true duals - Page 6

STRanger · #76 01-06-2010, 08:37 AM

Quote:

Originally Posted by Jay FX4

You found that out too, eh?

yessir....

Fastncrazy1 · #77 01-06-2010, 04:24 PM

personally, id cut out the muffler, look into the cat, then take a broom handle and force it into the cat a couple times, stir it around, start the truck, blow out all the crap, repeat, then put the muffler on and call it good.....just me tho

Jay FX4 · #78 01-06-2010, 10:12 PM

Quote:

Originally Posted by Fastncrazy1

personally, id cut out the muffler, look into the cat, then take a broom handle and force it into the cat a couple times, stir it around, start the truck, blow out all the crap, repeat, then put the muffler on and call it good.....just me tho

Considering the fact that it's a waste of time and gains you absolutely nothing, I can see why it's just you "tho".

Fastncrazy1 · #79 01-07-2010, 09:51 AM

Quote:

Originally Posted by Jay FX4

Considering the fact that it's a waste of time and gains you absolutely nothing, I can see why it's just you "tho".

if its slightly plugged, or melted, sure it would help....if you look inside and the honeycomb is there, it is a solid object forcing air around it. it may be streamlined for efficiency, but its still an object none the less. remove that object and you improve flow.

STRanger · #80 01-07-2010, 10:12 AM

Quote:

Originally Posted by Fastncrazy1

personally, id cut out the muffler, look into the cat, then take a broom handle and force it into the cat a couple times, stir it around, start the truck, blow out all the crap, repeat, then put the muffler on and call it good.....just me tho

What professional school of automotive engineering did you graduate??

Fastncrazy1 · #81 01-07-2010, 10:38 AM

Quote:

Originally Posted by STRanger

What professional school of automotive engineering did you graduate??

LOL, good point.....i didnt, however i bet if there were real world numbers, a hollow cat will flow better than a slightly plugged cat.....am i missing something here, or does that not make common sense? i realize that there is countless dollars spent in r&d to find the best solution for the market, especially when everyone wants better mileage, but when you cripple that by putting all the pieces in place to meet EPA standards, you will sacrifice mileage. its a proven fact. only up untill the last 2 years have they been able to make an efficient motor that meets EPA regulations WITHOUT defeating the purpose of it to begin with.... am i wrong? I will gladly admit im wrong if i am, but i dont feel i am, and i welcome an education if you are willing to give it? (no im not trying to be a smart ass, im serious)

surfer03133 · #82 01-07-2010, 10:50 AM

they really havnt tried to develop anything that increases mpg until recently. the EPA regulations argument is junk because the EPA standards are so low compared to Europe. European regulations are much tougher than the EPA regs and those engines are still much more efficient than US engines. there really hasnt been any demand for gas sippers, thats why hummer survived as long as it did.
Also the EPA utilizes a regulation method that forces technology onto car manufacturers, i.e. every new car needs a catalytic converter. since the company knows what technology it has to use, and that has already been developed, why wast r & d on new, more efficient technology? engines would have much better performance and power if instead of mandating technology, the EPA mandated targets, like all trucks need a combined fleet mpg of 30, reach that goal however you like. that breeds new and good technology.

Fastncrazy1 · #83 01-07-2010, 11:04 AM

ok, i see. Not trying to argue, just trying to understand, if my previouse statement was untrue or not....if you have a used cat that may be partially blocked....not saying his was or not, i dont know but if it was partially blocked, and you removed that blockage, wouldnt that improve the flow? Thats all im saying, because im not a college grad and i dont have a higher education to validate my statement does not mean it isnt true.....im just sayin.....you add material to a tube or pipe you take away the space for air to flow....

STRanger · #84 01-07-2010, 11:10 AM

Fastncrazy i know what you mean... but if your state doens't have emission tests then you're better off just removing the cat and running straight pipe... But you still have the sensors to deal with??

Fastncrazy1 · #85 01-07-2010, 11:22 AM

Quote:

Originally Posted by STRanger

Fastncrazy i know what you mean... but if your state doens't have emission tests then you're better off just removing the cat and running straight pipe... But you still have the sensors to deal with??

Are you refering to the O2 senser? thats before the cat isnt it? if there is a senser after the cat....i did not know.. my mistake. i do have emissions, btw and they are a visual so technically you cant remove the cat....so when it got clogged, we just hollowed it out. This was on a different car..not my ranger.We have a visual inspection as well as a sniff test here in washington. if it fails they start looking to see if all your emission equipment is there. keep in mind, my ranger isnt street legal so that has long since been removed...im running a single flowmaster and single 2.5 inch pipe from the collecters back. thats it. as for the muffler, they call it flowmaster for a reason dont they? it flows better than stock in most cases...I am alll about being educated...i dont mind being corrected, after all it eventually makes me a better person.

West · #86 01-07-2010, 11:32 AM

There's an o2 sensor behind the cats when OBD2 was mandated so 95 and older does not have a sensor behind the cat, but 96+ does. There are ways around the check engine light if you do gut the cats. You can either spend I think about $20-30 for a plug-in harness that fools the computer or spend a couple bucks and get some spark plug non-foulers and pull the o2 sensor farther out of the exhaust stream to make the computer think that the cats are still doing their job when they are actually not there. Hope this makes sense.

STRanger · #87 01-07-2010, 11:46 AM

his must be an older model.... If it was an older one with high mileage I'd probably remove it, but for a newer one, i'd replace it...

surfer03133 · #88 01-07-2010, 01:22 PM

Quote:

Originally Posted by Fastncrazy1

ok, i see. Not trying to argue, just trying to understand, if my previouse statement was untrue or not....if you have a used cat that may be partially blocked....not saying his was or not, i dont know but if it was partially blocked, and you removed that blockage, wouldnt that improve the flow? Thats all im saying, because im not a college grad and i dont have a higher education to validate my statement does not mean it isnt true.....im just sayin.....you add material to a tube or pipe you take away the space for air to flow....

lol, im just regurgitating things i learn in my classes back out so i can say that it was helpful. but i agree with you that a partially blocked cat doesnt function as well as a hollow cat.
i guess my statement was completely unrelated lol

Fastncrazy1 · #89 01-07-2010, 01:49 PM

LOL, they are helpfull, we will let them be heard!!!! i cant be informed if i dont listen, i cant change if no one points out the flaws.....

surfer03133 · #90 01-07-2010, 07:07 PM

Quote:

Originally Posted by Fastncrazy1

LOL, they are helpfull, we will let them be heard!!!! i cant be informed if i dont listen, i cant change if no one points out the flaws.....

lol thanks, i try to share some of the stuff i learn about in class since a lot of it is related to regulation and the auto industry, i figure a lot of people here might be interested in reasons behind stuff...theres definitely some really interesting info out there