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09-07-2010, 12:16 PM | #1 |
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Car actually seems faster w/ OEM xpipe and cats
So as many of you know I've had about 7 different systems / combinations of exhaust systems on my car. Now, hopefully my final and most recent combination is only an Akrapovic slip-on. I'm back to stock cats and xpipe, after just having the system combined with Fabspeed xpipe and HFC's. To be honest the car really seems to be faster now and must be making a little more torque in the lower RPMs (where on the street 95% of my time is spent). I say it seems faster cause I notice traction control kicking in all the time now as I accelerate cause the rear tires are trying to spin. This didn't happen nearly as often with aftermarket xpipe on. It's not due to loss of tread on rear tires as they are fairly new too. I'm thinking the full systems only really help you out at the very high RPM ranges and slow you down in the lower ones.
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09-07-2010, 01:22 PM | #2 |
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No offense, but that's why people dyno their cars instead of relying on what they feel. As you know, back to back dynos with the stock system vs. HFCs/x-pipe show increase or equal performance across the entire range, so I don't see how what you're saying would be possible. Unless all these dynos are cooked. Only exception is the untuned full Akra which shows a slight loss of power in a small part of the band.
Tires do require a break-in period FYI, so they will actually provide less traction when new...so that could be part of it. |
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09-07-2010, 02:43 PM | #3 | |
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09-07-2010, 02:46 PM | #4 |
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Mine doesnt feel slower or faster, but after removing the HFC the car feels MUCH smoother in acceleration.
All in my head? Perhaps but ill take it.
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09-07-2010, 06:14 PM | #6 |
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You'd be hard pressed to find dynos that start at less than 4K rpm, so OP has a point. Besides, it's a well known fact you're going to give up low-end torque for top-end HP with a full system; the only question left is how much. And yes, most folks know this, so it shouldn't come as a surprise . Good day.
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09-07-2010, 07:09 PM | #8 | |
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09-07-2010, 07:27 PM | #9 |
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09-07-2010, 07:52 PM | #11 |
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Well my car is street driven so I don't spend as much time at top of the rpm band as the lower rpms so the little extra torque down lower is better for me than the extra few hp up top. Plus I now pass inspection with no issues.
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09-07-2010, 08:00 PM | #12 |
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Was a tad louder than I wanted for my daily driver. Also didnt care for the check engine light then kept coming and going. Guess im just becoming a wussy the older i get.
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09-07-2010, 08:39 PM | #13 | |
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What exhaust you running now? |
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09-07-2010, 08:40 PM | #14 |
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Eisenmann sport but kept the fabspeed xpipe with stock cats.
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09-07-2010, 09:01 PM | #15 |
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With very little restriction in the exhaust system, you will definitely lose some low end torque. Overall horsepower might shows gains but torque is a different story. It's difficult to find the combination that not only will increase hp but torque as well.
I hope the akrapovic full system does so because they cost a pair of kidneys. |
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09-07-2010, 10:14 PM | #16 | ||
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09-08-2010, 04:54 AM | #18 | |
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09-08-2010, 11:23 AM | #20 |
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Stock, never had a tune. Didnt want to mess with it.
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09-08-2010, 11:37 AM | #21 |
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stock, wouldn't dare mess with the ECU for a couple of HP. and unless I was racing stop light to stop light that couple HP means very little. wouldn't risk voiding my warranty over that or want to deal with shipping ECU somewhere and then having to worry about doing it again if I should need some dealer updates that over writes my software.
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