There are two Cleveland engine builds for you here: one from Trick Flow Specialties and another from Hot Rod magazine contributor Jeff Huneycutt of www.horsepowermonster.com. Each of these builds shows what can be done with both the 351C and 400 given budget and savvy engine-building technique.
Trick Flow Specialties
Trick Flow recognized the dilemma facing Ford buffs saddled with rather pathetic factory iron heads in North America. The 351C-4V heads have great 62- to 64-cc wedge chambers with outstanding quench characteristics, yet have huge ports that deliver at high RPM, but suffer at low speed. The 351C-2V head has right-sized ports designed for low- to mid-range torque and even good highend power. However, they’re ineffective for the kind of power you want to make.
This Tech Tip is From the Full Book, FORD 351 CLEVELAND ENGINES: HOW TO BUILD FOR MAX PERFORMANCE. For a comprehensive guide on this entire subject you can visit this link:
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Trick Flow introduced its new Power- Port Cleveland head designed specifically for the 351C, 351M, and 400 with rightsized intake and exhaust ports based on Ford’s 351C-2V. These are ports that give this engine what it needs: velocity at low speed for all kinds of torque. And when it’s time to pin the throttle, you get torque that segues into horsepower at 6,000. Wedge chambers offer the kind of quench Ford chambers never had.
When Trick Flow engineers set out to design these heads, they wanted everything Ford heads didn’t have: exhaust ports raised .100 inch for better scavenging, cooling passages designed for both the Cleveland and Windsor small-blocks, better oil return fl ow, and right-sized intake ports somewhere between 2V and 4V for the perfect balance of low-RPM torque and high-RPM horsepower. Trick Flow decided to build a great street/strip 351C stroker (383 ci) with 3.750 inches of stroke and 4.030-inch bores.
Engine builder Ron Greczanick was enlisted by Trick Flow to build this Cleveland with more than 500 hp. Truly remarkable is the power this engine makes on pump gas and 9.65:1 compression:524 hp at 6,000 rpm and 480 ft-lbs of torque at 4,500 rpm on the Super Flow 902.
Written by George Reid and Republished with Permission of CarTech Inc