Upsize My Suction Line?

[Mick_o]

Hi guys im upgrading my nistune to a G4 Link so im doing away with the z32 and my GTX3071 has the 4'' housing is it worth changing my 3'' suction line to 4'' chasing 320+rwkw?

[Dale FZ1]

Could be problematic depending on what your filter setup is. 3 inch tube should be heaps

[R31Nismoid]

As long as it's 3" and opens to 4", you'll be fine.

The main thing you want to ensure is the AFM is far away as possible. Plus a Z32 AFM isn't 4" and that's what everyone makes 300+ on (3" going to 4") - so it's not an issue of importance.

[AngryRB]

As long as it's 3" and opens to 4", you'll be fine.

The main thing you want to ensure is the AFM is far away as possible. Plus a Z32 AFM isn't 4" and that's what everyone makes 300+ on (3" going to 4") - so it's not an issue of importance.

so are you saying 4inch until just before the filter? or 4inch pipe for say half a foot then taper down to 3inch? if the compressor housing is 4inch maybe garrett thinks a 4inch pipe is needed, im not sure.

Edited January 11, 2012 by SliverS2

[89CAL]

You can just use a 4" to 3" silicon adapter, some of the HKS kits come with this

The GTX3071 is only a 4" inlet because of the port shrouding, if you look at the compressor wheel, its only about 3" when you dont include the port shrouding. I dont think a 3" intake would ever be much of a restriction with this turbo

[R31Nismoid]

^+1 to the above.

I had a 3" to 4" adaptor made from ally right before the turbo inlet.

Was fine for 280rwkw @ 17psi with a GT3040. Plus as said they are not a 4" wheel.

[Mick_o]

The z32 is going ash got a link g4 and 7bar map sensor if the 3 inch line is fine i wont change it thanks for the input mate

As long as it's 3" and opens to 4", you'll be fine.

The main thing you want to ensure is the AFM is far away as possible. Plus a Z32 AFM isn't 4" and that's what everyone makes 300+ on (3" going to 4") - so it's not an issue of importance.

[AngryRB]

ill take your word for it , maybe its just a wank factor but i thought the 4inch pipe would look more the business rather than dropping down in size ..

but yes sir mr nismoid!! yes sir!! haha,

[Mick_o]

Less work for me sounds good appreciate your responses guys just wanna get my setup right for E85 for the best possible results can anybody tell me if the big can actuator can help bring boost on better?

[89CAL]

4" might look neater but like you say leaving it 3" is cheaper/easier

[KiwiRS4T]

Are you using the Link plus a solenoid for boost control?

[R31Nismoid]

The z32 is going ash got a link g4 and 7bar map sensor if the 3 inch line is fine i wont change it thanks for the input mate

Didn't even read that part lol. More-so just meant that if everyone else does it with AFM size leading pipe then it shouldn't be a problemo

[JonnoHR31]

if it starts becoming a serious restriction boost would taper off pretty badly because of it. i've run 24psi with a 3" intake with a 3-4" reducer on the turbo end with no problems at all

[Mick_o]

Ive got a hks evc6 controlling boost at the moment mate but thinking bout swapping it for a profec b because yavus knows how to set them up the hks is bit of a head f**k to setup whats the link boost control like?

Are you using the Link plus a solenoid for boost control?

[Mick_o]

Guess i will wait and see wat yavus and his dyno tell me but sounds like it will be fine if its too small ill weld up a new line in nice shiny 316 staino

if it starts becoming a serious restriction boost would taper off pretty badly because of it. i've run 24psi with a 3" intake with a 3-4" reducer on the turbo end with no problems at all

[Mick_o]

Was hard enough making the suction line fit in 3" with the z32 let alone 4" plus z32 lol just thought if it would aid my setup id swap it over

Didn't even read that part lol. More-so just meant that if everyone else does it with AFM size leading pipe then it shouldn't be a problemo

[GTScotT]

Good move bro, I hate AFM's.

Try to retro an airbox back in then put a 4" adapter to the box and run a 4" pipe from the turbo fo the box.

FYI you can use an EVO pod filter adaptor for an easy 4" mounting flange. I do something similar with the airbox in my 200, I use an SR20 3" pod adaptor bolted to my airbox where the AFM normally goes and have a 3" pipe from there to the front of my 3" turbo.

[Mick_o]

Cheers for the tip Jase might try getting my hands on a stock airbox and see what i can come up with to make it look legit [ quote name=GTScotT' timestamp='1326340234' post='6185211]

Good move bro, I hate AFM's.

Try to retro an airbox back in then put a 4" adapter to the box and run a 4" pipe from the turbo fo the box.

FYI you can use an EVO pod filter adaptor for an easy 4" mounting flange. I do something similar with the airbox in my 200, I use an SR20 3" pod adaptor bolted to my airbox where the AFM normally goes and have a 3" pipe from there to the front of my 3" turbo.

[Mick_o]

Im putting your predictions to the test mate im gunna get yavus to push it as much as my fuel system can cope but safely of course haha

[TiTAN]

whats the link boost control like?

basic open loop or full closed loop control, will require dyno time to setup all the fiddly settings to get closed loop working 100% but once set it takes care of boost drops/spikes itself.