- Joined
- Feb 27, 2009
- Messages
- 5,639
- Reaction score
- 516
- Location
- Kailua-Oahu, Hawaii
- What engine do you have?
- V6 engine
- What year is your Sport Trac?
- 2005
- What Generation is your Sport Trac?
- 1st Gen Owner
Replaced the "teapot" spout with a 2.50" pipe and 2.75" inside rolled tip, out the rear.
Inside of the tip is not completely rolled over and has a sharp edge.
Happens when accelerating under a load, never in neutral.
Only engine mods are a throttle body, drop in filter, and air silencer removed.
Belts, alternator, hoses, etc., all seem OK. Stock resonator is still installed.
Never heard this until I changed the exhaust pipe and tip, almost a "supercharged" sound.
Please no "whistling exhaust tip" or "happy whistle" jokes, heard one too many. Thanks. :banghead:
EDIT- Almost a year later the culprit was caused by my OEM serpentine belt.
Replaced it with the half inch shorter Gates K060860 and the "whistle" is gone. :banana:
Inside of the tip is not completely rolled over and has a sharp edge.
Happens when accelerating under a load, never in neutral.
Only engine mods are a throttle body, drop in filter, and air silencer removed.
Belts, alternator, hoses, etc., all seem OK. Stock resonator is still installed.
Never heard this until I changed the exhaust pipe and tip, almost a "supercharged" sound.
Please no "whistling exhaust tip" or "happy whistle" jokes, heard one too many. Thanks. :banghead:
EDIT- Almost a year later the culprit was caused by my OEM serpentine belt.
Replaced it with the half inch shorter Gates K060860 and the "whistle" is gone. :banana:
Last edited by a moderator: