Dual pipe exhaust for 2.4S?

elflamo · 12-23-2007, 12:07 PM

Hi all,

in the Porsche 911 Performance Handbook (Bruce Anderson) it is mentioned that the power of a 2.4S can be lifted to 210 BHP when using a dual pipe sports exhaust.

- which exhaust is this? I have bought an exhaust with outlets both left and right, but I am wondering if the book actually refers to the exhaust with the two parallel pipes exiting in the middle of the exhaust (is this the 'pea shooter'?)
- Has anybody tried this?

Thanks!

Dennis

Eagledriver · 12-23-2007, 12:38 PM

I don't think that number you quote is in the book. His book does show that you can gain about 10 HP with a sport muffler. The dual outlet sport muffler is usually considered to be the "pea shooter" that you reference above. I believe that most dual outlet mufflers will give you this boost.

-Andy

Henry Schmidt · Henry Schmidt's Garage

This one is from M&K

210bhp · 12-27-2007, 08:55 AM

Is it true this type of exhaust works better with carbs than MFI?

Regards
Mike

elflamo · 12-30-2007, 08:05 AM

Andy, check the graph on page 141. Pretty close to 210

Dennis

Eagledriver · 12-30-2007, 09:37 AM

Dennis,

I have the older version of the book so my graph is on page 133. It shows a 10 HP increase at 5500 RPM. The stock curve stops there in the graph at 190 HP. Since the peak HP of the 2.4s motor is around 6200 RPM, this graph shows a stock 2.4 with about 200 HP. The improvement with the muffler is 10HP.

-Andy