While the Kaase mod motor is an extraordinary piece in just about every aspect, the crowning achievement has to be the unique "16-pipe" exhaust headers. The system takes advantage of dual primary tubes from each cylinder, a setup we confess to have never seen on any V-8 engine. Kaase tells us, "I got the idea looking at a Buell V-twin racing motorcycle. At first glance, seeing the four pipes, I presumed it was a four-cylinder, and looking closer I realized it was a twin. It was a system that I felt could be put to use on the Ford four-valve. I had only built one set of headers decades ago, but something like this was interesting enough to try. My first set was based on the idea of using a long and a short primary on each port, looking to produce a wider tuning window, but it didn't really work out compared to a conventional header. The final design proved to be functional in testing, showing advantages at certain rpm points compared to a more conventional header. Actually, there were quite a few further variations I would have like to have tested, but the time was not available. You could play around with something like this forever."
Delivering the airflow to the heads is a rare 2000 Cobra R intake manifold, which is a two
There's no doubt that a Kaase mod motor is an unusual engine combination. With a displacement bigger than any other V-8 mod motor, a huge stroke and tiny bore, four cams, 32 valves, 16-pipe primary headers, a factory intake with injectors shooting up toward the plenum, all based on a stock Ford block and heads, and turning an essentially factory valvetrain, this thing was an enigma. At the 2013 AMSOIL Engine Masters Challenge, Kaase's radical mod held a crowd of onlookers simply slack-jawed at its sight. That astonishment continued as the engine went into the dyno test cell and began spinning out power. At the bottom end, the numbers were staggering, with more than 600 lb-ft of torque on the dial at just 3,400 rpm. That, folks, is an outstanding level of torque at peak for an engine of this displacement. The dyno's strain gauge kept stretching up to a peak of 666 lb-ft at 5,100 rpm. The resultant specific output of 1.63 lb-ft per cubic inch is unheard of, especially considering an 11.5:1 pump-gas engine. Convinced that a four-valve mod can indeed make torque?
On the power side of the equation, 720 peak horsepower was recorded, equally impressive considering the engine was built for the broadest possible power curve at the EMC competition. Kaase had already seen well over 800 hp in pre-event testing with a combination favoring top-end output. Still think you need a blower to make power from one of these mod Fords? Think again. Frankly, the Kaase mod gathered up all of those preconceived notions about these modern Fords and annihilated them in an incredible display of pure engine power, taking his fifth AMSOIL Engine Masters Challenge Championship in the process.
|BY THE NUMBERS
|409 Ford Modular Four-Valve
||409 cubic inches
||Custom Comp Hydraulic Roller
||230 degrees at 0.050
|Rocker and ratio
||Total Seal 0.043 x 0.135 3 mm
||OEM Production Aluminum 5.4 M54A
||Eagle 6.658 inches
|Intake valve diameter
|Exhaust valve diameter
Kaase experimented with injector position, looking for an edge in power. The final arrange
Kaase had high praise for the FAST XFI injection system. With the distribution difficultie
What may go unnoticed is the level of detail that went into making this not only the world
|ON THE DYNO
|409-Cubic-Inch Ford Four-Valve
|Jon Kaase Racing Engines
|DTS Powermark Engine Dyno
|Tested at UNOH