View Poll Results: 2.25 or 2.5
2.25.
3
25.00%
2.5.
9
75.00%
Voters: 12. You may not vote on this poll
2.25 or 2.5 exhaust on my FC?
#1
QC Motorsports
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2.25 or 2.5 exhaust on my FC?
This is my street car so I need driveability. Which is a better choice. I want the best performance but I don't want to lose low end either. My car is an S5 so the the 6 ports accuation isn't a problem.
Charles
Charles
#2
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#3
WTB S5 N/A FC
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FOr low end power, you want backpressure. SO 2.25. For *** kickin on the highway, you want as little backpressure as possible, so 2.5. I like highway racing, so I went 2.5 to a 3inch muffler. It all depends on what you want to do w/ your car.
When I get my TII, I'm commin over to Austin to cruise around wit ya man!!!
When I get my TII, I'm commin over to Austin to cruise around wit ya man!!!
#5
Rotorhead
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Header with 27" primaries collected into a 2.25" pipe, then gradually increase the diameter of the pipe each time you add components (cat, pre-silencers, mufflers, whatever).
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#9
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I just sold 2 N1's to a customer with an NA and enough 2.5" piping. I suggested 2.25" but he wanted 2.5". He also purchased a good quality Y pipe. Assuming the welding/fabbing is done well, how do you guys think this will affect its HP over(hopefully!) stock? The only other mod is an intake. One thing I know is it will sond and look great!
#15
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Originally posted by peacekeeper
So Evil,
You would go 2.25 from colector to cat, 2.5 from cat to Y and 3 to mufflers? Would that be a good set up?
Charles
So Evil,
You would go 2.25 from colector to cat, 2.5 from cat to Y and 3 to mufflers? Would that be a good set up?
Charles
Using Pi R^2 you can calculate the diameters. With the stats below, you can see that dual 2.25" pipes are nearly 1 sq in larger than a single 3" pipe.
2.00" = 3.14 sq in
2.25" = 3.97 sq in
2.50" = 4.91 sq in
3.00" = 7.07 sq in
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