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#1 |
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Join Date: Aug 2004
Location: Somerville,New Jersey
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I am considering installing an X-pipe exhaust system(without mufflers) on a Chevelle with a SBC.Now I am using headers with bullet mufflers.I have read that I will pickup HP,but will there be any performance gains after adding the extra weight of the new exhaust system?
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#2 |
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We picked up .3 in the eighth with a flat top, 336 69 nova, with cast manifolds. The weight did not hurt it. Would expect something even with headers. Someone else may have more input.
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#3 |
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My car runs .1-.15 faster in the 1/8 with 3" x pipe and mufflers with turndowns, than with open headers. There's something to that technology I guess
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#4 |
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Had bullets about mid car. Went to full exhuast out the back with x-pipe in proper location. Gained 45 lbs weight and picked up .04 et. sbc
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#5 |
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Jeff, how can you be sure about four hundredths, week-to-week. Surely you didn't back-to-back that system at the track, same day?
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#6 | |
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Remove the system and run open headers with a collector extension, add 40lbs of lead and the car runs .10 slower et and 1.5 mph slower. That was a back to back test, within 45 minutes. I have done this several times. X pipe and mufflers, would not leave home without them. |
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#7 |
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Location: Somerville,New Jersey
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OK, I'm sold on the benefits of the X pipe.Should I use my bullet mufflers or just turn downs? Or test both combos?
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