Are long tubes worth the money?

[K4fxd]

How do you run no cats and not throw codes?

Some people use and have good results with o2 extensions, others live with the light.

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[RNM]

How do you run no cats and not throw codes? I want to run catless headers, no emissions in my state.

Fuck the EPA with Big Daddies Garage.

 

[stannypack]

Fuck the EPA with Big Daddies Garage.

Yep, also running big daddies mini cat extensions

 

[icecreamtruckz]

Fuck the EPA with Big Daddies Garage.

I see. Funny I never heard of these guys before and I have been voiding warranties my whole life. Thanks for the heads up.

 

[NGOT8R]

I never got a CEL when I went catless and don’t have any o2 extension pieces.

 

[ENDEVR]

I went long tubes, with Steeda axleback and resonated x pipe. Car is still loud as hell but sounds absolutely fantastic and adds to my enjoyment factor(I’m also not a fan of raspy exhausts either.) On E85 with the long tubes the car rips too. I went the cheaper route and installed myself. PITA but to me it was worth it to save the $500.

 

[jpjr501]

Long Tubes and cats are the area where you'll get the most gain. After the cat area the rest is just noise. My car made close to 800hp on Stainless Works Long Tube Headers, no cats, stock resonator and stock cat back.

 

[icecreamtruckz]

Long Tubes and cats are the area where you'll get the most gain. After the cat area the rest is just noise. My car made close to 800hp on Stainless Works Long Tube Headers, no cats, stock resonator and stock cat back.

I am dying to go no cats. Aside from the smell and possible CEL is there any other downsides?

 

[jpjr501]

I am dying to go no cats. Aside from the smell and possible CEL is there any other downsides?

I'm on E85 so with no cats it smells nice. In fact I've trained my nose on the smells. I can tell my E85 is old. E85 collects moisture and in Florida with lots of moisture in the air, lots of water comes out my tailpipes. Not good for cats. Check my video below of water coming from my mufflers.

The Check Engine light for no cats is removed in the tune.

Downsides, yes. Installing them is god awful. Clearing that steering shaft is such a pain.

Upside, yes. The power gain is quite high. I think I got 41 out of long tubes and no cats if I remember.

 

[stannypack]

I am dying to go no cats. Aside from the smell and possible CEL is there any other downsides?

The smell isn't that strong, personally I like it. I thought it'd be crazy after seeing some people say it'd make their clothes stink lol

 

[robvas]

I am dying to go no cats. Aside from the smell and possible CEL is there any other downsides?

louder and crappier sounding

 

[Forestlump]

I'm on E85 so with no cats it smells nice. In fact I've trained my nose on the smells. I can tell my E85 is old. E85 collects moisture and in Florida with lots of moisture in the air, lots of water comes out my tailpipes. Not good for cats. Check my video below of water coming from my mufflers.

The Check Engine light for no cats is removed in the tune.

Downsides, yes. Installing them is god awful. Clearing that steering shaft is such a pain.

Upside, yes. The power gain is quite high. I think I got 41 out of long tubes and no cats if I remember.

The waters just the usual result of combustion that's condensating once it cools below the dew point of 56 degrees C. It's hotter than that at the cat's so isn't liquid then.

What's made this happen is your exhaust has more surface being larger diameter and having long tubes, there's way more surface to cool the gas.
The gas is traveling slower inside the larger capacity exhaust system and so has longer being exposed to all this additional area. The gas loses energy and cools to the dew point before leaving the pipes.

The cats aren't there anymore either so aren't assisting with generating additional heat like they would be if they were in still.

The result is lots of condensation
and added pumping losses because hot gas is easier moved than cold gas. But only at lower flow rates as there will be a point where outright flow will overcome the increased energy losses. You've probly lessened your milage slightly by making it less efficient.

What's interesting is once you hit that dew point, the gas rapidly loses energy at a quicker rate. You've made a condensing boiler .

That condensate is acidic by the way.

 

[barron64]

Looks like a set quality headers, installation labor and then a tune, gets you 1/3 of the way to a supercharger? Rough math looks like around $100/HP for headers, 35hp gain, and $40/HP for a supercharger with a 250hp gain. Just doing some daydreaming on this, lol.

 

[Forestlump]

all this "gas slowing down" sounds like bullshit

stick your hand in there and see how cool the exhaust gas is...

cold pipes + hot air = water

edit: plus ethanol...read my next post

I wish I was you, life would be so much simpler

 

[Forestlump]

According to science a major byproduct of burning ethanol, which you don't get with gasoline (non-ethanol gasoline at least), is a lot of H2O

Doesn't have anything to do with e85 collecting moisture (your car probably wouldn't run if you collected enough to matter) the moisture in the air in florida

https://carbontime.create4stem.msu....5_What_Happens_When_Ethanol_Burns_Reading.pdf

complete combustion makes co2 and H2O no matter the fuel, natural gas, petrol or alcohol.

You're right about the water not being in the e85 because ethanol binds with water. The 15% gasoline in e85 is oil based and doesnt mix with water.

What happens with e85 when moisture goes in it, is it sticks to the ethanol and becomes heavier than the gasoline and sinks to the bottom of the tank and forms sludge.

In effect its reducing the alcohol content of the fuel so with more water going in to it the ratio of methanol to gasoline reduces e80, the e75 and so on.

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