Manifold testing

 As promised, the manifold testing of 4 different manifold is finally complete. There is a fifth manifold that gave me much trouble on the dyno as you will see.
The Manifolds are as follows-

• Stock Kegger with stock throttle body.
• Stage 1 Ported Kegger with 108mm Throttle body.
• Stage 2 Ported Kegger with a 108mm Throttle body.
• M1 2bbl Manifold unported with a 108mm Throttle body.

All done on the same day in Utah.
The 6 pack manifold had issues with my linkage and wasted my time on the dyno chasing that issue. Running out of time, I removed it and installed the M1 2bbl for the final testing.
The baseline is a 1998 Ram, 408ci, 10.3 compression, Stage 1 PIE EQ heads, UTP 220X camshaft, longtubes and tuned by the SCT. Which brings me to my next issue. The Syked tuner was doing well until the software updated automatically and being out of business, it would no longer run. I had to switch a new SCT back on to start the testing a day late than when I had scheduled. As expected the stock kegger choked the 408ci by 51hp and 47 tq. Once the M1 was installed the peak torque jumped from 3300 to 4500. The HP feels great on the top end, but driving it shows a bottom end loss that next months dyno will surely make up for. Keep in mind, this is a 408ci, so a 360 or 318 will be less than these numbers but ramped the same.

• Stock Kegger with stock throttle body. 279hp/335tq
• Stage 1 Ported Kegger with 108mm Throttle body. 332hp/380tq
• Stage 2 Ported Kegger with a 108mm Throttle body. 342hp/400tq 3300 peak tq
• M1 2bbl Manifold unported with a 108mm Throttle body. 361hp/389tq 4500 peak tq

So as you can see, depending upon your application, short runners can make great horsepower and long runners can make great torque. Next month the Procharger Intercooled P1SC is being installed with the M1 and will head back to the dyno.
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