Here's the finished look with...
Here's the finished look with the 7-year-old tti tailpipes joined to the X-pipe and the Ultra Flos. This is the exhaust configuration for our return test-and-tune that was faced with worse weather conditions. The tailpipes lowered the decibels a few points and reduced interior noise to a more tolerable level for the 90-minute ride to-and-from E-Town. Running without tailpipes on a street-driven car is not a healthy idea.
- 67 R/T
- 030 over 440, 950 Holley HP, MP Ml intake, ported Edelbrock heads, Comp Cams .575 lift street roller cam
- 3.73 gears
- 9 1/2-inch converter
- 2-inch tti headers and 3-inch exhaust,
- 30X9-15 Hoosier radial slicks, 26-inch front runners
- 3,880-3,910 test pounds
- 2,000-rpm launch w/6,300-rpm up-shifts, 5,900-6,000 trap rpm.
|1.||H-pipe w/Super Turbo's||77 degrees||1.60||11.15||121.10||93|
|2.||H-pipe w/UItraFlo's||79 degrees||1.57||11.01||122.39||100|
|3.||X-pipe w/UltraFlo's||82 degrees||1.56||11.02||121.80||97|
|4.||X and Ultras w/TP's, retest||85 degrees||1.56||11.11||121.10||95|
|5.||#76 secondary jets||86 degrees||1.59||11.17||120.62||95|
|6.||#80 secondary jets||88 degrees||1.58||11.15||120.88||95|
*Sound meter was held 50-feet from the burnout box.
Decibel reading was from a steady 5-second, 5,000-rpm burnout.