The vehicle tested on the dyno sheet below came in bone stock.  Run 58 (black line) is the graph of the stock horsepower.  We installed the following modifications:

-cam, lifters, valve springs, and roller rockers

-dual plane performance intake manifold

-holley 670 carb

-long tube headers

-2.5" dual exhaust with cat

-performance hei ignition

After the modifications were installed and the cam was broken in, we did the first dyno pull which is run 60 (blue line).  Everything was set just as it came out of the box.  Timing was set at the factory spec 8 degrees btc.  This is where most people and shops would leave the performance upgrade although they may advance the timing some.  While you can see it made an increase in horsepower, most people have no way of tuning the vehicle properly.  By changing timing and carb adjustment step by step, we were able to achieve the results shown by run 76 (yellow line).  By tuning the setup in on the dyno, we knew exactly what timing produced the best horsepower safely and were able to watch the air/fuel ratio to perfectly tune the fuel system.  It is nearly impossible to duplicate this level as tuning on the street.  Lots of enthusiasts enjoy installing and modifying their own cars.  When you are done, bring it to the Little Power Shop to make sure your project achieves results as good as we did below.

Little Power Shop

       Tuning a 350 Chevy