My 273 build

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76hemi

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So I am building the 273 in my 67 dart GT it's 30 over and has 360 swirl port cop car heads milled spun the bearings and got the crank hot . Have the 30 over 10:5.1 Pistons from egee and thinking about using the 4 inch egle crank. I know guys say it won't be able to breath but I don't see a problem with the 360 heads. That I was already running on it however I am going to put umbrella valves in. Just clearance issues left Maby. And yes it would be nice just to put a 318 or 340 but I want to keep her numbers matching. This car very low original miles had the certicard in excellent condition original radiator hose with the blue stripe still like new . Anyway any advice or opinions. Anyone out there try this. Thanks mopar brother's and sister's
 
So the heads are 308 castings? Hell, I say go for it. That's what hot roddin is all about. Only thing though, I don't believe anyone makes an off the shelf piston so you're probably going to have to go custom. Plenty of companies out there will do it though.
 
RustyRatRod said:
So the heads are 308 castings? Hell, I say go for it. That's what hot roddin is all about. Only thing though, I don't believe anyone makes an off the shelf piston so you're probably going to have to go custom. Plenty of companies out there will do it though.
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Hey thanks your right that is what hot roding is all about. I believe so on the casting they came off a 78 diplomat cop car. And I already have the pistons from. Egee they wher a little more than half the price of the steel foged pistons from RSP. Wich wher 1200 hundred little bit more than I wanted to spend but it would be really to pu dual super chargers on it.
 
76hemi said:
Hey thanks your right that is what hot roding is all about. I believe so on the casting they came off a 78 diplomat cop car. And I already have the pistons from. Egee they wher a little more than half the price of the steel foged pistons from RSP. Wich wher 1200 hundred little bit more than I wanted to spend but it would be really to pu dual super chargers on it.
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SO the pistons have the correct compression height for the 4" crank? 273 pistons will not work on a 4" crank.
 
76hemi said:
So I am building the 273 in my 67 dart GT it's 30 over and has 360 swirl port cop car heads milled spun the bearings and got the crank hot . Have the 30 over 10:5.1 Pistons from egee and thinking about using the 4 inch egle crank. I know guys say it won't be able to breath but I don't see a problem with the 360 heads. That I was already running on it however I am going to put umbrella valves in. Just clearance issues left Maby. And yes it would be nice just to put a 318 or 340 but I want to keep her numbers matching. This car very low original miles had the certicard in excellent condition original radiator hose with the blue stripe still like new . Anyway any advice or opinions. Anyone out there try this. Thanks mopar brother's and sister's
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"thinking about using a 4" Eagle crank" The point the guys were trying to make is that the Egge pistons are for the stock crank. A 4" stroke crank will require different pistons that no one makes. They will need to be custom made.
 
toolmanmike said:
"thinking about using a 4" Eagle crank" The point the guys were trying to make is that the Egge pistons are for the stock crank. A 4" stroke crank will require different pistons that no one makes. They will need to be custom made.
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I think Cadillac? made pistons in or close to a 273's bore with a shorter compression distance? Maybe do some research and the math?
 
A 4" crank in a .030 over 273 block will make a 335 CI motor. Find a 5.9 Magnum block to stroke with the 4" crank and make a 408 CI motor. Save your correct date coded 273 to build back with a new crank later.
 
I'm looking at a 1969 dart and the first thing that will go is that 273, it's a number matching car so I'll keep the 273 but I'm not rebuilding it.
 
toolmanmike said:
"thinking about using a 4" Eagle crank" The point the guys were trying to make is that the Egge pistons are for the stock crank. A 4" stroke crank will require different pistons that no one makes. They will need to ok
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toolmanmike said:
"thinking about using a 4" Eagle crank" The point the guys were trying to make is that the Egge pistons are for the stock crank. A 4" stroke crank will require different pistons that no one makes. They will need to be custom made.
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Ok thanks I appreciate the help what about a 358 crank ?
 
Dan the man said:
I'm looking at a 1969 dart and the first thing that will go is that 273, it's a number matching car so I'll keep the 273 but I'm not rebuilding it.
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Nice I thought about the Same but I can't afford a 340 and my mechanic said not numbers matching unless the moter is in it
 
76hemi said:
Nice I thought about the Same but I can't afford a 340 and my mechanic said not numbers matching unless the moter is in it
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New Mechanic? All Bs aside, if you destroy and window the number is 273 block then you have issues I had a friend of mine had Joe from Joe's Racing Engines down here taking chunk out of a 440 and repair a windowed 426 Hemi... you ain't going to want to do that with that small block it's not going to be cost-effective. What the fellas are trying to tell you is if you're going to build something that brutal use a different core for a block shelf and save your original number matching book and then you can always return the car back to a numbers matching car.... Dig?
 
Hodden pistons might be able to work with 3.58 stroke, when I was looking into doing a 273 they seemed like they could work, some say you can bore to 3.75" and use chevy pistons might have something that might go with 4" stroke.
 
273 said:
Hodden pistons might be able to work with 3.58 stroke, when I was looking into doing a 273 they seemed like they could work, some say you can bore to 3.75" and use chevy pistons might have something that might go with 4" stroke.
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Man, just Double and Triple Check EVERYTHING if You are gonna go Custom Pistons, off the shelf, i would still Have A KNOWN Good Engine Man/ Machine Shop VERIFY ALL Numbers, ie: wrist pin height, comp height, wrist pin size, material of Pistons considered, fly cut/ valve reliefs needed, final bore size needed ( will yer block take it) MAN, just please Do Yourself a Favor Brother, I ain't trying to rain on your parade man just make sure you or someone that knows what they're doing takes everything into consideration before you start spending a dime.... life WILL be Better and Less Stressful! It always takes me a year or two to build a motor. Due to Research and Money. I have time to research... I don't have money to screw things up
 
There are no VIN numbers stamped on a 67 engine. It can be date code correct, and that's it. It's expensive enough already to build a 273 and adding a stroker crank to the equation will only make it worse. I just built a 273 for my 65 Barracuda. Custom forged flat top pistons from Race Tech, for stock stroke 3.31 crank cost $700. Rings cost $200. Race Tech already had a CNC program for the pistons, so they were cheaper because they did. Pistons for a 3.58 or 4.00 crank will be more, and a 3.58 or 4.00 Scat crank with 273/318/340 mains will be probably $1200 plus shipping. Then you get either a 302 or 335 CI motor depending on which crank you choose. I fully support building your motor however you choose and look forward to watching the build thread if you make one, but knowing what I know from recently going down the 273 Rabbit hole...I personally would never build a stroker motor out of one when I could spend less money doing the same thing to a 340 or 360.
 
Ironracer said:
Man, just Double and Triple Check EVERYTHING if You are gonna go Custom Pistons, off the shelf, i would still Have A KNOWN Good Engine Man/ Machine Shop VERIFY ALL Numbers, ie: wrist pin height, comp height, wrist pin size, material of Pistons considered, fly cut/ valve reliefs needed, final bore size needed ( will yer block take it) MAN, just please Do Yourself a Favor Brother, I ain't trying to rain on your parade man just make sure you or someone that knows what they're doing takes everything into consideration before you start spending a dime.... life WILL be Better and Less Stressful! It always takes me a year or two to build a motor. Due to Research and Money. I have time to research... I don't have money to screw things up
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Oh yes I have a pro building the moter. Bumme.. yes it sucks waisting money I built this motor 1 already it spun the main bearings and got the crank hot. It's 30 over already have the new pistons from Egee 10:5.1 comp I was running 360 heads on this moter shaved etc debating instill using them not sure I want to spend the money on fancy aluminum heads would be nice. So just trying to figure out the crank thinking a light weight scat or egle. I have a 318 but I don't want to get it out and I would have to go to dad's house 3 hours away get the truck cherry picker come back. To much work just to steal the crank out of it my mechanic said save it .

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I good question do you know if I can use 358 crank mopar gas one for four hundred something. Where do you live
 
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