This means that it's possible that the same car with a 3.08 rear could make less power than said combo with 4.10s. She offered the car and he bought it. This meant that the cars were made smaller, more compact and fuel efficient as gas had became very scarce at that time. Other bolts that proved elusive ended up coming from original Western cars, with Davidson taking the nicest original bolts, cleaning them, and having them replated. engine sounded downright mean on the dyno and we were looking for some impressive numbers. The advantage of having Jason do the runs however, was his experience. When the third-gen HEMI and the LS go to pasture soon, we'll say it ten times more. Unlike the 1964 model, when the GTO was an option package, in 1970, it was a specific model, and it showed it not only on the outside but also on the drag-strip where it was a fierce contender. All Pontiac GTO 2nd-gen. Coupe versions offered for the year 1972 with complete specs, performance and technical data in the catalogue of cars . The Ford Coyote V8 Crate Engines That You Can Buy in 2022, The 725-HP ProCharged C8 Corvette Is Finally Real, After Almost Two Years, V8 Powered 1967 Chris-Craft Super Sport is Classy in Ways No Modern Speed Boat Is, Funny as Hellcat Dodge Charger EV Mock Ad Says "The Charger is Because You Plug It In", Messerschmitt Bf-108, the V8 Powered Little Brother of the Bf-109. The car was previously auctioned in mid October with a final sales price of $19,699. did it at 4,700. So there is really no way to directly compare our 4 GTO's engines unless the transmissions, rear gears and tire heights are identical. Nonetheless, it's safe to say that this GTO's special-ordered options and build location make it a unique find in the Pontiac hobby. Engine Fuel is fed from a Rochester Quadrajet (code EES7040568, rebuilt by The Carb Doctor in Line Lexington, Pennsylvania) into a Pontiac dual-plane cast-iron intake (code 9799068). After 1974, round-port 455s were no more; the 455 soldiered on through 1976. Supposedly a woman owned it back then. "The most impressive part of the whole show was the fact that the top restorers in the country were coming to my car and could not believe that we restored it in a home garage," he said. It'll never be an E-Type Jaguar in the bends, but we're sure this GTO would take an E-Type to gapplebees in a drag race. "The original interior was near-perfect," Lesiczka recalled. The year 1973 was very well the end of the once great GTO. The standard motor for the $3,267 GTO continued to be the 350hp 400 paired with a floor-shifted three-speed manual. Round-port heads first made their appearance mid-year in 1968 with the Ram Air II, and Pontiac marginally improved them in 1969 and again in 71 with the 455 HO. Different years, I know. This was the least year of The Judge. . As such, the oversquare 455 (unique among the three brands here) in Stage 1 tune featured peak torque at a low rpm2800 in 1970. EQUIPED WITH: 400 CI ENGINE. Because Tom was not on hand to watch, we set a conservative rpm limit of 5,200. In 1976, the 455 was phased out. 7F6 cylinder heads with oversized intake ports and round-shaped exhaust ports were completely rebuilt using bronze valveguides, stainless-steel Ferrea valves in 2.11/1.77-inch,. This directly affected the sales and in 1971, Pontiac GTO sales which had been declining since the late sixties crashed. As is true with all of our strip shootouts we aren't doing this to declare a winner. Heres Everything You Need to Know. Considered the first muscle car, the Pontiac GTO is one of the most famous cars ever produced. The floor-mounted gearshift selector for the automatic transmission featured a wooden panel. Norm warned that his GTO had a slow tach so the pulls were limited to 5,000 rpm, while Jason watched the tach on the computer screen. 15.3 sec. They are often referenced by their last part number digits, ie "066," "067," "068," etc. It involved transforming the upcoming redesigned Tempest (which was set to revert to a conventional front-engine, front transmission, rear-wheel drive configuration) into a "Super Tempest" with the larger 389 in (6.5 L) Pontiac V8 engine from the full-sized Pontiac Catalina and Bonneville in place of the standard 326 in (5.3 L) Tempest V8. As for the engine, the 400 V8 was rated at just 230 bhp while the 455 was rated at 250 bhp (only available with an automatic transmission). What Makes This 1949 Buick Sacramentos Best Custom of 2023? Please follow this link to see a list of all cars nominated for Junes Ride of the Month and to cast your vote. Perhaps Pontiac's performance high point was 1969, when the RA III and RA IV were complemented by the 320-horse 350 HO for the Tempest/LeMans and Firebird, and the 390-horse 428 HO for the all-new Grand Prix and the big Pontiacs. Other runs were close at 293.74 hp and 294.61 hp. Regardless of those facts, each participant should be congratulated for not only having a great GTO but also for letting us flog them on the dyno while they were watching. Power was down slightly because of the change mandated change from unleaded gas to leaded but there was plenty of performance available under the hood. In particular, Pontiac added the Ram Air IVs round-port heads to create the 455 HO. The twin-round. These engines ranged in size from a 400-cubic inch (6.6-liter) V8, or an even more bonkers 455-cubic inch (7.5-liter) V8. Buicks were heavy, loaded with power everything. Both engines produced peak torque at 3200 RPM (on the high side for Buick) but, when Buick added an extra 0.125-inch to the bore for 1970 to create the 455, 510 lb-ft of torque was available at 400 rpm less. For both years, the SD 455 was only available for the two performance Firebird models, though it was planned to be offered on A-bodies too. The front fenders and rear quarter panels were given striking eyebrow contours, sweeping nearly from the nose through the doors and picking up again over the length of the rear panels. Inside, the GTO offered a vinyl interior with bucket seats with wide headrests at the front and a bench in the rear. "For the most part, we just had to clean it up and reinstall it." We can only imagine the factory push-button AM/FM radio still in this car giving a twang-like sound to whatever comes through the speaker no modern hi-fi can match. Anyone up for some bootleggin? This vehicle is truly one of a kind and one of the cleanest, most original GTO's that you will find! It has a displacement of 455 cu in (7.5 L) and a bore of 4.15 in (105.4 mm). Though down almost 30 horsepower from the previous year's 455 Pontiac used in the previous year's GTO Judge, owners of these 1971 Pontiac V8s can and did make up the difference in the aftermarket. This unit produces power and torque figures of 325 bhp (330 PS/242 kW) at 4400 rpm and 617 Nm (455 . The 1965 GTO was announced by Pontiac in a press release on September 13, 1964. While the 455 is a cruiser with locomotive-type low-end torque to work well with a low numeric rear gear, the Ram Air III in Greg's Judge thanks in part to its Ram Air IV cam loves to rev and make full use of its 4.11:1 rear gears. The GTO was assembled in Australia with an LS1, 400 hp American engine, and exported in North America. Power is fed through a 4-speed trans to a 3.55 Safe-T-track rear. '04 GTO 5.7 LS1Our '04 GTO test car would rev freely to its 6,000 rpm redline. But what many people dont know is that in 1970, Pontiac made a historic move and put a 455 cubic inch V8 engine in the GTO, which made it one of the most powerful muscle cars of the era. The 455 HO Pontiac V8 from 1971 was listed from the factory jetting a (probably underrated) 335 gross horsepower and 480 lb-ft (651 Nm) of torque. Though Casentini has passed, the story of his love for this GTO was handed down to the second and third owners, and finally to Lesiczka. Benny Kirk. They also installed a new Cordova top, using hard-to-find NOS material. Additionally, a new SX package for the Cutlass Supreme came standard with the 320-horse 455 two-barrel, then was replaced in February 1970 by the 365-horse 455 (10.25:1 compression) from the big cars; optional was the 365-horse W32 455 (10.50:1 compression) that was identical to the standard engine for the 4-4-2. He then told me that HPP contributor Quint Stires, also deceased, would have to judge my GTO. Enabling new startups in the electric and hybrid vehicle industry, How Much Does The Pontiac Transport Weigh In Tons? The odometer reads 85,077 miles. GTO. The name GTO was given by John DeLorean (who would later leave the company and create the DeLorean Motor Company) after the Italian GTO abbreviation (Gran Turismo Omologato). It was amazing to witness a 34-year-old Pontiac with its sheetmetal still looking like brand-new," he said. Renewed Style In keeping with its tendency toward modest mid-generation restylings, the 1970 GTO featured a number of aesthetic changes over the previous year. Rare Project Pair: Barn Find Jaguar XJ6Cs. Become a member to add images to your comments. The hard top featured thick B-posts at the back and a flat deck behind it. A set of 3.07s in the rear and tall 275/60-15 tires may have held the ultimate power numbers back a bit but we wouldn't know unless we did a gear swap and I doubt Tom would go for that. 582-Inch Big-Block Chevy Puts Down 1,460 HP at 7,400 RPM! The side beltline was descending just to rise again in front of the rear fenders. GM also provided an option for a close-ratio four-speed manual. Our parent company Primedia also has a tech center with a chassis dyno at its Placentia-based editorial offices. Unfortunately, in 1971, GM has switched its advertised engine ratings from gross figures to the more-realistic net numbers. Shows And Awards Inside, Pontiac tried to say to its clients that it was not only a sporty brand but also a luxurious one through the wood grain on the dash. Though General Motors had that pesky edict, Hurst helped bypass this rule by producing 515 examples of the 4-4-2-based Hurst/Olds, all with a 390-horse 455 with 10.50:1 compression. Those round-port heads were key in the development of the 1973 Super Duty 455, which replaced the 455 HO. For reassembly, the team used new weatherstripping, body mounts, door felts, and window seals, sourced from Ames Performance. DUAL QUAD CARBURETORS. It's a 1971 Pontiac GTO, one of the last great muscle cars built before the OPEC crisis of 1973 put an end to the fun and made American cars slower and larger. Thankfully we had no detonation and no breakages for the duration of the test. This was also to be the last year of the GTO as its own separate model. Emissions Jun 12, 2021 For Sale 7 Comments 455 V8 4-Speed: 1970 Pontiac GTO Russ Dixon The GTO was the car that started it all - the muscle car craze of the 1960s. ConclusionSo what did we prove with this test? The consent submitted will only be used for data processing originating from this website. The power was rated at 300 HP, and the SAE gross at 4,800 rpm, with the torque being 400 lbft at 3,600 rpm. First, the owners are not actually performing the runs, which requires a lot of trust on their part since they have no control over what happens to their GTO on the dyno. The computer uses a mathematical equation based on how fast the drum is accelerated to measure horsepower and then mathematically calculates torque. "I'd sure like to know the first owner's thoughts as to why he custom-ordered the GTO in 1969 and what was his reaction was when he took delivery of it.". Davidson has racked up quite a reputation for '68-'72 GTOs, and he was deemed the perfect guy to prepare the Goat for the Pure Stock Drags in Michigan. The 455 H.O. I left many notes on the windshield with my phone number. The rotating assembly also has been balanced. Buyers had the option to choose from four transmissions options that were: The 1971 GTO could be ordered in two different body styles the hardtop and the convertible. Why the all-new 1970 Firebirdintroduced mid-year due to a strikedidnt receive the 455 is another head-scratcher. I once owned a 72 Lemans GT and as Troy s states this one seems more like a LeMans than a GTO. Despite stricter emissions standards, the 455 High Output engine produced 290 horsepower, while the Super Duty, built in 1973, produced only 189 horsepower. This design (versus Pontiac's typical D-port heads) was introduced in April 1968 as the Ram Air II, then was improved for 1969 as the RA IV and continued into 1970. . To power the vehicle, a Tri-power V8 has been bored out to 428cc and is mated to a 4-speed manual transmission. They go from mild to radical with the "068" often suggested as a good solid performance street cam in a 389/400 that doesn't get into street/strip territory. When you think of San Francisco, what comes to mind? Pontiac fans cried for a revival of the GTO ever since the old muscle car was cut down from the production line in 1974. PISTONS: TRW (PN L2359) forged flat . Many builders will tell you not to make this swap into a 400 where the compression ratio was dropped to run on pump gas and they are probably correct. This GTO has the correct late-'69/early-'70 cap. Pontiac GTO Coupe 455-4 V8 Turbo Hydra-Matic (aut. Unfortunately for the seller, the buyer ended up not following through on the purchase, so the car is listed here on eBay with two days remaining in the auction. This GTO has the correct ones with the "NL" foundry markings. That was 1993," Lesiczka said. Where are all of the decals & badges? The men decided on a frame-off restoration with the intent of returning the GTO to how it looked when new. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. As expected, a limited-slip differential was a standard feature for the GTO. This eliminates differences in torque converters and transmission gear ratios but rear gear ratios ranged from 3.07 to 3.46 to 3.55 to 4.11 so there is a variable and the tire heights were different for each model--another variable. Inside, the GTO featured two sport-bucket seats in the front and a bench in the rear. Quarter Mile. A code-1112012 Pontiac distributor (upgraded with an internal Pertronix unit) sends spark through datecoded-correct wires to AC Delco R45S plugs. It was one of the most powerful engines of its time, and was even used in the legendary Pontiac GTO. The legendary, muscle-car styling and powerful engine of the Pontiac GTO made it a classic. Since he was staying with friends Otto and Debbie Tharp, Debbie brought the GTO to the dyno for us to test. Restoration 75 mm MAF, 75mm throttle body, 26 lb-hr injectors, Hyd. Also a friend of Norm's had already chassis dynoed his Tri-Power GTO with pump gas compression and saw 212 hp at the wheels.
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