mstw

I've had the Spoon exhaust for almost a year now. I like it's sound and power, especially in VTEC range. Low end still sucked, but now with the Mugen header - not anymore

Today, 3rd day after I had the Mugen installed, I redlined a few times on my way to work and noticed the car didn't pull as hard at high-end as it did before the Mugen. I am guessing the added torque in midrange filled in the gap and smoothed out the transition from low to high. But, I am just wondering could this new set-up be losing power...

Does anyone have a dyno chart with the same or similar set-up? and how do u like the performance changes?



Mike

ultimate lurker

The Mugen does lose a little power above 8000 rpm. Combined with the increased midrange, it can feel weaker up top.

UL

mstw

Thanks, UL. Does this change the shifting point?

edit:

I heard a hissing noise only during acceleration coming from catalytic converter. It's audible around 3000-4000RPM even with the Spoon exhaust. I checked for air leaks by blowing cigarette smoke around the connection points and didn't see anything unusual...

Where could the noise be coming from?

S2Thizzle

I heard the same hissing noise when I installed my Toda header. I can't tell if it's coming directly from the cat, though.

ultimate lurker

The noise is from the header itself. The stock header is dual walled which keeps the noise down more than aftermarket pieces. Don't worry, everyone hears it, you get used to it.

With a Mugen header, you do usually want to shift a little sooner starting on the 3-4 shift (for most cars). 3-4 needs to occur around 8700-8800, 4-5 at 8700 and 5-6 at 8700.

UL

mstw

wow! there's nothing like driving the car free of worries

Thank you very much, UL