Y-pipe use with stock piping
02-17-2005, 12:30 PM
#1
Y-pipe use with stock piping
i have a question about backpressure when adding a Y-pipe while keeping everything else stock...
will i have abnormal backpressure which might affect exhaust flow out of the engine.......and also do aftermarket Y-pipes use larger diameter piping than the stock Y?
will i have abnormal backpressure which might affect exhaust flow out of the engine.......and also do aftermarket Y-pipes use larger diameter piping than the stock Y?
02-17-2005, 12:33 PM
#3
yea, dont worry about ur back pressure. Just keep your cat on, unlike me...who was to take it off and fry everything due to no back pressure BUT ANYWAYS!! yeah, the Y-pipe would be a great investment for u right now.
02-17-2005, 12:37 PM
#5
so there is no difference in the diameters between the stock and aftermarket y-pipes?
i didn't know the inlet for the cat was 2.5", if that's so then basically Y-pipe diameter doesn't change when going aftermarket.....just the pre-cats are removed
or am i still missing something
i didn't know the inlet for the cat was 2.5", if that's so then basically Y-pipe diameter doesn't change when going aftermarket.....just the pre-cats are removed
or am i still missing something
02-17-2005, 12:39 PM
#6
Originally Posted by A Flood99
so there is no difference in the diameters between the stock and aftermarket y-pipes?
i didn't know the inlet for the cat was 2.5", if that's so then basically Y-pipe diameter doesn't change when going aftermarket.....just the pre-cats are removed
or am i still missing something
i didn't know the inlet for the cat was 2.5", if that's so then basically Y-pipe diameter doesn't change when going aftermarket.....just the pre-cats are removed
or am i still missing something
02-17-2005, 12:45 PM
#11
Originally Posted by Jeff92se
Go ahead and get that for me 
To normal people, it's just called "pressure."
It's just terminology.
02-17-2005, 12:45 PM
#12
well i just used back pressue because i've heard that term somewhere......i'm just worried i may improperly alter my exhaust flow due to having stock header diameter, increased Y-pipe diameter, and stock catback diameter(mainly concerned about restrictive B-pipe)
but maybe getting exhaust out of my engine is not as complex as i make it out to be
but maybe getting exhaust out of my engine is not as complex as i make it out to be
02-17-2005, 12:47 PM
#14
also mzmtg, i read on another forum that you have a leaking front caliper........if you have ABS i can help you out since i've got two good looking calipers i took off my max, just tell me left or right and its yours, just pay shipping
02-17-2005, 12:48 PM
#15
You might have a case for "resistance to flow pressure" but there is no "back pressure". Only exhaust gas velocities. Becuase I didn't see any flowing backwards from the tail pipe to create any "backpressure". hehe
Originally Posted by mzmtg
If you insert a static pressure probe at the upstream end of the exhaust system, you can measure the pressure. In automotive parlance, this is called "backpressure."
To normal people, it's just called "pressure."
It's just terminology.
To normal people, it's just called "pressure."
It's just terminology.
02-17-2005, 12:48 PM
#17
Originally Posted by Jeff92se
You might have a case for "resistance to flow pressure" but there is no "back pressure". Only exhaust gas velocities. Becuase I didn't see any flowing backwards from the tail pipe to create any "backpressure". hehe
It's still the pressure that the engine must overcome to move the gas through the pipe. Call it whatever you want.
02-17-2005, 12:56 PM
#23
Let's all read the basics about pumps and piping systems...
http://www.roymech.co.uk/Related/Pumps.html
http://www.roymech.co.uk/Related/Pumps.html
02-17-2005, 01:07 PM
#28
But you just said "the less backpressure, the better". Nothing about velocities at all. By just saying that, the person should install a 3.5" exhaust system to lower the "backpressure" as much as possible.
Originally Posted by mzmtg
In a properly designed system, one can minimize pressure while maximizing velocity.
02-17-2005, 01:10 PM
#29
Originally Posted by Jeff92se
But you just said "the less backpressure, the better". Nothing about velocities at all. By just saying that, the person should install a 3.5" exhaust system to lower the "backpressure" as much as possible.
Becuase I didn't see any flowing backwards from the tail pipe to create any "backpressure". hehe
So there.
02-17-2005, 01:12 PM
#30
How much pressure is exerted directly backwards in the flow of the exhaust pipe? More than the 1 bar that is already exerted at the other end? 
Originally Posted by mzmtg
Oh yeah? Well you said:
Pressure acts in all directions, regardless of flow direction.
So there.
Pressure acts in all directions, regardless of flow direction.
So there.
02-17-2005, 01:14 PM
#31
Originally Posted by Jeff92se
How much pressure is exerted directly backwards in the flow of the exhaust pipe? More than the 1 bar that is already exerted at the other end?
02-17-2005, 01:16 PM
#32
Didn't you just say the less pressure the better? 
Originally Posted by mzmtg
Yes. The pressure inside the pipe must be higher than atmospheric, or the exhaust wouldnt flow out of it. Fluids always flow from areas of high pressure to low pressure.
Thread
Thread Starter
Forum
Replies
Last Post
litch
4th Generation Maxima (1995-1999)
123
01-04-2024 07:01 PM
My Coffee
New Member Introductions
15
06-06-2017 02:01 PM