Weird noise in exhaust

Maxpowers · Apr 8, 2011

singlecamdude said:
And by the way the car was 9 lbs and I up graded to 18 lbs I bought the pulley at Murrays speed and custom

Did you tune the car after the upgraded pulley?

If you truly did hit 18 lbs of boost (assuming you did not) without a good tune; that would be your motor noise and exhaust backfire. Something is destroyed in your motor.

trinity_gt · Apr 8, 2011

Maxpowers said:
Did you tune the car after the upgraded pulley?

If you truly did hit 18 lbs of boost (assuming you did not) without a good tune; that would be your motor noise and exhaust backfire. Something is destroyed in your motor.

Bolt-on pulley + no tune + no intercooler == internal obliteration...

singlecamdude · Apr 8, 2011

The car has been tuned after the pulley upgrade but I did that 4 years ago

Maxpowers · Apr 8, 2011

singlecamdude said:
The car has been tuned after the pulley upgrade but I did that 4 years ago

How many miles have you put on the motor since the tune?

What type of supporting mods did you have done to the motor?

If you really did push that much boost on a stock motor, I would start looking for another motor.

midnightdriver · Apr 8, 2011

singlecamdude said:
And by the way the car was 9 lbs and I up graded to 18 lbs I bought the pulley at Murrays speed and custom

What size is your pulley that you bought? Stock is 3.60" which is between 8 to 10psi. Are you 6 rib belt?

singlecamdude · Apr 8, 2011

2.70 the car is six rib but the pully on th sc is 8 rib

singlecamdude · Apr 8, 2011

Here's the pic

midnightdriver · Apr 8, 2011

Why are you running an 8 rib pulley when the rest is 6 rib? You know that the belt is still slipping a ton right? To get the advantage of an 8 rib traction you must run all 8 rib pulleys.

Belt looks a little worn too, probably from slipping. If I were you, I would sell the 8 rib pulley and get a 3.33" or even bigger 6 rib pulley and a GOOD tune. I would shoot for 10 to 12 psi max. Having non-intercooled is causing your computer to pull a lot of time, the more boost you have, due to the IAT sensor reading hot air temps, hopefully located in the charger pipe. You will make about the same amount of power, with less worry.

My last .02

singlecamdude · Apr 8, 2011

When I went to to get the pulley it took one month for Murray to get it they gave me the run around so I just kept it and actually the belt is new I just put with the tensioner

singlecamdude · Apr 8, 2011

Intercooler is on my to do list

Weird noise in exhaust

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