They topped a 302 Windsor with the Cleveland -style heads, making the first Clevor. Edelbrock E-Street cylinder heads are just the ticket. 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. Be the first to rate this post. Edelbrock Performance Cylinder heads are manufactured of A356 aluminum and made in the USA for AMC, Buick, Chevy, Chrysler, Ford, Oldsmobile, & Pontiac engines. He stated he spent over $10,000 back then. Topping off the Boss 302 was a specially designed aluminum dual-plane intake manifold mounting a 780-CFM Holley four-barrel carburetor, covered by a closed air cleaner assembly with a single inlet snorkel and a ribbed, domed lid that was also chrome-plated. Great performance didnt notice any quality issues or burred edges when they came in. To clear up a few questions, the combustion chambers are 60cc, not 64cc. . The BOSS 302s biggest shortcoming is port sizing, which is something Ford has rarely been able to get right. 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. Cross Boss 302 Mustang off highway use. They show to be suitable for the 221-302 Ford Small Block. The heads alone are excellent fit and quality. 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. These all-cast heads are designed for hydraulic flat tappet and hydraulic roller cam engines with hefty intake runners, stainless steel valves, Viton seals, and dual springs. 302/351 X2 Head. Comparing the cylinder heads on paper, using data collected by Holdener for a previous article, the Boss heads clearly come out ahead. Huge difference in quality. Greg has spent eighteen years and counting in automotive publishing, with most of his work having a very technical focus. Its main function is to seal the combustion chamber and provide a surface for the intake and exhaust valves. SB Ford WP Man O'War iron block/Man O'War aluminum head Head Bolt Kit. Learn how your comment data is processed. 20 Best Cycling Shorts For Long Distance (2023 Updated), 20 Best Cylinder Lock For Storage Unit (2023 Updated), 20 Best Treats For Guinea Pigs (2023 Updated), 20 Best Treats For Goldendoodle Puppy (2023 Updated), 20 Best Treats For Golden Retrievers (2023 Updated), 20 Best Treats For German Shepherd (2023 Updated), 1953 Ford Customline 8 Cylinders 3.9L 2BL. 1969 - C9ZE-6090-A or C We did this to expand the scale to show the differences in power near peak horsepower. A big head and lots of airflow means lots of power. Ford Racing teamed up with Jon Kaase to redesign their 429 Cobra Jet cylinder heads, and the results are these Super Cobra Jet heads. JavaScript is disabled. The intake valves all have. Once I pick the heads I was going to find a good cam for daily driving/ performance. 035 (which I am using). Cylinder Head. Batten cyl heads was instrumental in developing the high port exhaust for the Dyno Dons and Bob G's and Jack Roushes. Im sorry guys but you somehow missed something there are boss 302s out there cranking out way more than what you guys are claiming. This is my first engine build, let me know if Im doing it all wrong. It would make a nice high rpm engine that was pretty soft on the lower end where you spend the most time. Hate to tell you this but a BOSS 302 has Cleveland type heads. Ford engineers took the new 351 cylinder head and modified it to work with the Tunnel Port block. Weve got 302 fords with gt40 3 bar heads making over 500 hp. I think it was Bruce Sizemore that ran an H/MP Maverick that held the class record for a while during the 70s. 030 shim. The BOSS 302 heads are known as "Cleveland style" heads as they are based on the head designed for the 351 Cleveland engine. Index your plugs on these engines. Not all that long ago, the small-block fan's only choice for Ford cylinder heads was the classic 351W Ford heads swap on a 302. That means 305 maximum cubic inches. There was a guy named CJ Batten who would cut up 3 boss 302 heads and put them on a 300 IL6.The one I remember was on in a rail type dragster. These Ford heads tied with the Edelbrock heads for third place in average torque and were extremely close to the RHS head's second-place power level. I am through with their products. 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. Meaning, their AQL is very low. 185 cc Intake. 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 runners are as cast and a bit rough. They used the 3 center sections of the heads. 1970 Looking at the graph, it looks like the DZ 302 actually outperforms the Boss 302 from 3,700 rpm until 5,800rpm. Twisted Wedge and Canted valve (TFS and C302b) in aluminum promote even better performance. They'll work but have you got the Boss heads? Try the DZ 302 and see what happens! many cried in the various comments sections, to which the Ford faithful replied, Maybe against a BOSS 302! Well, Holdener was reading those comments, just like we were. The RHS headsproduced the next-closest average horsepower and torque, with the Edelbrock and Ford heads very close behind. The darned thing was rabid dog fast. This engine was built in the 80s by someone with way to much money. sbf 302 aluminum cylinder heads. They are also cast with combustion However, there are a few notable differences between the Coyote in the F-150 and the Coyote in the Mustang. Revised cooling system passageways Siamese bore with drilled coolant crossover holes (Except on M-6010-B302BB ) Increased bulkhead material The odds of you building a vintage Ford BOSS 302 engine are slim because Ford built so few and so many are already spoken for. What I got was good, but the quality control person should not have let these go out the way they are. 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. Hack said: The size of 302 valves has varied a little in some performance versions over the years. Autozone has a great price on these heads. It had to sneak the GTO in under the radar of upper management. Some of the guys were running ford 300 six cylinders with good success. Think of Ford as a free-spirited car company with a rich history, driven by ego, that took big risks much as it is doing today with electric vehicles. Age Group: adult. The Ford roller rockers use a fulcrum base and a 5/16-inch bolt to attach the rockers to the head. For the 1968 Trans Am season, Ford took the 302 cubic inch Tunnel Port out there in search of victory. would love to return this old jalopy back!!!. Pair. Much of this gain over the stock 345-hp Boss 302 rating can be attributed to Westech's lower 140-degree engine coolant test procedure and open dyno headers. Seems to me that if you get the right kit (ie correct wrist pin centering, rod length, etc), you should have no problem.. aliases: Bossssssman, bosscars, old fart, chat dawg, hey you. and if you want to use a high-lift cam or supercharger; thats no problem, either. Because they didnt allow destroking [of an existing engine design] initially, both companies had to build actual displacements of five liters, explains Holdener. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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. Other than that it was OK. But the springs they come with are for a hydraulic roller cam. Budget iron can run $1195.00 for an easy 500 + hp but any more needs more valve area. For use on pre-pollution controlled vehicles only. can I send the stud kit back? The store will not work correctly in the case when cookies are disabled. The BOSS 302 Registry is not affiliated with the Ford Motor Company. It's all bracket racing. As you can see from these numbers, the Cleveland-style Boss 302 cylinder heads offer significantly more airflow at each valve opening point over the DZ 302's fuelie heads. 030 AND 2 OF THEM WERE. It's also worth mentioning that due to a variety of scheduling and deadline pressures, the offerings from Dart and Pro Comp Electronics, both of which fit within our price prerequisite, didn't make the test. Best for 302-351 cubic inch engines. They pull much harder through the midrange than the 351W heads they replaced on my 302 Ford. 02 intake/1. Swirl Remarks CHW's Modified Boss 302 head shows the elimination of a swirl effect at lifts below .600 inches. . The Cleveland style head featured a staggered, canted valve arrangement. 154-3702: SB Ford 302W 12pt Head Bolt Kit. Both had dual-plane high-rise intakes and big Holley carbs. It was what the SCCA mandated for street homologation. That may or may not make your ultimate choice any easier, but if so, you can thank us later. So now, we have a pair of legends, being compared on the dyno. 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Well I have a 1977 copy of Pop. The heads also required custom-length Comp Cams pushrods to compensate for the relocated valves.