302 (may have been used on late 68 model year) 4V . Best for 302-351 cubic inch engines. Ford has always been a car company that dared to go where no automaker had ever gone before. Gurney Eagle : Gurney Eagle race heads : Application. As far as I'm aware you only choice for factory heads in the Boss 302. It would make a nice high rpm engine that was pretty soft on the lower end where you spend the most time. Where in the world did you come up with the "347s are not reliable"?. it will be a "high winder" and with a bullet proof bottom end and a 4 bolt block could run to 10,000 rpm b 4 exploading ! Do 302 cylinder heads increase RPM? However, it is generally agreed that aftermarket cylinder heads can provide significant performance gains, and that aluminum heads are often the best choice for racing applications. crank, offset-grinding it to a smaller crankpin diam. To pull this off, we needed a durable mule, so we chose Ford Racing's Boss 302 345-hp crate engine that comes with a set of aluminum heads actuated by a 0.480-inch lift B303 hydraulic roller cam, and 9.0:1 compression. I had 90 runs on an original Boss 302 in a 70 Mustang. These features improve an engines efficiency, resulting in more horsepower and torque and improved mileage potential. Rugged, ribbed internally and externally, with a large water capacity and excellent breathing characteristics. Also; I had Carroll Shelby/SAAC racing program in several other FORD dealerships . Pair. However, in the upper RPM range, the Boss 302 shows a definite, significant advantage over the DZ 302. Future availability is unknown. Won't work with the 289 stroke. When the vacuum is high, the intake is sucking oil through the valves. And you'd have to replace the factory two-piece valves which are known to come apart randomly for no reason. Im just hoping the new Edelbrock intake that arrived yesterday is better than these. The Tech was nonchalant about this and stated these are a lower end part. These heads feature A356 aluminum castings that are heat-treated to T-6 specs for superior casting strength and quality. . We should stress that during testing we optimized each set of heads for timing and jetting and then ran the engine for two near identical runs, which were then averaged to come up with the final power numbers. 500 max! This minor tune-up would really improve the flow curve and add a measurable amount of torque. Your email address will not be published. This 302 was in a F250 so I have to find the proper oil pan to fit the 83 foxbody, and proper fit for the oil dipstick entering the oil pan. OK, you can do pretty well on a budget. Small block Ford PRO1 20 170cc Aluminum cylinder heads feature high flowing as cast ports with profiled valve guide bosses and are bowl blended on 5-axis CNC machining centers. This is my first engine build, let me know if Im doing it all wrong. Russell; COMP Cams; TCI Auto; FAST; E-Comm Sales: Sales: 888-799-1135 Tech: 800 . They are rugged and ribbed internally and externally for more strength. Condition does not matter! After its time on the pump, the DZ 302 posted 357 horsepower at 6,700 rpm and 333 lb-ft of torque at 4,300 rpm. We used Comp roller rockers for the remaining heads to level the playing field, but if you are considering a set of these heads, be aware that the rockers and fulcrums need to be considered as well. The Boss 302 and 351C-4V head casting are the same except for a minor difference in water passages. Dimensions in Inches (LxWxH): 24.1 x 24.1 x 8.7. They pull much harder through the midrange than the 351W heads they replaced on my 302 Ford. You'll notice that we attenuated the horsepower graph to include just the power curve between 4,000 and 6,200 rpm. As I recall from articles way back, this is an expensive process. were designed to be 1-for-1 replacements for Boss 351 cylinder heads. Experimental Part . That puts lift over .500 inch .514 according to our calculations, minus the lash, Holdener reveals. The Ford heads did well during the testing, making a peak of 362 hp. D. Hearne is on the money as usual. I am presently installing a 302 clevor into a 83 mustang GT. All in all, Im not a fan of this series from Dell. Swirl Remarks CHW's Modified Boss 302 head shows the elimination of a swirl effect at lifts below .600 inches. 125 of silicone is likely to blow out. After spending an hour on the Edlebrock Tech line we determined the instructions are out of date relative to the current product being delivered of the 5073 head. Ford had and did a great job with Ford Motorsports programs which we were in . Next, we test a low-rpm cam and a high-rpm cam in the same engine to demonstrate the power differences. The Coyote V8 engine also concurrently debuted in the 2011 Ford F-150. But it should be noted that Ak Miller built a '67 Mustang at about the same year and created a 300 out of a 240 ( for the younger ones a 300 used to be a truck engine and the smaller 240 was used in the cars,LOL) with a set of Webers and bigger valves and cam, it turned in the twelves, that's in the late 60s. AIR FLOW RESEARCH 1402 SBF 165cc Alum Heads Renegade Street 58cc. Boss 302. For the testing, Holdener put together a non-numbers matching replica of the DZ 302. 1/23 . When I set the carb I get a bouncing vacum needle at idle, Ive been told thats a sign of a sticking valve. Would it mess with the computer really bad. Peak power numbers are always fun to throw around, but car-crafters are also very astute at determining what all that power will cost. DONT USE ANYTHING ELSE OR IT WILL LEAK. For use on pre-pollution controlled vehicles only. I think Im in love, lol!!. Batten was at the top of their game then and were welding up and porting the best bow tie heads on the planet back then, besides all the othher stuff. These heads are coated with assembly lube out of the box. Ford went to Le Mans and beat Ferrari not once, but four times, settling an age-old dispute over who had had the fastest cars in the world. The Fora platform includes forum software by XenForo. Its main function is to seal the combustion chamber and provide a surface for the intake and exhaust valves. Have a 70 351 4v stored 25 yrs 50 k miles complete minus carb dist has manifolds 1800. never lube the seal lip ? I first installed an oil trap in the PVC thinking something went wrong with the piston rings. Purchased a long block on CL. 1-330-630-1555 1-888-841-6556. . I have a 1969 Boss 302 original however I need to reassemble it I originally bought ARIES 10:1 forged pistons I believe 30 over . Cylinder heads casting ID decode for 260 289 302 351 390 406 427 428 429 460FE Boss Shelby. Said to be "overvalved" for street performance. You wont find heads of this quality at a better price anywhere. Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4 reach with flat gasket seat. Same transmission, run a 351W flywheel/flexplate (same as a C). Currently I have a set of 1969 302 d0oe heads, and a set of 1965 289 heads, I heard both of those won't do it without spending a lot of money porting etcI was thinking of gt40 heads. TRW developed these pistons and suppled Ford with them for both racing and production engines. Yes you can bolt the 351C heads to a 289/302/351W block. Ford New Boss 302 w/351C HDS Hex Head Stud Kit. Sizemore, formerly of Preperation H fame, did considerable valvetrain developement and terrorized the former checvvy stronghold of I and J/Gas. (BOSS) For a better experience, please enable JavaScript in your browser before proceeding. The connecting rods and crankshaft are made of forged steel, and the heads are aluminum with roller rocker arms. 1969 - C9ZE-6090-A or C At the time the first heads were done, I think only cast iron were available so they were furnaced brazed.If you sliced them, any shop that repairs heads could do the work. It's all bracket racing. Guys if you want to make serious power. quick fuel 650 performer rpm intake these heads smallest trick flow cam. From new ones to the aluminum headed one I have in my fairlane now. The Boss 302 had been built using a Windsor 302-cid engine, but then Cleveland heads had been added to the block due to their larger ports and valves. It was the most expensive of all the heads we tested. Hate to tell you this but a BOSS 302 has Cleveland type heads. Intake - 2.23 inches Heads are sold individually. It is now becoming sluggish, and I get LBSOD issues frequently because of the wifi. Parts made from tooling for the cancelled 1971 BOSS 302 were used for service. We evaluated each head on the flow bench, average overall power, and we calculated average horsepower-per-dollar. Reportedly designed by a drag racer and tinkerer named Sherman Sligh, the Boss 300 is engine design gone mad. refresh the page. The BOSS 302 heads used some of the biggest valves in the industry. I HAD TO CHANGE OUT THE SPRINGS FOR ONES WITH MORE PRESSURE DUE TO VALVE FLOAT AND I AM ONLY RUNNING AN E303 CAM. These heads feature A356 aluminum castings that are heat-treated to T-6 specs for superior casting strength and quality. The store will not work correctly in the case when cookies are disabled. Some additional 302 factory valve sizes: 69 Boss 302 intake 2.23 / exhaust 1.71. The Edelbrock #5073 E-Street cylinder heads are designed for use with 1955-1986 Small-Block Chevy applications. The 302 has a 9:1 compression ratio, while the 347 and 363 have 9.6:1 and 10.2:1, respectively. For the Boss 351, the entire Cleveland engine was used instead of simply the heads. Maximum output for less money!. So now, we have a pair of legends, being compared on the dyno. However, this time it boasted 412 Horsepower and 390 lb-ft Torque! ONE WAS OFF BY. We got more than 450 HP on Fords dyno when we blew right rear tire and it took out Ford training board. This is where you must spend the money. The Cleveland type heads are used in the 302 heads. With such great success under its seat belt, Ford decided to dabble with the 289 and stroked 302 to see what could be done to further its performance image. If this becomes a bit more subjective by adding in power (and why wouldn't you? Pic 2 is a spot next to a water port on the intake surface where it looks like the facing tool tilted some. Sure there's someone on here that could tell you what heads you have would be better but with the right (mild) cam, good intake, etc. Typing on the key kaed is cumbersome. The cylinder head is an important component of the internal combustion engine in a Ford 302 car. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The BOSS 302 Registry is not affiliated with the Ford Motor Company. extreme amount of burrs left all around the rocker shaft mounting pads. For high-performance's street and competition, our dual-plane design makes outstanding power from 1500 to 6500 rpm. They show to be suitable for the 221-302 Ford Small Block. The Edelbrock Flathead Cylinder Head is made of A356 aluminum T-6 tempered cylinder head. THE NEXT ISSUE WAS VALVE SPRING INSTALL HEIGHT. The holes are just big enough for the spark plug socket, which guides it in perfectly. These new aluminum hemi heads will bolt directly to any small-block Ford from a 289/302 all the way up to 351W as well as Cleveland engines. However, way down low, where the big-port Boss 302 motor isnt supposed to work, it made decent low-speed torque. All they had to do was make the piston dome bigger on the 302 to keep the same 11:1 compression ratio.. A borescope down the intake revealed lots of oil in the intake runners near the valves. FORD MUSTANG 302 CYLINDER HEADS Pre-Owned $177.50 classicautoresto (4,195) 100% or Best Offer +$199.05 shipping Sponsored ARP 154-4206 Black Ford New Boss 302 w/351C heads 12pt hsk In Stock Ready to Ship Best Deals Fast Shipping Brand New $250.99 partshawk (68,956) 99% List price: $367.99 32% off Buy It Now Free 4 day shipping Sponsored 165 cc Intake. Pair. Better compression then stock, better breathing then stock. Basically, the DZ 302 shared all the specs with the previous 365-horsepower 327, with the fuelie heads, the Duntov cam, an aluminum intake, and Holley carb. These are perfect for their intended use, the street. Years ago there was a six cylinder weight break for the late model classes at one of the local dirt tracks that I would frequent. Ford brought back the iconic 5.0L in the 2011 Mustang. While it only had .480-inch of lift, that duration would really allow the RPM to climb. While the tunnel port wasnt a complete success, thats how the Boss heads came to be. Cylinder Head. NOS 1969 1970 Mustang Boss 302 speedometer. Ford 260-289-302 Firing Order; Ford 351C 351M 400M Firing Order; Ford FE Firing Order; Ford 429 and 460 Firing Order; Chevy SB and BB Firing Order; That would probably have been the only intake available to work , at that time. Typically these are seen in three different versions as shown. Find Parts and Accessories Boss 302 aluminum heads KEYWORD and get Free Shipping on Orders Over $99 at Summit Racing! 045. Aluminum. But the springs they come with are for a hydraulic roller cam. stud-mounted roller rockers as the current Ford Racing 429 Cobra Jet heads, and the standard Cobra Jet intake and exhaust manifolds bolt right on. The 300 and the 240 are identical blocks,the heads are different and the 240 is basically a destroked 300 so it will rev a little higher. Crate Engine, 302 C.I.D. We learned on the first few pulls that we had too much carburetor with our 750 cfm Holley 4160 and too little camshaft. Having a hard time finding Boss 302 Heads online? . All Cleveland style heads including the BOSS has 1.73 to 1 ratio rockers. 58 cc Chamber. Looking at the graph, it looks like the DZ 302 actually outperforms the Boss 302 from 3,700 rpm until 5,800rpm. Ford's legendary racebred Boss 302 engine remains one of the most significant high-performance power plants in the company's history. 1.73:1 rockers, 522 lift 292 duration nets 420 HP at 6300. JavaScript is disabled. Australian car enthusiast with 30 years experience in the high performance industry. See it here: yes its ben done. . We'll send you raw engine tech articles, news, features, and videos every week from EngineLabs. . For those who consider swirl a detriment to producing power this is a positive thing. Always interested in how things work, he enjoys sharing his passion for automotive technology with the reader. While the Boss 302 was normally considered a 302 with 351 Cleveland heads, these canted-valve heads were used first on the Boss before the rest of the Cleveland was developed. It will have screw-in core plugs and a four-bolt main block if it is a Boss 302. Age Group: adult. Up front, upgraded upper and lower control arms fix some of the shortcomings of the original Ford bits, while out back, a Fays2 suspension Watt's link locates . Edelbrock Performer RPM Cylinder Heads - Ford 351C Custom Camshafts, Valvetrain, Valve Springs, Push Rods, Timing Sets www.flowtechinduction.com "Generations above them were never perfect. One thing I found particularly awesome about these heads is the spark plug holes and threads. Truth is, a factory original Boss 302 is happiest with a 600 to 650 cfm Holley. Building LS garbage? edelbrocks were my first finned aluminum heads for a flathead25 years agoand they were o. k. for a 239 or a 255, due to small combustion chambers. The TFS head looks much stronger than the Edelbrock version above 5,500 rpm, but the maximum differential is only 13 hp at 5,900 rpm. It used to be listed in the FRRP catalog. We apologize for the inconvenience Because the 302 Tunnel Port called for high revs in the 9,000 rpm range to make real power, racers scattered these engines all over racetracks across the country and left feeling defeated. Build your own custom newsletter with the content you love from EngineLabs, directly to your inbox, absolutely FREE! 2.02/1.60 in Valves. 58 cc Chamber. . high power capabilities. The GT-40 cylinder head was produced in cast iron and aluminum, available from Ford Motorsport SVO and Ford Racing. Cylinder heads are available fully assembled or as bare castings. You may also cruise the online auctions for a vintage 5.0L roller block (F1AZ-6010-B). So it can already be made to haul. Other than this the heads flow nicely on the street. Brand New. Recently, we posted an article in which Richard Holdener dyno tested the five-liter powerhouses put out by the Blue Oval and the General in the 1980s. Locate Boss 302 Heads on sale below with the biggest variety of Boss 302 Heads anywhere online. Classes? Don't know what the compression ratio would be with those pistons you mentioned but don't forget the HI-PO 289 produced 271 horses with 10.5 compression. There are plenty of them lying around used and new-old-stock. No more dyno there. The recommended spark plug for your typical application is the Champion 792 plug, gapped at. That tradition dates back to the companys founding in 1903. Required fields are marked *. Cloyes gears to replace the factory chain set-up and hand-built his own Accel BEI distributor by machining the housing ut of aluminum billet. The push-rods needed to be extended using a 2-piece design w/a small aluminum sleeve (that slides in the block) to join the 2 pushrods. However, Ford already had that architecture in its lineup, while Chevrolet did not. The Fora platform includes forum software by XenForo. This one appeared great at first use and for a couple of months. Fits on Dodge ramcharger, monaco, w100 series, sierra, pioneer, d300 pickup, d100 series, custom. . What I got was good, but the quality control person should not have let these go out the way they are. Compatible with Chevy Small Block 302/327/350/383/400 SBC 200cc Intake 68cc Angled Plug Aluminum Bare Cylinder Head $238.88 $ 238 . They have cast iron seats and guides (titanium valve compatible) and are set up for studs and guide plates. Assembled. The heads also required custom-length Comp Cams pushrods to compensate for the relocated valves. No stick hole up top. Are you looking for a set of entry-level street performance heads for your modern street rod, musclecar, or truck? 015 AND THE REST WERE. 69 Boss 302 Mustang & Cougar . There is no flat spot and these engines will pull from 2000 against any rival including a Windsor. More than 400 horses easy. I think I have seen afrermarket heads but cannot rememmber where. I thought the bolt pattern was the same, that is what helped to make the swap work. Combining with an iron block and aluminum heads, the 4.0L SOHC V6, made a substantial amount of more power than its predecessor, producing 210 horsepower at 5,250 RPM and 240 lb/ft of torque at 3,250 RPM. You will certainly feel that in the car. Jeff Speegle Come see us @ ConcoursMustang.com MCA Shelby Judge, SAAC & Team Shelby Judge (in no particular order . This head is intended for a flat-tappet camshaft, so it was outfitted with a small-diameter spring that might have limited its performance in the midrange slightly. As with our small-block Chevy head test, we will evaluate each of these small-block Ford cylinder heads using several different categories in addition to peak torque and horsepower. 3/1 . Especially for the price, I would buy them again in a heartbeat. There was dust and paper bits all over the keyboard and screen!! I have used them for over 35 years and never seen something like this. Above you see a casting with a D1ZE part number. which de-stroked it. The results of this test didnt really surprise me, except for one thing, reveals Holdener. Cleveland's Crown Jewel. Boss 302s did indeed have 1.73 ratio rockers from the factory.