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Rb20 With Gt30

Drifterdan

By Drifterdan,
in Engines & Forced Induction

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Drifterdan Collaborator

Drifterdan

Posted
Posted (edited)

Hey Everyone,

I'm currently building a rb20 for drifting with (so midrange is pretty important). Anyway I had a gt30 with .63 internal housing, but the courier has lost it etc etc.

What I'm wondering is: What turbo should I replace it with for 240+ kw that isnt "too" laggy.. And do I need aftermarket cams or will adjustable cam gears on the stock items do?

I have had a read through the rb20 dyno thread and the tdo6 and gt30 seem to be the most common turbos at that power output. However all this talk of different trim sizes etc confuses the crap out of me :)

Would it be better to mix and match parts to make the ideal turbo? Similar to what disco potato is doing in his gt30 thread? (id imagine his gt30 is designed for the rb25??)

My setup so far is :

Rb20det

6 boost exhaust manifold

oz power front facing plenum

aerospeed adjustable cam gears

gtr injectors

040 bosch fuel pump

Anyway any help would be apreciated :/

Dan.

Edited by Smooth
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R31Nismoid Grand Master

R31Nismoid

Posted
Posted

If you want mid-range... HKS 2530.

Although, you wont make much more than 220rwkw, but its probably the best choice which will give you the meatiest mid-range you'll ever get from an RB20

Otherwise maybe a set up to a HKS 2835, bigger so little extra power for less mid.

Or even an RB25 hi-flowed turbo would be in that park also and a bit cheaper

But yea, as you have said, the GT30 series is really more RB25 territory, even if you used a .63 rear. It will be quite "peaky".

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The Mafia Grand Master

The Mafia

Posted
Posted
There was a thread on here a few months back where the author had a 2871 core in rb25 housings. Did a quick search, can't find it. Anyone else remember?

Yeap, thats one of my Mates, DaleFZ1. Just send him a PM asking him for the specs. He said the turbo is excellent.

His thread is gone, I think they prune SAU? I think its a silly idea... (to prune good threads)

Can someone confirm, this?

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wolverine Grand Master

wolverine

Posted
Posted

HKS GT-RS is more or less a GT2871 ready to bolt on with all lines elbows etc for around $2700. this will get you into your power range.

certainly you can do it cheaper with garrett gear directly but dale will probably attest to a little running around to achieve his results. when time = money buying a bolt-on might be the go.

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R31Nismoid Grand Master

R31Nismoid

Posted
Posted

2.7k for ONE turbo kit is mighty rich.

GT-SS (twin TT) sells for 3.3k (landed if you pay tax) so 2.7k kit for a single IMO is rich.

The Garrett will be $1700 or less.

When the kit for GT-SS copies is 2.6k vs 3k for the kit (untaxed) then they are worth the gamble of the customs irregularities.

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Dale FZ1 Veteran

Dale FZ1

Posted
Posted (edited)

Here is the thread:

http://www.skylinesaustralia.com/forums/in...=127600&hl=

Has a few pics and other details that might help.

The core used was a 48T GT2871R - CHRA 446179-5031. This is smaller than that used in the HKS GT-RS. The only common componentry between this one and a Garrett GT28RS is the 53.8mm turbine; it has a 71mm (vs 60mm) compressor.

I'm totally satisfied with the performance outcome on RB25. At a guess I would say it would be very useful on a RB20, but allow maybe a few hundred rpm difference in response. It will give lots of mid range punch. Plenty of data log runs shows that on a winding road run I rarely run over 5500 before changing up, mostly run on the fat mid range and early boost.

cheers

Edited by Dale FZ1
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The Mafia Grand Master

The Mafia

Posted
Posted
We do not prune threads.

What on EARTH gives you that idea?

No threads go, no threads get deleted.

Simple

haha jus thought that might have happened becaus I did a search and onl got limited results..

any reason for this?

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wolverine Grand Master

wolverine

Posted
Posted
2.7k for ONE turbo kit is mighty rich.

GT-SS (twin TT) sells for 3.3k (landed if you pay tax) so 2.7k kit for a single IMO is rich.

The Garrett will be $1700 or less.

When the kit for GT-SS copies is 2.6k vs 3k for the kit (untaxed) then they are worth the gamble of the customs irregularities.

latest price from nengun for HKS GT-RS is $2534. as posted before it can be done cheaper buying something without a HKS tag but there is more running around.

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paulr33 Grand Master

paulr33

Posted
Posted

why have u chosen a gt30? from my knowledge of drifting (jack all) you need good average power, bad suspension setup (to make it slide) and good response. i dont think a gt30 will give you any of those attributes on an rb20. a hks 2530 or rb25 should however, cheaper ($500 for an rb25) and then get a really good tune with a real exhaust, should yield good average power. then work the suspension to give maximum sliding ability

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Drifterdan Collaborator

Drifterdan

Posted
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Posted (edited)

I take it your askign me?

I was only using the gt30 as it was only costing me 1300 brand new and had the rb20 friendly .63 housing. I knew it would be laggy but just wanted to try it out :)

Doesnt matter now as it got lost in the mail. Looking at a highflow turbo now.

Cant say I agree with the "you need crappy suspension to drift" line though :iluvff: My car is set up to grip, with with good tyres. Id get better tyres but until the car is going, I wont know if it can spin anything more sticky :P You still need grip when your sideways remember :ninja:

Edited by Smooth
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