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Forced Induction Turbo, Supercharger, Methanol, Nitrous |
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01-05-2017, 02:22 AM | #1 |
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How much power can you get on stock exhaust with turbo?
I'm about to chuck a gtx2867r snail on my beast.
I'd love to know how much power I can push through the stock exhaust/pipes and what psi as I need to pass an emissions test. . I'm looking to get 280-300hp Ideally I'd want 3" all the way back. |
01-05-2017, 08:34 AM | #2 |
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I still have a stock catback on mine. 3" to it though. I'm at 277 whp on 10psi with a GT2871r. I know it's a restriction. Full stock exhaust would be awful.
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01-05-2017, 08:54 AM | #3 |
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I see a lot of people from Australia worrying about not passing emission test.
Have you guys ever thought about just throwing the stock catback onto the car for inspection? :P that way you can still mod the car as you wish to.
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01-05-2017, 01:15 PM | #5 | |
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Quote:
Legal for emissions but possibly not legal for noise depending on where you are and what catback you run.
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01-05-2017, 02:17 PM | #6 |
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(I know the question said turbo but....) I'm running fully stock exhaust with the harrop supercharger. 240whp on a hot dyno day. It is a restriction and to be on the safe side my tuner has dialed back some timing at the top of the rev range.
I want to sort it out, but it seems to be insanely expensive to get a decent forced induction header (~1.5k), and I am worried about how loud it will be with the full exhaust done. |
01-05-2017, 06:33 PM | #7 | |
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The catback is still not illegal if it is too loud. Someone just gets a noise violation ticket like having a loud party--parties aren't illegal. It just needs to be modified to have a silencer at the tip. Many catbacks come with a silencer if they are higher than a certain decible. |
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01-05-2017, 06:58 PM | #8 | |
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Getting a ticket is the very definition of something that is illegal. No, parties are not illegal, but the noise that they can create is. Yes you can put a tip on it or as I clearly said the noise depends on the catback you chose. They are not all noisy by any stretch.
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The Following User Says Thank You to Tcoat For This Useful Post: | gtengr (01-05-2017) |
01-05-2017, 07:35 PM | #9 | |
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OP could keep the stock front pipe since it would be the only cat left when turbo and run a aftermarket catback(for more power gains)?
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The Following User Says Thank You to 2JZ-GTE For This Useful Post: | Tcoat (01-05-2017) |
01-05-2017, 10:16 PM | #10 | |
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Again, noise violations are illegal. Catbacks are CARB exempt and legal. Honking your horn in a non-emergency is illegal and can also be a noise violation but horns are not illegal. The silencer componet of street exhausts are part of the system. Without it those exhausts are often advertised as track only. |
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The Following User Says Thank You to Irace86 For This Useful Post: | Tcoat (01-06-2017) |
01-06-2017, 06:23 PM | #11 | |
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Quote:
To pass emission you need 2 cats and ask the tuner to tune to pass emissions |
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