2004 Modifications
A nose job was first on the list. We are pretty confident that turbulent intake air created problems for us in 2003. to clean up that situation a straight scoop was added to the truck, it directs air into a larger air box which encompasses the entire upper hood area.
The rear fenders were changed, we disposed of the steel fenders which had been salvaged from several original fenders and installed a set of bobbed fiberglass fenders.
Data Collection
It's one thing to tune the engine in the pit, or on the dyno, but quite another to find out what is going on as the truck struggles through near 200 mph air. To give our crew a better idea of what was going on we added a data logging system to the truck.
Our system is made up of a Cambell Scientific 21X Data Logger and Innovate Motorsports O2 sensor. The 21X is a retired weather Station unit which once upon a time recorded weather conditions for the US military in Alaska. We're running it as quick as it can go, logging exhaust gas temperatures on all eight cylinders as well as rpm and wheel speed.
For 2004 the engine was configured almost identically to 2003;
Engine: 439 in**3 BBC, 6.7 in. rods; pistons coated for thermal & friction
Compression ratio:12.2 Carb: 1250 cfm Holley Dominator
Cam: Lunati 283/289 deg @ .050 installed at 0 deg advance
Headers: 2003 Bonneville; 2 3/8X32”
