In 1968, the 429 superseded the 427 as Ford’s premier big-block, replacing the heavier FE-series. With a 4.36-inch bore and shorter 3.59-inch stroke than the 460, the 429-cu-in Cobra Jet promised at least 370 hp thanks to its snappy 11.3:1 compression ratio, and it became the go-to power plant for the late-’60s Fords.
How much horsepower does a 429 Super Cobra Jet have?
The 429 Cobra Jet was advertised as having 370 horsepower at 5400 RPM and 450 lbs-ft of torque at 3400 RPM.
What makes a Super Cobra Jet engine?
The 428 Super Cobra Jet version was offered as a Drag-Pack option. It utilized a shaker hood scoop, temperature decreasing engine oil cooler, modified crankshaft, and stronger connecting rods for high-end revving. The powerful engine was backed by a four-speed manual transmission that fed into a limited-slip rearend.
What is a Boss 429 engine worth?
According to Hagerty’s valuation tool, a Boss 429 is worth $200,000 on average. Even in “fair” condition, they can go for over $140,000.
How do I know if my Cobra is a 429?
If you see a “4U” or “4UA” marking, you’ve found a 429 crank with 3.590-inch stroke. If you see “2Y” or “3Y,” you’ve found a 460 crank with a 3.850-inch stroke. A 429 Cobra Jet or Super Cobra Jet crank will have a Brinell hardness-tested dimple mark in the first counterweight.
Is the Boss 429 a good engine?
The production Boss 429 was setup for high speed racing and though it packed a heavy punch it was the 428 CJ and SCJ that were faster in the quarter mile due to being setup for better off-the-line performance. Since the 428 CJ and 428 SCJ were part of Ford’s FE big-block V8 family, the CJ and SCJ were very sturdy and reliable engines.
What is the difference between a 428 and a 429 Mustang?
The Cobra Jet 428 motors in Mustangs used heads from the 427, plus other enhancements to really put some hair on their chest. But, from the factory it was never as powerful as the (solid lifter) 427. The 429 was not produced until 1969.
What is the difference between a 428 CJ and a 385?
Plus they were made in considerably higher production numbers than the 429 CJ/SCJ. All one needs to do is check the record books throughout history. 428 CJ has always been quicker and faster. 385 was never given the attention as a performance engine from FoMoCo.
How many valves does a 428 Super Cobra Jet have?
Two were offered for 428 Super Cobra Jet before and after that date. The 428 CJ cylinder heads featured an un-machined chamber of 73-76cc, 2.06″ intake valves and 1.66″ exhaust valves. The intake ports measured 1.34″ x 2.34″. Exhaust ports measured 1.28″ x 1.84″.
