273 or NOT 273?

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Hey, you guys are all missing the point here . the OP wants a built 273 that puts out max hp and can run the 12's or lower et's .. all you have to do is lighten up the car.. case closed! do you really think the gentleman that runs 10's with his 273 abody mopar hasn't lightened that car up alot ? the rule is>> if it does NOT go fast you lighten it up .

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What makes you think all he can get is 200 hp?

The question is depends how/if the OP goes about it idle-3000 rpm (streetability) could be pretty compromised and is that ok with him or not? If that ain't a huge concern then it's a moot point, next also depends how he goes about it, it can cost more especially piston wise if that's also ok with him then it's really no big deal to build one. If it is an issue then it might/probably be a problem depend how he goes about it.
I honestly don't care much on streetability. I have 4.56 gears with a 27 inch tire. My current 340 doesn't make power until around 3k. I'm not looking to run 10's , just was curious If a hot low 12 second street car was possible. After hearing the adversity , I'm most likely going to just build another 340 ( I have a virgin bore block)
 
I honestly don't care much on streetability. I have 4.56 gears with a 27 inch tire. My current 340 doesn't make power until around 3k. I'm not looking to run 10's , just was curious If a hot low 12 second street car was possible. After hearing the adversity , I'm most likely going to just build another 340 ( I have a virgin bore block)
Smart guy. Although I would like to see someone build a legit 350+ horse 273, It can be done so easily with a larger engine.
 
Smart guy. Although I would like to see someone build a legit 350+ horse 273, It can be done so easily with a larger engine.
Oh , it just might happen , I am talking to my builder this weekend , he will be honest with me. ANYONE can build a 450 hp 340 , but not too often you see a 350 hp 273 ripping gears. That's my thought anyway.
 
I honestly don't care much on streetability. I have 4.56 gears with a 27 inch tire. My current 340 doesn't make power until around 3k. I'm not looking to run 10's , just was curious If a hot low 12 second street car was possible. After hearing the adversity , I'm most likely going to just build another 340 ( I have a virgin bore block)


We must be close to the same age lol.

When I was young the best all around street gear was 4.56’s.

I now have 4.88’s and a 28 inch tire now.

And a 4 speed.

And a tunnel ram.

I am the square peg.
 
We must be close to the same age lol.

When I was young the best all around street gear was 4.56’s.

I now have 4.88’s and a 28 inch tire now.

And a 4 speed.

And a tunnel ram.

I am the square peg.
YES!! I love it. I always was and STILL am the guy who slows the travel group going to car shows , or can't go on the highway because of the steep gears. Always had the fuel cell instead of factory tank , Always had the 4 speed , No heat , yup , every 100 lbs. is roughly a 10th of a second. I guess I still have the same mentality lol.
 
This reminds me of a friend that restored an old race car for the street. Ya, it runs 10.90's and he does drive it 20 miles to town occasionally. He has since built a nice Firebird as a cruiser. The wagon is just a little too much.

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This reminds me of a friend that restored an old race car for the street. Ya, it runs 10.90's and he does drive it 20 miles to town occasionally. He has since built a nice Firebird as a cruiser. The wagon is just a little too much.

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NEVER too much , as long as it has blinkers , lights and it drives , its perfect , although , I can do without the tubbed rear.
 
Hey, you guys are all missing the point here . the OP wants a built 273 that puts out max hp and can run the 12's or lower et's .. all you have to do is lighten up the car.. case closed! do you really think the gentleman that runs 10's with his 273 abody mopar hasn't lightened that car up alot ? the rule is>> if it does NOT go fast you lighten it up .

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YUP , every 100lbs is roughly a 10th off the clock.
 
NEVER too much , as long as it has blinkers , lights and it drives , its perfect , although , I can do without the tubbed rear.
I alway wanted a small block powered Arrow for the street. Old race car of course.

Charlie Arrow 2.jpg
 
I alway wanted a small block powered Arrow for the street. Old race car of course.

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I can remember in real time when people first started doing this. Those little cars were like minifastbacks. Great canvas for a wheel tub. My Chevy friends always used the Vega and my Ford guys were using Mavericks or Comets
 
I honestly don't care much on streetability. I have 4.56 gears with a 27 inch tire. My current 340 doesn't make power until around 3k. I'm not looking to run 10's , just was curious If a hot low 12 second street car was possible. After hearing the adversity , I'm most likely going to just build another 340 ( I have a virgin bore block)
A lot people have displacement bias (for good reason) I wouldn't be surprised if some try to talk you out of building a 340 for a 360 :) and especially 408/416.

Like toolmanmike said be nice to see someone build a badass 273 but it does make more sense building a 340.
 
Oh , it just might happen , I am talking to my builder this weekend , he will be honest with me. ANYONE can build a 450 hp 340 , but not too often you see a 350 hp 273 ripping gears. That's my thought anyway.
Shouldn't be a problem to build a 273 if you have the desire, basically gonna take similar parts to do the job, except valve size, your gonna have to keep it around 1.78-1.92 which means your gonna have to work with one of the factory heads, and building decent cr is a bit of problem with smaller engines but besides that 350 hp should be relatively easy with 360/5.9 heads and 400 hp be a bit more work, some porting probably gonna be needed. Other than that should be pretty straight forward.

If you look at the 473 hp 292 it basically was built similar parts that someone would of built with a larger displacement at that time, mainly ported EQ's.

If you have the desire it should be more than possible, but for most it would make more sense to build a 11's 340.
 
Back when I raced pavement oval track, the chevy guys complained about my 360 so much, I contemplated building a 273, just to prove a point. But we had a minimum idle vacuum rule, and restricted to .420 valve lift. So the 273 just had zero chance. If they would have allowed me more cam, I feel certain I could have still won with the 273, but at 8k-85k plus rpm, rather than the 62-63 hundred I spun the 360
 
Back when I raced pavement oval track, the chevy guys complained about my 360 so much, I contemplated building a 273, just to prove a point. But we had a minimum idle vacuum rule, and restricted to .420 valve lift. So the 273 just had zero chance. If they would have allowed me more cam, I feel certain I could have still won with the 273, but at 8k-85k plus rpm, rather than the 62-63 hundred I spun the 360
My cousin had the same problem with his 340, the Chev guy's cheat so much they thought my cousin had to be doing some crazy cheating, they tore him down all the time, and since they didn't know dodge they questioned every factory machine mark, and when they finally accepted he wasn't cheating they kept adding weight to him. People don't like others that don't follow the herd :)
 
I can remember in real time when people first started doing this. Those little cars were like minifastbacks. Great canvas for a wheel tub. My Chevy friends always used the Vega and my Ford guys were using Mavericks or Comets



How about a Pinto?

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For sure the Pinto was another one...extremely popular. My girlfriend from Beaverville Illinois (Yes it's really a town) had one with a manual trans floor shift. We used to beat the **** out of that little turd. I was at EIU at the time and she was working on her Cosmetology Board exam. I remember driving it to Chicago so she could take her final. I took her to Renaldi's for "Gangster Lobster" and drinks after she passed the final then we hopped in the little blue Pinto and headed back to Beaverville. We barely had enough change for fuel to get home back then.
 
For sure the Pinto was another one...extremely popular. My girlfriend from Beaverville Illinois (Yes it's really a town) had one with a manual trans floor shift. We used to beat the **** out of that little turd. I was at EIU at the time and she was working on her Cosmetology Board exam. I remember driving it to Chicago so she could take her final. I took her to Renaldi's for "Gangster Lobster" and drinks after she passed the final then we hopped in the little blue Pinto and headed back to Beaverville. We barely had enough change for fuel to get home back then.
Pocket change is all you needed. I think they got close to 30 mpg. You could buy one for $2000.

There is a stock 302 Comet sitting in a driveway not far from me. I am almost tempted to stop by and ask about it. Naw, I don't need another car.
 
Pocket change is all you needed. I think they got close to 30 mpg. You could buy one for $2000.

There is a stock 302 Comet sitting in a driveway not far from me. I am almost tempted to stop by and ask about it. Naw, I don't need another car.
It was really good on fuel which is what we needed at the time. I commuted back and forth or she would keep the car and come see me when there was a on campus football game. My buddy Dwayne Donalson had a Comet 302 he inherited from his grandfather. Red with a black vinyl top. That little car would really scoot. I think there was something sporty about the hood but that was 50 years ago! I would love to have one but I'm permanently downsizing! It would be hard to resist if it was a driveway or 2 away. You only live once Mike. What the hell go get that little gem.
 
Shouldn't be a problem to build a 273 if you have the desire, basically gonna take similar parts to do the job, except valve size, your gonna have to keep it around 1.78-1.92 which means your gonna have to work with one of the factory heads, and building decent cr is a bit of problem with smaller engines but besides that 350 hp should be relatively easy with 360/5.9 heads and 400 hp be a bit more work, some porting probably gonna be needed. Other than that should be pretty straight forward.

If you look at the 473 hp 292 it basically was built similar parts that someone would of built with a larger displacement at that time, mainly ported EQ's.

If you have the desire it should be more than possible, but for most it would make more sense to build a 11's 340.
Already have the 11s 340 , want to tackle something new and different.
 
Thought about it but seeing my car is a 67 , it would seem fitting that I build a 273 lol. I guess I'm really the only one who understands but I think it's more the fact that my friend had a 289 mustang, 4 speed car with 12.5/1 revving screamer. The fact that the first number was a 2 and not a 3 was so impressive to me , even though it's basically the same engine. Nor sure if it makes sense lol.
 
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