Great performance didnt notice any quality issues or burred edges when they came in. If you used windsor heads its not a BOSS. The 68 F code had 10:1 compression and made 210 bhp. The block is a 1980 302 Winsor. 0:1 on blocks with a 3/16 base relief (stock bore and stroke). When you purchase through links on our site, we may earn an affiliate commission, which supports our community. And like the others mention, it was C.J. Cylinder heads casting ID decode for 260 289 302 351 390 406 427 428 429 460FE Boss Shelby. One side opted for mild lift and more duration, and the other went for more lift and milder duration. It came with aluminum heads that were way too big for the cam and my use. Would modifying the heads bring down the value of the heads? The intake ports flow 382 cfm at .750-inch of lift. So the induction system is kind of a toss-up. Not too much carb for this engine. i drank a bottle of 10,000 rpm and thode a rod !!! Required fields are marked *. The Ford Racing X307 head is not the casting that comes on the Boss 302 crate engine, but its affordable price made it a natural choice for this test. I would guess Im somewhere around 375HP @ the flywheel in this build. can I send the stud kit back? loading. Sign up for a free trial to MotorTrend+ today and start watching every episode of Engine Masters, plus much more! 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. Build your own custom newsletter with the content you love from EngineLabs, directly to your inbox, absolutely FREE! Australian car enthusiast with 30 years experience in the high performance industry. The DZ 302 has a reputation for being a high-RPM screamer, and the camshaft is definitely part of that. These lightweight aluminum heads bolt up to your small block Ford and feature 190cc intake/60cc exhaust runners, 60cc combustion chambers, and 2. All rights reserved. Neither was really that streetable but of the two the 70 had the smaller valves whick helped a little with the low rpm feel. These heads feature A356 aluminum castings that are heat-treated to T-6 specs for superior casting strength and quality. I never did own a Boss 302, but I was around them when they were new.I have had lots of 351C. Cleveland's Crown Jewel. 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. I think Im in love, lol!!. When you shop through links on our site, we may earn an affiliate commission. For the Boss 351, the entire Cleveland engine was used instead of simply the heads. Edelbrock E-Street cylinder heads are just the ticket. I first installed an oil trap in the PVC thinking something went wrong with the piston rings. This is where you must spend the money. were designed to be 1-for-1 replacements for Boss 351 cylinder heads. . Here you can see exactly where each engine outshined the other, and by how much. Truth is, a factory original Boss 302 is happiest with a 600 to 650 cfm Holley. Best for 302-351 cubic inch engines. As I recall from articles way back, this is an expensive process. Parts made from tooling for the cancelled 1971 BOSS 302 were used for service. 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. Ford has always been a car company that dared to go where no automaker had ever gone before. I KNOW FROM EXPERIENCE. second time I have been disappointed with Edelbrock. 98 sold Better than fighting with iron cylinder heads. it boots up ok but not as fast as my other i5 laptop. one of the hotrod magazines did an article on the combo back in the 70's. AIR FLOW RESEARCH 1402 SBF 165cc Alum Heads Renegade Street 58cc. The heads are Cleveland heads. Bob Perkins(WI) located it and restored it to original shape and build special plexiglass trailer for it to display. Raced and owned quite a few Boss 302s. These features improve an engines efficiency, resulting in more horsepower and torque and improved mileage potential. 70 Boss 302 intake 2.19 / exhaust 1.71. Both engines are solid flat tappet cams, and the Chevy especially responded to changes in the lash. Perfect fitment, good quality heads on a budget! In 1970 the Boss 302 was a Camaro killer, it could go 0-60 mph in 6.0 seconds. The BOSS head was functionally identical to the 351C 4V head. The brute 427 FE Series big block that won Le Mans also reigned supreme in limited production 1964 Thunderbolt Fairlanes in NHRA competition. 4V. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Enter Fords development of an all-new 351ci engine with poly-angle valve heads and tight-fisted wedge heads destined for a 1970 introduction. 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. 165 cc Intake. The Edelbrock E-Street cylinder heads offer American made quality and affordable performance. Flat cylinder heads have large water capacity and excellent breathing characteristics. The Fora platform includes forum software by XenForo. Roush? This new design offers a 25-50 HP increase over current Cobra Jet heads, depending upon displacement and camshaft. Edelbrock E-Street cylinder heads are ideal for entry level street performance engines. And the reality is, they did, in modified trim the way they were raced in the Trans-Am series. 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. You may also cruise the online auctions for a vintage 5.0L roller block (F1AZ-6010-B). The cylinder head is bolted to the engine block and sits above the pistons. It had to sneak the GTO in under the radar of upper management. The Ford is specd out at 228 degrees at .050-inch lift, but lift was a different matter. Classes? The winner in this evaluation is almost always the least-expensive head just because of the way the math formula works. Because of the pent-roof design of the heads, the Boss also had forged pop-up pistons to achieve the desired 10.5:1 compression ratio. Actually, everything about these heads helps the little 302. Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! THE NEXT ISSUE IS THE RECOMMENDED INTAKE GASKET FEL-PRO 1262. At less than $950 for the pair, these Edelbrock heads may be the best bang-for-the-buck investment of all the Ford heads in this test. 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. for use w/ Special Intake. 88 DNA Motoring LEPOW-038 Aluminum Bare Angled Cylinder Head [For Chevy SBC 302/327/350/383/400] 3 High-Quality Details With the Edelbrock part #7129 Performer RPM E-Boss 302 intake manifold, you can build a mock Boss engine by using a standard 302 block and Edelbrock Performer RPM Cleveland cylinder heads #61699. This conversion was well documented and fairly popular when aftermarket heads were not available. On episode 19 of Engine Masters, David Freiburger explains cam lift, duration, lobe separation angle, and installed centerline. What looks like parting lines are huge in some places, one exh runner has a stick of Aluminum protruding into the runner (pic 1). And really, its a difference in the philosophy behind these two motors. This makes it easy to torque and lower cost for better aftermaket bolts and studs. Back in the day, there was all kinds of speculation that they made more than 400 horsepower. The heads are a direct replacement for previous Twisted Wedge heads and work with all Twisted Wedge specific pistons. 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. The Boss was topped off with an original aluminum. I installed these on a factory 302 HO in my 94 Mustang. The TFS heads appeared to be the big dog in the room when it came time for testing. This is the 2012-2013 BOSS 302 cylinder head casting, M-6050-M50 and M-6049-M50 (shown), which really is a different casting of an improved 356 aluminum alloy (versus 319 with base Coyote heads) with CNC-machined ports and chambers. Valves 2.02 / 1.55" . It ran a regular head that was tweaked (either before the slicing or class requirement). In the 1960s, Ford was an outspoken car company, much as Pontiac Division was within General Motors. Though peak horsepower is a quick reference point for evaluation, we prefer to use average power in these comparisons because it always produces a better picture of overall performance. But, I just came across this website and happened to ask about B. Sizemor's 6. All Cleveland style heads including the BOSS has 1.73 to 1 ratio rockers. Assembled. Luckily I had the tools to put them back on but this could have been a issue and made them not bolt on heads. 60 exhaust valves. Alum. 18 Ft/Lbs - Aluminum Heads. 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. Part of the difference in valve lift numbers between the two is the rocker arm ratios used from the factory. What? i knew a guy that put a set on his 65 shelby. . FORD and Mustang Cylinder Heads (6090) 5752143: 59 332 352 . E-Street cylinder heads feature as-cast ports and are designed for entry-level street performance applications operating in the idle-to-5500 rpm range. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. I have a Eldabrock Performer intake,msd distributor and 6al box and a 61mm bbk throttle body. Yes you can bolt the 351C heads to a 289/302/351W block. Opens in a new window or tab. 1 on Pg 2 instructs the used to drill 3 holes if a 400 block is used. . Its not a good time to be building a performance engine. Pair. But for the rest of us, choosing a cylinder head might be a complex algorithm of price, power, brand loyalty, ease of installation, head bolt size, and maybe even shoe size if you're that compulsive. pulled heads out of box, one head was in very nice shape, ready for service. The DZ 302 in the Z/28 was a natural marketplace competitor to the Boss 302 from Ford. The Edelbrock Flathead Cylinder Head is made of A356 aluminum T-6 tempered cylinder head. Meaning, their AQL is very low. Where in the world did you come up with the "347s are not reliable"?. The drag strip in my area doesn't have any classes. Ford's original Boss 302 engine was only produced for two years (1969 and 1970), but it was so cool it's understandable why the little V-8 has gained such an . Exhausts have only a. 125 of gap at the front and rear ends and you are running a blower or a turbo then I would suggest making some spacers to take up the gap on the ends because anything over. Both 1969 and 1970 302 BOSS engines will run great with a properly tuned 750 Holley. Chevy used higher compression and lots of camshaft, combined with mild cylinder heads. That puts lift over .500 inch .514 according to our calculations, minus the lash, Holdener reveals. I SENT THEM RIGHT BACK. Generator stud kit for 1938-48, use #8506. I did hear somewhere that there was a fellow using the late model chev heads and cutting those up and making a crossflow head for a 300 six..That would not be too hard to check out if a fellow had a 300 six block and some access to some of the late chev heads I think the LS6 heads..It took three of the heads to make one and since they are aluminum that resolves some of the fabrication issues..Is it true well I dunno for sure but it may be worth a looksee to see if it may work..
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