3" downpipe to 2" exhaust stupid idea?

[GazzaG60]

i understand your view. its correct but as an interim i feel 2 " would do.
as for lasting. i know of cars that have had 320+ for 4 years and still fine. the main subaru issue is that the engines are no good anyway. they dont use shells on the crank even. its bare block to crank. they aint designed to last.

the question of how long is a road car at full throttle for is relevent here too.

do we know the size of the ex housing on a k03. thats a factor for sure.

i dont disagree with you bigger is better iin FI exhaust but it will work for now. it wont make as much power though. i think the k03 is the limit here. scratch that it cant be k03 at 300hp +

[Jamo]

i understand your view. its correct but as an interim i feel 2 " would do.
as for lasting. i know of cars that have had 320+ for 4 years and still fine. the main subaru issue is that the engines are no good anyway. they dont use shells on the crank even. its bare block to crank. they aint designed to last.

the question of how long is a road car at full throttle for is relevent here too.

do we know the size of the ex housing on a k03. thats a factor for sure.

i dont disagree with you bigger is better iin FI exhaust but it will work for now. it wont make as much power though. i think the k03 is the limit here. scratch that it cant be k03 at 300hp +

K04's struggle at that power as well, most 1.8T converted cars run 2.5" exhausts but it's not just the bore size it's the overall length of the system.

You could easily as Gazza says use this system with a 3" downpipe and 2" exhaust however I would unplug the N75 and run wastegate boost only.

You couldn't go anywhere near the 300 bhp the engine produces without issues.

The 1.8t drops valves on a high egt pushed engine

[sam80quattro]

I'm running a t28 off a 200sx bigger injectors ground mount etc, to be honest the downpipe is probably about 3 1/4, I reckon it'll more like 270/280 for now but rather be safe than sorry. If I can't find a cheap 2.5" exhaust I might even go 3" aluminium as I've got enough lying about and seen a few on motorgeek and it be nice to try, thanks for all the replies

[sam80quattro]

Ment to say front mount not ground, bloody iPhones lol