Exhaust/back pressure problems?

91 Supra · 12-23-2005, 01:26 AM

Hey, does anyone know why my 1991 Supra[turbo][automatic] became really sluggish after having a cat-back exhaust installed?{exhaust specs: 2 1/2 in. pipe w/ super 40 flowmaster muffler}. I lost alot of low rpm torque and my car's velocity at around 55MPH takes longer to hit 80s or 90MPH. I nearly have to floor it for it to get going. it doesnt have the power and torque it had b4 when I had the stock exhaust system . Should I install a cold air intake? boost my turbo from stock 6-7lb to 14-15lb? install a down pipe? please let me know

Bullz_EyE · 12-23-2005, 01:53 AM

Arrrggghhh. Wrong muffler for a turbo vehicle, replace it with a straight through design. Have you seen the inside of that muffler?

12-23-2005, 01:26 AM	#1
91 Supra Stock Join Date: Dec 2005 Location: Goleta Posts: 24	Exhaust/back pressure problems? Hey, does anyone know why my 1991 Supra[turbo][automatic] became really sluggish after having a cat-back exhaust installed?{exhaust specs: 2 1/2 in. pipe w/ super 40 flowmaster muffler}. I lost alot of low rpm torque and my car's velocity at around 55MPH takes longer to hit 80s or 90MPH. I nearly have to floor it for it to get going. it doesnt have the power and torque it had b4 when I had the stock exhaust system . Should I install a cold air intake? boost my turbo from stock 6-7lb to 14-15lb? install a down pipe? please let me know

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12-23-2005, 01:53 AM	#2
Bullz_EyE 3" Exhaust Join Date: Oct 2005 Location: San Diego, CA Posts: 238	Arrrggghhh. Wrong muffler for a turbo vehicle, replace it with a straight through design. Have you seen the inside of that muffler?