So, instead, they ran a simple 750cfm Holley carburetor, along with 1-3/4-inch dyno headers. No mention of those holes in the instructions. I have used them for over 35 years and never seen something like this. This is my first engine build, let me know if Im doing it all wrong. A borescope down the intake revealed lots of oil in the intake runners near the valves. 035 (which I am using). Generator stud kit for 1938-48, use #8506. The winner in this evaluation is almost always the least-expensive head just because of the way the math formula works. Peak power numbers are always fun to throw around, but car-crafters are also very astute at determining what all that power will cost. Stroking an engine is not going to reduce your engine rpm. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. They dropped off after that. 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. Not true! 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! So the induction system is kind of a toss-up. You wont find heads of this quality at a better price anywhere. If you had the right pistons, you could use 351C 2V heads which are cheap and plentiful and don't have the low end port velocity issues 22GT described. reach with flat gasket seat. So now, we have a pair of legends, being compared on the dyno. Chevy used higher compression and lots of camshaft, combined with mild cylinder heads. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. E7 heads use 1.78 / 1.48 just like the 60s stuff. While it only had .480-inch of lift, that duration would really allow the RPM to climb. No problem coming off corners at low rpm in higher gears and the pull in the higher gears on top is amazing for what I paid for them. I also figured that the DZ 302s smaller heads, with better port velocity and more compression, would make more peak torque. I have certificate for it. Plus we used cam dial-in and it was only off a half degree. Ford Small Block Engine Data & Specifications | CarTech While the tunnel port wasnt a complete success, thats how the Boss heads came to be. All in all, Im not a fan of this series from Dell. Would modifying the heads bring down the value of the heads? Semi or Farm tractor repair shops would probably have the location of one near you.Now, with all the Aluminum small block head available, you could create a real bad 6. Whoever invented that crap ought to be shot. reading. I personally dont think a prospective buyer should have to learn about this issue by reading reviews. Besides the hemi-style heads themselves, the benefits of this new setup are many: For instance, a deck thickness of 0.7 inch to encourage safe use of power-adders, and full water jackets for proper cooling. 45 degree spark plug wires work great with these heads. The BOSS 302 Registry is not affiliated with the Ford Motor Company. SB Ford WP Man O'War iron block/Man O'War aluminum head Head Bolt Kit. I was still only available with the special 302ci 290 hp high output engine. Learn how your comment data is processed. 1969 Ford Mustang Boss 302 | Hemmings 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. In 1970 the Boss 302 was a Camaro killer, it could go 0-60 mph in 6.0 seconds. Any advice would be greatly appreciated. What I got was good, but the quality control person should not have let these go out the way they are. These elements made the BOSS 302 a unique mill compared to what the rest of Detroit had to offer at the time. I really liked my 69 428 CJ. GT40 heads use 1.84 intake / 1.54 exhaust. I never did own a Boss 302, but I was around them when they were new.I have had lots of 351C. The Edelbrock #5073 E-Street cylinder heads are designed for use with 1955-1986 Small-Block Chevy applications. 88 DNA Motoring LEPOW-038 Aluminum Bare Angled Cylinder Head [For Chevy SBC 302/327/350/383/400] 3 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. Exhaust - 1.72 inches. Ford Performance 289/302/351W Aluminum Cylinder Heads - JEGS 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. IF YOU DO THIS BE SURE TO USE PERMATEX #2 ON THE INTAKE STUDS. 015 AND THE REST WERE. Ford took on the world with the GT40 supercar. 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. These are certainly worthy of attention at this excellent price. but thesell work on a large engine and flow, too. Edelbrock E-Street cylinder heads are just the ticket. Build a Better Boss (302 Ford, That Is) - OnAllCylinders The Chevrolet used a 1.50:1 rocker, while on the Cleveland head, they used a 1.73 ratio. To conceive the BOSS 302, Ford had to develop a special forged piston with a significant dome that would reach deep into the 351C heads 64 67cc chambers. Thesecret to a long life stroker is to add wieght to the crank so you can exterally balance @ 28 oz. I changed the thermostat so it would dump alittle more gas in her no problems so for. Your email address will not be published. Because they didnt allow destroking [of an existing engine design] initially, both companies had to build actual displacements of five liters, explains Holdener. 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. Greg has spent eighteen years and counting in automotive publishing, with most of his work having a very technical focus. Im sorry guys but you somehow missed something there are boss 302s out there cranking out way more than what you guys are claiming. Said to be "overvalved" for street performance. ), then the second-least-expensive headsthe Edelbrock E-Street headsreally begin to stand out. 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. The BOSS 302 heads used some of the biggest valves in the industry. cast iron vs aluminum | Mustang Forums at StangNet These heads are coated with assembly lube out of the box. They will outperform many of the average aluminum heads. Camshafts were quite similar to the 289 HP. A Modern Ford 351 Cleveland Nets Almost 900 Horsepower N/A - EngineLabs Boss 302 blocks are used all the time for Windsor headed performance buildups! 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. Ford had and did a great job with Ford Motorsports programs which we were in . It was honestly a guess on my part and the Tech had no additional information or opinion to offer. 546hp @5600 rpm also had 630 ft-lbs torq@ 4400 rpm. Renegade Street. The connecting rods and crankshaft are made of forged steel, and the heads are aluminum with roller rocker arms. 0:1 on blocks with a 3/16 base relief (stock bore and stroke). . Heads are sold individually. But, I just came across this website and happened to ask about B. Sizemor's 6. Best 302 Heads - Our Top 5 Selection from 99+ Models 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. The BOSS head was functionally identical to the 351C 4V head. As far as I'm aware you only choice for factory heads in the Boss 302. How can you call it racing if you're putting the brakes on before the finish line? The less you know the more you need vacuum secondarys. Valves 2.02 / 1.55" . 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. While the DZ 302 had a stronger midrange than the Boss 302, in stock form, the Boss reigns supreme in the higher RPM range. 302/351 X2 Head. Other than that it was OK. Dimensions in Inches (LxWxH): 24.1 x 24.1 x 8.7. Our FDC has over 150 racing members and FORD promised us Hubert Platts Drag Mustang after series which disappeared. We learned on the first few pulls that we had too much carburetor with our 750 cfm Holley 4160 and too little camshaft. Building LS garbage? Bought these and compared to the other (PC). THAT IS UNACCEPTABLE IN MY BOOK. The heads were to big for a 351CLEVELAND. extreme amount of burrs left all around the rocker shaft mounting pads. As the 1968 Tunnel Port engine turned into a disaster, someone at Ford Engine Engineering got the idea to put a set of Cleveland heads on a Tunnel Port block and thus was the beginning of what would become the BOSS 302 engine. Because the BOSS 302s heads sported monster-sized intake ports, these engines had a high-revving demeanor with peak torque and horsepower coming in around 7,000 rpm instead of the Tunnel Ports outrageous nine grand. 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/. One side opted for mild lift and more duration, and the other went for more lift and milder duration. Flat cylinder heads have large water capacity and excellent breathing characteristics. You will need the boss piston to go with the canted valves.. No. Just A Taste is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. 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. 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. These heads are screaming on the 302 I just built and are great quality. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. But for perhaps a majority of enthusiasts, this evaluation may be too simplistic. Prices listed are from the story's original publish date, February 1, 2013. 60 exhaust valves. Opens in a new window or tab. I didnt and I think some of that lube got burned on the valve seat and causing it to not seal but, will have to open it up to find that out. Differences Between the Mustang 5.0 Coyote Engine - LMR.com and if you want to use a high-lift cam or supercharger; thats no problem, either. However, it also led to a lot of upset Bowtie fans for some reason. It should be in the product description and specs. Part of the difference in valve lift numbers between the two is the rocker arm ratios used from the factory. Keep the RPMs under 5,500 and valve lift is more like. For a better experience, please enable JavaScript in your browser before proceeding. I expected cleanup, but not like this. If you're drag racing in a class where the weight of the car divided by the cubic inches determines what class you run in, it may be advantageous to drop the displacement a little if it will allow you to get into the faster side of a slower class. saw a pair of Boss 302 heads online for $400 and thought why not. There was also drill flash from the machining of the bores for the valve guides and spark plugs. 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. Hack said: The size of 302 valves has varied a little in some performance versions over the years. Flashing in ports was unacceptable. Get big power on a small budget with BluePrint Muscle Series cylinder heads! A stock 1970 Boss 302-spec solid, flat-tappet cam was used and offered a tad over .500-inch lift and 228 degrees of duration at 0.050. 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! Generator stud kit for 1938-48; use #8506. I would however like to be able to buy a set of heads and not have to go through them like I had to with these. Have you got the intake? Finding a Street Boss intake likely wouldn't be too difficult as multiple manufacturers have cranked them out over the years.