2.25 or 2.5

[FLAMEBOY]

i hav 2.25 piping atm... all i want to know is which one is better for 2.3lt? 2.25 or 2.5? i'm thinking to go NA mods later on...

 

[AzMz3]

i hav 2.25 piping atm... all i want to know is which one is better for 2.3lt? 2.25 or 2.5? i'm thinking to go NA mods later on...

2.5"

 

[FLAMEBOY]

2.5"

does 2.5 give more whp? no back pressure loss?

 

[thebeansoldier]

http://www.mazda3forums.com/index.php?topic=30097.msg425635#msg425635

dyno, review, weight, before + after video....

torque increase is very nice

 

[BC3I]

is that on an "i" model?

 

[thebeansoldier]

no, the rx8 wheels are just that heavy. once i get the race pipe finally installed, i'm gonna go back and dyno both stock 16s and rx8 wheels to see how much i should be getting.

edit: if the results are still relatively low for the 16 stockers, then maybe the shop's dyno just gives that low of a number. mine are SAE corrected at 4500ft.