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A borescope down the intake revealed lots of oil in the intake runners near the valves. What looks like parting lines are huge in some places, one exh runner has a stick of Aluminum protruding into the runner (pic 1). Though I rated the overall part as good, the areas that really count are just average. The cylinder head also contains the spark plug and fuel injector(s). I have a Eldabrock Performer intake,msd distributor and 6al box and a 61mm bbk throttle body. We evaluated each head on the flow bench, average overall power, and we calculated average horsepower-per-dollar. The Edelbrock 351C head shows a controlled "swirl ramp" that comes on lightly at 100 RPMs starting at .450" lift and increases steadily to 2000 RPMs at .600" lift. 1970 World contributed the lone cast-iron head to our Ford small-block test. 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. Cylinder heads are available fully assembled or as bare castings. If it is, then you know what you need to do. I had 90 runs on an original Boss 302 in a 70 Mustang. Ford Racing teamed up with Jon Kaase to redesign their 429 Cobra Jet cylinder heads, and the results are these Super Cobra Jet heads. The result of this engineering effort was the BOSS 302 engine, which became the Trans Am mill of choice for 1969-70 and beyond in SCCA competition. PRO1 170 Ford Tech Sheet - H30. Im extremely disappointed in this blog.. 10 years????? 18 Ft/Lbs - Aluminum Heads. Purchased a long block on CL. Edelbrock 5025: Cylinder Heads, E-Street, Aluminum, Assembled, 60cc Chamber, 170cc Intake Runner, Ford, 289, 302, 351W, Pair - Are you looking for a set of entry-level street performance heads for your modern street rod, muscle car, or truck? Is it the 69 or 70 Boss 302 head that's more streetable? Great top end with these heads also. and if you want to use a high-lift cam or supercharger; thats no problem, either. We certainly don't want to ignore the peak numbers, and that's where the TFS Twisted Wedge heads really earned the spotlight. So get comfortable, slip on your Ford-colored glasses, and hang on. We'd love to test 'em all, but we decided to line up as many performance small-block Windsor Ford heads as we could find, as long as they were available complete for less than $1,350 for the pair. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. the second head had not been full deburred from the milling process. 1970 Fastback (to be finished outside as a Boss 302 tribute), thanks for all the responces! At idle when vacuum is the highest the valve guides leak lots of oil into the intake. We apologize for the inconvenience Its not a good time to be building a performance engine. 1 on Pg 2 instructs the used to drill 3 holes if a 400 block is used. And really, its a difference in the philosophy behind these two motors. Renegade Street. Best heads for the price. Enter Fords development of an all-new 351ci engine with poly-angle valve heads and tight-fisted wedge heads destined for a 1970 introduction. However, this time it boasted 412 Horsepower and 390 lb-ft Torque! While it only had .480-inch of lift, that duration would really allow the RPM to climb. Using the native mouse is awkward. 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 302s fuelie heads. Ford has always been a car company that dared to go where no automaker had ever gone before. 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. 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. These heads feature A356 aluminum castings that are heat-treated to T-6 specs for superior casting strength and quality. The combustion chambers are filled with a 2.150-inch, 7mm-stem titanium intake valve, and a 1.60-inch, 7mm-stem titanium exhaust valve. Won't work with the 289 stroke. Dells are ok computers. Great performance didnt notice any quality issues or burred edges when they came in. Just my thought. Alum. Batten of Romulus, Mich who did the furnance-blazed heads. Buy It Now +C $186.98 shipping estimate. We should also mention that although we didn't test a stock iron casting, it should be clear that even the heads on the lower end of our test would still be an improvement over stock factory castings. I have certificate for it. 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. Its all a win,win. See it here: yes its ben done. The Twisted Wedge heads also had the strongest horsepower curve above 4,000 rpm of all the heads tested. . Production casting part numbers: Cleveland's Crown Jewel. . Be the first to rate this post. Wait 1.6 rockers? What I got was good, but the quality control person should not have let these go out the way they are. 289 & 302 (Except Boss 302), Dual Plane [Natural] (27) $207.99. Required fields are marked *. Stroking an engine is not going to reduce your engine rpm. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. Fords great success with its powerful V8 engines is legendary. How can you call it racing if you're putting the brakes on before the finish line? The Boss used a mild camshaft, mild compression, and lots of head flow, Holdener says. Today's small-block Ford street engine builder has it easy. Reworking Cleveland heads I think would require reducing the size of some of the water passages and I unsure of the block clearance . Age Group: adult. Yes you can bolt the 351C heads to a 289/302/351W block. Max effort class rule stuff runs over $2K. I was going to have my reconnecting rods reconditioned with 5/16 arp bolts. This conversion was well documented and fairly popular when aftermarket heads were not available. Swirl Remarks CHW's Modified Boss 302 head shows the elimination of a swirl effect at lifts below .600 inches. The Ford heads did well during the testing, making a peak of 362 hp. These heads are coated with assembly lube out of the box. You MUST flycut the valve reliefs on the pistons larger if using stock pistons. Im just hoping the new Edelbrock intake that arrived yesterday is better than these. I figured the Boss would make peak power. The DZ 302 in the Z/28 was a natural marketplace competitor to the Boss 302 from Ford. 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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. You can see how the valves are canted in this picture. The .10 difference in bore spacing( but the bolt pattern is the same square four as the smallblock) makes me think 3. Have you got the intake? Cylinder Head. Both engines feature a four-inch bore and three-inch stroke, so there are no excuses available for either side regarding minor discrepancies in displacement. The Boss 302 and 351C-4V head casting are the same except for a minor difference in water passages. The Mustang 5.0L Coyote engine has evolved into the Boss 302, VooDoo 5.2L, and the Predator 5.2L. If you used windsor heads its not a BOSS. The head bolts used on a Boss 302 were a flanged-style head bolt. The modern combustion chamber designs improve the combustion process and larger than stock intake and exhaust ports move more air through your engine for improve efficiency. The TFS heads appeared to be the big dog in the room when it came time for testing. THE FIRST SET I PURCHASED WERE LIKE THIS AND I INSTALLED WITHOUT CHECKING THEM. Find Parts and Accessories Boss 302 aluminum heads KEYWORD and get Free Shipping on Orders Over $99 at Summit Racing! There are still 6 other steam holes not present in the 5073 head that are in the 350 block circa 1972. The finishing order for peak torque realigned slightly, with TFS out front, RHS coming in a strong second, and Edelbrock and Ford tied for third. No drilling is required since it appears they updated the manufacturing process to eliminate this need. Its biggest weakness may be the price. legend . There are many different types of cylinder heads for Ford 302 engines, so it is difficult to make a definitive conclusion about them. One side opted for mild lift and more duration, and the other went for more lift and milder duration. 98 sold To complete the Boss, we added an Edelbrock Performer RPM intake, a Holley 750-cfm, mechanical-secondary HP carb, MSD distributor, and a set of open dyno exhaust headers, and we were ready to rumble. The heads are Cleveland heads. I was building that garbage in 2nd grade. Inline and < 15* valve angle such as World Products Man O' War 10* heads promote very good performance. 1.290 in Spring. These are perfect for a street build and the price is outstanding!!. instead of 50 oz. I have not been able to specifically identify because the stamp on corner does not mach up with what it should be. Luckily I had the tools to put them back on but this could have been a issue and made them not bolt on heads. I have used them for over 35 years and never seen something like this. Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4in. A guy near here used the advice on the link below, starting with a 67 289 2V engine. Thx. WITH THE STIFFER SPRINGS I REALIZED THE PEDESTAL MOUNT ROCKERS WOULD MOST LIKE FAIL SO I MACHINED THE PEDESTAL PADS, DRILLED AND TAPPED AND INSTALLED HELI COILS FOR ROCKER STUDS. Edelbrock E-Street cylinder heads are ideal for entry level street performance engines. The Tech was nonchalant about this and stated these are a lower end part. These heads are always perfect, but could use a little bowl work thanks team SUMMIT. 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. I bought an external mouse/keyboard because the distance from the keyboard and mouse to the edge of the laptop are a bit far for my small hands. Flashing in ports was unacceptable. When I set the carb I get a bouncing vacum needle at idle, Ive been told thats a sign of a sticking valve. The results of this test didnt really surprise me, except for one thing, reveals Holdener. And, he decided to make that happen. Are you looking for a set of entry-level street performance heads for your modern street rod, musclecar, or truck? Having a hard time finding Boss 302 Heads online? 154-3701: SB Ford Boss 302 12pt Head Bolt Kit. Edelbrock heads are available in two different versions, with either 1.94- or 2.02-inch intake valves. 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. For a better experience, please enable JavaScript in your browser before proceeding. The less you know the more you need vacuum secondarys. 2. my signature linesnot really directed at anyone in particular.. FLO-TEK Performance cylinder heads feature as-cast ports and are designed for entry-level street performance applications operating in the idle-to-5500 rpm range. IF YOU DO THIS BE SURE TO USE PERMATEX #2 ON THE INTAKE STUDS. Needless to say the head kicked ***. We started FORD Drag Club at Horn-Williams Ford in Dallas,Tx. Same transmission, run a 351W flywheel/flexplate (same as a C). However, Ford already had that architecture in its lineup, while Chevrolet did not. My fault for not setting the intake on the engine to check my end gaps. Edelbrock E-Street cylinder heads are ideal for entry level street performance engines. from United States. Combine Edelbrock quality with excellent power and a highly competitive price, and the E-Street Edelbrock heads strike us as an excellent choice. Small Block Ford. They cut the center two chambers from three Boss 302 heads then welded them together to form an inline six head that bolted on a 300 block! As I recall from articles way back, this is an expensive process. writing. 1.290 in Spring. The Fora platform includes forum software by XenForo. The RHS heads come out of the box with a very nice-looking casting, and back that image up with respectable performance. The Edelbrock E-Street cylinder heads offer American made quality and affordable performance. Whenever youre running a flat tappet cam, always use a zinc additive, Building Classic Ford 351 Cleveland Power. Condition does not matter! installed the heads on a 1978 460 bored out .060 over went from 500 hp to 551 hp @4900 rpm on a dyno 8/9/19. When we tore apart the first head it was full of shavings and one of intake valves was super tight and one of the exhaust valves was bent w/. You'll notice that we attenuated the horsepower graph to include just the power curve between 4,000 and 6,200 rpm. the engine was called a "boss 289" not a clevor, a clevor was a 351W with 351C heads and a custom intake. Ford engineers took the new 351 cylinder head and modified it to work with the Tunnel Port block. On episode 19 of Engine Masters, David Freiburger explains cam lift, duration, lobe separation angle, and installed centerline. This page last updated: February 3, 2022. The recommended spark plug for your typical application is the Champion 792 plug, gapped at. Other than that it was OK. I remember reading about it in some magazine and I saw it on another forum recently. What type of heads fit a Boss 302 block? What I have found out so far, the engine runs. Pair. 60 exhaust valves. The heads alone are excellent fit and quality. 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; Valves 2.02 / 1.55" . Twisted Wedge and Canted valve (TFS and C302b) in aluminum promote even better performance. 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. i drank a bottle of 10,000 rpm and thode a rod !!! The BOSS 302 engine could use better cylinder heads with right-size port and valve sizing in a set of Trick Flow cylinder heads and a more compatible roller mechanical camshaft. 1-330-630-1555 1-888-841-6556. . Put on a 351w in a 1979 Tbird. detroit metro auto parts "302" - craigslist . The advantage was better flow because the intake was on one side and the exhaust was on the other. 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. BluePrint Engines stand in front of the class, offering both performance and cost-conscious enthusiasts a powerful alternativeMuscle Series cylinder heads. It was honestly a guess on my part and the Tech had no additional information or opinion to offer. I think it was Bruce Sizemore that ran an H/MP Maverick that held the class record for a while during the 70s. They will outperform many of the average aluminum heads. unfortunately I missed the return window due to illness. It was 351C heads, 3 of them, cut up into 6 pieces, then furnanced blazed. Cover Autolite 4V casting D0ZX9B48-3 . reach with flat gasket seat. 154-3702: SB Ford 302W 12pt Head Bolt Kit. Generator stud kit for 1938-48; use #8506. we all have our shortcomings. You wont find heads of this quality at a better price anywhere. I HAD TO CHANGE OUT THE SPRINGS FOR ONES WITH MORE PRESSURE DUE TO VALVE FLOAT AND I AM ONLY RUNNING AN E303 CAM. The power numbers are so close that if we had tested these heads in a typical street car, it's doubtful we would have seen much of a difference in performance among the middle four heads. There was dust and paper bits all over the keyboard and screen!! Both companies decided to develop a 302 combination via the previously mentioned four-inch bore and three-inch stroke. Feb 19, 2016. The 302 Tunnel Port already had a terrific four-bolt main block and steel crank along with beefed up C3AE 289 rods and special pistons designed for the Tunnel Port heads. NOS 1969 1970 Mustang Boss 302 speedometer. For high-performance's street and competition, our dual-plane design makes outstanding power from 1500 to 6500 rpm. We'll squeeze all of this into these few short pages, which means we have a long way to go and a short time to get there. 1.90/1.60 in Valves. Primarily, the 5.0L V8 in the F-150 received a lower compression ratio (10.5:1), intake camshafts with less duration, cast iron exhaust manifolds, and revised cylinder . Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! Once I pick the heads I was going to find a good cam for daily driving/ performance. 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. You are better off buying model 5023 with 1. Great article is there a video available ? I SENT THEM RIGHT BACK. second time I have been disappointed with Edelbrock. 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. Intake - 2.23 inches Get big power on a small budget with BluePrint Muscle Series cylinder heads! Boss 302 - 1970 Boss. They had to combine a four-inch bore from a 327 block with the three-inch stroke from the 283, Holdener elaborates. Rugged, ribbed internally and externally, with a large water capacity and excellent breathing characteristics. I wanted to built a great runing, mild street motor around a stock sbf 302 short block. The DZ 302 has a reputation for being a high-RPM screamer, and the camshaft is definitely part of that. 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. . LOOKS AND PERFORMED GREAT. Save my name, email, and website in this browser for the next time I comment. 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. Perfect fitment, good quality heads on a budget! Because they didnt allow destroking [of an existing engine design] initially, both companies had to build actual displacements of five liters, explains Holdener. high power capabilities. Ford New Boss 302 w/351C HDS Hex Head Stud Kit. This is my first engine build, let me know if Im doing it all wrong. 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. He used a correct Duntov camshaft and set the lash a little tighter than the original spec, at .020-inch. Raced and owned quite a few Boss 302s. It's all bracket racing. Other than this the heads flow nicely on the street. Does anyone remember the six cylinder heads they made for Bruce Sizemore. Ive had several other brands, but HP has been the best. Still have lots of racing Boss and Hipo parts. However, there are a few notable differences between the Coyote in the F-150 and the Coyote in the Mustang. 302 (may have been used on late 68 model year) 4V . I was trying to find a set of heads that will produce 300ish hp. Junk ass Chevrolet stroker engines.puleeeeeze. The 302 has a 9:1 compression ratio, while the 347 and 363 have 9.6:1 and 10.2:1, respectively. If youre using stock pistons, get the version of these heads with the smaller intake valves (Part #5023). one of the hotrod magazines did an article on the combo back in the 70's. The Cleveland heads can fit a 302 with the appropriate water passage mods and shouldered bolts to compensate for the bolt hole difference. However, it also led to a lot of upset Bowtie fans for some reason. Expensive mistake. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. E7 heads use 1.78 / 1.48 just like the 60s stuff. BOSS Cars Nationals 2005 - BOSS Cars Reunited. Also, the visual aesthetic is pretty plain, and the laptop doesnt have a sleek feel to it. Sizemore, formerly of Preperation H fame, did considerable valvetrain developement and terrorized the former checvvy stronghold of I and J/Gas. Assembled. 040 roller short block A little lope at idle but it pulls everywhere in the rpm range. In the 1960s, Ford was an outspoken car company, much as Pontiac Division was within General Motors. it still has the vista 7 sticker on the palm rest area. All Rights Reserved. So now, we have a pair of legends, being compared on the dyno. The Cleveland style head featured a staggered, canted valve arrangement. Parts made from tooling for the cancelled 1971 BOSS 302 were used for service. RHS shipped the heads with what should have been a sufficient single 1.460-inch-diameter valvespring, but the horsepower graph reveals that above 5,800 rpm the power trailed off, leading us to think that perhaps with a better spring this head could have carried the power out beyond 6,000 rpm, which would have improved its peak horsepower number. The heads offered an excellent midrange power curve, behind only the Twisted Wedge casting between 4,000 and 5,500 rpm. Edlebrock is one of the few companies making great performance parts for small block Fords. which de-stroked it. Edelbrock aluminum 2V cylinder heads with a mild camshaft upgrade top its stock Boss 302 block, while a Tremec TKO five-speed gearbox sits in place of the factory toploader four-speed. . Exhaust - 1.72 inches. That's what the TFS Twisted Wedge heads did here. Original aluminum Boss 302 valve cover brackets for the spark . We tried this formula to see what our basically stock BOSS 302 would do. Better compression then stock, better breathing then stock. Ford had and did a great job with Ford Motorsports programs which we were in . To minimize the grief of doing the math yourself, we averaged the horsepower between 3,000 and 6,000 rpm, then divided that into the cost of a pair of heads. 030 shim. Great option. This is the Head Bolt Torque Sequence (Pattern) for Ford's small block. Exhausts have only a. But there is absolutely something else wrong. It didnt conform to corporate protocol and invented the muscle car in its 1964 GTO. You may also cruise the online auctions for a vintage 5.0L roller block (F1AZ-6010-B). I really liked my 69 428 CJ. 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 . But as others have mentioned there are modifications that must be done to make it work. 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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. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. Boss 302s did indeed have 1.73 ratio rockers from the factory. The holes are also there in a 350 block and Felpro gasket as well as the 5073 head. 154-4207: Ford Racing Aluminum Valve Covers, Part # M-6582-Z351, SS, 12pt . The rocker studs are 7/16, not 3/8. "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. would love to return this old jalopy back!!!. The Boss 302 takes the Mustang GT's suspension and adds higher-rate coil springs, stiffer bushings, and a larger diameter rear stabilizer bar.