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11-17-2015, 06:57 PM
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#19 |
 Drives: 2009 Yaris Join Date: Jan 2014
Location: Rigaud, Quebec, Can.
Posts: 357
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No it wasn't hearsay but based on experience from several people here. Your exhaust is measured from CFM going in and out and you need some back pressure. By going too big you lose back pressure. I did mine based on maximum cfm, max hp I could ever get out of this 1.5L N/A. Before I did mine every custom shop wanted to convince me to do 2.5"............it's more common and in stock. Been doing this for 33 years, I did my share of mistakes when I was a kid but didn't have internet or anything much like in today's world.
2-1/4" pipes 408 cfm 185hp single 2-1/2" pipes 509 cfm 232hp single Your engine put's out 106 HP at the motor and about 89whp. Even Jason who races these cars gave you good info. ;) This will be my last post for info. Cheers
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 2009 Toyota Yaris (Little toy) 2002 Audi A4 Avant Quattro 3.0L (Big boy toy) 1998 Subaru Legacy GT 2.5 (winter & DD) |
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