mazzuri super headers
#422
Lexus Champion
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Honestly, I would expect that the stock long and short term fuel trims would produce a very lean A/F mixture if the headers were installed then immediately dyno'ed without any significant mileage. Furthermore, I would expect the power curve to change significantly as well. The fact that it didn't change much implies to me that the A/F didn't change much, so I wouldn't expect there to be much gain in a week either. I hope I'm wrong though since I would love to buy a good set of headers.
#424
could you actually run around with both your primary and secondary cats removed and still have an exhaust that belongs on a luxury car? i know the point and purpose of this project is performance primarily, but i'm curious if an aftermarket exhaust that removes the secondary cats with just resonators and the mufflers would be really loud
#428
Lexus Champion
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could you actually run around with both your primary and secondary cats removed and still have an exhaust that belongs on a luxury car? i know the point and purpose of this project is performance primarily, but i'm curious if an aftermarket exhaust that removes the secondary cats with just resonators and the mufflers would be really loud
#430
#432
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The OEM exhuast and y-pipe with the secondaries is more than likely the cause of the restriction now. The dyno shows the torque increasing and then leveling opff at the higher RPMs. I think this vehicle needs an exhaust (full header back) to see the real gains.
But it needs to be driven for a couple of days until the trims adjust themselves. Before it goes to the dyno.
But it needs to be driven for a couple of days until the trims adjust themselves. Before it goes to the dyno.
#433
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The OEM exhuast and y-pipe with the secondaries is more than likely the cause of the restriction now. The dyno shows the torque increasing and then leveling opff at the higher RPMs. I think this vehicle needs an exhaust (full header back) to see the real gains.
But it needs to be driven for a couple of days until the trims adjust themselves. Before it goes to the dyno.
But it needs to be driven for a couple of days until the trims adjust themselves. Before it goes to the dyno.
oh and toptier.. you need to check on a drag strip around you.. if you see some good gains on the dyno.. who knows.. you might be able to pull the fastest time at the track..
#434
Lexus Champion
iTrader: (1)
The OEM exhuast and y-pipe with the secondaries is more than likely the cause of the restriction now. The dyno shows the torque increasing and then leveling opff at the higher RPMs. I think this vehicle needs an exhaust (full header back) to see the real gains.
But it needs to be driven for a couple of days until the trims adjust themselves. Before it goes to the dyno.
But it needs to be driven for a couple of days until the trims adjust themselves. Before it goes to the dyno.
#435
I won't be seeing any good times up here at a mile high