i have a chance to get a used dart iron block in great shape for 1K, should i run it? since im building a 347 stroker and eventually twin turbos
Dart Iron Block
- Thread starter Shaolin Crane
- Start date
Kumm3
Founding Member
Anything wrong with it? Do you know what combo the previous owner ran, or what might have happened that he is selling it now?
If all checks out, i would definitely grab it. See if he will let a machine shop give it a once over, even a visual inspection by a reputable machinist should give you the answer you need.
If all checks out, i would definitely grab it. See if he will let a machine shop give it a once over, even a visual inspection by a reputable machinist should give you the answer you need.
What are the dimensions now, not before the previous owner had it machined?
Iron Eagle or Sportsman? Both are nice IMO, but the IE is much a better value at that price.
You should be looking for a bore not greater than 4.155" finished.
You might want to consider having the 302 size mains.
Look for broken studs.
Iron Eagle or Sportsman? Both are nice IMO, but the IE is much a better value at that price.
You should be looking for a bore not greater than 4.155" finished.
You might want to consider having the 302 size mains.
Look for broken studs.
as far as i can tell hes a shop because he has new and used blocks, boss dart new and used, and if i buy any block im going to have it inspected or im not going to buy it.
Either sportsman or iron eagle both are good. The IE is the better of the two but is not needed if your asking for more info on it, no offense. The sportsman is good for 1500 hp I believe. They are rated at continuous use, not a 7 8 or 9 second pass. If all is well with it jump on it. Very good foundation, good luck. 
Either sportsman or iron eagle both are good. The IE is the better of the two but is not needed if your asking for more info on it, no offense. The sportsman is good for 1500 hp I believe. They are rated at continuous use, not a 7 8 or 9 second pass. If all is well with it jump on it. Very good foundation, good luck.
good thing the car is for drifting and road racing
Wow, I had no idea the Dart blocks could be bored out so large, I was under the assumption that max was 4.125", but now looking at the specs I see you can get away with a full 4.185".
My only worry is that pistons in those bore sizes would be expensive, but 1000$ is killer for a Dart block, so what you'd save there you could probably still be under budget with some expensive oversize pistons.
4.185" bore is Dart's suggested maximum bore.
There are many people taking them out past that with success.
My World Man o' War block will go to 4.200".
4.155" piston is actually one of the most common bore size, and there are many, many, many compression height, ring options, pin options for these pistons.
These pistons can be had for far less than 1000.00. Of course they will be OTS type, such as Probe, JE, Wiseco, Ross, Mahle, etc....
The only reason I said 4.155" max bore "finished" with an 8.2" deck block is, that would be the largest "cookie cutter" 347ci sbf.
Are head gasket sealing concerns an issue at that bore size (4.200")? I've always been curious.
If bore spacing is 4.38", that means you've only got .180" between holes. Doesn't seem like much.
Well, I'm no engineer... I don't want to lie to you, but IMO and experience, the larger the bore, the closer to the clamping force you become.
Now, most "good" to "best" cylinder heads have thick, thick decks which provides very good rigidity. That helps too.
I direct you to those who bore "Mexican" blocks to 4.060". Some Hardblock to control ring sealing... good to go!
To be sure, I would sonic check before going to max bore.
I'm not sure on the depth "saimese" bores are solid to... but that will make a difference over an OE block.
In this situation, I would be more interested in ring sealing over temperature increase.
To the OP... if you're now thinking of going to 408 or larger, the 9.5" deck should be considered.
he says it has a 1000 miles and it looks to be so too, bore is 4.030 and deck hight is 8.2 and the block just went through a fresh machine, any chance the block is stolen and if so are there numbers to verify so, i was only saying that because i didnt know they deck height, now that i do and that its had a fresh machine to 4.030 then i'll keep my stroker kit cause that will also save me machine costs as well
Dirty!?!? Why I oughtta 
Nice find. If I found a deal like that on an Iron Eagle, I'd ****** it up. You probably saved yourself about $1600-2000 between the new cost of the block and machining.
Nice find. If I found a deal like that on an Iron Eagle, I'd ****** it up. You probably saved yourself about $1600-2000 between the new cost of the block and machining.
yeah it was a deal especially cause all the machine work was done, now i just gotta get some more time to install my Probe dominator 347 stroker kit and finish the rest of the damn thing
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