Air Inlet Pipes For Gt3076r On Std Manifold Rb25's ?

[discopotato03]

Hi all , the elusive GT3037/GT3076R 52T is in the bag and I'm going to need to start gathering fitting bits .

The thing I haven't seen mentioned is the air inlet pipe that runs between the compressor housings snout and the std or Z32 AFM . Does anyone make them preferably in aluminium and with the extra fittings for the recirc plumbing etc ?

Also do people usually buy longer studs to bolt them up on the std exhaust manifold ?

I tried searching first and started into Lithium's and Mafias threads but don't have time to read right through them .

Also Cubes you have mentioned a bell mouthed dump pipe design for the Garrett GT30 IW turbine housings outlet . I;m curious to know if it differs from the "shell back" types some use up in QLD .

The pics are of my turbo and a HKS Pro S kits air inlet pipe .

Thanks all , cheers Adrian .

[R31Nismoid]

Are you running a POD?

I'll assume you are, and then you are running a CAI setup... to which its probably best to go custom.

Something that puts the AFM as far as possible from the turbo inlet

[discopotato03]

No I'm currently running the R33 S2 std air filter box and AFM , it probably won't keep up with the GT30R even with a better element - Piper Cross in my case .

I'm not real keen on pod air filters , cheers A .

[R31Nismoid]

Then you'll find custom - most dont allow for a stock airbox (which you might find is ok)

GTR airboxes regularly run well into the 300rwkw range, almost 400 in a few cases i know of...

Perhaps stick a GTR one in (if there is some way to adapt?)

[JonnoHR31]

i made up my own intake pipe with a bit of 100mm pipe with a 45 bend in it. used a 100-80mm silicone reducer/joiner to clamp the afm onto it and bought a couple random fittings from enzed for the Bov plumback and pcv. cheap and works perfectly

[Haines]

Yeah you will need the longer studs and a spacer to get clearance from the exhaust manifold

[gotRICE?]

Lithiums is a 4" stainless pipe custom made AFAIK, but he is not using AFM.

And i also believe he has a spacer between the manifold and turbo, so yeah id say longer studs would be a go. Best bet would be to PM him. He loves to talk Turbo

[Dale FZ1]

Cubes you have mentioned a bell mouthed dump pipe design for the Garrett GT30 IW turbine housings outlet . I;m curious to know if it differs from the "shell back" types some use up in QLD .

The Garrett style housing does not necessitate a shellback style dump, whereas the HKS one does. Doing either a divorced pipe off the turbine, or a bellmouth for that Garrett housing would be relatively simple. I've only seen one other example of that HKS style, and it came from HKS.

i made up my own intake pipe with a bit of 100mm pipe with a 45 bend in it. used a 100-80mm silicone reducer/joiner to clamp the afm onto it and bought a couple random fittings from enzed for the Bov plumback and pcv. cheap and works perfectly

Jonno do you have any pics of your inlet pipe to post up? Also interested to know if yours suffers from any stalling issues?

[femno]

90deg Mandrel 3" pipe + 45deg Mandrel 3" pipe = Custom intake pipe that works with the airbox, I made one the other day.

A bit of chopping, a 3-4" reducer and a 3" sleeve. Just chop the ends off the bov recirc and rocker breather pipes, weld them onto the intake pipe and join with rubber.

[discopotato03]

90deg Mandrel 3" pipe + 45deg Mandrel 3" pipe = Custom intake pipe that works with the airbox, I made one the other day.

A bit of chopping, a 3-4" reducer and a 3" sleeve. Just chop the ends off the bov recirc and rocker breather pipes, weld them onto the intake pipe and join with rubber.

Femno do you have any pics of your pipe ? Also Stainless to prevent corrosion or powder coated mild steel ?

This stalling business , would it have anything to do with the inlet pipe being 4"/100mm to suit the compressor housings boss and reducing to say 3"/76mm close to the mass airflow meter ?

I'm just wondering if having it 3" from the AFM to just before the turbo and stepping up to 4" a little before the turbo would be better . The AFM sets the basic size and I'm not sure if the increased volume (and effects on pressure) downstream of the AFM would have side effects such as the air speed almost stopping in a return to idle situation .

Looking at it from the turbos perspective the compressors inducer is ~ 57mm (56T) and its only the inlets bell mouth insert (if you have the HKS style one) and the diameter of the outer shroud that takes it up to 4"/100mm .

Interestingly one version of the GT3037 Pro S's port shrouded inlet has a 90mm outer shroud and I don't think they suffer any power loss up to an advertised 470 PS . 90mm is a tad over 3 1/2 inches .

From memory non port shrouded T04E compressor housings are 70mm (OD) on the inlet boss so the ID of 3" tube would still be a little larger than that . If you're still not happy with that then 3 1/4 would take the ID up to somewhere around 78mm .

Just to give a bit of an idea of the cross sectional difference I crunched the numbers for 100 90 80 and 76mm .

Expressed as centimeters it looks like this

100mm/10cm Pi x r squared = 78.53 cm square .

90mm/9cm Pi x r squared = 62.62 cm square .

80mm/8cm Pi x r squared = 50.26 cm square .

76mm/7.6 cm Pi x r squared = 45.36 cm square .

It shows more than a 50% increase in area from 80mm to 100mm and once you start to look at it in say a 30 cm long duct and cubic cm's the difference would be ~ 2356cc vs 1508cc . Possibly enough of a difference with the lower volume duct to keep the MAF awake .

Later , cheers A .

Edited September 10, 2009 by discopotato03

[JonnoHR31]

Jonno do you have any pics of your inlet pipe to post up? Also interested to know if yours suffers from any stalling issues?

has never caused me any troubles, just made sure it was all clamped nice and tight and havent touched it since

couple of crappy pics, didnt take any before i put it in unfortunately

http://i224.photobucket.com/albums/dd251/J...17012009055.jpg

http://i224.photobucket.com/albums/dd251/J...22012009058.jpg

Edited September 11, 2009 by JonnoHR31