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GraphiteDak
GenIII
 
4/28/2006
20:29:35
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 Subject: Any affordabl 4.7 Aftermarket pistons???
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I need to find some 8.5 or so compression pistons for my other 4.7 engine. KRC sells the Ross ones for $850 holy crap that is expensive! My friend paid under $400 recently for really high end Chevy 350 over bored (383) pistons!
I know there has got to be a source for a much better price on these things. Too many middle men on these parts or people are just charging way too much.
If any one has some good leads for Pistons, replacement rods and a crank, let me know!
This summer I need to buy that stuff to get my 4.7 powered car project going!
p.s. , good luck reading everything. I see them new ads to the right are covering part of the text in my post!!!!
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Obio3
Dodge Dakota
JOIN HERE
4/29/2006
00:54:39
| RE: Any affordabl 4.7 Aftermarket pistons???
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They best fix those adds or there will be no posts anymore. Can't read them
So many problems .... So little time
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GraphiteDak
GenIII
5/01/2006
12:39:43
| RE: Any affordabl 4.7 Aftermarket pistons???
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You are not kidding.
I guess we
will have to just remember
to hit the enter key
after only a few words
to ensure someone can read
the post!
But seriously. I would like pistons
for this motor without paying
$850 which is the price on KRC
My friend just paid under $400
for his high end pistons for
his LT1 350 Z28.
I'd pay between $400 and 500 for
low compression pistons but
$850 is kind of steep when I
need to buy a crank, rods, etc
which seems to also be hard to find!
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novaDAK
Dodge Dakota
JOIN HERE
5/01/2006
14:58:23
| RE: Any affordabl 4.7 Aftermarket pistons???
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You have to remember that those are for a small block chevy, and all parts are going to be cheaper for them. We are driving MOPARS, the company that just recently released the formula for the ATF+4 when its been around for a long time. Parts for a Chrysler always have and always will be a little bit more expensive than Chevys, the 4.7 in particular since it's still a relatively new engine compared to the 318/360 and the chevy 305 and 350.
See what I'm saying?
Good luck w/ the Duster! I had wanted one of those but ended up with my DAK.
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daddio
Dodge Dakota
JOIN HERE
5/01/2006
15:03:15
| RE: Any affordabl 4.7 Aftermarket pistons???
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have you checked pistons for all makes? if you can find a piston with the same dim's you need it wouldn't matter if they're for a Ford, Buick, etc... it's been done before.
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GraphiteDak
GenIII
5/03/2006
13:50:04
| RE: Any affordabl 4.7 Aftermarket pistons???
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As far as I know, the 4.7 is a pretty unique piston dimension and design.
I know the 360 shared the same piston ring set as the Chevy 350 and Ford 302/351
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Chris
Dodge Dakota
JOIN HERE
5/07/2006
10:09:27
| RE: Any affordabl 4.7 Aftermarket pistons???
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Graphite, Check for an overbored 273 piston. If memory serves right the 4.7 is very close to a 273 with .030 overbore. The pin placement may be an issue though. Be prepared to shell some cash too, I gave around $600 for my 10:1 273's Custom forged KB. Better than $800 for prob hyperetuctic though
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GraphiteDak
GenIII
5/07/2006
23:44:58
| RE: Any affordabl 4.7 Aftermarket pistons???
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273, you mean like an old 273 LA Block? I was never familiar with that engine.
Anyway, for one thing, the 287 4.7 OHC V8 would never swap pistons with any other Dodge engine. For one, the valves are laid out differently so the valve reliefs would be wrong. Actually, there are no valve reliefs on the 4.7. And the valve layout is across each other diagonally in the chamber, basically a HEMI design.
Anyway. I dropped of my crank yesterday at a machine shop. Looks probably that they will grind it and use oversized bearings.
I did forget to bring in my rods to be checked. Not sure if they were damaged. Looking at them you can't see any metal removed from them. But you never know.
If the rods turn out to be ok, I may be in business reusing the rods and pistons.
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modain
GenIII
5/08/2006
12:02:54
|  RE: Any affordabl 4.7 Aftermarket pistons???
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Message:
Looking at the combustion chambers of the 4.7 and 5.7 engines I'd say our 4.7 is more of a hemi head than the 5.7 ever hopes to be.
Except for a flat edge at one end of the opening it is truely hemishperical - valves opposite each other with the spark plug in the center. The 5.7's combustion chamber looks like an out of shape hourglass - the valves are correct, but nothing else is "typical" to a hemi head.
I'll see if I can dig up some photos...
I'm very interested in how your engine turns out, GraphiteDak. Makes me think I want to build one up for my truck (time and lots of money permitting).
What's your left foot doing?
=========================================
2002 Graphite QC SLT Plus, 4.7L, NV3500, Superchips 3715, 3.92 LSD, loads o'fun...
2001 Patriot Blue Durango SLT, 4.7L, 45RFE, Superchips 3715, 3.55 Open (for now)
1999 Forest Green Dakota RC Sport, 2.5L, NV1500, 3.55 Open
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Chris
Dodge Dakota
JOIN HERE
5/09/2006
05:06:58
| RE: Any affordabl 4.7 Aftermarket pistons???
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Yea I mean't the LA 273. But I totaly spaced the valve layout of the 4.7 head. Sorry to have thrown you for a wrong turn.
The 273 LA had a Commando line that had forged crank, floating wrist pins, forged piston, 10:1 compression. Was a pretty mean A body street motor in '66. They also did a D-Stock class Dart with a hot Commando with 11.5:1 I think 292dur 545lift solid cam, revised valve size, and a 650 Holly. The press release I found said that the Dart gave the street Hemi Coronet fits in the quarter.
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GraphiteDak
GenIII
5/10/2006
01:26:57
| RE: Any affordabl 4.7 Aftermarket pistons???
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Message:
That 273 sounds like a screamer!
Here's some pix of my engine apart. I have posted them before a while back but anyway...
<img src="http://www.paysonarizona.net/MyProjects/Project_Duster/100_0365.JPG">
This was taken with the heads dirty. But you can still see the plug and valve orientation.
<img src="http://www.paysonarizona.net/MyProjects/Project_Duster/100_0382.JPG">
There's one of the rods. They are H-Beam rods. And check out how the caps are made. They are NOT machined seperate and made to fit. They are cast as a single piece and then SNAPPED into two pieces. That prevents cap walk. And obviously every break is unique, so you can't even swap one rod cap to another cap. It would not match up!
<img src="http://www.paysonarizona.net/MyProjects/Project_Duster/100_0384.JPG">
This is how the parts are at this time. Sitting in the trunk of the Duster!
That's the heads after I cleaned them up a bit (nice to have heads lite enough to hold one in each hand at ease!).
And that heavy chunk of steel there is the bed plate that has all of the main bearing caps in it.
<img src="http://www.paysonarizona.net/MyProjects/Project_Duster/100_0371.JPG">
<img src="http://www.paysonarizona.net/MyProjects/Project_Duster/100_0374.JPG">
Defenitely a little different than the LA engines.
Actually, aside from the 3 piece timing chain, I'd say it's easier to to rebuild.
<b>test</b>, yup html is GONE! Damn!
You got to copy and paste.
Or just copy and paste this url where I have all the tear down pix---> http://www.paysonarizona.net/MyProjects/Project_Duster/Duster_Engine_02_TearDown.htm
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Chris
Dodge Dakota
JOIN HERE
5/14/2006
03:08:23
| RE: Any affordabl 4.7 Aftermarket pistons???
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Looks pretty good so far with only the four rod bearings spun. It's neat to finaly see some pics of the inside of the 4.7 with some miles on it. Wierd though, I've always run Pennzoil (because of the higher zinc content) and have never had an engine look like that. I've religiously changed oil at 3000 miles too though.
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GraphiteDak
GenIII
5/14/2006
18:54:58
| RE: Any affordabl 4.7 Aftermarket pistons???
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The machine shop didn't call me back this week. I forgot to take their number with me while working too so I could not call them :(
So far I don't know if it is going to be fixed, is fixed, etc.
I took my rods and tightened the caps. Then used my slide mocrometer thingie to do a basic check comparison on the rods that had bearings spin and the ones that did not.
I could not find any difference in size or how they look really. I may just get this crank back with the new bearings and put this sucker back together here soon!
I will find out about the crank soon.
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Chris
Dodge Dakota
JOIN HERE
5/16/2006
22:51:36
| RE: Any affordabl 4.7 Aftermarket pistons???
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I know it's cheesy, but you could do the plastigauge deal on the rods/bearings when you get your crank back. It's usually pretty accurate by my experience. Good luck.
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GraphiteDak
GenIII
5/16/2006
23:17:01
| RE: Any affordabl 4.7 Aftermarket pistons???
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Check it out.
The machine shop called me back today. Said the crank was done. Said all it needed was polishing and I am to use STANDARD bearings, no oversized.
I knew it didn't look all that bad. He said it was scratched up, but not eneough to need regrinding and oversized bearings.
That is good news. More chances that my rods are fine.
Oh, KRC actually replied to my question on pistons and rods.
He said they had Billet rods.
For $1300!!!!!
$1300.00 HOLY SHEEP SH*T!!!!
I think it isn't worth it. I think I'll control the boost and run under 400HP and bump it up for a few runs here and there at the track.
It's still going to be as much as the Duster will handle without some major suspension mods.
In fact. I think I'll get it all running N/A and run it that way to see what the engine is capable of at the track before doing the turbo. Maybe even mess around with the intake manifold or make one. All the stuff I can't do to my Dakota as I need it reliable.
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Chris
Dodge Dakota
JOIN HERE
5/18/2006
03:23:07
| RE: Any affordabl 4.7 Aftermarket pistons???
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Message:
Cool, Cool, man. I personally think the bottom end of the 4.7 can handle 350-400 after checking it out. I'd be more worried of the pistons crapping out under boost. $1300 for rods is way out of line, I think the few dealers that produce 4.7 parts are milking it for all it's worth. I'll send a prayer to the Mopar gods for ya and your rods. Keep us posted on progress, you've got my interest peaked now.
P.S. A high school buddy of mine has a Indy 440 Duster that he drags, he had to four link the car for traction, and run a blasphemous 2 speed power glide because of the 727's low first gear. Don't have any recent times but she'll haul serious a$$
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GraphiteDak
GenIII
5/18/2006
23:53:50
| RE: Any affordabl 4.7 Aftermarket pistons???
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"...blasphemous 2 speed power glide "
Now THAT made me laugh!
I can't believe how many times you still see someone running the two speeds!
Yeah. I bet them rods are fine if the crank saved that easily.
I think I'll run it 350 to 400HP on the street. And then take my chances closer to 500HP at the drags.
Some day I'll get brave enough to make me a 4 link for it too. :)
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modain
GenIII
5/19/2006
16:12:49
| RE: Any affordabl 4.7 Aftermarket pistons???
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Message:
Here are some standard size main bearings for you...
eBay auction -> 8026092525
What's your left foot doing?
=========================================
2002 Graphite QC SLT Plus, 4.7L, NV3500, Superchips 3715, 3.92 LSD, loads o'fun...
2001 Patriot Blue Durango SLT, 4.7L, 45RFE, Superchips 3715, 3.55 Open (for now)
1999 Forest Green Dakota RC Sport, 2.5L, NV1500, 3.55 Open
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GraphiteDak
GenIII
5/19/2006
22:29:37
| RE: Any affordabl 4.7 Aftermarket pistons???
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Message:
I think the machine shop was ordering them for me.
I'll find out. I saved that seller as a favorite anyway.
Thanks for the info.
I go to the machine shop tomorrow to drop off some rods. I'll maybe take a picture of the crank.
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ramewe
Dodge Dakota
JOIN HERE
5/21/2006
01:03:34
| RE: Any affordabl 4.7 Aftermarket pistons???
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DONT WASTE YOUR TIME AND OR MONEY !!!!! and you seem to be a smart guy, just dont kill that poor duster with a 4.7
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GraphiteDak
GenIII
5/21/2006
18:27:08
| RE: Any affordabl 4.7 Aftermarket pistons???
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Why would you say that???!!!
Would you rather I have an old car, with an old engine, just like every other old car out at the track or on the street?
I guarentee that once it's done. people will sh*t their pants to see a OHC V8 under that hood. Getting 25+ MPG and good e.t.'s at the same time :p
Anyway. I got the crank and bearings back from the machine shop.
But, the rods are slightly out of round. .002" I believe. So I will get rods in a month or so I hope.
I met a guy (while playing Poker last night) who works at a Dodge Dealership.
he says that when someone may kill an engine, like say mess up one of the heads or soemthing under warranty, that they sometimes swap the entire engine out rather than fix it.
Long story short, he MAY be able to find a set of rods from a 4.7
That would be cool.
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