Exhaust tail pipes

Michael Smith · 10-05-2003, 05:31 PM

I just put in some turndown tips on my flowmasters before the rear axle. so no more tail pipes all the way back. The sound is louder in the car but thats ok, my question is anyone who has done this before have you experienced any vibration after doing so; and did you lose any low end torqe? The exhaust system is
1 5/8 shorty headers, 2 1/2 h-pipe no cats, 2 chamber flows with the turndowns directly on the muffler facing down. thanks for any input.

VeNuM · 10-06-2003, 12:26 PM

I ran the exact same setup previously and had a very slight vibration and noticed miminal low end torque loss. Sounds really mean too! ~Brian

QuantumMotorsports · 10-06-2003, 02:02 PM

As a general rule, any time you lessen the back pressure in an exhaust system, you loose low end torque and gain high end horse power, so a little back pressure is good for most stock engines. When you cut the pipes off, all of the bends and the friction on the wall of the pipe causes backpressure, you just lost all the backpressure behind the muffler so yeah, you can expect a small loss in low end torque. It's all good, take it to the track and see how it runs, your car may do better with more low end, depends on the setup.

Michael Smith · 10-06-2003, 07:30 PM

Thanks all for the reply.

10-05-2003, 05:31 PM	#1
Michael Smith Registered Member Join Date: Feb 2003 Location: Washington Posts: 33	Exhaust tail pipes I just put in some turndown tips on my flowmasters before the rear axle. so no more tail pipes all the way back. The sound is louder in the car but thats ok, my question is anyone who has done this before have you experienced any vibration after doing so; and did you lose any low end torqe? The exhaust system is 1 5/8 shorty headers, 2 1/2 h-pipe no cats, 2 chamber flows with the turndowns directly on the muffler facing down. thanks for any input.

10-06-2003, 12:26 PM	#2
VeNuM Registered Member Join Date: Apr 2002 Location: Downers Grove, IL Posts: 464	I ran the exact same setup previously and had a very slight vibration and noticed miminal low end torque loss. Sounds really mean too! ~Brian __________________ 1989 Black Mustang GT Hatchback, Underdrive Pulles, Electric Fan, Cold Air Intake, Headers, Offroad H-Pipe, Magnaflow catback, Steeda Tri-Ax, Fluidyne Aluminum Radiator, Timing at 14*, 3.73's Coming not so soon: 408w Ricer Hater's Club Member #59

10-06-2003, 02:02 PM	#3
QuantumMotorsports Registered Member Join Date: Jul 2000 Location: Norman, Oklahoma, USA Posts: 597	As a general rule, any time you lessen the back pressure in an exhaust system, you loose low end torque and gain high end horse power, so a little back pressure is good for most stock engines. When you cut the pipes off, all of the bends and the friction on the wall of the pipe causes backpressure, you just lost all the backpressure behind the muffler so yeah, you can expect a small loss in low end torque. It's all good, take it to the track and see how it runs, your car may do better with more low end, depends on the setup. __________________ Michael Black QuantumMotorsports Norman, OK 1984 LX Hatch 306 w/ TRW forged flat toppers, Comp Cams Magnum 292H, GT40P heads w/ 3 angle valve job, .550 lift springs, Angus Racing Roller Rockers, Weiand Stealth Intake, Holley 4150 650cfm carb, MAC 1 5/8 Long Tubes, Single Chamber Flowmasters, 91' T5 w/ Pro 5.0 shifter, Turbo Coupe 8.8 Rear w/ 3.55 gears, QA1 Motorsports tubular K member, no interior except steering wheel and seat. Coming soon: 6 or 8 point cage, Fuel Cell, Weld Draglites

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10-06-2003, 07:30 PM	#4
Michael Smith Registered Member Join Date: Feb 2003 Location: Washington Posts: 33	Thanks all for the reply.