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165 cc Intake. So the induction system is kind of a toss-up. . Assembled. Opens in a new window or tab. So it can already be made to haul. The completed head is also wider so push-rod holes need to be cut-out on the block side, then sealed with "o" rings, etc. The "civilian" Boss 302 engine had a 4 bolt main block with screw-in freeze plugs and a forged steel crank. The Twisted Wedge heads also had the strongest horsepower curve above 4,000 rpm of all the heads tested. Because they didnt allow destroking [of an existing engine design] initially, both companies had to build actual displacements of five liters, explains Holdener. Thanks to all who helped us get here. Tell ya what ,leave the ford enginrs to the ford guys, and you keep playing with that some ole cookie cutter bowtie garbage youre so used to. I first installed an oil trap in the PVC thinking something went wrong with the piston rings. The DZ 302 has a reputation for being a high-RPM screamer, and the camshaft is definitely part of that. However, its always fun to think about building one or even erecting one from scratch, which you can do with a Ford Performance BOSS block (M-6010-BOSS302) and Cleveland heads. They'll work but have you got the Boss heads? I am building a budget 440 RV motor that should be a monster street tire smoker for under $3000. Even the stock cam should peek higher than 5500 rpm. All Rights Reserved. For Use w/289/302/351 Windsor-Style Engines. If you used windsor heads its not a BOSS. No votes so far! Age Group: adult. I think the higher RPM one had larger valvesand ports, right? Renegade Street. And, he decided to make that happen. Other than this the heads flow nicely on the street. BOSS Cars Nationals 2005 - BOSS Cars Reunited. Put on a 351w in a 1979 Tbird. For what the (complete) Boss heads and a intake will run seems you would be better off just going with a good set of after market heads. Both engines are solid flat tappet cams, and the Chevy especially responded to changes in the lash. 030 shim. Ever wonder what those camshaft specification numbers really mean and how they affect engine performance? Not even close to what I thought I should be getting in a brand new set of heads. Im not sure what has happened to Edelbrock, but their quality control sucks. They had to combine a four-inch bore from a 327 block with the three-inch stroke from the 283, Holdener elaborates. These ford flathead cylinder heads feature original edelbrock script logo design for fords and mercurys. But, I just came across this website and happened to ask about B. Sizemor's 6. Build your own custom newsletter with the content you love from EngineLabs, directly to your inbox, absolutely FREE! Small Block Ford. I was going to have my reconnecting rods reconditioned with 5/16 arp bolts. This is my first engine build, let me know if Im doing it all wrong. Twisted Wedge and Canted valve (TFS and C302b) in aluminum promote even better performance. A tad shorter then a 351W but a little wider due to the size of the heads. Their modern combustion chamber design helps to improve the combustion process and their larger-than-stock intake and exhaust ports help to move more air through your engine. 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. Cleveland's Crown Jewel. reach with flat gasket seat. For a better experience, please enable JavaScript in your browser before proceeding. Intake - 2.23 inches What type of heads fit a Boss 302 block? Thesecret to a long life stroker is to add wieght to the crank so you can exterally balance @ 28 oz. 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. Classes? Other Intakes >> Application. Both these motors were factory-rated at the same 290 horsepower, but that number is suspect, says Holdener. Wait 1.6 rockers? Batten of Romulus, Mich who did the furnance-blazed heads. 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. These are certainly worthy of attention at this excellent price. Moving to the Blue Oval, we see that they went with a milder profile. Flashing in ports was unacceptable. We discovered this was a 1969-70 BOSS 302 head modified for use on a 351C. Dimensions in Inches (LxWxH): 24.1 x 24.1 x 8.7. These are perfect for their intended use, the street. Bought these and compared to the other (PC). Flat cylinder heads have large water capacity and excellent breathing characteristics. Ive had several other brands, but HP has been the best. The 170/200/25 are the same block design, with the 250 having a taller deck height (so you can't easily make a 250 from a 200). The Mustang 5.0L Coyote engine has evolved into the Boss 302, VooDoo 5.2L, and the Predator 5.2L. Your email address will not be published. Does anyone remember the six cylinder heads they made for Bruce Sizemore. THE FIRST SET I PURCHASED WERE LIKE THIS AND I INSTALLED WITHOUT CHECKING THEM. Not only did the TFS heads produce the most peak power, they also logged the best average torque and horsepower. It used to be listed in the FRRP catalog. 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. Pic 2 is a spot next to a water port on the intake surface where it looks like the facing tool tilted some. 302 (may have been used on late 68 model year) 4V . 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. Sizemore, formerly of Preperation H fame, did considerable valvetrain developement and terrorized the former checvvy stronghold of I and J/Gas. That means 305 maximum cubic inches. [IMG]http://home.pacbell.net/kketell/USAFlag2.gif[/IMG][IMG]http://a8.cpimg.com/image/56/2C/8548438-4e05-00C8003F-.jpg[/IMG]. Ports 2.38" x 1.68" C9ZZ-9424-C. C9ZE-9425-A . Our FDC has over 150 racing members and FORD promised us Hubert Platts Drag Mustang after series which disappeared. Any advice would be greatly appreciated. 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. For a better experience, please enable JavaScript in your browser before proceeding. Have a 70 351 4v stored 25 yrs 50 k miles complete minus carb dist has manifolds 1800. never lube the seal lip ? Cast from prime A356 T6 aluminum, these "Z" heads from Ford Racing were designed using solid modeling technology. This page last updated: February 3, 2022. I would guess Im somewhere around 375HP @ the flywheel in this build. You might even be able to get some rejects since you'd be cutting them up and remaching anyway. saving. 70 Boss 302 intake 2.19 / exhaust 1.71. These elements made the BOSS 302 a unique mill compared to what the rest of Detroit had to offer at the time. Save my name, email, and website in this browser for the next time I comment. Said to be "overvalved" for street performance. They dont flow as well as some of the more expensive options available but they flow way better than OEM cast iron heads. Was running 850 dbl pump Holley with 4:56 gears, and I was running 12:20s at over 112 mph in the quarter. Better compression then stock, better breathing then stock. Theyre fully assembled with valve springs, retainers, locks, guideplates, studs, and seals. You have to rev it to the moon to really make any power. They are also cast with combustion A stock Boss head will support way over 500 horsepower, where the Chevy will struggle at 400 horsepower. 1/23 . 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. . The TFS heads appeared to be the big dog in the room when it came time for testing. For those who consider swirl a detriment to producing power this is a positive thing. This has been done and is generally called a Clevor (using Cleveland heads on a SBF). For use only with Special heads . 035 (which I am using). Very nice , Made in USA quality and same price as off shore heads. Outperform many more expensive parts. Boss 302 - 1970 Boss. I have tried most all of it and now do what is known to work.. Well, this may be old info, since the warning tells me that the last post for this discussion occurred >100 days ago. Valve stem heights all the same, decent springs, work fine for my rolller cam, good fit and finish. Some additional 302 factory valve sizes: 69 Boss 302 intake 2.23 / exhaust 1.71. No more dyno there. The heads alone are excellent fit and quality. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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 340 HP Boss, Long Block, Assembled, Internal Balance, Aluminum Cylinder Heads, Ford, Small Block Windsor, Each Part Number: FMS-M6007X2302E ( 1 ) Free Shipping Special Order $10,649.99 Not Available At This Time This product cannot be ordered at this time. But as we've seen before, the heads that produce the best peak power also tend to do so throughout the entire rpm band. Ultimately, the best cylinder head for your Ford 302 will depend on your specific goals and needs. 8l F250hd efi roller engine? Speedway and Try-State Cylinder heads both stand behind this product. We will safeguard your e-mail and only send content you request. True but it seems excessive to me. Edelbrock E-Street cylinder heads are just the ticket. in 1969 with Doug Durham and me ,TED FORDMAN EHRHARDT who took a new Boss 302 short block apart and checked all specs. No mention of those holes in the instructions. Combined with the big bore and short stroke, everyone thought these things wanna rev. The reality is that the head flow and dual-plane intake really limited the RPM.. Future availability is unknown. 98 sold reading. 1.290 in Spring. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Needless to say the head kicked ***. GT40 heads use 1.84 intake / 1.54 exhaust. Fords great success with its powerful V8 engines is legendary. My first ever computer was an HP Pavilion PC, and theyve always been my favorite brand since then. View Details. We got our answer. D1ZE service block and aluminum rods. This new design offers a 25-50 HP increase over current Cobra Jet heads, depending upon displacement and camshaft. Revised cooling system passageways Siamese bore with drilled coolant crossover holes (Except on M-6010-B302BB ) Increased bulkhead material Sign up for a free trial to MotorTrend+ today. . This educational content is not intended to be a substitute for professional advice. 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. I just got a block that is 289 .30 over and I wanted to reuse my pistons I think they are sealed power 7006p (obsolete now). The Boss was topped off with an original aluminum. Once I pick the heads I was going to find a good cam for daily driving/ performance. Won't work with the 289 stroke. Meaning, their AQL is very low. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The J code 302-4V was only made in 68. 45 degree spark plug wires work great with these heads. This made-in-the-USA head is Edelbrock's value leader. Cast aluminum block and heads: Intake Manifold: Composite Boss 302 Specific with shell-welded and runner pack: Exhaust Manifold: Tubular . 125 of silicone is likely to blow out. Once I pick the heads I was going to find a good cam for daily driving/ performance. Part of the difference in valve lift numbers between the two is the rocker arm ratios used from the factory. The heads are a direct replacement for previous Twisted Wedge heads and work with all Twisted Wedge specific pistons. Im looking for three Ford Cleveland 4V engines. Heads are sold individually. The problem is the oil drain back passage has very poor alignment with the block and the valves are sitting in a pool of oil. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. While the DZ 302 had a stronger midrange than the Boss 302, in stock form, the Boss reigns supreme in the higher RPM range. 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. The connecting rods began life as the same C3AE rod as the 289 HiPo but they had 3/8" bolts and they were spot faced instead of broached where the head of the bolt sits. Ford brought back the iconic 5.0L in the 2011 Mustang. 1970 Intake - 2.19 inches Exhaust - 1.72 inches. 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. The Tech was nonchalant about this and stated these are a lower end part. They topped a 302 Windsor with the Cleveland -style heads, making the first Clevor. A guy near here used the advice on the link below, starting with a 67 289 2V engine. The cylinder head also contains the spark plug and fuel injector(s). For a better experience, please enable JavaScript in your browser before proceeding. 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. 60 exhaust valves. Nevertheless, for a street engine, this head delivers excellent midrange power. Luckily I had the tools to put them back on but this could have been a issue and made them not bolt on heads. All they had to do was make the piston dome bigger on the 302 to keep the same 11:1 compression ratio.. 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. 1.90/1.60 in Valves. These heads are always perfect, but could use a little bowl work thanks team SUMMIT. DART . The Fora platform includes forum software by XenForo. Pair. Alum. Especially for the price, I would buy them again in a heartbeat. I personally dont think a prospective buyer should have to learn about this issue by reading reviews. We came to the conclusion 4 were 2 close to the sparkplug bore and 2 were to close the the intake runners to be safe to use on the 5073 aluminum head. These are perfect for a street build and the price is outstanding!!. This provided more room for larger valves instead of the standard side-by-side arrangement. This includes 260, 289, 302, Boss 302, 351W and related variants. Before jumping right into the dyno numbers, we need to look at the engines backgrounds to truly understand why they were built, and why they are so equal. Ah now Plummer - it's not a secret if you post it on VMF! Stroke that thing. refresh the page. Fits factory 1979 - 1995 Mustang oil pan with custom oil pickup tube, part number: M-6622-BOSS302 NASCAR inspired front oil feed on both lifter galleys. Fords classic 1969-70 BOSS 302 engine was a bold step forward after a miserable season in 1968. All in all, Im not a fan of this series from Dell. This is my first engine build, let me know if Im doing it all wrong. The BOSS 302's biggest shortcoming is port sizing, which is something Ford has rarely been able to get right. Fig. 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. Boss 302 is a Windsor engine; uses Windsor cam lobe profile & 1.6 Windsor rockers. 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. So now, we have a pair of legends, being compared on the dyno. We'll send you raw engine tech articles, news, features, and videos every week from EngineLabs. The BOSS 302 heads used some of the biggest valves in the industry. Experimental Part . When it comes to the valve events, Ford and Chevrolet took two different approaches. I KNOW FROM EXPERIENCE. You wont find heads of this quality at a better price anywhere. The DZ 302 used a 1.5:0 ratio, while the Boss 302 head used a larger 1.72:1 ratio. Whenever youre running a flat tappet cam, always use a zinc additive, Building Classic Ford 351 Cleveland Power. Boss 302 blocks are used all the time for Windsor headed performance buildups! I recommend purchasing ARP studs and guideplates for perfect rocker alignment. DONT USE ANYTHING ELSE OR IT WILL LEAK. . Bob Perkins(WI) located it and restored it to original shape and build special plexiglass trailer for it to display. Remember this correction adjustment is approximate and is only meant to get you close for the initial start up of the engine. The term refurbished was definitely stretched here: the screws are different colors from the black casing, the bottom rubber footers are looking like they have decayed so that the laptop wobbles, the side has a port that was left wide open with a broken/cracked piece and then when you try to open it, the screen side sticks to the keyboard side like it has a gummy residue of some sort on it. Ford New Boss 302 w/351C HDS Hex Head Stud Kit. 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. Ford engineers took the new 351 cylinder head and modified it to work with the Tunnel Port block. which will help take the wait off the rear main bearing. I am running them on a 302 and purchased this set for a 351 build. 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. If we've muddied the waters a bit, it's only the result delivering more information on the way to a decision. Some of the guys were running ford 300 six cylinders with good success. There are plenty of them lying around used and new-old-stock. Plus we used cam dial-in and it was only off a half degree. IF YOU DO THIS BE SURE TO USE PERMATEX #2 ON THE INTAKE STUDS. my signature linesnot really directed at anyone in particular.. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Its biggest weakness may be the price. Truth is, a factory original Boss 302 is happiest with a 600 to 650 cfm Holley. ), then the second-least-expensive headsthe Edelbrock E-Street headsreally begin to stand out. The factory Boss 302 did not have a deep sump pan although it did have a baffle in the sump, and yes it has 1.73 ratio rockers from Ford. 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.