Originally Posted by +fireamx
Sidez, are you saying that the Mercedes 3.2 engine is notorious for bad exhaust flow? I was not aware of that. But truthfully, I knew very little about these engines to start with.
It just seems that my engine likes to rev pretty quickly, and with the flat torque curve, and the relatively high "max" speed we enjoy, I thought these are usually signs of a "good breathing" engine.
The Arizona company Floored Fabrication discovered that the oem manifolds actually shroud the exhaust ports. This is
never a good thing for flow.
I also 100% agree with Sidez in that using the same design on the supercharged engine is the least bit ideal. It's not like we are pushing 4-6 lbs of boost here - we're cramming 14.5 lbs up to 18 or so.
Originally Posted by Maxwell
...This will tell you if you really need headers or not!
Nobody
needs headers. People want them to increase performance. Will they free up horsepower and torque? Of course they will. When was the last time you saw/read about a header swap that didn't end up increasing both horsepower and torque?
Yes these cars' engines are different but in the end they are air pumps just as every other engine out there so the same principals apply.