bedplate and block already have clearancing to clear the crank in stock form, so i dont see any way of stroking it with any reasonable gain, there is plenty to gain by using better cams, intake, exhaust, tune, etc... 300+ hp 4.7's are plentyful, just google or look over on the dodgeforum.com or the ram or dakota forums for a ton a performance upgrades, i have an 02 ram that had a 4.7 and i did nearly every upgrade before finally hemi swapping, because the 4.7 can only go so far performance wise with bolt on's