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[INFO] Before & After GCG Turbo Hi-Flow

juicen

By juicen,
in Engines & Forced Induction

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juicen Explorer

juicen

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Hi kids,

I just wanted to post before and after pics of taking the GCG Turbo upgrade path for those that are interested. Can never have too much info!

I bought a second-hand RB20 turbo and shipped it down to be rebuilt & hi-flowed. Here are the pics:

before-comp.jpg

after-comp.jpg

before-rear.jpg

after-rear.jpg

I will post dyno comparison soon (hopefully) when I finally get it bolted on.

Cheers,

Jason

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juicen Explorer

juicen

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I bought a stock, 2nd-hand RB20 turbo for $250. The hi-flow cost me $1950 plus shipping to and from (about $20 each way from Gold Coast, QLD). It took around a week-and-a-half to get back.

Its rated at 450hp according to their website.

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nedb Proficient

nedb

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I'm looking forward to seeing the results.

So I guess they did the same thing they would have done to the RB25 turbo when hi-flowing to 450hp.

I wonder if it makes the difference which one they use?

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juicen Explorer

juicen

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i rang them before-hand and asked if there was any physical difference (because theres a decent price difference between buying a 2nd-hand RB20 turbo and an RB25 one!!!) and they said there was none - so thats why I went with the RB20 (cheaper) one

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darrinspencer Grand Master

darrinspencer

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Can you measure the machined inlet diameter size of the compressor housing

I would like to compare it to my high flow on my RB25

I do not who built mine, it does not have a XTR badge on it and it is a Rb20 compressor housing, which has a smaller compressor oulet diameter than the stock RB25 turbo I took off.

Does anyine know if they use the same size compressor wheel in the Rb20 and Rb25 compressor housing?

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G.P.P Newbie

G.P.P

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Yeh that's pretty expensive, but comming from GCG they charge hard. I can supply T3/T4 Garrett Hybrid pretty much half that amount. If anyone interested pm me.

Need to pm admin to discuss promoting my online business on the forum. So can anyone help me.

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4door_Sleeper Veteran

4door_Sleeper

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I have just installed a high flow in my RB25DEt, and it was better value than a HKS 2530.

Its a direct fit, and boost comes on just as good as standard.

From what I can measure so far it improves flow (and kw) by about 20% at the same boost, but has the ability to boost much higher. At this stage I am only running 14psi and get 220rwkw vs my std turbo that got around 180rwkw

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juicen Explorer

juicen

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More to the point, when the hell did you get a laural!?

And what engine is in the laural?  RB20 Id guess.  Really interested to see how it goes hey.

haven't got it yet - still waiting for it to be fixed and registered - but yeh its an R32 RB20.

at the moment its only got the stuff in my signature - not sure what boost its running but it goes pretty average - hopefully the GCG turbo will make it a little more exciting with a bit more boost - and hopefully it spools OK.

i'm wondering if i'll have to get a new dump pipe or whether the existing one can be machined to match the rear housing??

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dangerous_daveo Grand Master

dangerous_daveo

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oh and I don't mind spending 1950 as long as its brand-new-reliable, and I don't have to change any piping or oil lines etc!  been thru all that before too many times!!  pipes/lines/silicon/clamps - it all adds up in the end!!

Or did back in the twin turbo days, but you have now seen the light :thumbsup:

But hey, its about the same price as most of the other similar options. I hope it works. Might be worth it on mine.

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