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ELECTRONIC EXHAUST CUTOUT QTP 2.25 inch

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pmeraz23

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Discussion starter · #1 ·
Hi all.

I've thinking of install an Electronic Exhaust cutout (Quicktime Performance 2.25").

But I have a few issues with it:

1.- Anyone knows if the sound of the engine will be stronger with the Cutout? is there any difference with it or without it?
2.- Do you recommend or not? why?
3.- The ones who installed it, where do you recommend to do this? Near the engine or far of it? I ask this because I went down the Patriot to see the exhaust and I note that there is 2.25" near the engine and 2" near the silencer.

tnks for you help.
 
#3 ·
A properly placed Electronic cut out would be right after the catalytic converter and before the resonator, the resonator restricts lots of noise not so much the muffler
 
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#5 ·
having an open exhaust u don't want back pressure

You will get lots of torque
 
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#6 · (Edited)
PPiekarski said:
having an open exhaust u don't want back pressure

You will get lots of torque
Click to expand...
You do need velocity in your flow to get the best of your HP. If you do not have the distance to gain the velocity in flow then you will loose HP. Call it back pressure or else...

So why is exhaust velocity so important?
The faster an exhaust pulse moves, the better it can scavenge out all of the spent gasses during valve overlap. The general idea is a fast moving pulse creates a low pressure area behind it. This low pressure area acts as a vacuum and draws along the air behind it. A similar example would be a vehicle traveling at a high rate of speed on a dusty road. There is a low pressure area immediately behind the moving vehicle - dust particles get sucked into this low pressure area causing it to collect on the back of the vehicle. This effect is most noticeable on vans and hatchbacks which tend to create large trailing low pressure areas - giving rise to the numerous "wash me please" messages written in the thickly collected dust on the rear door.

I got an SRT and QTP cutouts and mine are located right before my resonators not after cats.


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#7 ·
There is no point in putting exhaust cut out on your jeep patriot. There's no gain to be had only money lost. Leave that kind of stuff for street cars or drag cars.
 
#9 ·
cagannyc said:
The Gibson performance high flow exhaust I installed for my Patriot is great. Gain in HP and milage is expected. Sound is great and bold.


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Post up the Dyno graph of your whooping maybe 8 hp gain with you $400 + exhaust. The patriot will never be a hp powerhouse. Lots of people think throwing on a cai or a high flow exhaust is going make these jeep some kind of street warrior. The gains vs the money spent in the patriot are a waste.
 
#10 ·
8hp? I'd be surprised if he got 5hp.
 
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#12 ·
Not everybody does mods for performance, there are passions for sound and aesthetics. I suppose though we should only leave those kind of mods for sweet muscle cars like a Camaro. ;)

That said, no back pressure on a Patriot will only lose hp. Get a nice catback setup or have any muffler shop fab something up with a free flowing muffler if a louder sound is your goal.
 
#14 ·
Even if it is 2hp i do not really care. Looks great, sounds great and feels great. Car swoops up to 80mph on highway without any effort and stays there when i pull my foot off the gas. Not like OEM setup it slows down instantly. Now i have better flow. With new tires i got better comfort, grip and no road noise. It def does not sound like a 4 banger at all.




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#15 ·
84 z28 said:
Post up the Dyno graph of your whooping maybe 8 hp gain with you $400 + exhaust. The patriot will never be a hp powerhouse. Lots of people think throwing on a cai or a high flow exhaust is going make these jeep some kind of street warrior. The gains vs the money spent in the patriot are a waste.
Click to expand...
I think the point is to get the best performance out of your ride. Not trying to make a street warrior out of a 4 cylinder as you say. Small improvements like this satisfies any owner in many ways. Look at it from a broader angle I say.


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#16 ·
84 z28 said:
Would probably be your best bet. Instead of making your 4 banger sound like a Honda.
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I like the sound of 4 cylinder engines with free flowing exhaust so that's not much of an insult.

cagannyc said:
I think the point is to get the best performance out of your ride. Not trying to make a street warrior out of a 4 cylinder as you say. Small improvements like this satisfies any owner in many ways. Look at it from a broader angle I say.
Click to expand...
And there you have it. :)
 
#17 ·
BondiBlue said:
I like the sound of 4 cylinder engines with free flowing exhaust so that's not much of an insult.



And there you have it. :)
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I'm not worried about insulting you, its an opinion of what I think it sounds like. And there we have nothing cause its just his opinion that you happen to agree with. I still go by cutouts and a " performance exhaust " are a waste of money on a 4 cyl. You wanna throw a muffler on your Jeep to try and make it sound better have at it.
 
#18 ·
cagannyc said:
Even if it is 2hp i do not really care. Looks great, sounds great and feels great. Car swoops up to 80mph on highway without any effort and stays there when i pull my foot off the gas. Not like OEM setup it slows down instantly. Now i have better flow. With new tires i got better comfort, grip and no road noise. It def does not sound like a 4 banger at all.




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Click to expand...
And i'm assuming you only have a cat back exhaust on your Jeep. You might like the sound from it but that seat of your pants feel of being faster is all in your head. You gained almost nothing from a cat back partially because the engine is still chocked up from the stock exhaust manifolds back to the cat.
 
#19 ·
84 z28 said:
I'm not worried about insulting you, its an opinion of what I think it sounds like. And there we have nothing cause its just his opinion that you happen to agree with. I still go by cutouts and a " performance exhaust " are a waste of money on a 4 cyl. You wanna throw a muffler on your Jeep to try and make it sound better have at it.
Click to expand...
You keep talking about $ but do you realize Cutouts are also expensive? Also trying to install a part to a cheap oem rig that does not do any good to your car is the correct approach?

Not trying to battle here prob my last post but I am just trying to make sense to your suggestions and way of thinking as oppose to doing mods.

I own a 426 low compression SRT jeep and it is highly modded. Yet still have raced with jacked up honda civics that can run 9sec on a 1/4 mile... So thats a waste of money too on their end?


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#20 ·
cagannyc said:
You keep talking about $ but do you realize Cutouts are also expensive? Also trying to install a part to a cheap oem rig that does not do any good to your car is the correct approach?

Not trying to battle here prob my last post but I am just trying to make sense to your suggestions and way of thinking as oppose to doing mods.

I own a 426 low compression SRT jeep and it is highly modded. Yet still have raced with jacked up honda civics that can run 9sec on a 1/4 mile... So thats a waste of money too on their end?


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I do realize there expensive thats why I said there not worth it on a Jeep in my first post. I explained my opinion anyone can do whatever they want to the car or truck. And I look at it from this stand point. You own a nice SRT8 Jeep. Somebody in a honda civic had to spend twice the money to go just as fast as you in your highly moded SRT8. Who got there with probably the least amount of money and time into there car ? Most likely you. Is it a waste in my eyes for the guy in the honda civic yes. But its the car he likes and he blew all his money on so more power to him.
 
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