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3.5 inch y pipe?
#1
Registered Member
Thread Starter
3.5 inch y pipe?
So I was looking through CBEs today and noticed all the configurations had a 2.5 inch joining to a 3 inch y pipe. Doing some simple math, 2(pi/4)(2.5)^2) gives us the cross-sectional equivalent of the 2.5 inch part. This equates to about 9.8 inch^2 while the 3 inch comes to about 7.1. Wouldn't it make more sense to go with a 2.5 going into 3.5? 3.5 inch pipe would have a 9.6 inch^2 area which is closer to the two 2.5 inch area of 9.8. Am I missing something here? Also I'm completely new to the modding scene so if I sound like a complete idiot, or if the 2.5-3.5 inch exists feel free to call me an idiot and correct me. If you guys have some recommendations please let me know as well. I have a 2013 g37x so I might not be able to use some pipes.
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Sgt.toast (04-05-2021)
#3
Moderador
So I was looking through CBEs today and noticed all the configurations had a 2.5 inch joining to a 3 inch y pipe. Doing some simple math, 2(pi/4)(2.5)^2) gives us the cross-sectional equivalent of the 2.5 inch part. This equates to about 9.8 inch^2 while the 3 inch comes to about 7.1. Wouldn't it make more sense to go with a 2.5 going into 3.5? 3.5 inch pipe would have a 9.6 inch^2 area which is closer to the two 2.5 inch area of 9.8. Am I missing something here? Also I'm completely new to the modding scene so if I sound like a complete idiot, or if the 2.5-3.5 inch exists feel free to call me an idiot and correct me. If you guys have some recommendations please let me know as well. I have a 2013 g37x so I might not be able to use some pipes.
Better flow, better sound, less weight, etc
All of these play a huge part in everything.
Over time you'll realize for better power you'll be better off going to a single exhaust. 3 in seems to work however so will 3.5. The reason why you dont see much of this is availability and pricing, sound plays a huge part. After 3 inches expect to pay a pretty penny for resonating devices.
Back in my Honda days we discovered 4 inch tapered intakes into a 3 inch throttle yielded best results along with a a 4-1 collector to a single 3 inch pipe with or without megaphone would surpass anything in the top end.
The 37 will benefit from this type of thinking more than a 35 for sure. At the moment there's just not much info since folks get swept in the exhaust bolt on game and deciding between duals and singles, etc.
The following users liked this post:
Sgt.toast (04-05-2021)
#4
Registered Member
Thread Starter
My question is goal? What are you trying to achieve?
Better flow, better sound, less weight, etc
All of these play a huge part in everything.
Over time you'll realize for better power you'll be better off going to a single exhaust. 3 in seems to work however so will 3.5. The reason why you dont see much of this is availability and pricing, sound plays a huge part. After 3 inches expect to pay a pretty penny for resonating devices.
Back in my Honda days we discovered 4 inch tapered intakes into a 3 inch throttle yielded best results along with a a 4-1 collector to a single 3 inch pipe with or without megaphone would surpass anything in the top end.
The 37 will benefit from this type of thinking more than a 35 for sure. At the moment there's just not much info since folks get swept in the exhaust bolt on game and deciding between duals and singles, etc.
Better flow, better sound, less weight, etc
All of these play a huge part in everything.
Over time you'll realize for better power you'll be better off going to a single exhaust. 3 in seems to work however so will 3.5. The reason why you dont see much of this is availability and pricing, sound plays a huge part. After 3 inches expect to pay a pretty penny for resonating devices.
Back in my Honda days we discovered 4 inch tapered intakes into a 3 inch throttle yielded best results along with a a 4-1 collector to a single 3 inch pipe with or without megaphone would surpass anything in the top end.
The 37 will benefit from this type of thinking more than a 35 for sure. At the moment there's just not much info since folks get swept in the exhaust bolt on game and deciding between duals and singles, etc.
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