1969 Chevrolet Yenko Chevelle COPO 427 specs, 0-60, performance data, top speed, engine specifications, pictures. That netted 471 horsepower at 6,500 rpm with torque coming in at 409 lbs.-ft. at 5,500 rpm. . 15.4 sec @ 92.0 mph. randomcontent[1]="http://chevellestuff.net/sidebar/random02.htm" She has written numerous articles for various online publications. Jeff could have easily infused a lot of compression and cam into the little 307 and built a monster mill. Unlike in 1968, you could now order the L89 package 396ci engine. Eager to find a way to circumvent GMs power limits, Chevys performance-products manager used the Central Office Production Order (COPO), usually reserved for special fleet orders, to order 323 specially built Chevelles. The most impressive part of this engine making so much power is that the bore is so small at 3.905 inches and the intake valve equally as small at 1.940.. The block was align-honed and fitted with ARP studs. The 327 Chevy engine has 365 horsepower at 3,200 rpm. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. if (ie||dom){ This engine was designed to function well in low-performance vehicles such as sedans and other family-friendly cars. The consent submitted will only be used for data processing originating from this website. Information and specs on the Chevy 307 V8 Engine. The compression ratio is 11:1. you can juggle a bit for best performance. Very nice build. One was a Holley HP 750cfm with vacuum secondaries while the other was an 830 cfm HP.. While a certain amount of this was due to testing standard changes from "gross" (just the engine with no exhaust . I love doing these types of engines when the customer pays me to. 396 (RPO L34) 350 @ 5200. What made those numbers even more impressive was the fact that after we had removed . Chevelle 300 Deluxe: 4dr 6: 116: 3100/3100: 7.35x14: 5 x 4.75: 21,000: Chevelle 300 . 14- Manual trans and Air Injection reactor system. The horsepower and torque of the Chevy 307 engine varied slightly from 1968 to 1973. Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Chevrolet Chevelle Malibu Sport Coupe 307 V-8 Turbo-Fire Powerglide in 1969 the model with 2-door hardtop coupe body and V-8 5025 cm3 / 306.6 cui, 149 kW / 203 PS / 200 hp (SAE gross) offered since September 1968 for North America U.S.. In any case, the engine runs much better if I crank it up a bit. Makes me want to build a 307 just to have someone ask What Are You Running for a engine??? Not bad for the little 307 Chevy., Jeff went on to say with the smaller 750 HP with vacuum secondaries, it would use less gas than a 350. Being this close to 500 horsepower, Jeff wasnt lifting now. The 1972 engine has a maximum brake horsepower of 130 at 4,000 rpm with a torque of 230 foot-pounds . My objective was to make something special out of an odd-duck, no respect engine that has been normally cast aside for one of its bigger brothers. solenoid disconnected. I would of filled the block to 1-1/2 from the deck and plate honed it for sure. Vehicles with Similar 22.13 HP/Weight Ratio. And because this engine will still have more exhaust cam than it needs, Jeff went with 1.6 ratio Trick Flow rockers on intake and 1.5 on the exhaust. Panel alignment and door gaps are quite good, and the light pinstripe that runs the length of the car gives it a sleek look that proves you don't need SS stripes to have a great-looking A-body. This year, the 327ci engine was dropped from the lineup in favor of the 350ci engine. With benches and a column shifter, it has a very laid-back demeanor that's perfectly appropriate for the Chevelle, and all of it remains in good condition. The 1969 Chevrolet Chevelle and Malibu series included this . However, there is another group out there, who really prefer the 69 with its unique one-year-only looks. I have tried to set the timing as per the Haynes manual (2 degrees @ 700 rpm), but it doesn't seem to work very well. Its out of my 1971 k10. Very pleased with the results, Jeff told us, Weve made more than a hundred horsepower from the 307/311 without ever pulling the heads., Throughout the process, we performed several timing test pulls. 1966 ] | [ Some cars are very much cheaper to insure than others. Ive never understood why Chevrolet never hotrodded the 307, which had the same kind of potential as the 283. The Chevy 307 V8 engine came along in 1968 to replace the Chevy 283 V8. He wanted more and without pulling the heads. In short: It seems like the timing should be quite a bit higher than what the manual says. fastestlaps. The horsepower and torque of the Chevy 307 engine varied slightly from 1968 to 1973. Image courtesy Chevelle Stuff. The number I recall from last time is 36 total, but the scale on the pointer is one of those stupid "0" to "A" so I haven't been able to check. // window.onload=random_iframe, Mac's This one was the humble Chevrolet 307ci small block, which replaced the venerable 283 that had been in production since the 1950s. You're just jealous because you can't hear the voices! It was darned expensive. Jeff opted for Trick Flow (#30310003) cylinder heads and intake, which were ported for a perfect match and improved flow. The PRO L34 - A 396 cubic inch (6.5 L) 350 horsepower engine. If that setup caused ping I'd change the vac adv pot to a less sensitive one that started advancing at a higher vacuum level. Then I raised it to 10 degrees (eyeballing outside the tab) just for fun, and had a noticeable bog when I hit it from part throttle. None of the COPO Chevelles built were Super Sport models, they were all built from base coupes with the $860 COPO option package. Vehicle information, history, and specifications from concept to production. Stock 200 hp pulls 80mph in first with 2:78 gears. $58,900. or Mark). 10- New .019, used .016 Turn adjusting screw in Clockwise until engine misfires, then turn screw out 1/2 turn. 1969 Chevelle - Muscle Car Facts Another engine that added excitement to the Camaro was the 302, dispensing 290 horsepower at a high winding 5,800rpm. 1965 ] | [ My CNC race preps a block in 30 minutes and that is bored, and decked in perfect 45 degree bank angle as well as bored on that degree perfectly. I was trying to help it to stay closer to the way it was before lifter change. That and a freeflowing exhaust with 3.08s and a 4 speed. That would be best combo to use on the street for both the commute and play, Jeff commented, I believe if I put the hydraulic roller back in it with the better valve springs and the Canton oil pan, we would conservatively make 475+ horsepower and 410 lbs.-ft. of torque. Thank you, This hits close to home. Copyright 2023 Leaf Group Ltd. / Leaf Group Media, Newton Ask a Scientist: Engine Terminology. Chevrolet Yenko Chevelle COPO 427 specs, 0-60, performance data You can use 1.94 or 1.84 intake valves in a good set of heads WITH SMALL CHAMBERS. Jeff I live in colorado and I need my pickup engine rebuilt. Your email address will not be published. Chevrolet Chevelle - Wikipedia 7.6 sec. Chevrolet produced a limited number of COPO Chevelles, specially ordered from the factory by specific dealers and a few select customers. The pickup in the HEI and big cap work better than you think and you used the MSD anyway. //Specify random URLs to display inside iframe The base 396ci engine was available with 325 horsepower, or the optional L34 396ci engine got you 350 horsepower (both had Rochester carburetors, 10.25:1 compression and two-bolt-main blocks). TDC- Top dead center. The hydraulic cam does not have clearance ramps so I set the lash at zero cold. V8. 1969 Chevelle SS 396 Engine Lineup. I would have just put the black mamba lifter in with a cam not like yours but for sure used a 106 lobe separation. Chevy rated the horsepower for the COPO Chevelles at 425. 2) Horsepower/Torque Curve Either way, nice job, Maybe we will see your build up here next, I would like to see the numbers in comparison. While engine at normal operating temperature and transmission in D" dwell should be at 30 and ignition should be 8 BTDC (Idle Speed 550 rpm). Timing on '69 307? | Team Chevelle got a Buick V-6 with similar specs. An 450 HP 454 V8 was available. With the 4.4-liter V-8 gone, the 150-horsepower 5.0-liter V-8 became optional on wagons and sedans; it was previously offered only on . Vehicles with Similar Dimensions. Hauling around an Impala? Those very low initial advance specs are for emissions purposes. 396ci/350hp. Engine Used. Vinyl tops were made available for all coupe and sedan models. The 307 is a large-journal 327 with 1/8 inch smaller bore. Malibu Series 36 V8 Convertible 2 dr. 6 P : 1969 Chevrolet Chevelle Series Specifications. The Nomad wagon also remained part of the 300 DeLuxe line, a stripped down model offering the lowest price of the Chevelle wagons at $2,783. A Celica 5-sp will cope with 300 hp. All rights reserved. Whats The Reason Enthusiasts Cant Get, Yes I Am A Dinosaur, And Why I Feel Electric Cars, EngineLabs Tool Of The Month Summit Racing Pro Ring Filer, Hoard Of Biscaynes, Bel Airs, And Impalas Found In Oklahoma Barn, Cool It: Tips For Selecting The Right Cooling Fan For Your Ride, Harrop Engineering Goes Behind The Scenes At Mast Motorsports, Fenix Is A Next-Gen 69 Camaro With 1,180 Horsepower, Shop Tour: Brian Tooley Racing Expands To Be A One-Stop Shop, Moroso Anti-Roll Kit Is The Right Tool For The Dragstrip. well, a 307 will also do that pretty well. All Rights Reserved. The small journal crank was sweet but the Hp and torque you done were impressive. The original steering wheel warms up the matching two-tone upholstery, while the column shifter for the automatic is easy to grab and is a trademark of late-60s GM A-bodies. Despite Jeffs best effort, he understood there was a lot of power sleeping in the petite Chevy small blockmore than he even knew or expected. Main cap bolt, 396-454 4-bolt (inner/outer) 110 ft.-lbs. The Saginaw four-speed and the Rock Crusher manual transmissions were available, as was a Turbo 400 automatic. In comparison the '69 specs for the L65 350 2 bbl engine list 0 deg at idle and 36 deg . L6. Not being an SS doesn't mean the interior isn't a performance-oriented place to do business in comfort and style. Zero to Sixty. 30+ days ago. It idles smoothly, doesn't bog when I floor it, and the throttle response is way better. var iframeobj=document.getElementById? 1968 Chevrolet Chevelle. This was only available as a Central Office Production Order. The 307ci engine was first produced in 1968. I would have sped up the piston speed with a 5.7 connecting rod and that is even to long. Thanks guys! That's only 30 deg total advance (initial plus mech) which isn't much for a small block Chevy. . Chevy borrowed the 327s crank, which made it easy to increase the 283s displacement to 307. It could make a lot of power yet be fuel efficient for the daily driver. 396 (RPO L78) 375 @ 5600. I also changed rocker ratio to 1.5/1.5 intake/exhaust. He added, I also added a better Canton oil pan with a windage tray and full kick out from Canton.. 9 - Marketed as 396 but A TH400 3-speed automatic transmission was swapped in favor of the original Powerglide and it makes every drive a pleasure, and with new components like a fresh shocks and newer gas tank underneath, you can cruise without a care. Required fields are marked *. What Jeff did know during that first dyno session was he didnt have enough cam to make real power. Stepping up a little meant that you could get the 375 horsepower L78 engineagain this year with an 11.0:1 compression ratio, solid-lifter camshaft, and a Holley four-barrel carburetor on an aluminum intake. The lengths of all models varied slightly from previous years and now had three different length categories: 4-door models were 200.9 inches, 2-door styles measured 196.9 inches wagons were 207.9 inches long. 1969 Chevelle Engine ID Codes Total timing of 35 degrees BTDC was all it needed. 1970 Chevrolet Chevelle Series 1969 Baldwin-Motion SS427 Phase III Chevelle. Muscle car enthusiasts may have been upset to see the additional disappearance of the SS 396 Sport Coupe as its own line, but the SS 396 became an accessory package that could be added on to any car in the Malibu series. 1969 Chevrolet (USA) Chevelle Malibu Hardtop Coupe Series 2 1970 Chevrolet Chevelle. document.write('') 1970 Chevelle - Muscle Car Facts The engine delivers its power through to the wheels by means of a 3 speed manual gearbox. The bottom end was balanced and fitted with super light bob weights at 1,550 grams. We used to call them Belly Button Motors because everyone had oneright? The stone stock L78 proves GM was underrating things back in the day. 1969 chevrolet chevelle 307 - Trovit All 396ci engines were available with chrome valve covers, but only the 350 and 375 horsepower models were equipped with an open-element air filter. The 1968 to 1971 engines have a maximum brake horsepower of 200 at 5,800 revolutions per minute and a torque of 300 foot-pounds at 4,200 rpm. The Chevrolet Chevelle is a mid-sized automobile that was produced by Chevrolet in three generations for the 1964 through 1978 model years.Part of the General Motors (GM) A-body platform, the Chevelle was one of Chevrolet's most successful nameplates. 1969 Chevrolet Chevelle | Classic Cars for Sale - Streetside Classics The engines available in base-model Chevelles still included the 230ci and 250ci six-cylinder engines (140 and 150 horsepower respectively), and the 307ci V8 that put 200 horsepower under the hood. Torque. This was a great time to be a gear head. The Chevy 307 V-8 has an oil pressure range of 30 to 45 pounds per square inch (psi). What I feel I learned at this point is that because the cam was essentially the same specs as before, the torque number should not have dropped that much. We have much more information about the ever . He performed a simple cam swap to a Comp Cams 242/248 duration (0.576/0.562 inch lift intake/exhaust) with 110 lobe centers (#12-443-8) and an intake swap to an Edelbrock single plane Victor Jr. with an in-depth port job along with a Wehrs carb spacer and a Melling billet one-piece oil pump with Shark Tooth Technology. The 1972 engine has a maximum brake horsepower of 130 at 4,000 rpm with a torque of 230 foot-pounds at 2,400 rpm. 230 cid (STD) 140 hp @ 4400 RPM. There was also a last minute cam change from 242/248 on 110 lobe centers to a Comp Cams solid roller cam254/260 on a 110 lobe centers. Reportedly to meet new emissions standards, the late-1969 models were held 402 cubic inch engines, though the official name was never changed. That indicated 1.5 horsepower per cubic inch. I generally set total around 38 degrees around 2500 rpm. Thats all and you have 240-250 hp and GOOD TORQUE that idles and runs nicely with your auto or manual tranny. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Jeff Latimer, a savvy engine builder and racer who used to manage JGM Performance Engineering in Valencia, California, came to us with an intriguing engine build project no one had ever tackled before. : anything will do from power packs to 305s. A nice vintage hardtop with a lot going for it, you can enjoy this dialed-in V8 Chevelle for just pennies on the dollar compared to a big block SS. 1969 Chevelle Parts and Restoration Information - SS396.com Bench Racing Performance Engine Body Shop Chevelle Tech. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. The compression ratio is 9-to-1. Registries for Chevelle/Camaro/Nova/HHR. 16- CA 600 rpm The engine has AC-R45S-type spark plugs with a 0.035 gap. In addition to the wider variety of Chevelles able to include the SS 396 package, more changes to the line came late in the 1969 production year. Id like to keep original engine in it, but would love around 375 hp, I dont have anyone local who can build it, any ideas, What bearing spacers where used ugg trying to build this motor. Chevelle enthusiasts are typically divided into a few camps: some prefer the mid 60's square body design, while many others maintain the 70-72 years are the golden era. Jeff reflects on this purely experimental project. 1966 Chevrolet Chevelle. Jeff went back to the dyno with fresh 5w30 Mobil1 synthetic, then warmed up the engine. This is evidenced by the late-run COPO 427s. Chevrolet Chevelle Performance Statistics, Plymouth Barracuda Performance Statistics. Engine: 307 V8: Transmission: 3 Speed Automatic: Color: Frost Green: Interior: Green: Mileage: 31,748 (Unknown) Chassis; Front Wheel Specification: 15" Rear Wheel Specification: 15" Front Tire Specification: 215/70R15: Rear Tire Specification: 215/70R15: Front Brakes Specification: Power Drum: . I recall new 1968-73 Chevelle wagons, sedans, and hardtops up and down our Maryland block with 307s. For a 37-year-old engine, a peak of 230hp at 5,000 rpm and 278 lb-ft torque at 4,000 rpm are quite impressive. Good job guys,all these haters.I like odd combos.any body can buy and build 327s,350s.again great job. Now that the Malibu contained even more sub-series as of the 1969 model year, its share of the whole Chevelle market jumped to an astounding 83.5 percent. Under resto. That distributor doesnt appear to have a vacuum advance on it. Plenty of low-end torque. V8-307: 2 Barrel: 3.875 x 3.25: 307: 9.00: 200 @ 4600: 300 @ 2400: 30-45: AC R45S . Engine Type Cubic Inches. 1969 Chevrolet Chevelle Series Specifications - Conceptcarz.com All rights reserved. I'd limit the vacuum advance to 15 deg max. Whats more, the 327s 3.250 inch stroke made the 307 a clear winner. However, the federal government's emissions regulations of 1972 saw the 307 de-rated to 115 horsepower. Beaumont (automobile) - Wikipedia The torque rating is 350 lb-ft. at 4,000 rpm. The rumbling 307 cubic inch V8 is believed to be the original motor, but as a small block Chevy, you know it runs right and sounds great. . Chevy 307 V8 Engine, Specs and Horsepower : Engine Facts.com Chevrolet produced the 307 from 1968-73, which means there are a lot of cores out there waiting to be rescued and built. The point is how to make real power from 311ci. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. 1972 ]. 1969 ] | [ } The engine delivers its power through to the wheels by means of a 3 speed manual . The carpets are plush, the headliner is taut, and the door panels are wonderful bookends in this original stocker. For a better experience, please enable JavaScript in your browser before proceeding. Power and Output. The V8 series got the standard 210-horsepower 327. Body styles included coupes, sedans, convertibles, and station wagons.The "Super Sport" versions were produced through the 1973 model year and . Never again would this much power be built into these cars. Reply. No difference in performance. 31,740 Miles. They were good solid dependable engines with a long legacy of service. One of them was that the SS 396 was no longer a standalone model, and the other had to do with engine availability. I have often wondered how light you can get a SBC and still GO. It doesn't say, but I assume this number should be with disconnected vacuum. He added the two highest horsepower numbers were with the 830. It was his belief we needed more rpm to pass 500 horsepower. 13- CA 6 BTDC. 1967-1972 Chevy C10 Truck & GMC Truck Buyer's Guide - MotorTrend actually 402 cu.in. Jeff was positive more could be done with the 307. The paint is likely original, or at least a very old repaint, so it has a few signs of age, but you'll still be proud to show up in this hardtop at the local cruise night and the color hides imperfections quite well. A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. Just add a Q-jet on a stock manifold and it will surprise you. Chevrolet 1969 General Specs - Auto Hobby Page Let's see what headers . Unauthorised republishing prohibited. T Numbers matching 307 V8. However, when an automatic transmission was ordered, all engines were equipped with a closed air-cleaner assembly. The interior colors for the 300 DeLuxe lines were limited to black, blue or medium green for cloth-and-vinyl interiors, or an all-vinyl interior in black. 1969 Chevrolet Chevelle - Oldride Top Contributors this Month View All J. just_a . Prev--- Chevrolet 1969 General Specs ---> Next |engine|chassis| Engine Engine: Carb: Bore and Stroke: Piston Dis place ment Cubic Inches: Com pres sion Ratio (Stan dard) . Youve seen hundreds of thousands of them in Chevelles, Novas, Camaros, and untold other mainstream Chevys. Jeff opted for a cool aluminum timing cover. It lifts the design beyond mere transportation and gives it an upscale look that complements the handsome trim and tidy proportions. He managed a whopping 70 horsepower increase. An example of data being processed may be a unique identifier stored in a cookie. Though exterior appearance did not change much from the 1968 Chevelle, the most drastic change in the Chevelle line for 1969 was in its series designations. We also added a complete MSD ignition system to keep everything lit at high revs.. The engine uses a bore and stroke of 3.875 inches by 3.25 inches. Over and over again. Thanks for sharing. By doing so, you added $647.75 to the cost, but your 396ci engine received a pair of large valve aluminum cylinder heads. The Chevy 307 V-8 has a displacement of 5.0 liters, or 307 cubic inches. It works by regulating the ratio of air and fuel, and controlling the engine's speed. The engine was used in lower performance oriented family type cars and was equipped with a 2 . The greater spring pressure and solid rollers would allow the engine to rev higher than before., Jeff admits he became greedy about power. Manage Settings I'll probably have to mark it on the damper instead to get a more accurate reading. Chevrolet Chevelle Engine Options: 1969 - Chevy Hardcore In the 1967 SS396 Chevelle the standard engine was called the 325-hp Turbo-Jet 396 V-8. ATC- After top center The 307 V8 by Chevrolet was built between 1968 and 1973. . 1971 Chevrolet Chevelle. And use 98 RON, dont penny-pinch on the fuel! Most of us use a dial back timing light. This article is very instructive about what gets you where, most interesting. Many dyno tests have proven that long rods are a waste of money. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. 1970 Chevrolet Chevelle SS LS5. That first pull was 498 horsepower at 7,200 rpmmighty close to our goal. Though the 1969 Chevelles, even with the SS 396 package, were as powerful as they had been for the previous few years, muscle car enthusiasts were demanding even more power. Montego MX Brougham Sedan Hardtop Automatic, https://www.carfolio.com/chevrolet-chevelle-malibu-sedan-307-v8-237028, 1970 Chevrolet Chevelle Malibu Sedan 307 V8 (1971) data. In the C10 truck with the same specifications, including 10.25:1 compression and the requirement to burn . Though exterior appearance did not change much from the 1968 Chevelle, the most drastic change in the Chevelle line for 1969 was in its series designations. In comparison the '69 specs for the L65 350 2 bbl engine list 0 deg at idle and 36 deg centrifugal, for 36 deg total. The browser you are using is no longer supported! We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. I'd feel safe bumping your initial up to 8 deg at idle (with vac adv disconnected). One interesting fact regarding the Chevy 307 V8 was that it was also manufactured by GM for boat use and sold by the Outboard Marine Corporation as a high performance marine engine. 307 V8, UPGRADED TH400 AUTO, PWR STEER/BRKS. 1971 ] | [ 325 @ 4800. 415 @ 3400. Chevrolet never did a high-performance 307 like it did with the 283. var dom=document.getElementById&&navigator.userAgent.indexOf("Opera")==-1 12- CA 4 BTDC. We and our partners use cookies to Store and/or access information on a device. Continue with Recommended Cookies. //Random iframe content- Dynamic Drive (www.dynamicdrive.com) He had the intake manifold ported a bit more and added half a ratio to the rockers1.6 intake and 1.5 exhaust.
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