my current exhaust setup is Longtubes-y pipe-3"cutout-3" exhaust into a stock muffler. my question is when i have my cutout open my truck seems a little slower than when its closed and going through the stock muffler. Anyone have any suggesions why this is? maybe not enough power for 3'' exhaust????

 

Wierd. Maybe cause its slow, but when the cut out is open it seems slower cause its so loud and slow?

 

less exhaust restriction = less exhaust velocity = loss in low-end torque.

 

My bad. I didnt mean that like it sounded. I meant it is quick but then you add a ton of sound but still only quick, then it SEEMS slower.

 

lol i know its slow but its really noticeable and annoying at some times

 

Like my truck, it seems pretty quick, but when the cutout is open, I feel like it is making a ton of noise but isnt really moving that fast.

 

[QUOTE=Atomic;4386985]

less exhaust restriction = less exhaust velocity = loss in low-end torque.[/QUOTE
thats something to think about there-makes sense why with it closed it seems to do better off the line. damn maybe a shoulda had it closed at the track last time i was there

 

maybe thats it-i should go test it at my local 1/8th mile and see if theres really a difference off the line

 

I've said it before I'll say it again, a 3" Y pipe is quite big for a stockish 5.3. It may be better once you get the cam in there.

 

Dont listen to him, he has a stock 6.0.

You will be fine with the cam tho. Just like nobody notices gear changes but drop several tenths at the track with gear swaps.