Highflowed Turbo Help

[Slattery Gts-t]

Hoping someone can give me a bit of information here,

I recently brought an R33 gtst and the bloke i got it off said it had a highflowed turbo but thats all he knew about that. The impeller is aluminium and being a series 2 it should be nylon so this leads me to believe it probably has been highflowed.

My questions are is there any way to tell for sure it has been highflowed? How much boost is "safe" for a highflowed turbo? also where might it have been highflowed how many places actually do it ?

Oh and the car has 3' pipes from turbo back, Pod and a big FMIC

Edited October 6, 2011 by Slattery Gts-t

[zebra]

look for ID tags on the turbo, or pull the dump pipe off and compare what you see to a image search of standard turbos

[The Mafia]

Also, the compressors or turbines arent made of nylon at all, ever, on any turbo.

[R31Nismoid]

The age old - How long is a piece of string?

There are 100s of places that could hi-flow a turbo, and to any specification.

If it's a hi-flow, it is very possible it wont even have an ID tag - or that it's even correct.

The only way to really know is the following:

1. Find out from previous owner who made it, and any reciept/info/specs

2. Pull the turbo off, measure both the front and rear wheels = 100% known specs.

Unless you do this all you can do is wind boost into it, tune accordingly, see what happens.

[Slattery Gts-t]

Ok took the turbo off today

It has an id tag from MTQ engine systems with a serial number and part number, also the impeller is 69MM across ( I took the impeller housing off to measure ), The inner diameter of the outlet tube is 52MM from memory

[pipster11]

Also, the compressors or turbines arent made of nylon at all, ever, on any turbo.

actually 25neo turbos have nylon compressor wheels and ceramic exhaust wheels

nylon reduces the mass moment of inertia of the wheel = less lag

[The Mafia]

So you're saying the whole wheel is made of nylon?

[pipster11]

So you're saying the whole wheel is made of nylon?

pretty sure, only the front wheel tho

i pulled my turbo off to change gaskets and the front wheel was black (not from dirt)

[The Mafia]

I think you better go back and do your homework. Something that spins at 100,000rpm cannot be made of nylon.

Do you even know what sort of torture a turbo charger goes through?

[siksII]

The whole compressor wheel is made of some type of plastic/nylon in late r33/r34 gtt turbos.

[The Mafia]

It's not a hair dryer, or a electric supercharger.

It's a turbo charger. They can reach speeds of up to 150,000 rpm,nare balanced to perfection, and have a lot of pressure applied to the compressor wheel due to physics.

Do you think something made of plastic or nylon would be able to withstand this?

Have the people crapping on about them being made of plastic even seen a real one?

I guess the pistons inside your engine need to be light, so let's just make them out of plastic too?

[Dingus]

A quick search brings up multiple threads with people saying it is a nylon composite compressor wheel, but surely everyone must be wrong because you are clearly correct?

[The Mafia]

So you're just going from what the internet says, with nonform of confirmation, or have you actually touched one, and inspected one closely?

You obviously haven't. You also obviously don't realise how much stress a compressor wheel has to endure.

[Room42]

I have 2 r33 stockers at home and I promise you they are not metal.

[The Mafia]

The last few ive touched have been some sort of light weight alloy. Not plastic.

[siksII]

Mafia - they are really Nylon - i know it doesnt seem likely but I have swapped my stock turbo with another one plus seen a whole bunch of others at the wrecker first hand and in this case the internet is correct - take a look at one if you can and you will see that it is really some sort of black plastic.

I will have my turbo off in around 1 week and will happily post a photo of the compressor.

[siksII]

If the ones you saw were metal then they were not from a late model r33 or R34. In fact I think very late model R34s switched back to metal again (cant remember for sure)

[fastjetjockey]

I'd take a chance with it then mate, if it's stamped and the diametres are bigger than factory. Other than that, get back onto the guy you bought it from and try and get some receipts or something.

Re: Nylon Compressor wheel. I have a R34 with a Neo RB25 in it. It has a stock turbo on the side. Said stock turbo has a nylon synthetic polymer compressor wheel. It's okay for your mind to be blown every once in a while mate.

The funny thing about the limitations of the stock turbo though, is the ceramic turbine wheel is what fails first under heat load. Go go fantastic plastic!

[GTScotT]

So you're just going from what the internet says, with nonform of confirmation, or have you actually touched one, and inspected one closely?

You obviously haven't. You also obviously don't realise how much stress a compressor wheel has to endure.

The funny thing about the limitations of the stock turbo though, is the ceramic turbine wheel is what fails first under heat load. Go go fantastic plastic!

LMFAO.

Just when you think you knew it all...

FANTASTIC PLASTIC COMES TO COCK SLAP YOU IN THE FACE!!

[lilcrash]

Just a note, my series 2 rs4s turbo front wheel looks to be an metal looking compound where the chunks are missing, looks similar to cracked aluminum texture. I have it sitting on my bench without a front housing if someone wants a pic. It may be nylon, I'm not saying for sure what it is but to me personally it looks metalish.