Blow By Racing Ford Mustang Ported Heads and Camshaft - Three-Valve Velocity

Now That we're more than 10 years deep into the realm of modular motivation, we find ourselves a bit friendlier with the overhead cam design of the latest Mustang powerplants. This translates into more aggressive research and development of performance parts for these engines.

That being said, it's no surprise people have already torn apart the Three-Valve Mustang 4.6 to find more power. Yes, the factory has still left something for the aftermarket to discover, and Boca Raton, Florida's Blow-By Racing has found it in the form of CNC-ported cylinder heads and performance camshafts.

Looking to maximize the available horsepower, Blow-By proprietor Chris Jones started off with a heavy Stage 2 CNC-port job on the stock Three-Valve heads, and aggressive Stage 2 camshafts, the specs of which were not divulged.

This combination, along with a fully worked exhaust system and tuning, resulted in 382 rwhp and 346 lb-ft of torque as installed on the com-pany's LNR prototype Mustang. On race gas with a radical tune, BBR saw 409 hp and 361 lb-ft of torque.

BBR's Stage 1 cylinder head is in develop-ment, but we were able to test the Stage 1 camshafts with the Stage 2 cylinder heads. The Stage 2 heads for '05-'06 Mustang GTs retail for $1,699.95 and use the stock valvetrain. Stainless steel valves and upgraded springs are optional.

Stage 1 BBR camshafts are available as regrinds ($825.00) or in billet form ($999.99). For our test, we employed the reground Stage 1s.

The Blow-By Racing team takes...        read full caption The Blow-By Racing team takes S197 Mustang GT performance to new heights.	BBR offers two stages of CNC-porting...        read full caption BBR offers two stages of CNC-porting for the three-valve Ford cylinder head, and two stages of cams. We used the Stage 2 head in this test (the Stage 1 is still in development), along with Stage 1 camshafts.	BBR uses the stock valvetrain...        read full caption BBR uses the stock valvetrain and hardware, but offers stainless Manley or Ferrea valves and Comp Cams springs as options.
These heads feature the more...        read full caption These heads feature the more aggressive Stage 2 CNC porting. Blow-By has a milder Stage 1 port configuration in development, which should be available soon.	Installing the heads and cams...        read full caption Installing the heads and cams begins with disconnecting the battery, followed by removal of the airbox and intake tube.	The fuel lines and rails are...        read full caption The fuel lines and rails are next. You can pull the injectors at the same time, leaving them hanging out of the rails.
	Free both wiring harnesses...        read full caption Free both wiring harnesses from the intake manifold and injectors, and pull them away from the valve covers.	With the harnesses and fuel...        read full caption With the harnesses and fuel lines off, remove the intake manifold.