5" Exhaust
02-02-2010, 07:15 PM
#17
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Just thinking out loud. So if the outlet of an eg GT35 is 3" yes. So if you go out at 3" and flare larger at some point along the line won't that free up backpressure anyway? So long as there isn't some bottleneck along the way, then won't going bigger be better in general?
02-02-2010, 08:26 PM
#18
There's pressure in the system because unless it is 5 inches from the turbo back there will be pressure. 5" exhaust is pointless.. But hey if someone wants to waste $2000 on this system with LR more power to them.
Anyone that thinks they are maxing out even a 4" exhaust should simply consider a 4" straight dump from the turbo as any gain from the 5" dia will likely be neglected by the additional weight...
Anyone that thinks they are maxing out even a 4" exhaust should simply consider a 4" straight dump from the turbo as any gain from the 5" dia will likely be neglected by the additional weight...
02-02-2010, 08:39 PM
#19
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5" it's just a meter of exhaust the lindsey racing 4" sure could do with a 1" increase in the front half and this is were it will be making a difference .. I can't wait to see it on a car as i just understand how they will get 4" past the rear cross member.
02-02-2010, 09:17 PM
#20
Drifting
It may not do much for the 2.5L guy not making over 350-400 RWHP over a 4". Time will tell.
Those runing larger engines, which now can be 3.1 and 3.2(ish)L versions, with 16v heads
and running higher RPM, there will be much to be gained. All those in between will fall somewhere
in the middle.
There are those people (quite a large percentage) that buy exhaust because of the sound. For those,
this will be the one to have in you don't want to sound like everybody else. And they will gain some performance while at it.
Those runing larger engines, which now can be 3.1 and 3.2(ish)L versions, with 16v heads
and running higher RPM, there will be much to be gained. All those in between will fall somewhere
in the middle.
There are those people (quite a large percentage) that buy exhaust because of the sound. For those,
this will be the one to have in you don't want to sound like everybody else. And they will gain some performance while at it.
If I call you from my cell in my car with a 5" exhaust.....will we be able to talk...lol
Really, for those track guys with HP only in mind, this is another option to consider.
Thanks for building parts for us 951 nuts.
02-03-2010, 02:38 AM
#25
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Just thinking out loud. So if the outlet of an eg GT35 is 3" yes. So if you go out at 3" and flare larger at some point along the line won't that free up backpressure anyway? So long as there isn't some bottleneck along the way, then won't going bigger be better in general?
Theoretically, it's best to vent to atmosphere.
This big *** 5" bong is going to sell more to the folks who are so insecure that they need to brag about a "larger pipe" than those who already have one.
YMMV
02-03-2010, 02:45 AM
#27
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The point at witch the velocity of the exhaust gas counts is at the exhaust port and at the turbine blade .... perhaps a little in between those points but no where else .
seems every one has overlooked that its simply a rear muffler its not a 5" system ..
seems every one has overlooked that its simply a rear muffler its not a 5" system ..
02-03-2010, 03:07 AM
#28
If you use a pipe that is too large you reduce the velocity of the gazes and the flow will be reduced. The size of an exhaust pipes has to be calculated in function of engine displacement and wanted power. This is particularly important when determining header size. Too large exhaust will lose power, particularly midrange.
02-03-2010, 03:41 AM
#29
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This is a 3" V-Band out and immediately into 3.5" then down, into 4" (w removable section for Cat), along into 4" oval, then 5" out. In some sense it is a 5" muffler I guess. My feeling is that if there's no bottleneck from the turbo back then what's the problem? The idea is that this will be mated to a motor capable of over 600hp so again, what's the problem?
The top pic is of it next to a 3" system.
The top pic is of it next to a 3" system.
02-03-2010, 03:45 AM
#30
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Absolutely not the case ...All that science all that harmonics and velicty stuff starts at the exhaust port and ends at the turbo charger.
As I'm on the bones of my **** it will only be $50 but i will give $50 for a real verified accouint of a turbo carged car that has seen a loss in performance due to increased exhaust size post turbo...
As I'm on the bones of my **** it will only be $50 but i will give $50 for a real verified accouint of a turbo carged car that has seen a loss in performance due to increased exhaust size post turbo...