If you run straight pipe from the cat, do you lose tq but gain hp or is it a lose all the way around? Or a gain on both ends?

 

Do you mean no resonator or muffler?

I would think that you would gain a bit of both being as it is a forced induction engine.

 

Straight from the cat. No resonator or muffler. I've done this to my car and it is LOUD. I really don't like it and i it just feels slower because i can't hear the supercharger whine anymore. I can drive by cars and find out if they have an alarm or not.

 

I know the feeling

 

i always liked goin thru parkin garages and setting off car alarms.... the good 'ol days...

 

lol yeah i use the have the m7 exhaust with the megan header and was cool for a while but was just too loud...i still set of alarms with just the m7 and stock header tho

 

I like how the M7 sounds with the megan header catless at high rpms very much like a full race MINI

 

Webb produced that 3" exhaust for a short time, and found it didn't loose much / any torque down low. With forced induction, the less back pressure the better (you still want proper scavenging, so, say, a 6" exhaust wouldn't work well).

 

In theory it won't lose any torque anywhere. However in practice the unaccounted for resonances and scavenging will make a significant impact on exhaust performance, which will change your torque curve.

 

and possibly go deaf of the shear amount of resonance on the interior of the car

 

its because you moved the tourqe range op.. you will defently get more horsepower.. and a little tourqe but only up in the higher rpm´s... I had that same problem when i mowed my cat. Solved that problem by the ECU tuning by RH Motorsport here in denmark... They f... rock

 

I have to roll down my window a bit so the sound of the exhaust won't be so loud in my car. I think i'm going to jump on the volt because it's around my budget.