Hey Guys,
Time for me to draw from the wealth of knowledge out there...
I finally got a header for my car this season... a Hotshot that I modified extensively at the collector to clean up the merge area...
I installed it in my '97 240SX (completely ITS legal KA24DE... right down to the legal, bone stock 95-98 cams, etc...) using 2 1/4" pipe from collector to tailpipe... In the factory location, I placed a 12" Dynomax Bullet style muffler in 2 1/2".
While I definatly have some power gains and the accelleration is noticably improved, the darn thing sounds like a Massy-Fergusen Tractor!
I'm not sure if this is normal for these, as the previous Non-IT motor I had in the car had a 12:1 motor with different cams, so it had a higher pitched and more "revvy" exhaust note...
I pulled the muffler off tonight to see if that was the cause, but it just made the same crappy sound, only louder...
The engine runs well, though comments have been made that it sounds "flat" with this exhaust... The motor has about 9-hours of race-weekend driving on it, so it's just getting broken in... Compression works out to about 200psi on a compression check across all cylinders (stock bore, lightly cleaned-up head, etc...)
Is the pipe too small? Is this the way these things sound?? I was kind of hoping for more of a "tuner" 4-cylinder revving to 7000 grand sound...
Any thoughts?
I'll post some links to some movie files shortly where you can hear for yourself...
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Darin E. Jordan
SCCA #273080, OR/NW Regions
Renton, WA
ITS '97 240SX
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