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."

Power Play

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
Bore 3.720 inches
Stroke 4.700 inches
Displacement 409 cubic inches
Compression ratio 11.4:1
Camshaft Custom Comp Hydraulic Roller
Valve lift 0.625 inch
Duration 230 degrees at 0.050
Rocker and ratio Comp 1.8:1
Piston rings Total Seal 0.043 x 0.135 3 mm
Piston Diamond Forged
Block OEM Production Aluminum 5.4 M54A
Crankshaft Bryant
Rods Eagle 6.658 inches
Cylinder head Ford GT
Chamber Volume 59 cc
Intake valve diameter 1.510 inches
Exhaust valve diameter 1.260 inches
Intake manifold Cobra R
EFI FAST DFI
Header Kaase 16-Pipe
Ignition MSD
Damper Innovators West

ON THE DYNO
409-Cubic-Inch Ford Four-Valve
Jon Kaase Racing Engines
DTS Powermark Engine Dyno
Tested at UNOH
RPM Torque Horsepower
3,000 515.1 294.2
3,100 556.2 328.3
3,200 576.2 351.1
3,300 592.7 372.4
3,400 608.2 393.7
3,500 616.3 410.7
3,600 615.6 421.9
3,700 615.3 433.4
3,800 621 449.3
3,900 631.5 468.9
4,000 643 489.7
4,100 652.3 509.2
4,200 658.1 526.2
4,300 657.9 538.6
4,400 654.6 548.4
4,500 651.3 558
4,600 649.7 569.1
4,700 651.5 583.1
4,800 655.3 598.9
4,900 660.1 615.9
5,000 664.3 632.4
5,100 665.9 646.6
5,200 665.2 658.6
5,300 658.9 664.9
5,400 652.8 671.2
5,500 645.9 676.4
5,600 639.5 681.9
5,700 633.7 687.7
5,800 627.2 692.7
5,900 622 698.8
6,000 617.3 705.2
6,100 612.1 710.9
6,200 606.2 715.6
6,300 599.3 719
6,400 590.8 720
6,500 580.3 718.2
6,600 567.5 713.2
6,700 552 704.2
6,800 536.2 694.3
6,900 519.7 682.8
7,000 505.6 673.8

SOURCE
AMSOIL
925 Tower Ave.
Superior
WI  54880
800-777-8491
http://www.amsoil.com
Jon Kaase Racing Engines INC.
Winder
GA  30680
770-307-0241
http://www.jonkaaseracingengines
.com
VP Racing Fuels
P.O. Box 47878
San Antonio
TX  78265
210-635-7744
http://www.vpracingfuels.com