45 degree spark plug wires work great with these heads. Search 6 Hohenthann siding contractors & companies to find the best exterior and siding contractor for your project. Huge difference in quality. Im looking to build an engine that produces 300ish hp. We learned on the first few pulls that we had too much carburetor with our 750 cfm Holley 4160 and too little camshaft. 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. 302 (may have been used on late 68 model year) 4V . We'll send you raw engine tech articles, news, features, and videos every week from EngineLabs. They have cast iron seats and guides (titanium valve compatible) and are set up for studs and guide plates. This made-in-the-USA head is Edelbrock's value leader. Gurney Eagle : Gurney Eagle race heads : Application. 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. Valves 2.02 / 1.55" . 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. The supply chain issues are eliminating a lot of choices. Was running 850 dbl pump Holley with 4:56 gears, and I was running 12:20s at over 112 mph in the quarter. 154-4207: Ford Racing Aluminum Valve Covers, Part # M-6582-Z351, SS, 12pt . So now, we have a pair of legends, being compared on the dyno. Part of the difference in valve lift numbers between the two is the rocker arm ratios used from the factory. Have you got the intake? Needless to say they began to really spank everybody and by the end of the season the six cylinders were out ruled. What? Other Intakes >> Application. 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. Ive had several other brands, but HP has been the best. They feature high-flow ports and steel alloy intake and exhaust valve seats installed (they do require a competition valve job and bowl blending). Prices listed are from the story's original publish date, February 1, 2013. 1.290 in Spring. Cylinder heads are available fully assembled or as bare castings. My first work Dell was super slow and sluggish, so I was sent a new one. Did you get them at a Chevy garage sale? Ford Racing teamed up with Jon Kaase to redesign their 429 Cobra Jet cylinder heads, and the results are these Super Cobra Jet heads. THAT IS UNACCEPTABLE IN MY BOOK. Suddenly these heads arent so appealing. Any who, this is a work laptop, and it started out pretty fast, but over time, it eventually slowed down. It was honestly a guess on my part and the Tech had no additional information or opinion to offer. 8:1 compression, TFS Stage 1 hydraulic roller cam, 1 5/8 headers, Summit Stage 1 dual plane intake, Edelbrock 650 AVS carb. In the 1960s, Ford was an outspoken car company, much as Pontiac Division was within General Motors. However, it is generally agreed that aftermarket cylinder heads can provide significant performance gains, and that aluminum heads are often the best choice for racing applications. 165 cc Intake. Because the new 351 engine had the same bore spacing as the 289/302, it seemed logical for Ford to adapt this high-performance cylinder head to the small-block Ford V8. The Boss used a mild camshaft, mild compression, and lots of head flow, Holdener says. Feb 19, 2016. Above you see a casting with a D1ZE part number. Budget iron can run $1195.00 for an easy 500 + hp but any more needs more valve area. The spark plugs are also positioned well, and I cant foresee any interference with any headers. 18 Ft/Lbs - Aluminum Heads. Weve got 302 fords with gt40 3 bar heads making over 500 hp. These features improve an engines efficiency, resulting in more horsepower and torque and improved mileage potential. IF YOU DO THIS BE SURE TO USE PERMATEX #2 ON THE INTAKE STUDS. (Image/Jim Smart) Although these are 1969-70 BOSS 302 heads, they []. Can you further help me with where to buy this? Where in the world did you come up with the "347s are not reliable"?. DART . There are many different types of cylinder heads for Ford 302 engines, so it is difficult to make a definitive conclusion about them. They dont flow as well as some of the more expensive options available but they flow way better than OEM cast iron heads. but thesell work on a large engine and flow, too. 546hp @5600 rpm also had 630 ft-lbs torq@ 4400 rpm. 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 J code 302-4V was only made in 68. The heads also required custom-length Comp Cams pushrods to compensate for the relocated valves. Im sure you had over 400. When you shop through links on our site, we may earn an affiliate commission. high power capabilities. To clear up a few questions, the combustion chambers are 60cc, not 64cc. 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. I wanted to built a great runing, mild street motor around a stock sbf 302 short block. After the engine is warmed up to its proper operating temperature range, you must go back and reset all the valves to the proper "hot" valve lash settings. The Twisted Wedge heads also had the strongest horsepower curve above 4,000 rpm of all the heads tested. Im not sure what has happened to Edelbrock, but their quality control sucks. Reworking Cleveland heads I think would require reducing the size of some of the water passages and I unsure of the block clearance . Not sure about the 5089. Exhaust - 1.72 inches. 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. JavaScript is disabled. I am through with their products. It used to be listed in the FRRP catalog. Plus, they give you more power behind the wheel and in your wallet! One thing I found particularly awesome about these heads is the spark plug holes and threads. That puts lift over .500 inch .514 according to our calculations, minus the lash, Holdener reveals. The Good and Bad of the head bolts on the SBF is that their are only 8 of them. Does any 351 Cleveland head fit it? Pic 3 shows what looks like an area of casting slag that was missed when they were cutting and cleaning out the valve seats and runner. Fords incredible 1969-70 Trans Am BOSS 302. Compatible with Chevy Small Block 302/327/350/383/400 SBC 200cc Intake 68cc Angled Plug Aluminum Bare Cylinder Head $238.88 $ 238 . These are perfect for their intended use, the street. 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. You'll notice that we attenuated the horsepower graph to include just the power curve between 4,000 and 6,200 rpm. Age Group: adult. As far as I'm aware you only choice for factory heads in the Boss 302. (BOSS) When the SCCA started the Trans-Am series. 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. The runners are as cast and a bit rough. Boss 302 heads are unique.No other heads will work without some changes. LOOKS AND PERFORMED GREAT. Ford has always been a car company that dared to go where no automaker had ever gone before. This conversion was well documented and fairly popular when aftermarket heads were not available. These lightweight aluminum heads bolt up to your small block Ford and feature 190cc intake/60cc exhaust runners, 60cc combustion chambers, and 2. The intake valves all have. You MUST flycut the valve reliefs on the pistons larger if using stock pistons. Age Group: adult. All they had to do was make the piston dome bigger on the 302 to keep the same 11:1 compression ratio.. The Edelbrock #5073 E-Street cylinder heads are designed for use with 1955-1986 Small-Block Chevy applications. The product is a great entry level/cheap head though so 5 stars! 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. I purchased these because I needed some better than stock, but not full out race heads. The biggest difference between the two engines is the cylinder heads.. The GT-40 cylinder head was produced in cast iron and aluminum, available from Ford Motorsport SVO and Ford Racing. Once I pick the heads I was going to find a good cam for daily driving/ performance. Due to the larger Cleveland-style heads, the Boss 302 weighs somewhat more than the normal 302, tipping the scales at 500 lbs. Learn how your comment data is processed. 040 roller short block A little lope at idle but it pulls everywhere in the rpm range. Get big power on a small budget with BluePrint Muscle Series cylinder heads! 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. 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. Renegade Street. 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. THE FIRST SET I PURCHASED WERE LIKE THIS AND I INSTALLED WITHOUT CHECKING THEM. Heads are sold individually. Assembled. 1970 Fastback (to be finished outside as a Boss 302 tribute), thanks for all the responces! Its not a good time to be building a performance engine. This combo has been dynod at 460-ish hp at 5000 rpm and 550 ft lbs of torque at 2000 rpm. Great option. The DZ 302 in the Z/28 was a natural marketplace competitor to the Boss 302 from Ford. However, way down low, where the big-port Boss 302 motor isnt supposed to work, it made decent low-speed torque. Hack said: The size of 302 valves has varied a little in some performance versions over the years. 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 . The Boss 302 takes the Mustang GT's suspension and adds higher-rate coil springs, stiffer bushings, and a larger diameter rear stabilizer bar. 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. Some additional 302 factory valve sizes: 69 Boss 302 intake 2.23 / exhaust 1.71. 1969 mustang fastback boss 429 351 race car front end. 58 cc Chamber. 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. Ford brought back the iconic 5.0L in the 2011 Mustang. Otherwise, pair these with some flat top pistons with the correct valve reliefs. The Boss 302 and 351C-4V head casting are the same except for a minor difference in water passages. D1ZE service block and aluminum rods. we all have our shortcomings. The factory 780cfm carburetors are really, really expensive, and we didnt want to spend a few thousand dollars on a carburetor, explains Holdener. The Mustang 5.0L Coyote Engine Gen 1, Gen 2 & Gen 3 differences are explained by Landan with LMR. For a better experience, please enable JavaScript in your browser before proceeding. 58 cc Chamber. More than 400 horses easy. It didnt conform to corporate protocol and invented the muscle car in its 1964 GTO. you could also get a 302 crank and rods with custom pistons, a 302 crank with 289 length con rods and off the shelf b2 pistons. See all 22 photos. Bob Perkins(WI) located it and restored it to original shape and build special plexiglass trailer for it to display. Better than fighting with iron cylinder heads. These heads are always perfect, but could use a little bowl work thanks team SUMMIT. Fits on Dodge ramcharger, monaco, w100 series, sierra, pioneer, d300 pickup, d100 series, custom. Fords great success with its powerful V8 engines is legendary. AIR FLOW RESEARCH 1402 SBF 165cc Alum Heads Renegade Street 58cc. Find Parts and Accessories Boss 302 aluminum heads KEYWORD and get Free Shipping on Orders Over $99 at Summit Racing! They pull much harder through the midrange than the 351W heads they replaced on my 302 Ford. One side opted for mild lift and more duration, and the other went for more lift and milder duration. Twisted Wedge and Canted valve (TFS and C302b) in aluminum promote even better performance. 09 of shims installed so they look good. They show to be suitable for the 221-302 Ford Small Block. Performance Distributors Keeps The Spark Alive With SOS, A New Diesel Piston That Increases Power And Reduces, Shop Tour: Brian Tooley Racing Expands To Be A One-Stop, Melling Offers New Timing Kits for Ford 4.6L and 5.4L SOHC, Reborn Retro Blower Packs Positive-Displacement Power For Fox, EngineLabs Tool Of The Month: Summit Racing Lb-In Torque, Why You Should NOT Emissions Delete Your Diesel, Can A Cold Air Intake Really Help Your Trucks, Ask The Expert: We Want Your Questions For Canton Racing, The Answers: DeatschWerks Responses To Your Fuel System, SEMA 2022: GEARWRENCH Leveled Up With Distinct Quality Hand, EngineLabs Tool Of The Month: Summit Racing AN Wrench, HOLY SHIP! It would make a nice high rpm engine that was pretty soft on the lower end where you spend the most time. These heads have the right size valve for those piston. Street Cruiser Cylinder Head. But for perhaps a majority of enthusiasts, this evaluation may be too simplistic. The BOSS piston was a unique item, configured to use the 289HP rod with the 302 stroke. 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 . 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. No drilling is required since it appears they updated the manufacturing process to eliminate this need. I personally know several guys with Boss 302s that have been secretly stroked to 347. . I was wondering how these heads would work on my 97 5. GT40 heads use 1.84 intake / 1.54 exhaust. 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. Currently working on a 1970 Mach 1 project. detroit metro auto parts "302" - craigslist . The heads are Cleveland heads. 2.02/1.60 in Valves. Maximum output for less money!. The winner in this evaluation is almost always the least-expensive head just because of the way the math formula works. The real question is, what do these factory motors make, and how do they compare to each other?. 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. But there is absolutely something else wrong. At idle when vacuum is the highest the valve guides leak lots of oil into the intake. On episode 19 of Engine Masters, David Freiburger explains cam lift, duration, lobe separation angle, and installed centerline. Just my thought. supershifter2 :shocked: :shaking: < :bs: ! The Ford head uses a net-lash design that makes the valvetrain non-adjustable. reach with flat gasket seat. 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. 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. You can see the marks the intake valves made so you can clearly see the reliefs are not big enough (as in diameter, not depth). So howd they stack up? The additional space improved the engine's breathing. 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. And like the others mention, it was C.J. The DZ 302 used a 1.5:0 ratio, while the Boss 302 head used a larger 1.72:1 ratio. Im using a fairly mild flat tappet cam, so growing the installed height of the springs by 60 or 70 thousandths woul put both the seat pressure and open pressure weill within specs for a flat tappet cam.