Does a car actually lose power when there are holes in the manifold/exhaust

>>14568317
Nice hoerscock

>>14568317
>backpressure
>important
Only if you turbo.

>>14568333
Ah, didn't know that. Thanks.

>>14568317
Exhausts actually pull the fumes from the engine. This is called scavenging, holes in the exhaust will affect this and will cause emissions problems, especially if the leak is before a lambda sensor.

>>14568350
i've seen bmw autotragics bog down and not want to shift b/c of this, especially holes before the cat.

It may also kill the idle control motor, but that's conjecture.

>>14568333
Except it's the exact opposite.

File: 1454895811395.jpg (56KB, 480x480px) Image search: [Google]

56KB, 480x480px

>>14568555
this faggot actually thinks you can run a boosted engine without backpressure.

>>14568565
Not him but
>what are superchargers

>>14568584
Enjoy destroying your engine without the exhaust.

PEEEEEEENISSSSSSSS

8======D

>>14568555
wat

File: 1449981818694.jpg (39KB, 500x380px) Image search: [Google]

39KB, 500x380px

>>14568598

The purpose of an exhaust is to expel exhaust gasses safely, clean exhaust gasses, and reduce noise. Think about that.

ha ha benis :----DD

>>14569836
>and reduce noise

I'm still baffled how incredibly silent modern cars became.

Especially business class 4cylinder ones.
and I'm not even talking about hybrids.

>>14568555

this

turbos don't need back pressure.

>>14568443
>autotragics

But what does it have to do with the transmission?

>>14568598
>>14569817
>>14569855

>Quality of posts

Mods.

>>14568565
>>14568555
>>14568333
Technically you're both not wrong, you just want backpressure before the turbo and no backpressure after.

>>14569894
Shitposting aside, the fact that performance cars need to use all sorts of sound piping/fake audio trickery should tell you how much quieter cars are now

3
2
1
Horse schlong

>>14569916
>>14569894
>think of the safety of the chilluns!
>lets make cars impossible to hear coming
I miss audible exhaust notes even on boring cars, it didn't have to be exciting, it just let you know the damn thing was on and running right.

>>14568592
Exhaust is literally the waste formed from the combustion process. How exactly would increasing the potential flow of exhaust harm an engine? There's no reason a higher flowing or complete lack of exhaust system aft the upstream oxygen sensors should reduce the performance or reliability of any engine.

>>14569990
>Trip
>doesn't understand that the exhaust system is what generates back pressure
Go figure.

>muh backpressure
summon ND

>>14569990
Termi being retarded as usual.

>>14569975
>tfw sometimes I forget my car is running if it's particularly loud outside (like the wind is blowing mildly or someone has a stereo playing at the campground) and have to get back in to remember if I turned my car off or not

>>14569990
You can burn up the valves in an engine

>>14570002
>Termi
>Tripfag
>smart
Fucking newfag

i've been asking myself the same question for awhile, and since this thread once again failed to provide an accurate answer i googled it.
here you go you useless faggots
http://gomog.com/allmorgan/exhaustbackpressure.html

File: 1289410338937.jpg (80KB, 600x522px) Image search: [Google]

80KB, 600x522px

>>14570002
>anon
>Doesn't realize that "backpressure" is in no way beneficial to a running engine.
Go figure.

Why would switching to aftermarket exhaust system improve horsepower?

>>14571746
Because it doesn't

>>14571746
The stock one can be less than ideal for your purposes. Most stock exhaust manifolds a shit, headers are good. X pipes or h pipes are nice for dual-bank engines, and so on.

File: 1911.jpg (758KB, 1024x768px) Image search: [Google]

758KB, 1024x768px

>>14571746
This is especially true with older cars / motorbikes:

If the exhaust is not large enough or is designed with bottlenecks, then exhaust gasses can remain in the engine's cylinders, making future combustion less efficient, getting you less power.

>>14571746
They're mostly only for sound and the looks

>>14572437
Muh forza knowledge

File: 2016-03-03_131446.jpg (23KB, 331x186px) Image search: [Google]

23KB, 331x186px

>>14572455
muh snakeoil

>>14572470
Billions of Dinos prove you wrong m8.e

don't know about 4-strokes but a lot of 2-stroke motors need the backpressure just before compression starts to enable scavenging

File: Screenshot_2015-03-27-03-44-41-1.png (1MB, 994x1414px) Image search: [Google]

1MB, 994x1414px

>>14571793
I had a 1990 Integra ls with street headers, cold air intake, and straight pipe welded to replace my rusted out resonator pipe. Later, I purchased a Greddy cat back system, and immediately changed back because way more torque was available in the former set up.
I'm a believer in backpressure.

>>14570574
Itt: People can't into using google

>>14570169
This is an old wives tale. Valves burn from improper sealing.