1973 trans am 455 sd horsepower

252 of them were the Super Duty models. Most people though that was performance for standard Daytona R/T. I had only heard on this website that there were no 4-speed, AC, SD cars built. @ Viking : My friend when some of my friends say that a Daytona or Cobra 427 can do 180-200 mph , can you believe ? To that end, in the ensuing years POR-15 was applied to the chassis to keep rust at bay and a new carpet was installed, though the rest of the black Morrokide interior (code 236) is original. On August 3, 1973, a salesman named Leonard at Ed Hammock Motors in Atlanta, Texas, prepared Car Invoice No. They also only had 7.9 compression ratios, so the times you see in period magazines are not representative of the production cars. The pictured Buccaneer Red 1973 Trans Am equipped with an SD-455 is owned by Larry Navarro. really ??? A forged crankshaft was in the original plans of the 1973 model, however the actual production SD455s were given nodular iron crankshafts along with some minor enhancements. Hi-Performance Cars magazine was able to get their hands on a 1973 Pontiac GTO tester equipped with the Super Duty. 1973 SD-455 Trans Am - A Charmed Life - MotorTrend Great ride! This engine was not going to fly with catalytic converters which GM had to install in all of its 1975 models, to get them certified by the EPA. The local watering hole has become the meet market out by the big box store, with goals and scores and codes to be interpreted. I just crunched some numbers, and my current estimate would be 162 mph with 310 net hp and 172 mph with 371 net hp, assuming gearing was made to reach those velocities. Other times one just comes to them as naturally as waking up in the morning. The Pontiac Trans Am SD-455 was a limited production muscle car built by Pontiac from 1973-1974. I don't know where you get your specs from, but they're wrong, most of the cars you mentioned have close ratio 4 speed manual transmissions and a close gear ratio usually sacrifices top speed in favor of acceleration, And the Mustang King cobra is just an underpowered pretentious piece of crap. $185,000 1-2 Search Tools Refine Search? This generation received a new body style that was more swoopy as opposed to the Coke bottle style of the first-generation Firebirds. The Firebird and Trans Am Super Duty were truly the muscle cars last hurrah. I equate them in performance to MOPAR Hemis. Jan 13, 2014 It's difficult to grasp how an engine can generate enthusiastic buzz more than 40 years after its inception, but mention Pontiac's Super-Duty 455 and some Firebird fanatics get. The Pontiac Firebird was an American automobile built from 1967 to 2002. If anything, it was a shroud to allow 427 cars when faced with a cid edict. Before the early-mid 1970s six cylinder cars almost always required a lot of upgrades to be a V8 car. Bryce, COPO was one of the greatest things to happen to autos in the 60s and even 70s. Lots wrong with this carNOT a 4-speed car from the factory, it was an automatic! Only the Boss 302 LS is unlimited in stock configuration (as far as I know), everyone else with the Coyote 5.0 has to get a tune to eliminate the governor. And then, I assume, quite a few of those owners swapped out the camshaft to a higher performance grind again. . look at my posts in this place : 455/4-Speed: 1973 Pontiac Trans Am | Barn Finds white w/ blue stripe. The more that bird grew, the higher Trans Am sales flew, even as performance declined. they have the tyre tech, its stable, i never understood that, GreenPeace? . The only top speed that i'm pretty sure it's true is 1969 Dodge Charger Daytona R/T Supercharged. What was the only way to get there? Our neighbors late dad told us about how they used to take a wagonload of wheat down to the little village at the train station to sell, and then buy the supplies that they couldnt grow or make or do without. I will look for the YouTube video sometime, my German is still pretty good. I have a 1975 trans am with a 383 striker and the original 400 on the side of my garage. The Trans Am can be seen here on eBay with 2 days remaining and it is already bid to $10,098. LS2 engine option cost less than $600. It is a 1973 Pontiac Firebird Trans Am project car equipped with a 4-speed transmission. Having 30-years racing experience under his belt in everything from Pontiacs to Vipers and Shifter Karts, this soft spoken hospital pharmacist has made many memories with his T/A on the track and cruising the streets of Atlanta, and selling the Pontiac has never even been a consideration. They slipped it into the mix, hoping Uncle would not notice. Your numbers are completely believable, and realistic given the gearing of those four speed manuals. 1974 Pontiac Firebird Trans Am SD-455 4-speed (man. 4) - Automobile-Catalog Net, of course. Cars dont sell on originality or that kind of look anymore. Unfortunately, as the issue had gone to press, Pontiac yanked the Super Duty off the options list for the GTO. 1974 Pontiac Trans Am SD-455 - Old Car Memories There were two engines available in 1973 for the Trans Am. 3. i thought the sd-455 valve cover decal is supposed to be on the DRIVERS side, not passenger side. I own a 1973 Formula 455 with this engine and it is powerful and fun to drive. Only about 4,800 total models were made. RULES: No profanity, politics, or personal attacks. . in this link: http://en.wikipedia.org/wiki/Chrysler_Hemi_engine 2-door Trans Am SD 455 8-cylinder. :). 172 mph for 1969 Charger 500 ???? However, due to cost restrictions to certify the engine for each model, Pontiac made a concession. The odometer on the car is said to read 59,400 miles. Another sign of true SD is the specific PCV valve, which was on driver side rocker cover. And today the Pontiac has yet to be restored but is slightly modified and is raced on a regular basis. That is really the only avenue to performance these days, since the SD-455, like all those "performance . "It's good to know that the very special cars, which we have hung onto from the "bad car times" have found their place in automotive historyand we are still out there driving them today!" 1973 Pontiac Trans Am SD-455 - Muscle Car of the Week Mark said. There's no link to that magazine but since it posted in wikipedia, i think it's a little accurate but not too accurate. For our shindig, Norris' Pontiac was set up thusly: The original XD-code block had been bored to 462 cubes, replacement .030 over TRW forged pistons wrapped in Sealed Power moly rings pumped in the cylinders via the stock crank and forged steel SD rods. And its such a pain to shop, better stock up. I talked to Herb Adams who developed the engine for Pontiac and he said that his team took what they learned from developing their Pontiac 303 cubic inch V8 engine and applied it to make a powerful but streetable Trans Am. The latest news on WordPress.com and the WordPress community. Thx. Accurate throughout and highly detailed, it is ready to show and . In 1978 bad news for the owner provided Mark with the opportunity of a lifetime--the SD had spun a rod bearing and Hagin was looking to get out. All specifications, performance and fuel economy data of Pontiac Firebird Trans Am SD-455 4-speed (216 kW / 294 PS / 290 hp), edition of the year 1974 since September 1973 for North America , including acceleration times 0-60 mph, 0-100 mph, 0-100 km/h, 0-200 km/h, quarter mile time, top speed, mileage and fuel economy, power-to-weight ratio, dimensions, drag coefficient, etc. The 455 HO was stock in 71 and 72. A time when oil embargoes, the Clean Air Act, and cheap economy cars had taken their toll on muscle car sales. Almost all of them are old cars which could be nostalgia but maybe (I like to think) because they just had something new cars dont. So let's just start at the beginning and let the superlatives fall where they may. When I lived in the pre-car neighborhood I was a bit of a regular at the local bar, at least on payday, because I could stumble home at the end of the night instead of fearing a shakedown (or worse) from an AGW. And for awhile, just long enough to get a few into circulation he didnt. We now need a car, instead of wanting a car. He doesnt mention the SBC in the all time best V8s. if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[580,400],'barnfinds_com-large-leaderboard-2','ezslot_4',148,'0','0'])};__ez_fad_position('div-gpt-ad-barnfinds_com-large-leaderboard-2-0'); This one would be fun to terrorize some of the higher-end areas of town in. 179.2 mph would be very cool, if we could trust the YouTube poster being honest that the Mustang was stock (other than having a tune to remove the governor). It became known as the fastest Pontiac ever. But by the time actual production arrived, that probably made no sense. By the time the price, the options, and the tax, license and title were totaled, the purchaser, a Mr. Leslie Hagin paid $5,309.88 for an incredibly rare SD-455 Trans Am. Along with, a compression ratio of 10.25:1, a camshaft, with 041 valve timing, slightly richer carburetor jetting, and as much vacuum advance the engine could tolerate. Too bad that seemed to be impossible due to emissions regulations during that era. Great article! In the wake of lowered compression ratios and other tweaks to accommodate unleaded gas, the Trans Ams standard 400 4-barrel was a respectable piece with 225 net horsepower. Thats OK though because in a few years it will be fat and surly anyway. Type: 3-speed automatic When Ford redesigned the retro looking Mustang in order to improve the aero for the 2010 model year they added a governor to limit the top speed. The engine was initially rated at a very conservative 310 SAE net horsepower which seemed wilty because just a few years prior, horsepower had been measured more optimistically, according to the SAE gross standard. For 1973, Pontiac introduced a version of the 455 cubic-inch V8 called the Super Duty or SD-455. I think it's enough to reach 190+ mph with that if using 3.23 final. Everything was easily interchangeable and (generally) cheap. 1973 Pontiac Trans Am Super Duty SD-455! - Pontiac Firebird Trans Am The owner could countermand the government in a weekend of wrench turning. Infact most people who are genuine car people hardly go and buy a new car anymore. Even Merlin my Persian tomcat loved to ride on the top of the bucket seats and look inscrutable for other travelers. Transmission had issues per seller. I love the scene where Kevin Spaceys wife comes home and asked whose car that is in the driveway. When I was a child our dentists and family doctors practices were run out of the front of their homes, and that was in the 1970s. Just 1,296 1973 and 1974 Firebirds got the SD-455, 101 of them Formulas and the rest Trans Ams. This engine was hand-built with a heavy duty block, forged aluminum flat top pistons, and Rochester 800 cfm four-barrel carburetor. The frames were identical. I miss my old cars, now your gonna make me cry, dammit! Today, these numbers may sound miniscule but in 1973, this was top shelf muscle. Stock Number: 753. 1986 Ford F150 XLT Lariat 4x44 days$1,250Bid Now. At 5150 rpm the stock Coyote 5.0 engine is producing only about 90 percent of peak power, I think. In 1973 and 1974 Pontiac offered the Super Duty 455 engine in the Formula as well as the Trans Am. Curb weight is a stout 3,850 pounds thanks in part to the optional A/C, which adds 110 pounds while race weight is 4,050 pounds and Mark runs 89 octane in the tank. Original Turbo-hydramatic 400 3-speed transmission. On the street, the race meats and wheels give way to Rally IIs and BFGs. Ive had to make due with my 76 but it is Carousel Red, at least and it does have a 455 and Honeycombs! This story has so many possible powerful leads that it made my head swim. It did not meet 1975s so it was killed off for good. At 5000 rpm the rear wheel hp of the Boss was 330.80, the GT was 328.76. But the 89 TA was automatic-only, punch it and go while the 73 TA could be ordered with a beefy four-speed manual that howled and whined like a 707s turbojets spooling up on the take-off run, accompanied by the bellowing roar of the 850 CFM Quadrajet carburetors enormous secondaries opening. My Maverick is one of the exceptions. Not too confident this would hit 175Mph, 70s tech, with a 4-Speed, and that much Bhp, and a CD of about Cd.34? Until this event, almost no one in America cared about their energy consumption. We do not have the time to build it, so we are offering it up for someone to buy and restore themselves. Unfortunately, there are no pictures of the interior of this car but the ad says that the interior is nice and the dash is not cracked. Even Though it Also is. It had real tall gears, also as I recall. A Super Duty 455 cubic inch V8 engine equipped Trans Am tested by Motor Trend ran a 13.8 quarter mile but it was probably a pre-production model. Its not well-known, but the 70s Trans-Am was the best-handling American car. Suddenly, 30-40 cents per gallon looked cheap compared to the 70+ cents it was heading to. The shaker hood scoop could be made functional by popping out the metal block-off plate that was used to help the car pass noise regulations. Not even Knight Rider's bird can compare to the 73 TA. The SD-455s arrival surprised the media and enthusiasts who had been awaiting the demise of performance cars in a catalytic cataclysm of emissions regulations. Before 1973, horsepower dominated and it seemed the Big Three couldnt make enough muscle cars to satisfy the buying public. This really makes me pine for my one of 72 red 73 SD455 X code Transam 4spd that I sold when I retired 11 years ago. By the end of 1973 only 295 Super Duty-powered Firebird models had been built: 252 Trans Ams and 43 Formulas. TFO here, but most limiters dont even kick in at the tamed speed, i know the 2007 XKRs didnt, Unlimited top speed for the 420Bhp models was 180Mph, and most didnt kick in till 173mph..kinda redundant. Or worse, the entertainment center, this time with a different goal of distracting with overstimulation of the senses, not getting to know anyone outside of your existing circle. Engine horsepower and torque curve for Pontiac Firebird Trans Am SD-455 4-speed (man. which book or any Documentary facts .. sorry about this comment Shaggy but this is it . Know, the 2 patrons in the car said it was stock, there were engine and interior pics posted, i dont think they have a reason to lie, i think with enuff room the 5.0 can get to 179, its got the Bhp, and enuff aero, dunno bout gear ratios though, and im fairly confident its had the 3.73. Wyoming was my choice before New Hampshire got the nod from the Free State Project, and they have yet to have half of their commitments fulfilled. Forty years ago, Pontiac bookended the muscle car market with one car that many consider to be a low point of the genre, and another that proudly parks in the upper echelon alongside Hemis, LS6 Chevelles and Boss Mustangs. If this car is restored, it could bring $40,000 to $60,000 so the bidding will probably ended up in the $20,000 range because the car is running. You can be sure that some SD-455 owners did whatever was needed to score a 13-second time slip. The Y Code 455 cubic inch V8 engine was the base motor and was rated at 250 horsepower and 370 lb-ft of torque. Well, Uncle caught on and the party was over almost before it started. IIRC it was a $50 option. Or subscribe without commenting. This happened for a number of synergistic reasons, among them the gradual (and now omnipresent) intrusion of the government into vehicle design, the now dominant influence of women (who birthed the Safety Cult) as well as the increase in traffic and extreme traffic enforcement (including mandatory insurance) which has taken much of the fun out of driving and turned it into an expensive burden. What Makes This 1949 Buick Sacramentos Best Custom of 2023? According to Pontiac's specs, the 455 SD in a 4-speed manual tranny produced 290 horsepower at 4,000 RPM and 395 Lbs/Ft torque at 3,600 RPM. It was a pretty good $195 upgrade, but it probably should have used the Sprint name that was applied to different Ventura trim packages. I believe these & sister tire Grand Prix Radial GT from the late 90s to be the most durable tire ever made. (I even ran out of fuel on the drive. The engine in the 1973 magazine test car was a prototype, likely built under Adams watchful eye. Maybe 79? What is the co-efficient of drag and frontal area of a 1973 Pontiac Firebird? It just goes to show there were still some who were not ready to give up on a true muscle car at the beginning of the Malaise Era. Detailed specs review of 1973 Pontiac Firebird Trans Am 455-4 V8 4 Compression ratio was stock 8.4:1 as were the #16 heads with factory 2.11/1.77 valves. In a time when insurance rates on muscle cars soared and rising gas prices were becoming the norm, the Super Duty was something of an anachronism. Final drive ratio: 3.42 to 1, Steering And the twist is put to the pavement through a 3.42 Safe-T-Track rear (original gears were 3.08s that were changed by the original owner prior to Mark purchasing the SD) and M/T 26x8.5x15 slicks on Rally II wheels. The first is to see if it is serious enough to be dangerous. They both have their advantages and disadvantages, but for sure owning a car was less of a burden and more of a pleasure in the pre-car neighborhood. I called the shop and I was assured that if engine could be saved theirguy could do it. Power is fed to the shift kit enhanced Turbo 400 (code PQ) via a 2,800 stall converter. A deviation was the cam, which was a Ram Air IV replacement featuring 308/320 degrees advertised duration, 230/240 degrees duration at .050 with .520 lift using Ram Air IV 1.65:1 stamped steel rockers. The car is being sold out of the collection owned by the seller. Time to go to the market?

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