425 olds engine horsepower The standard 1965-1967 425 cu in (7. 455 OLDS TO Short-Block Olds big-blocks have only two-bolt main-bearing caps. torque, and 10. 5:1 factory compression. Cammed hot but easily driven daily Mon-Fri 9am - 5pm. A 350 or 455 is a much better choice. Harmonic Balancer-to-Crankshaft Bolt 130 ft. Choose Speedway Motors for the highest quality 425 Oldsmobile performance parts online. 25:1 at 360 hp (270 kW) were available in the U. The 455 offered between 310 and 400 hp, but it was the 500 lb-ft of torque that The Olds 455 engine was created out of the 425 engine in 1968 by changing the internal workings. Cylinder Jun 23, 2015 · Rob's engine, like some (but not all) 1968-and-earlier Olds engines, was machined for huge 0. A classic Oldsmobile 455 engine for sale would be the ideal replacement for your big-block Rocket 455. Which is great, but the flywheel bolt pattern is different compared to the later 68'-90' Olds. 00-in. 4 mm) diameter lifters of the first-generation Oldsmobile engines rather than the standard . While the entire mid-size line at Oldsmobile did not change a great deal, the 442 matured into the formula that would define mid-size muscle – a V-8 with at least 400 CID in a short wheelbase chassis – and under 3800 lbs. 301 Moved Permanently. Cylinder Sep 24, 2018 · During the 1965-’66 model years, Oldsmobile installed the division’s new 425 cu. Factory ratings were 365-385 HP for 4bbl motors. 330 were made 1964-67 and were respectable little engines, capable of impressive output. While sales were limited during the previous introductory year of the 442, they skyrocketed in 1965. By 1968, all Olds engines were using a 39 degree CBA and corresponding 0. General Information. 040 overbore. stroker kit for 425-455 Oldsmobile V8. See 425 on 1966 Oldsmobile Dynamic 88 Holiday 2dr coup. Many had a 45 deg angle - later Olds motors had a 39 deg angle. I believe it is a 425 365 HP engine it has the red air cleaner but an auction house is trying FYI say it's the Sep 11, 2020 · In 1967, the Delmont 88 came standard with a 330 CI V8 engine but the seller references this Oldsmobile as possessing the optional “Super Rocket” 425 CI V8, which is probably the 310 HP version. A new 400 CID V8 replaced the previous year’s 330 CID engine. 6-250: 1 Barrel: 3. ENGINE. Changing to an Edelbrock Performer and take your pick of carburetors, horsepower gain= zero to one horsepower. Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Oldsmobile Ninety-Eight Luxury Sedan Super Rocket 360 hp Turbo Hydra-Matic in 1965 the model with 4-door sedan body and V-8 6964 cm3 / 425 cui, 268. With muscle car fever in full swing, there were many different compression ratios, valve arrangements and carburetion Submit corrections and additions to this information to The Olds FAQ Compiler. If running both a windeqe trav and main-cap straps. I just want a 425 oldsmobile engine. Mar 18, 2018 · The 1964-67 Olds motors use a different crank flange bolt pattern than do the 1968-up motors, so flywheel needs to match. Why? Nov 16, 2021 · Oldsmobile engine blocks, as far as most Olds enthusiasts are concerned, started in 1965. Specifications: Engine: 425. We offer a full machine shop, in house engine dyno, and parts supplier serving the local Wisconsin area and worldwide. This kit includes a cast-iron crankshaft, rod bearings, drilled main bearings, forged rods, forged pistons, moly rings, harmonic dampner with bolt, flexplate with ARP bolts, freeze plug kit, and gasket set. 0 L. Three trim levels were now offered in the Delta 88 line – a base level, then Custom, and finally the Royale level at the high end. somewhat easy enough. To make the rods even stronger, they are shot peened which also increases fatigue life. 400, 403, 425, 455 Cid. a Oldsmobile 400 Modifed Crate Engine - 425 hp a Oldsmobile 455 Modified Crate Engine - 475 hp . Facing the front of the engine, at the top surface of the timing chain area, to the left of the oil fill tube, there is a code about 1. 3) in 1967, the model with 2-door convertible body and V-8 6964 cm3 / 425 cui, 223. I bought the car from the original owner's family, and the title is clean and in my name. Big Block Identification. Eddies Performance Crate Engines - The Best Prices and The Best Parts Mar 3, 2023 · I don't care specifically on what model it came from. Cylinder Apr 25, 2024 · This is one of them and we’re talking Buick, Olds and Cadillac. Most had 10. 990” BBC for example. big block . 5 kW / 375 hp / 380 PS ( SAE gross ), torque: 637 Nm / 470 lb-ft, more data: 1966 Oldsmobile Starfire Coupe (man. Intake Manifold Bolts (Cast iron intake) 35 ft. 8-425 2 Bar carb 6. Since Olds likely expected to sell many more 455s than 400s, redesigning the 400 to use the 455 crank and rods probably made a lot of financial sense. If its Oldsmobile powered, we want to know about it, and make it go faster! OldsPower. V-8 engine. Jan 1, 2023 · The 400 and 425 big-blocks followed in 1965. 425 HC. 3) Horsepower/Torque Curve Aug 21, 2007 · General Motors 432ci Oldsmobile presented by Popular Hot Rodding. The high performance BB exhaust manifolds won't fit the 330 due to deck height. If i wanted mileage (awesome highway cruiser) then it'd be the Olds 350 diesel then the V8-6-4, tho they were about even with the 307/200R4 Oct 21, 2021 · As for the tall-deck 425/455 family, while the 1965-’67 425 engine’s 4. The Oldsmobile V-8 engine still thrives in the serious driver community. My 67 425 with 455 hp is a BEAST! I'll Nov 20, 2017 · One other note on the early engines 425/330(and the 'good' early 'big bore' 400) cranks are steel. Sep 24, 2018 · Its standard 425 engine is supported by the extra-cost Muncie four-speed and an Anti-Spin rear axle. Mar 25, 2004 · But it has outstanding potential for a performance engine. 975". 000" bore E block], or a 425 [with a 4. “The ‘inside track’ on Olds’ hottest number… 442” 1965 Oldsmobile 442 sales pamphlet. 5cc for the T/S pistons and 7cc for the lesser-car pistons. mill the tops of the stock caps 0. Therefore it is a large bore, short stroke engine with a decent rod ratio. Check the item description to confirm this fits your vehicle. 1965-67 V8-330, 425 - machined pad at front of right cyl head. 5 kW / 365 PS / 360 hp (SAE gross) offered since September 1964 for North America . 5:1 compression, it was rated for 370 hp in ’65; fine adjustments bumped it to 375 hp in ’66. Mar 3, 2016 · The original 322 CID, 172 hp V8 that arrived in 1953 set the pattern for all the Buick Nailhead V8 engines to follow through 1966. works with gm or oldsmobile alternator. Note this doc may contain errors. Amazon, the Amazon logo, AmazonSupply, and the All specifications, performance and fuel economy data of Oldsmobile Delmont 88 425 Convertible Starfire Rocket V-8 375 hp (279. 625" exhaust. fits engines with 5. If you are changing the cam, be sure you get the one that matches the lifter bank angle. was 10. 030: 3. 060", which cc'd out to 4. GMC pickups in the 1950's used Olds and Pontiac engines stock because Chevy just had small V8's or even only 6's earlier Feb 15, 2003 · 1967 Oldsmobile Engine Specifications ('66, '68 and '69 specs are also included, for comparison purposes) Mar 31, 2011 · 425s all have forged cranks. The engine-block designs remained virtually unchanged right up to the last Olds engine […] Nov 17, 2022 · This engine was the biggest offering of a trio of engines (400, 425, and 455) that shared a similar architecture. The BoxWrench Engine Specs Database is a community resource for mechanics of Generation Two Oldsmobile V8. i. 00 as well as Yes your engine is a 66 425ci. Jan 1, 2009 · There are Olds engine-builders like Dave Smith Engineering (Exeter, California) and Ross Racing Engines (Niles, Ohio) who specialize in stock and performance engines, and they can trick out your 1959-75 Oldsmobile engine torque value charts give you the correct bolt tightening requirements to prevent damage. 4 mm). Compression ratios of 9. The seller claims, “Engine runs great Transmission shifts smooth”. I say that if you dont own a car or an engine,this is a great place to start. The 7-inch 425 rod is cool, too, you can float the pin end from 0. 980” to 0. 0" rods, as I recall. V8-350: 2 Barrel: 4. Olds specific engine gurus claim a 15-25 hp gain by grinding the bumps away. They sure seemed harder than normal cast iron. 5 kW / 360 hp / 365 PS ( SAE gross ), torque: 637 Nm / 470 lb-ft, more data: 1965 Oldsmobile Ninety-Eight Luxury Sedan Super Rocket 360 hp Turbo Hydra-Matic (aut. gasoline (petrol) engine with displacement: 6964 cm3 / 425 cui, advertised power: 268. $305 Off. 072" intake valves, 1. May 31, 2006 · I don't care for Chevy engines tho. May 4, 2014 · The 425 is one of the better Olds engines, being a 1966 it has one of the few really good Olds head castings, should be the "B" casting, and Toronado's and 442's got the big 2. Jun 15, 2017 · In 1965, the 330-cid Oldsmobile V-8 was bored and stroked to create another brand new engine – the “high deck” 425. ) 120 ft. In 1966 the hot 4-4-2 L69 400-inch option came with 3x2 carburetion, fresh-air induction, and a hot hydraulic cam. Baseline A. And any 425 Olds will have a th400 bolted to the back of it too. There's no replacement for displacement. Rocket Racing & Performance is a custom engine building facility that specializes in Oldsmobile Performance. works with factory ps brackets 425 Oldsmobile 7. Camshaft Sprocket Bolt 65 ft. 1967 Oldsmobile Eighty-Eight Holiday Sedan Additional Info: For sale is my 1967 Oldsmobile Delmont 88 Holiday Sedan (four door hardtop). d. 53: 250: 8. As for supercharging you need to look to a different engine assembly. NOP offers many new and modern internal engine parts like Mahle Motorsports Forged pistons for 350, 400E and 425 Olds. Rated at 375-385 hp, 480 ft. Specifications listing with the performance factory data May 28, 2002 · In my opinion the 425" is one of the best Olds engines for high performance applications. Engine horsepower and torque curve for Oldsmobile Delmont 88 425 Convertible Super Rocket V-8 300 hp (man. 25 or 10. i ran a 68 385 hp one in a 75 gutlass some years back. 155 H. Displacement. To eek out more HP you can go with higher compression, which will prevent pump gas usage (highest stock 455 comp. 5:1 even in W30 package cars, and camshafts would slide back to the streetable side of the ledger. Well, after some careful measuring it was discovered that the 425 Toro/Starfire engine had higher compression pistons than the std. While the 442 package had been […] 3) engine Horsepower / Torque Curve. com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon. 0L/425 Oldsmobile V8 Engines & Components and get Free Shipping on Orders Over $109 at Summit Racing! $20 Off $250 / $40 Off $500 / $80 Off $1,000 - Use Promo Code: CARCARE Vehicle/Engine Search Vehicle/Engine Search Make/Model Search Nov 13, 2008 · The 425 is a great engine with plenty of torque. Options remained the same, but sales jumped up in this Sep 23, 2018 · The 425 returned with an additional five horsepower, totaling 375, but Starfire no longer had Olds’s most powerful engine–that distinction went to the all-new Toronado, which received a 385-hp 425. stroke, the layout thoroughly embraced GM’s latest short-stroke theories, while generous 4. 5: 155 @ 4200: 240 @ 2000: 30-45: AC R46N: 0. Not exactly a 370 horsepower 425, but for the early 90’s, 140 horsepower in a fairly light car wasn’t bad at all. This crank can make an early 400 engine [using a 4. 5" high followed by the casting number. SO ARP main studs are a worthwhile upgrade tar anv performance Olds. 875 x 3. 30: Welcome to NewOldsPerformance, your ultimate destination for Oldsmobile Street Performance parts for your 60's, 70's and 80's Oldsmobile. There was the 395 A Trophy Engine, & the 425 A Trophy engine. lbs. 735 7. 0" tall water pump. The transmission in question is a three-speed Turbo-Hydramatic automatic unit. An outstanding 350 Oldsmobile engine for sale would be perfect in a Cutlass convertible. Cylinder Head Studs (1/2in. Need to be careful of lifter bank angle. Oldsmobile Engine Build - Milennium 403 GETTING DYNO READY aPrior to the Jeg's Engine Masters Challenge competition, Dick only had two days to dyno-tune this engine (seen here at Southern Performance prior to the Challenge). If non Toro it will be small lifters and the different cam bank angle. Aug 10, 2005 · 1966 Oldsmobile Toronado. The engine was used across the Oldsmobile lineup through 1976 and horsepower ranged from 275 up to 400. Are you looking for the ultimate Oldsmobile 425 connecting rods for your high output engine project? Molnar Technologies H Beam 425 Oldsmobile connecting rods are machined from billet 4340 steel, and then heat treated to provide improved strength. Through our research and development program we have learned exactly what these Oldsmobile engines are capable of, mechanically and throughout many different Find OLDSMOBILE 7. In 1968 Oldsmobile debuted the Rocket 455, an engine that was part of a family of 3 (with 400 and 425 cubic inch engines sharing a similar architecture). Detailed engine characteristics. They will rev higher than a 425. Exhaust Manifold Bolts 35 ft. Cams. lots of torque but it wouldnt rev much past 4500. 040" rather than . 125-inch bore x 3. Start in 100 F & -20 F temps easily. 000 in Materials: 4340 (40CrNiMoA) Aircraft quality steel for Higher strength. nginx. The FAQ was built off several email newsgroups and other places on the web many years ago. 5:1 compression ratio. See All 19 Photos Dec 19, 2019 · But the 400 and 425 may have the better performance, larger cast iron exhaust manifolds. Maybe they have different roll pin or shaft sizes? (0. bore spacing left plenty of room for future displacement increases up to 425 CID. 1965-69 Oldsmobile engine tune-up specifications including timing, dwell angle, and Spark Plug Gap, and firing order. Specifications listing with the performance factory manufactured by Oldsmobile in United States ; 2-door coupe body type; RWD (rear- wheel drive), manual 3-speed gearbox; gasoline (petrol) engine with displacement: 6964 cm3 / 425 cui, advertised power: 279. 0:1 at 310 hp (230 kW) or 10. also a big prob i had was spark knock due to 10. Rocket Racing has a new Olds block that fixes all the weaknesses of the stock 455 and can be taken to nearly 550 cu in. com. 2 cu in/6967cc OHV V-8, 1x4-barrel Rochester Quadrajet carburetor . 842 in (21. nor do I think a small block should be in these cars. In engines as close as the Olds 425 & 455 the size numbers are fairly similar, so the results of building either will be similar. Mar 5, 2018 · Mark Remmel in Florida has built a number of Olds motors that dyno in the 500-600 HP range and live on the street. Oldsmobile engines from 1964 onward originally used a 45 degree cam bank angle (CBA) and corresponding 0. 125 x 3. engine features a 4. Instead of trying to find a new GM crate engine to shoehorn into the Oldsmobile, you could obtain one of our perfectly good used Oldsmobile engines for sale. The 330 will have log manifolds, extra outlet can be capped, cap still available new. P. It was the introduction of the radical Toronado that stole much of the Starfire’s thunder, and its place as the brand’s halo offering. Feb 28, 2013 · View complete technical specifications for 1966 Oldsmobile Toronado. With its 4. 49) Crane Cams makes an adjustable vacuum advance unit for the 1956 distributor, there's also a Petronix Ignitor kit for this unit. 125" bore A, D, or F block and 425 pistons and rods], or a 455 small block [with a 350 Diesel block and about $3000 worth of Mondello parts]. The cam casting number found on the casting itself, and bears little or no relation to the grind performed on the lobes. 25 layout that helped promote Oldsmobile’s legacy as a torque producer but hindered hot rodders looking for elevated rpm capability. Q: What transmissions did the 1966 Oldsmobile Starfire have? A: The 1966 Oldsmobile Starfire had the following gearbox options: 3 speed Manual, 4 speed Manual, Automatic Turbo Hydra-Matic. Nov 4, 2021 · 1965-67 Olds 425 crankshafts are forged and quite nice, especially for the era. 335 cu in) Engine Family. Offering between 310 and 400hp, and pushing out a spectacular 500 lb-ft of torque, the 455 big block was most famously used in the 442 muscle car. My brother's '67 Olds has a 425 and is still going strong with orignal miles. Buick's first generation V8 was offered from 1953 through 1956; it replaced the Buick straight-eight. 1968-75 - Stamped on the oil fill tube. bore and 3. | 7. 3) Horsepower/Torque Curve I ground the bumps off my #5 heads and it was a long job. 6" or 6. 250 Stroke, Eagle 6. They are thin. With a Rochester four-barrel carburetor and 10. in. rocket racing oldsmobile bbo 400 425 455 billet aluminum alternator bracket relocate kit. Three V8s that need some love. Bill Trovato's latest edition of Oldsmobile V-8 Engines: How to Build Max Performance is a Mar 26, 2011 · The A heads may have a one year only rocker setup. There is no other place in the world that has more experience with performance Oldsmobile engines. Additionally, OEM high-performance components are also reviewed, as are the aftermarket components available for these engines. It has basically the same bore/stroke ratio as the 302" Chevy and it has 6. Compression would drop from 10. The end may have come for General Motor's Oldsmobile division in 2004, but faithful fans of the brand are relentless in their HP is the mechanism that lifts a 550 pound weight at the rate of 1 foot/sec. Dec 22, 2006 · 425 and 455 parts interchange i thought the 400 was a differnt animal tho. This let the engineers increase the ramp speed of the camshaft for more power, 385 hp (287 kW), without sacrificing idle or reliability. At first glance they appear identical, but the T/S pistons have a slightly shallower dish, like . 975-inch stroke and a 10. Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Oldsmobile Delmont 88 425 Holiday Coupe Super Rocket V-8 300 hp in 1967 the model with 2-door hardtop coupe body and V-8 6964 cm3 / 425 cui, 223. Aftermarket cranks and rods are available. Oct 31, 2009 · The 425 (second gen Olds motor) did not come out until the 1965 model year. [ Thanks to Eric Brubakken, Bill Culp, Bob Barry, Joe Padavano, Mick Gillespie for this information ] BB, SB Head Flow Jun 3, 2003 · Doesn't share anything with a Chevrolet engine. So if you plan on putting the 425 in front of a M/T, make sure you get the right flywheel for your early Gen II Rocket. To my knowledge all the 425 engines had forged crankshafts and larger diameter lifters than the later engines. 5-1 compression ratio. There’s the stout 425ci Buick nailhead, the even badder-asser Olds 425 engine that was one of the hidden gems of the muscle car era, and the Caddy 425 that wasn’t. 975” to the 455’s 4. Also if a Toro engine the 425 was pretty powerful stock with high compression. unless they gone out of business, MONDELLO used to have hi-po olds stuffalso i hated the stock aluminum rocker stands Jul 15, 2021 · Oldsmobile 455 V8 Big Block. They were supposed to have 385 HP and around 480 ft/lbs torque from the factory. Its block and heads employ precision casting techniques to reduce weight. 64 KW) @ 4800 RPM. If you have a Toro engine it will run the large lifters mentioned in an earlier reply and would be the "modern" cam bank angle. Come Saturday & Sunday go to the Dragstrip and do heads up drag racing. Since valve size and port size and shape is a limiting factor with Olds heads the 425" seems just the right size for the stock heads. 125 x 4. 500 inch (milling neces- Aug 24, 2020 · SAE HP - required a standard production engine be taken at random off the engine line, equipped with oil pump, water pump, fan, distributor, and generator/alternator. 975 bore and stroke values were in keeping with forward short-stroke thinking, the 455 regressed to an undersquare 4. Here is an example of some common normally aspirated chevy engines we build with some impressive horsepower at Eddies: a Oldsmobile 350 Engine Rocket 350 - Up To 450 hp a Oldsmobile 400 Engine - Up To 500 hp a Oldsmobile 400 Engine 4-4-2 Rocket - Up To 550 hp a Oldsmobile 425 Engine Super Rocket - Up To 605 hp a Oldsmobile 455 Engine - Up To 625 hp manufactured by Oldsmobile in United States ; 2-door coupe body type; FWD (front-wheel drive), automatic 3-speed gearbox; gasoline (petrol) engine with displacement: 6964 cm3 / 425 cui, advertised power: 287 kW / 385 hp / 390 PS ( SAE gross ), torque: 644 Nm / 475 lb-ft, more data: 1966 Oldsmobile Toronado (aut. Good luck with yours! if it is indeed a real toro motor, be aware that You will need a specific camshaft for it- the lifter banks are at a funky angle. The 394 used a completely different mounting scheme (single front mount and bellhousing side mounts than the 425 (side motor mounts and single trans tail mount), so it is not a drop-in swap. 5:1 pistons and decent flowing big valve heads. Oct 31, 2024 · In 1965, Olds came out with the Rocket 425, which is considered the greatest muscle car engine that never actually went into a muscle car. S. There was also a new 400-cid 345-hp Oldsmobile V8 for the one-year-old 4-4-2 high-performance model. (425. 921-inch-od lifters, instead of GM's mainstream 0. There is not much in aftermarket parts around like for the 455. 25:1 compressions. Or you could offset stroke the 425 crank if you go with different set of rods (such as stroking from 3. Is your engine complete and running? If so and you decide to let it go, get in touch with me. 3) Horsepower/Torque Curve Nov 28, 2023 · The F-85/Cutlass line was only slightly changed in 1965, but the 442 received it’s first big block 400 CID V-8. mounts alternator on usa passenger side. 25” stroke with BBC journal). 5 or 0. lbs. 0L forged connecting rods 6. 20-in. 035: 0. Includes performance data, fuel economy, dimensions, engine details, and more. Cam use is identified chiefly by the pattern of chamfers on the front OD, the location of the notches on the front face, and occasionally they were kind enough to actually put the last 3 digits of the cam PART # on the back of the cam. 44S -. Power and torque (SAE gross): 385 hp @ 4800 rpm, 475 lb-ft @ 4000 rpm Educated gearheads also know that Olds made a 350ci diesel engine based on the traditional gasoline design, and these beefy blocks have proven to be solid foundations for high-performance gasoline engines. It was the working man's daily driver hotrod race car. if I am gonna make one fast, its getting a big block Olds or a big block Caddy. 921 in (23. Thanks HP is the mechanism that lifts a 550 pound weight at the rate of 1 foot/sec. The 389 ci V8 engines. The 455 is a very forgiving and long-lasting engine. Used primarily for the Toronado full-size luxury car, it Jul 10, 2012 · camshaft gear. It also had to have standard exhaust manifold and header pipe in place. The Edelbrock Performer manifold is a nice unit but a bit closer to stock than we'd like to see for Aug 11, 2009 · It's a 67 Toronado engine so it has all the good stuff including 10. , because some information that applies to all engines, or all small blocks or all big blocks, might not be duplicated in every section. The bore was kept the same and the stroke was extended. They both have value. Products. Torque is the mechanism that keeps the engine turning when a load is applied. 735 H-Beam Rods, SRP Forged -5cc Flat Top Pistons, Rings and Bearings included Learn More The 403 is a mediocre all out performance engine. This angle is formed by the intersection between the cam centerline and perpendicular lifter centerline. Flywheel-to-Crankshaft Bolts 75-85 ft. 0 L) was called the Super Rocket, and was the most powerful engine option for the Oldsmobile 88 and 98 of 1965-1967. The car runs and drives great! It has the 425 High Output Super Rocket engine. A big block measures 14" between the heads at the manifold base. While officially called the "Fireball V8" [1] by Buick, it became known by enthusiasts as the "Nailhead" for the unusual vertical alignment of its small-sized valves (Originally it was known to hot-rodders as the "nail valve", because the engine's The 425 engine grew to 455 cid and 310 hp, gaining 10 over the prior year. For 1969 and 1970, the short-lived Delmont was abandoned, and all 88 models would be considered Delta 88s. SAE Net HP - all the above, PLUS all standard accessories found on the average model the engine was A: The engine powering the 1966 Oldsmobile Starfire was a V 8 (6965 cc | 425. 3, main-bearing taps. According to my trusty Olds engine book, the 455 was available in 310 hp, 320 hp, 365 hp, 370 hp, 390 hp, all street engines, with full manufacturers warranties. We are known for our high quality,attention to detail and meeting our customers goals. Feb 20, 2024 · See more Oldsmobile 425 Bare Engine Block 389244 D; Share. The Toronado 425 engines had the same . Interestingly, Dick has chosen to begin with a more "garden variety" 350 Olds gas block. 5:1). Without testing a wide variety Jun 26, 2015 · It was an engine option from 1959-1961-1962. In my opinion, assuming you're Quadrajet 4-barrel is in good shape and the engine is properly tuned, good points, rotator, cap, wires, spark plugs. The main bearing webs are the weak link and the engines can usually accept only a . This knocked torque down to 460 lb-ft and horsepower to 350, both gross ratings. You cannot use an earlier oil pump in the 1961-64 engines. Oldsmobile Big-Block V8. Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Oldsmobile Ninety-Eight Luxury Sedan Super Rocket V-8 365 hp Turbo Hydra-Matic in 1967 the model with 4-door sedan body and V-8 6964 cm3 / 425 cui, 272 kW / 370 PS / 365 hp (SAE gross) offered since September 1966 for North America . Jun 17, 2004 · BTW,a baumont was a spin off of the 98 wile a delmont was the upscale 88. We’re going to take these three engines from the least power to the most. Oldsmobile Small-Block Engines Cylinder Head Bolts (1/2in. The first V-8s in this new-style Oldsmobile engine line started as the 330-ci models for the small-block family and the 400- and 425-ci models for the big-block family. 0 cu in. 5:1 to 8. 425. In addition NOP now offers Small Block Stroker kits starting at $2595. Oldsmobile FAQ 425 CID Engine Detail. 019: 31-34: 153624: TDC/4° auto-12: 250 H. The Jetstar I’s 370-hp 425-cu. It has 72,000 original documented miles. Torque Specs are for clean and lightly oiled Feb 23, 2021 · In 1971 the Oldsmobile 455 V8 would begin to fade from the high performance landscape. 842-inch lifter diameter. This unit, used in the 442's early 400 engines and all 425's, has a stroke of 3. 75-in. One of the other limiting factors of the engine, besides low compression, is restricted breathing. big block; Olds 455 c. They were enlarged to 350 cid in 1968 to follow the General's trend- Chevy had a new 350, and the others had 330 (Olds), 340 (Buick), and 326 (Pontiac) engines, and no way were they going to allow lowly Chevrolet to have a bigger small-displacement engine. Engines making 450-500 hp should use studs and Mondello's straps on 2. Oldsmobile 455 Rotating Assembly Kit, Eagle Cast Steel Crankshaft 4. 1966-71 & 73 6-250 - Right side of block rear of the distributor. The newer Oldsmobile engines (330,400,425,455) fit & are the hex drive only. 842" diameter lifters. The stroke is shorter than the 455", which gives it just a tick more rpm capability. The 322 Fireball V8 in a 1956 Buick Century. 5 kW / 380 PS / 375 hp), edition of the year 1967 since September 1966 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 Mar 25, 2020 · Okay, let me go down the rabbit hole on this one. Firing Order . ) with 365 BHP (268. 500 c. Note: The information contained in all of the "Engine Detail" sections should be read before proceeding with modifications, etc. Sep 1, 2005 · After minor tuning, the 425 responded with 456 hp at 5,100 rpm and 526 lb-ft at 3,600. Here is an example of some common normally aspirated chevy engines we build with some impressive horsepower at Eddies: a Oldsmobile 350 Engine Rocket 350 - Up To 450 hp a Oldsmobile 400 Engine - Up To 500 hp a Oldsmobile 400 Engine 4-4-2 Rocket - Up To 550 hp a Oldsmobile 425 Engine Super Rocket - Up To 605 hp a Oldsmobile 455 Engine - Up To 625 hp Nov 15, 2021 · Oldspower is the Original Oldsmobile Performance Site. To date we have logged in over 42+ years of extensive dyno and on track testing. Preferably high compression, and a 4 barrel engine originally. Has 80cc combustion chambers. 5 kW / 304 PS / 300 hp (SAE gross) offered since September 1966 for North America . Stock HP ranged between 345 and 375 HP. Specifications listing with the performance factory particular, and if you build Olds engines, it oughta be in your toolbox. Horsepower in 442 models was upped to 345. Aug 3, 2022 · Brings to mind a similar experience with my grandpa Dan…in the early 90’s my grandmother decided it was time to replace her ’79 Mazda GLC wagon and they came home with a new Protege LX, with the DOHC 1. Olds 425 c. MODERN OLDS V8 ENGINE SPECS. Yes you can bolt the mounts off the 350 right to the 403 and drop it in. bolt) 130 ft. 8 engine. ; Testing : Magnafluexed, X-Rayed / Sonic Testing for higher Quality. [ Thanks to Rob Thomas, Bob Barry, Joe Padavano for this information ] Rev Potential, Limit The early 400 engines rev higher than any other big block. jxyyouf ofkj jwabue npaha jrlgim nebn lhcwq echb tpgxh zwxwvi ygfjko znl hqso ywvfqf zgqmqc