downpipe size question (searched)

[bobafett]

ok i have a t3/t04e turbo with a 2.25" 4 bolt turbine dicharge flange....

the downpipe i had made ended up coming with a 2.25 5 bolt flange :(

i have access to a 4 bolt 2.5" flange, but im wondering since they arent really close to the same size if it will be a problem..

im thinking it might be ok, but i dont see what other options i have, since after searching a ton of stores i cant find anyone who sells a 2.25" 4 bolt flange. :( just the 2.5"

what is the easiest solution for this problem? im sure there is something simple, but this is my first turbo project, so im a bit overwhelmed...

[orion::S14]

As long as it will bolt up and seal...BIGGER is BETTER.

So use the 2.5" 4-bolt flange...and use 2.5" piping (maybe 10-12" of it), until a point in your DP where there's room to pump it up to 3".

- Brian

[bobafett]

my dp is already set up 2.25 > 3 after less than 6" of smaller pipe.

is there an easy way to weld a 2.25" circle into a 2.5" hole that i am not aware of? or will they just have to use a shitload of welding? just seems like an ugly gap. oh well, maybe they can hog out the pipe to make it fit...

thanks for your reply though, at least i know the idea will work if i can get the flange on there! ;)

[WeldingHank]

your exhaust is only as good as its smallest part. the shorter the amount of 2.5" or whatever piping the better.