How Big Is Your Intake For 4 Inch Turbo

[Robo's]

My turbo is 4 inches on its intake, how big should i make the intake pipes??? If i use a Z32 which is 80mm, so say 3 inches and then size it up?? Maybe having a 4 intake pipes all the way is an overkill?

[R31Nismoid]

I had the Z32, so 80mm... then just before the turbo, i had it taper out to 4" so it sat against the inlet for the turbo evenly.

Worked perfectly for me without an issue

[al_r33]

I have a 4inch pipe with a 4-3inch reducer for the z32

[Craved]

I have a 4inch pipe with a 4-3inch reducer for the z32

same

[T04GTR]

mines 4 inch. although it looks abit funny having a ugly reducer on the end if you have a afm

[R31Nismoid]

So have the thing flare from 3" --> 4" near the turbo inlet like me

[2BNVS]

yep i had the same as above before removing the afm

ben...

[2rismo]

Mine now goes from 4" to 90mm about half way between the turbo inlet and the Q45

[Robo's]

Mine now goes from 4" to 90mm about half way between the turbo inlet and the Q45

Any Pictures?

[Craved]

mines 4 inch. although it looks abit funny having a ugly reducer on the end if you have a afm

So have the thing flare from 3" --> 4" near the turbo inlet like me

true, but if you have an air box setup you wouldnt really need to SEE the reducer.

my airbox has the AFM and filter inside it, and the hole is at the 4" section, so you cant see that its reduced at all.

[Slide]

Any Pictures?

[Kaido_RR]

So have the thing flare from 3" --> 4" near the turbo inlet like me

mines like that too go the hks kit!

[saliya]

My turbo is 4 inches on its intake, how big should i make the intake pipes??? If i use a Z32 which is 80mm, so say 3 inches and then size it up?? Maybe having a 4 intake pipes all the way is an overkill?

Hey,

if you can, you want to expand it gradually (more gradually than other pictures show). If you have

the space, try for the 1" expansion over 20cm or so - in general, the shallower the expansion angle,

the better.

This becomes harder if you have to curve it at the same time

Regards,

Saliya