Ford's 302 crate engines use Boss 302 iron blocks. These are certainly worthy of attention at this excellent price. Was running 850 dbl pump Holley with 4:56 gears, and I was running 12:20s at over 112 mph in the quarter. Intake - 2.23 inches The only caveat to all this is that the Twisted Wedge heads do limit valve lift (0.600 inch) and duration on stock pistons due to their repositioned intake valvejust so you know. All Rights Reserved. To pull this off, we needed a durable mule, so we chose Ford Racing's Boss 302 345-hp crate engine that comes with a set of aluminum heads actuated by a 0.480-inch lift B303 hydraulic roller cam, and 9.0:1 compression. Well, I got about 500 miles on the engine now and couldnt be happier about the build. Just my thought. Age Group: adult. I also figured that the DZ 302s smaller heads, with better port velocity and more compression, would make more peak torque. reading. 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. 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). OK, you can do pretty well on a budget. It was honestly a guess on my part and the Tech had no additional information or opinion to offer. If ultimate power is not the most important point, then you could easily choose any of these heads and make a good decision. . 1969 ONE WAS OFF BY. 188cc Intake/63cc Exhaust Port Volume. This particular evaluation only works, however, if lowest cost is the highest priority. 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. Parts made from tooling for the cancelled 1971 BOSS 302 were used for service. Renegade Street. Small Block Ford. Won't work with the 289 stroke. 500 max! 1969 Intake - 2.23 inches Exhaust - 1.72 inches. All in all, Im not a fan of this series from Dell. Other Intakes >> Application. The Dart castings would have been the Iron Eagle versions, and the Pro Comps are affordable in aluminum. I personally know several guys with Boss 302s that have been secretly stroked to 347. Like we said, if best power or least price is your only concern, then the decision is easy. I recommend purchasing ARP studs and guideplates for perfect rocker alignment. These lightweight aluminum heads bolt up to your small block Ford and feature 190cc intake/60cc exhaust runners, 60cc combustion chambers, and 2. 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. There are plenty of them lying around used and new-old-stock. 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 . It took about 500 honest HP to break into the 11s with a little bit heavier car than your mustang. 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. Assembled. This provided more room for larger valves instead of the standard side-by-side arrangement. Search 6 Hohenthann siding contractors & companies to find the best exterior and siding contractor for your project. 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. Hot Rodding's Engine Annual and it lays out an article on Bruce Sizemore's I-gas Pinto which reads "How to Build a 500 hp 6-cylinder Ford. The Cleveland heads can fit a 302 with the appropriate water passage mods and shouldered bolts to compensate for the bolt hole difference. Bill Mitchell Products BMP 087510 - Aluminum Engine Block Ford Small Block 302 Mains, 8.200 Deck, 3.995 Bore, Billet Caps. What I have found out so far, the engine runs. Ford engineers took the new 351 cylinder head and modified it to work with the Tunnel Port block. I was building that garbage in 2nd grade. As fitted to the Boss, the heads feature steel spring seats, screw-in rocker studs, pushrod guide plates, and adjustable rocker arms. The additional space improved the engine's breathing. The Fora platform includes forum software by XenForo. The heads also required custom-length Comp Cams pushrods to compensate for the relocated valves. Cylinder heads are available fully assembled or as bare castings. good luck with that. Yes you can bolt the 351C heads to a 289/302/351W block. Otherwise, pair these with some flat top pistons with the correct valve reliefs. He stated he spent over $10,000 back then. 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. http://fordsix.com/forum/viewtopic.php?t=33048, 1971 Ford Maverick - Budget 10-Second Turbocharged Maverick Coupe - Car Craft Magazine. Do 302 cylinder heads increase RPM? 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. 45 degree spark plug wires work great with these heads. Better than fighting with iron cylinder heads. Not true! A tad shorter then a 351W but a little wider due to the size of the heads. . For those who consider swirl a detriment to producing power this is a positive thing. The intake is off a 1965 Shellby. This 302 was in a F250 so I have to find the proper oil pan to fit the 83 foxbody, and proper fit for the oil dipstick entering the oil pan. 2023 Power Automedia. Cross Boss 302 Mustang off highway use. [] Heres a close up of the head Marvin is using on our 351C build. Street Cruiser Cylinder Head. 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. . searching. reach with flat gasket seat. it will be a "high winder" and with a bullet proof bottom end and a 4 bolt block could run to 10,000 rpm b 4 exploading ! Exhaust - 1.72 inches. Needless to say the head kicked ***. Maximum output for less money!. Boss 302s did indeed have 1.73 ratio rockers from the factory. Peak power was good, at 349 hp, and torque is also reasonable. Though I rated the overall part as good, the areas that really count are just average. They feature revised valve angles and locations to reduce cylinder wall shrouding and improve flow, along with redesigned combustion chambers to accommodate the more centrally located valves. I was still only available with the special 302ci 290 hp high output engine. Generator stud kit for 1938-48; use #8506. 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. All rights reserved. Works with most standard components. They are very capable iron heads. 1970 - D0ZE-6090-A or B. Sure there's someone on here that could tell you what heads you have would be better but with the right (mild) cam, good intake, etc. The Ford roller rockers use a fulcrum base and a 5/16-inch bolt to attach the rockers to the head. It used to be listed in the FRRP catalog. Both had dual-plane high-rise intakes and big Holley carbs. Are there any aftermarket heads for it? The heads were to big for a 351CLEVELAND. But as others have mentioned there are modifications that must be done to make it work. Edelbrock E-Street cylinder heads are ideal for entry level street performance engines. 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. Edelbrock 5093: Cylinder Heads, E-Street, Aluminum, Assembled, 84cc Chamber, 210cc Intake Runner, Mopar, Big Block, Pair Are you looking for a set of entry-level street performance heads for your modern street rod, muscle car, or truck? See the top reviewed local exterior and siding contractors in Hohenthann, Bavaria, Germany on Houzz. It should be in the product description and specs. Future availability is unknown. 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. 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. They had to combine a four-inch bore from a 327 block with the three-inch stroke from the 283, Holdener elaborates. Aluminum heads are affordable, lighter and will make more power. The Ford head uses a net-lash design that makes the valvetrain non-adjustable. 58 cc Chamber. The holes are just big enough for the spark plug socket, which guides it in perfectly. 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. Those of you who understand the BOSS 302 know Ford fitted these engines with a 780 cfm Holley but not necessarily because thats what they needed. I wanted to built a great runing, mild street motor around a stock sbf 302 short block. Learn how your comment data is processed. What? We started FORD Drag Club at Horn-Williams Ford in Dallas,Tx. Today, the aftermarket lineup of Ford cylinder heads has plenty of castings from which to choose. The most notable thing about the Flo-Tek heads available through Speedway Motors is the pricethat's $739.98 for a complete, ready-to-bolt-on pair of aluminum heads for a small-block Ford. Not even close to what I thought I should be getting in a brand new set of heads. The supply chain issues are eliminating a lot of choices. We did this to expand the scale to show the differences in power near peak horsepower. My fault for not setting the intake on the engine to check my end gaps. Part of the difference in valve lift numbers between the two is the rocker arm ratios used from the factory. SB Ford WP Man O'War iron block/Man O'War aluminum head Head Bolt Kit. So now, we have a pair of legends, being compared on the dyno. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 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. Throw a blue oval flag over the RHS, Edelbrock, and Ford heads, and the performance is very similar. 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. Ah now Plummer - it's not a secret if you post it on VMF! So howd they stack up? Is it the 69 or 70 Boss 302 head that's more streetable? Moving to the Blue Oval, we see that they went with a milder profile. 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. I never did own a Boss 302, but I was around them when they were new.I have had lots of 351C. . When I set the carb I get a bouncing vacum needle at idle, Ive been told thats a sign of a sticking valve. Suddenly these heads arent so appealing. Where in the world did you come up with the "347s are not reliable"?. These aluminum heads can be directly installed on all small-block Fords: 289, 302, 351W and, with some modifications, even 351C engine blocks. i knew a guy that put a set on his 65 shelby. I called AFR about the problem and their only suggestion is to install a crankcase vacuum pump. very poorly packaged, opened it and there was no screen protection sheet between screen and keyboard. The 69 and 70 F code 302's are rated at 220 bhp. So the induction system is kind of a toss-up. There was also drill flash from the machining of the bores for the valve guides and spark plugs. He used a correct Duntov camshaft and set the lash a little tighter than the original spec, at .020-inch. Condition does not matter! "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. A stock Boss head will support way over 500 horsepower, where the Chevy will struggle at 400 horsepower. Bolts in anywhere a 302 will go with the right headers and pan. The BOSS 302 heads are known as "Cleveland style" heads as they are based on the head designed for the 351 Cleveland engine. For a better experience, please enable JavaScript in your browser before proceeding. 015 AND THE REST WERE. Bob Perkins(WI) located it and restored it to original shape and build special plexiglass trailer for it to display. The Edelbrock #5073 E-Street cylinder heads are designed for use with 1955-1986 Small-Block Chevy applications. These are perfect for the low compression big blocks of the mid to late 70s. Generator stud kit for 1938-48, use #8506. Purchased a long block on CL. 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. we all have our shortcomings. However, in the upper RPM range, the Boss 302 shows a definite, significant advantage over the DZ 302. That would probably have been the only intake available to work , at that time. FORD 5.0L/302 Cylinder Heads. Thesecret to a long life stroker is to add wieght to the crank so you can exterally balance @ 28 oz. Truth is, a factory original Boss 302 is happiest with a 600 to 650 cfm Holley. However, Ford already had that architecture in its lineup, while Chevrolet did not. 3/1 . To pull this off, we needed a durable mule, so we chose Ford Racing's Boss 302 345-hp crate engine that comes with a set of aluminum heads actuated by a .480-inch lift B303 hydraulic. Aluminum Block Aluminum Heads - Subtract .012? We were smart enough to test-fit the heads on the Boss 302 block before testing began and discovered these heads are designed to be used with 7/16-inch head bolts, with restrictors in the head-bolt holes.