Proof of larger DP/ Fluid Dynamics

niterydr · 03-01-2006

A 4" downpipe is cool, but if you have ever been under your car and looked at your oil filter, you would realize that there is no way in hell to get a 4" pipe through there without seriously sacrificing ground clearance.
Also, exhaust gases expand, so should your piping diameter.

rst95eclipse · 03-01-2006

Quote:

Originally Posted by niterydr

A 4" downpipe is cool, but if you have ever been under your car and looked at your oil filter, you would realize that there is no way in hell to get a 4" pipe through there without seriously sacrificing ground clearance.
Also, exhaust gases expand, so should your piping diameter.

Oh there are ways my friend.

Quote:

Originally Posted by slowbubblecar

I don't think it would even be possible for a 4" downpipe unless you were able to move the turbo over towards the tranny a ways or start with a smaller 02 housing.

There are ways of doing this.

Back to the question. It's not about a FULL 4" exhaust. It's questioning if the 4" to 3" reduction under the car is going to cause a bottle neck that would cause a loss in effientcy or if it actually has positive results. Because obviously the best exhaust on a turboed car is no exhaust.