E=MC2
While we were able to increase our SR20's displacement slightly, and forcibly introduce more air and fuel into it, it wouldn't have been enough to put it on par with giants like Lowrider's small-block Chevy once boosted. With all things equal, large displacement engines with more combustion events per revolution (more cylinders) always make more power than smaller engines... but things are not equal, and all their added mass becomes a limiting factor as these engines' speeds increase. Smaller engines with less rotating mass can easily spin to higher RPM, and we knew that making big power with our SR20 meant not only stuffing its cylinders with as much air and fuel as possible, but keeping it all moving at a much higher engine speed than the other guys.
Tomei
-280/280 camshafts
-Solid Pivot Kit
-Rocker Arm Stoppers
Factory SR20 hydraulic lifters have a tendency to "bounce" over aggressive cam lobes at high engine speeds; so much so, that the entire rocker arm assembly they're a part of can completely break off and cause serious damage to cylinder head components. Replacing the factory hydraulic lifters with a Tomei Solid Pivot kit kept lifters firmly planted against lobes, and adding Rocker Arm Stoppers kept the assembly from lifting too far.
www.phase2motortrend.com
Supertech
-1mm-oversized stainless steel intake and Inconel exhaust valves
-Bronze valve guides
-Double valve springs
-Titanium retainers
www.supertechperformance.com
RC Engineering
-550cc primary fuel injectors
-1,200cc peak and hold secondary fuel injectors
Increased airflow requires increased fuel, and the amounts our SR needed at high boost were simply too far removed from what was needed at idle to be adequately supplied by only four injectors. Four 550cc primaries handle idling and low-RPM duty, while four more 1,200cc secondaries come online under boost, to provide all the fuel we could ever need.
www.rceng.com
G-Dimension
Custom intake manifold fabrication
If you think you can modify an OE intake manifold to accept four additional injectors, a modified throttle body, and increased flow while still remaining strong under high boost-think again. Thanks, Stephen, for one of the baddest manifolds ever to grace an SR!
www.g-dimension.com
Ross Machine Racing
-Fuel injector bungs
-Custom fuel rails
-Plenum extrusion
-Velocity stacks and miscellaneous intake manifold parts
www.rossmachineracing.com
Headgames Motorworks
-Cylinder head porting
-Intake manifold port-matching
-Combustion chamber finishing
-Complete valvetrain assembly
Equally as important to a quality engine build as reinforcing its block to hold power, is machining its head and its periphery components to produce it. Don't just think you can order a bunch of parts and throw 'em together - having an experienced professional handle tasks like valve machining and seating, head porting, and manifold port-matching is one of the best investments you can make.
www.headgamesmotorworks.net
Human Resources
The most important ingredients in any significant engine build are experience and action. Parts and resources don't create a finished product; hard work does. For each step of our SR's build, we enlisted the help of only the best: Mark, Jay and Pat of the Mazworx crew; Dave, our cylinder head guru at HeadGames Motorworks; Mike and the Speed-O-Motive team; Battleversion front-man and fabricator Alex Pfeiffer; and finally, James and Leon Chang and Stephen Rhim of G-Dimension for their tireless hard work planning a battle strategy, arranging parts and services, reaching into their pockets for whatever fell outside budget, fabricating what could not be bought or bartered, assembling, wiring and tuning the SR in-house, and getting their hands dirty every step of the way. We absolutely could not have done it without their expertise and selfless dedication. Any hotties' phone numbers should be immediately forwarded to them!
By Luke Munnell
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