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Re: 273 High Performance package consisted of what??
[Re: Airgrabber]
#167497
12/14/08 02:31 PM
12/14/08 02:31 PM
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Joined: Aug 2007
Posts: 1,509
AZ
Mike P
pro stock
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AZ
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As I recall it ws basically a hoter cam (solid lifter (?),4 barrel and possibly higher compression.
I had a customer years about 10 years ago with one in a Barracuda. The engine was rebuilt and everything fresh. The car ran good for what it was the key being "what it was". ANy way you slice it you have 273 cubic inches and it aint no world beater. I belive it was replace with a used 360 and the customer was much happier.
1957 Plymouth (Hemi, Dual Quads, A833 4 Speed 9 1/4 w 4.10) Sold
1937 Dodge Pickup (Hemi, 6X2 intake, 46RH, Dana 60 w 4.56) Sold
1968 Plymouth Valiant 2dr sedan (354 HEMI, 46RH w/4.30 gears)
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Re: 273 High Performance package consisted of what??
[Re: Mike P]
#167498
12/14/08 02:48 PM
12/14/08 02:48 PM
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Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
HotRodDave
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Kalispell Mt.
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They had a bigger cam (all 273s 67 and older had a solid) a 4bbl carb higher compression and a bigger single exhaust.
To make a lot of power out of one you have to spend some big dollars and some high RPMS. A 340 block would cost more but be a lot more fun and cheaper to make the same power from. A 360 would make more power with an equal build and be a cheaper block than the 340. If you want to stroke it and really make some power than the 340 wins out because it has a slightly bigger bore and smaller main bearings makeing less friction.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 273 High Performance package consisted of what??
[Re: Mike P]
#167499
12/14/08 03:07 PM
12/14/08 03:07 PM
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Joined: Apr 2006
Posts: 334
hickory nc USA
skyhawk61
enthusiast
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enthusiast
Joined: Apr 2006
Posts: 334
hickory nc USA
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The 1965 273 Commando (Plymouth) engine package consisted of a four barrel Carter carburetor, a slightly hotter 248 degree intake/248 degree exhaust/28 degree overlap solid lifter camshaft, 10.5 to 1 compression domed pistons, a dual point distributor, black crackle valve covers, and a chrome oil cap and air filter housing. The package's special single exhaust system consisted of a bigger Y-pipe, a "straight-through" muffler, and a black resonator with a square tip. (The tip was changed to stainless in 1966, and the straight-through muffler was replaced with a reverse-flow in a effort to quiet down the exhaust note, which was quite loud on the 65's. Lots of tickets were given for loud mufflers on '65 Barracudas and Darts. The usual excuse was "But, Officer,it came that way from the factory!" It didn't help. Note that this engine and exhaust was available without the Forumla S suspension package in 1965, on Valiants and Barracudas..it was called the Rallye package and apparently (despite dealer order books to the contrary)could be purchased with a three speed column shifted transmission. I've seen only one (a Valiant Signet two door hardtop) equipped this way. With this engine, you got a "Commando V8" emblem on the front fender of the Valiants and Barracudas, just behind the headlight. Dodge Darts got a "273 Four Barrel" emblem, mounted on the front fender between the wheel housing and the door opening, about 4 inches below the top of the fender line.
Even after all these years, I've never heard an factory exhaust sound quite the same way these did when they first came out in '65. I tried to duplicate it on my own '65 Barracuda many years ago, using what factory parts I could find, but it was "only close"
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Re: 273 High Performance package consisted of what??
[Re: skyhawk61]
#167502
12/15/08 01:19 AM
12/15/08 01:19 AM
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Joined: Feb 2003
Posts: 16,128
Mesa, Arizona
dart4forte
I Live Here
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I Live Here
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Posts: 16,128
Mesa, Arizona
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Quote:
The 1965 273 Commando (Plymouth) engine package consisted of a four barrel Carter carburetor, a slightly hotter 248 degree intake/248 degree exhaust/28 degree overlap solid lifter camshaft, 10.5 to 1 compression domed pistons, a dual point distributor, black crackle valve covers, and a chrome oil cap and air filter housing. The package's special single exhaust system consisted of a bigger Y-pipe, a "straight-through" muffler, and a black resonator with a square tip. (The tip was changed to stainless in 1966, and the straight-through muffler was replaced with a reverse-flow in a effort to quiet down the exhaust note, which was quite loud on the 65's. Lots of tickets were given for loud mufflers on '65 Barracudas and Darts. The usual excuse was "But, Officer,it came that way from the factory!" It didn't help. Note that this engine and exhaust was available without the Forumla S suspension package in 1965, on Valiants and Barracudas..it was called the Rallye package and apparently (despite dealer order books to the contrary)could be purchased with a three speed column shifted transmission. I've seen only one (a Valiant Signet two door hardtop) equipped this way. With this engine, you got a "Commando V8" emblem on the front fender of the Valiants and Barracudas, just behind the headlight. Dodge Darts got a "273 Four Barrel" emblem, mounted on the front fender between the wheel housing and the door opening, about 4 inches below the top of the fender line.
Even after all these years, I've never heard an factory exhaust sound quite the same way these did when they first came out in '65. I tried to duplicate it on my own '65 Barracuda many years ago, using what factory parts I could find, but it was "only close"
And if you take the numbers out of the service manual ie head cc, steel head gasket and how far the piston was out of the hole the actual CR on the 235 hp was 11.5
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Re: 273 High Performance package consisted of what??
[Re: dart4forte]
#167503
12/15/08 01:34 AM
12/15/08 01:34 AM
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Joined: Jan 2003
Posts: 14,610
Not2farfromNashville, TN
Rug_Trucker
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Not2farfromNashville, TN
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IIRC a 273 was quick against the 271HP 289's.
Less gearing than them. What magazine was that did a Chevy Mopar Ford drag test?
Same size carb as the HyperPak slant.
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"NUNQUAM NON PARATUS!"
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Re: 273 High Performance package consisted of what??
[Re: Airgrabber]
#167504
12/15/08 02:50 AM
12/15/08 02:50 AM
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Joined: Feb 2004
Posts: 4,501
Gainesville,FL
goldmember
master
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master
Joined: Feb 2004
Posts: 4,501
Gainesville,FL
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The 273 was fine for the competition of 1964,but don't even think about building one and thinking it would be close to a 360 or larger CID combo. It wouldn't be worth thinking about unless you trying hard to get best mpg in a light car.
Last edited by goldmember; 12/15/08 02:51 AM.
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Re: 273 High Performance package consisted of what??
[Re: goldmember]
#167505
12/15/08 02:58 AM
12/15/08 02:58 AM
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Joined: Feb 2003
Posts: 16,128
Mesa, Arizona
dart4forte
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Quote:
The 273 was fine for the competition of 1964,but don't even think about building one and thinking it would be close to a 360 or larger CID combo. It wouldn't be worth thinking about unless you trying hard to get best mpg in a light car.
Angela Bushmaker, Auburn WA, '65 Valiant, K/SA, Left lane, (0.067) 12.01 12.016 0.006,
Not bad for a 273. She runs consistant 12.0s
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Re: 273 High Performance package consisted of what??
[Re: dart4forte]
#167510
12/15/08 03:27 AM
12/15/08 03:27 AM
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Joined: Feb 2004
Posts: 4,501
Gainesville,FL
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master
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Gainesville,FL
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If you want some real details send me your Visa card and I'll send you a package. If you want it simple take a 273,swap a 360 shortblock,keep everything else the same. Go back to the track,your ET's will fall .3 to .4 and you won't need as much gear to get there. That is simple. Free too!
Last edited by goldmember; 12/15/08 03:28 AM.
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Re: 273 High Performance package consisted of what??
[Re: goldmember]
#167511
12/15/08 03:31 AM
12/15/08 03:31 AM
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Joined: Feb 2003
Posts: 16,128
Mesa, Arizona
dart4forte
I Live Here
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I Live Here
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Posts: 16,128
Mesa, Arizona
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Quote:
If you want some real details send me your Visa card and I'll send you a package. If you want it simple take a 273,swap a 360 shortblock,keep everything else the same. Go back to the track,your ET's will fall .3 to .4 and you won't need as much gear to get there. That is simple. Free too!
What does my VISA have to do with the price of tea in China!!?? You stated that you are running (I assume) a 360. I merely asked what combo you are running such as compression ratio, heads, cam, converter, gears etc.
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Re: 273 High Performance package consisted of what??
[Re: dart4forte]
#167514
12/15/08 03:44 AM
12/15/08 03:44 AM
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Joined: Feb 2004
Posts: 4,501
Gainesville,FL
goldmember
master
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master
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Gainesville,FL
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It's not a problem to run 11's with a 360 with 3.23 gears or 11.50's with 408" with 2.3 gears and a 2 barrel carb,it's just not that most can. You answer by posting others results,what have you done!! Whatever!! Thats what I thought!!
Last edited by goldmember; 12/15/08 03:45 AM.
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Re: 273 High Performance package consisted of what??
[Re: Airgrabber]
#167515
12/15/08 03:45 AM
12/15/08 03:45 AM
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Joined: Feb 2003
Posts: 16,128
Mesa, Arizona
dart4forte
I Live Here
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I Live Here
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Mesa, Arizona
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Quote:
What was included with this package. Is it worth the build or is the 340 family better to build up? 
Depends on what you are building it for.
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