[EZWood]

Originally Posted by Hawaiian

It's really quite simple. Durring the 4 previous revisions each part should have been dynoed so they know where the gains were coming from and where each modification was having a result. It's basic practice when you are creating and revising things to do this. How else would you know if that bend you just took out of the downpipe gave you the gains, or maybe it was a different wield joint on the headder.

Also there is this simple thing called a baseline. You cread a baseline by running a vehicle in a base form to create a base run to compare all other runs against. Here's where it gets tricky... YOU DON'T NEED A BARE BONES STOCK CAR FOR THIS.

I know the concept of that might have blown your mind, but you can in fact create a baseline with a car that has had a flywheel and crank pully installed on it. You simply put a stock exhaust on the modified car and run it on a dyno. This creates a NEW baseline to test against. Since the parts that you are testing are different than this model you can then replace what parts, and ONLY THE PARTS IN QUESTION on the vehicle.


When you have replaced the parts you would like to test, you try to recreate every other variable as close as possible to the original baseline. Heat, humidity, number of runs, how warmed up the car was, what dyno was used, number of dyno runs before calculating the average, or cherrypicking the top stat (notice if this is done, you must also pick the top baseline run). This will all affect the final outcome of the dyno. The closer you can get to every external variable the more acurate your test will be.

The question is, did the exhaust create the 40 whp 20 tq as claimed in the initial post by vivid racing, or were the numbers incorrect, and why.

It's basic F@'n science 101 guys. It's not trying to solve why quasars and black holes exist.

I was under the impression that everyone wanted to see baseline runs on a fully stock car, then the individual components, and the full exhaust all in one day within a certain time frame. Please correct me if I am mistaken.