Silencer Restriction On Exhaust

[LTHL34]

Hey guys,

I have done a search and not found anything on how much a silencer restricts an engine? Do you have a big power loss? Or do you only get restricted when you put more power into a car?

Cheers

[Dale FZ1]

I have a Blitz Nur spec rear muffler, with removeable baffle.

Baffle in = 279 rwhp

Baffle out = 302 rwhp

No other changes, and back to back dyno runs. More grunt everywhere through the entire range. The top end does not die off either. More noise everywhere too, and an annoying drone on cruise with it de-restricted.

So yes, restriction costs power.

[LTHL34]

I have a Blitz Nur spec rear muffler, with removeable baffle.

Baffle in = 279 rwhp

Baffle out = 302 rwhp

No other changes, and back to back dyno runs. More grunt everywhere through the entire range. The top end does not die off either. More noise everywhere too, and an annoying drone on cruise with it de-restricted.

So yes, restriction costs power.

I have got the Blitz Nur Spec R exhaust and i noticed that without the silencer it would hit R&R but with it in, it would be very smooth.