No Hi-flow

[R338OY]

Hey all,

Just discovered i've had a hi-flow turbo hidden under my heat shield

Ahh, it sort of changes around my mod plans a little (meh) so i need some opinions on what comes next.

The turbo uses factory housing though is: Ball-bearing, has 2 compressor wheels, unsure about exhaust wheel but am assuming it's steel.

I have a cat-back exhaust (for now) and an R34 side-mount (on an R33) with factory ECU and fuel system.

What can this turbo realistically make?

What mod plan will i be looking at for possibly 250rwkw on a fairly mediocre/sleeper street setup? (i.e. something that doesn't spiral into a race-spec monster)

I'm thinking:

Front mount

Full 3in exhaust

Piggyback as a minimum + tune

Fuel Pump

Bigger Injectors

Fuel Pressure Regulator

Heavy Duty Clutch

Possibly Oil cooler

Cheers

Edited December 9, 2007 by R338OY

[Krishy]

you will easily get that power with those mods and a slightly higher boost mate...good luck

[Dale FZ1]

Just discovered i've had a hi-flow turbo hidden under my heat shield

What can this turbo realistically make?

Great find, if it is what you suspect. Is it a GCG type, or a Garrett core into stock housings, or something else?

What power it will support is dependent on the exact specification of its internals.

Once you know that, there is heaps of information to be found in the stickies.

[H@ME]

congratulations on this find! wish i could find the same..(maybe i should look) ha! i think you will easily make that power with those mods and a good tune! As dale said you really need to know the specifications of the turbo internals! GL man! hame

[R338OY]

Great find, if it is what you suspect. Is it a GCG type, or a Garrett core into stock housings, or something else?

What power it will support is dependent on the exact specification of its internals.

Once you know that, there is heaps of information to be found in the stickies.

Yeh not sure about internals yet. All i know about brand is that it's factory housing. My mechanic is pulling it off to fix my exhaust manifold so i'll find out details soon. I was surprised to hear it has two compressor wheels- never heard of that setup before (i'm not an expert)

It's wierd that the previous (Japanese) owner had it without supporting mods...

Sounds like an angry streeter is on the way...

[DRD-00F]

Piccies?

[Dale FZ1]

I was surprised to hear it has two compressor wheels- never heard of that setup before (i'm not an expert)

Does it look something like this?

If so then that's quite normal. Two rows of blades, one higher and larger than the second set.

If you had a two stage compressor, with two completely separate rotors then it would indeed be something special.

Keep us posted, and show a pic or two.

cheers

[R338OY]

Here's my engine bay:

Here's what appears to be a sh!tty looking turbo:

That's the exhaust housing. I'll post more details about the turbo when my mechanic calls me.

[R338OY]

Ok here's the pics:

I'm lost when it comes to turbos. Tell me what i've got and what it can do. Comments comments please!

This is the turbo out.

Compressor housing.

Turbine housing. Dirrty!

On the right is the exhaust manifold stud which broke of inside the block. Sucks! All studs were replaced so nothing to worry about.

[johnnybaby]

looks like a stock turbo to me

[Wheezy]

Stock RB25 Turbo

[Simon-S14]

indeed it is, thats a stocker, no evidence of high flowing at all

find another mechanic

[R338OY]

Sh!t that sucks. What if you're all wrong?

[Equinox]

Stock S2 turbos are Ball Bearing and have the twin blades you describe.

What made you think it was aftermarket?

[R338OY]

Stock S2 turbos are Ball Bearing and have the twin blades you describe.

What made you think it was aftermarket?

My R33 is series 1...you're saying S2 are ball-bearing. Are S1 the same or is it a S2 turbo?

I assumed it was factory. Mechanic inspected it (and took the pics) and said it was "factory housing but hi-flow. It's ball bearing and has twin compressor wheels" blah blah.

So i took his advice. Guess now with pics i can see it's not.

Meh

Edited December 9, 2007 by R338OY

[fEkuaR]

Your mechanic has NO idea. No idea at all....

My R33 is series 1...you're saying S2 are ball-bearing. Are S1 the same or is it a S2 turbo?

I assumed it was factory. Mechanic inspected it (and took the pics) and said it was "factory housing but hi-flow. It's ball bearing and has twin compressor wheels" blah blah.

So i took his advice. Guess now with pics i can see it's not.

Meh

[Simon-S14]

My R33 is series 1...you're saying S2 are ball-bearing. Are S1 the same or is it a S2 turbo?

I assumed it was factory. Mechanic inspected it (and took the pics) and said it was "factory housing but hi-flow. It's ball bearing and has twin compressor wheels" blah blah.

So i took his advice. Guess now with pics i can see it's not.

Meh

the stock turbos have ball bearings, Bi comp wheels... and no we're not all wrong, if it were a high flow (even with stock housings) the housings would be machined out with larger comp and turbine wheels fitted.

so yeah, find another mechanic

[R338OY]

Your mechanic has NO idea. No idea at all....

the stock turbos have ball bearings, Bi comp wheels... and no we're not all wrong, if it were a high flow (even with stock housings) the housings would be machined out with larger comp and turbine wheels fitted.

so yeah, find another mechanic

Ok ok point taken. Well as least i've had an inspection and KNOW what's happening.

Oh and my boost leak problem (the reason for mechanic work) is still unresolved. I'm finding a lack of KICK that i used to have from low RPM.

Before i'd press throttle- WHAM! Snapped spinal cord with my head lodged INSIDE the headrest lol

Edit: To give you an idea, when i first put in my boost controller i'd make 10psi by about 3000rpm.

Now i press throttle...wait for it...no no it's not drag setup lag...it's stock turbo & intercooler...very responsive...ok ok we're hitting 3000rpm...pssshtt. Sh!t all sound and power compared to before.

Yeah what else can it be? I'm gonna get an inspection with the same mechanic...lol just kidding. Yeh there's something amiss here.

Edited December 9, 2007 by R338OY

[Simon-S14]

what was the manifold to turbo gasket like? I had same probs as you with stock turbo and over time it got less and less kick. I upgraded to a garret and when i took the stocker off i found that the gasket was blown out.

Other issues could be timing, cooler pipe leaks, dirty air filter, plugs/misfire issue etc etc lits goes on

[Birnie]

I know you seem to have moved on from the High Flow claim....but for future reference...this is what everyone was looking for

(Original turbo on the top with higflowed pics below.....)

http://www.gcg.com.au/Catalogue_Menus/Upgr...pgrade_gtst.htm