Exhaust flow with a 1 3/4 inch pipe and standard comp. Disclaimers: The C3H is Yates but has a higher intake port that requires a specific intake manifold. The engine was a 302 HO or a 302 Special, but now every one calls the engine a BOSS 302. CNC Rons Porting Service Alum, Edelbrock 18 Deg. The TFS heads generated peak flow numbers of 250 cfm (intake) and 193 cfm (exhaust). HERBERT CJ4S Cylinder heads from a Boss 302 have slightly modified coolant passages to allow everything to mate up perfectly. 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. Not bad considering we were dealing with a static compression ratio near 10.5:1. Im sorry guys but you somehow missed something there are boss 302s out there cranking out way more than what you guys are claiming. Ported Chad Speier I-50 E-50 Alum, Edelbrock/ Chapman Victor 18 Deg 61089 Alum, Edelbrock/ Chapman Victor 18 Deg 61109 Alum, Edelbrock 61119 Victor 15 Deg. Ron Manna was in the planning stages of his engine build. It had to sneak the GTO in under the radar of upper management. 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How are heads that have a good and a bad port handled? This engine was built in the 80s by someone with way to much money. More than 400 horses easy. Some of us may be too young to actually have driven an original Boss 302 back when they were introduced in 1969, but all Ford guys should know the history of such an impressive performer. This compares to just 166 cfm and 112 cfm (from port volumes of 127cc and 44cc). Because the 351C has a dry intake manifold, coolant doesn't flow through the intake manifold. Your comment answered my question about the oil level as I changed oil tonight. The BOSS 302 heads used some of the biggest valves in the industry. These elements made the BOSS 302 a unique mill compared to what the rest of Detroit had to offer at the time. No recommendations for camshaft manufacturer or camshaft part numbers are intended or implied. 77569, 77579, 77589, 77599, 77619, 77629, 77639, 77649 SF1020 Alum, Edelbrock Victor Jr. 23 Deg. Although the oil pan is the same as a regular 302W, the BOSS dip stick is shorter (and chromed) so the engine takes about two extra quarts of (7 instead of 5) to show its full. c. Small tube headers with mufflers good luck with that. The brute 427 FE Series big block that won Le Mans also reigned supreme in limited production 1964 Thunderbolt Fairlanes in NHRA competition. 5) The output is useful for determining the effect of changing camshaft parameters and keeping all other parameters constant. Since the goal for our 302 was to exceed 500 horsepower, we selected a set of the 208cc 3V aluminum CHI heads. . JPC- 2011+ GT/Boss Breather Package. Why would you build a 302. (Image/Jim Smart) Although these are 1969-70 BOSS 302 heads, they []. To put this into perspective, even a fully ported, factory iron Windsor head would not flow as well as a stock Boss 302 or 351 Cleveland head. What the Boss 302 and Cleveland heads did share was tremendous airflow potential thanks to cavernous port volumes. We want the best flow numbers with the smallest port volume and the highest velocity (up to a point). Crane F-278-2 If the Boss 302 head flow numbers were "too" big for a street driven car: what are the numbers, comparisons against the top of the line Windsor heads being advocated today? If you are building a stock engine with all stock parts then you can probably rest easy without too much thought using the stock Ford camshaft or one that is similar. Raced and owned quite a few Boss 302s. No guarantee of actual performance of any engine/camshaft combination can be made. The Boss was topped off with an original aluminum dual-plane intake, 750 Holley carb (they came with 780s originally) and a set of 1 3/4-inch Hooker headers. His main differences from stock are the carburetor size and compression ratio as noted below. Small block Ford PRO1 20 170cc Aluminum cylinder heads feature high flowing as cast ports with profiled valve guide bosses and are bowl blended on 5-axis CNC machining centers. Ported PowerHeads SF600 Alum, 4.6L 2V P.I. CNC Rons Porting Service Alum, Edelbrock 18 Deg. Ford Stock BOSS 302 flat in the quarter. The 3 center main caps have 4 bolts instead of 2and the crank shaft is forged steel. But that is another dyno story for another day. ENGLE 2125 Wanted one all my life. BTW, the 1969 - 1970 Boss 302 had an engine code of "G", and were factory rated at 290 HP @ 5,800 RPM and 290 FtLbs @ 4,300 RPM. Index your plugs on these engines. Ported Chapman Alum, Edelbrock 15 Deg. Howards 212271 The oiling system upgrades were critical for our high-rpm needs. Basically the heads are similar to IMM EQs. Im extremely disappointed in this blog.. 10 years????? The engine was factory rated for 290 horsepower at 5,800 rpm and 290 lb-ft of torque at 4,300 rpm, and power is sent through a four-speed manual transmission to a 9 . This cylinder head casting, aside from cooling passage differences, is also the 1969-70 BOSS 302 head. 3) All output was obtained using DynoSim Advanced Engine Simulation program version 4.1. Neither head had good velocity. 8.2" deck height, finished at 8.200" plus .010" to .015". HERBERT CF4N Higher compression ratios require far less total advance. Once we had emptied our bag of tricks, we were eventually rewarded with peak power numbers of 520 hp at 7,200 rpm and 399 lb-ft at 5,700 rpm. Although dual-point distributors reduce point bounce, they dont eliminate it. Ford went to Le Mans and beat Ferrari not once, but four times, settling an age-old dispute over who had had the fastest cars in the world. Ported Steen Racing Stage 1 Alum, '99 & up P.I. The BOSS 302's biggest shortcoming is port sizing, which is something Ford has rarely been able to get right. BOSS 302; Circle Track; Contingency Program; Dealers. We got more than 450 HP on Fords dyno when we blew right rear tire and it took out Ford training board. boss 302 . Gross lift was obtained by multiplying lobe . You need to do your homework and consult with your engine builder. Compromises affecting BOSS 302 performance were made in meeting those objectives. Exhaust flow should match whats on Livernois web page since the exhaust valves were not cut. A 347 with 351C heads and a stock Boss 302 intake or the Street or Track Boss intake will really run. There are plenty of them lying around used and new-old-stock. Exhaust runners are raised .135" for improved flow. e. Dual Plane Manifold, High Flow configuration Look at Tremec Trans Gear Calculator comparison to BC stage 3 gear set.Boss heads are back from Livernois bowl clean up to improve flow. The 351C 4V motors, and even the smaller 1969 & 1970 Boss 302, offered head flow unmatched by any (regular) production small block Ford, Chevy, or Dodge heads of the period.
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