Garrett 3071r? On Rb20

[huddy]

Hey guys

have a query on results of the Garrett 3071r turbo on a RB20, did a quick search through power thread, but couldnt find much. I have a RB24 so i know it will be slightly different, but i'm after results of this turbo for response (and which exhaust housing) and peak power.

i am considering either this or possibly a HKS 2540 as i have been told that these are capable of 250-260rwkw.

i'm upgrading from a HKS 2530 so i will have this for sale when i find out a result of which one i want to upgrade to.

thanks

-Matt

[paulr33]

forget the 2540, mismatched combo, you should be able to find a suitable garrett new cheaper and more suitable

failing that look at roy's rb20 and copy what he has, works well

[1400r]

^ garrett turbo for under $1,200 hmm were

[paulr33]

most of the vanilla gt28s are $1300

[RB20/30Det_VL]

try a gt30r from slide, has the same core as an hks 3037s, i got one on my rb20 havent driven it yet so cant tell ya spool up, fulboost should be around the 4000rpm mark but would be different on ur rb24

roy has also seen good results from his td06

[1400r]

vanilla wtf

found this link for you huddy

http://www.tweakit.net/shop/index.php?cPat...CFQkmZQod5jJMHA

seems the t28's listed here are mostly $1500+

Edited April 16, 2007 by 1400r

[Birnie]

HKS 2540, as paulr33 said, a bad choice. Search around for older threads and you will see.

It is capable of those figures, maybe a touch higher, but the usable power is right at the end of the rev range.

Robbo (i think, maybe robbo33) went from a HKS2530 to 2535 on the RB25 and seemed to like it.

He has since gone up again but check some of his threads and maybe flick a PM.

[huddy]

so do the 3071's have T3 flange?

[huddy]

up we go - looking into turbo's again, i found that the 3076r, 52 trim, .68 can come in T3 flange, but i have now also heard the 3071 can have the exhaust housing changed to suit T3 flange aswell...

has anyone got results on these 2 turbo's?

[Dale FZ1]

Have a look at Mafia's thread with a 56T GT3076:

http://www.skylinesaustralia.com/forums/in...howtopic=167572

There is a bucketload of detail there, and some discussion about alternative turbine specs too. I've not seen any compressor maps for the 52T GT37 compressor, but presumably they are about 40hp shy of the 56T for maximum power capacity and would offer a bit quicker transient response.

Suggest having a look around freshalloy and ns.com for other discussion about the 3071.

Edited May 23, 2007 by Dale FZ1

[BHDave]

Just to add to your confusion; I get the impression you have been looking at the dodgytech style 3071 with the T2 internally gated housing.

The proper one is only available in a t3 style housing. I can't find my list but -5023 suffix rings a bell (can anyone confirm?)

The 3076 specs you have listed are an odd ball indeed. 52T comp wheels are generally only available on HKS 3037's (but not the pro S) the .68 turbine housing is again an hks only housing and only available on the pro S. If you have found such an oddity then i'd be grabbing it fast as it will be a nice bit of gear i think and well suited to the 2.4.

[R32-DOOR4]

hey, send us a pm with the price of the HKS 2530 when you go to sell it, keen to buy it.

cheers.

[huddy]

so the internal gated 3071r aren't that great?

i'm really leaning toward the Garret GT3076R 52 compressor trim turbo with a Garret .63 A/R intergral wastegate turbine housing (T3 flange).

any ideas what power this should create?

[pixel8r]

I've got a GT3076R (I think) from Adelaide Turbo Services, they're quite expensive (>$2000 just for the turbo). Lag is also quite noticeable, on my RB25 (neo) it reaches 12 psi around 3800rpm so whilst not terrible, its not nearly as good as the stock turbo for response. However when it does start to wind up (usually between 2500-3000rpm) it builds boost fairly quickly and pulls very hard all the way to redline...

Its a good turbo as far as quality goes, double ball bearing and steel wheels. It can handle a lot of boost, probably more than your engine can (reliably).

Mine's mated up to the stock exhaust housing (R34 type, my car is an S2 stagea as in my avatar ) - apparently this gives it better response.

However, the reason i'm posting here is because I'd like to recommend Sliding Performance Turbos. Chat to tangles on here about his, its a direct bolt-on high-flow unit for the RB25 and it cost him less than $1000. The one he got is rated at about 18psi max so they can handle some nice boost as well. The guy that makes/sells these turbos is also on this forum (cant remember if his username is slide or slidingperformance or something like that). Have heard lots of good things about his turbos and they're very affordable.

[Dale FZ1]

so the internal gated 3071r aren't that great?

i'm really leaning toward the Garret GT3076R 52 compressor trim turbo with a Garret .63 A/R intergral wastegate turbine housing (T3 flange).

any ideas what power this should create?

The unit BHDave suggested has a CHRA #700177-5023 on the ID tag. A pretty good unit overall, more responsive but less overall mass flow capacity than the 3076.

It'd be good if someone can source a legitimate flow map for that 52T GT37 compressor assembly, but I'd suggest it would support somewhere in the vicinity of 290rwkW. The 3071 mentioned above will probably support 260-270.

As always it will depend on the systems that support it, and especially the tuning.

Pixel8r sounds like he has similar experiences to others using a turbo from the GT30 family. A bit slow to come on, and then breathes well higher in the rpm range. Those who use the 60mm turbine with the Garrett GT30 IW housing will get even higher max power results but at the cost of some response. It may not suit all needs/tastes.

Edited May 24, 2007 by Dale FZ1

[pixel8r]

As an aside - for anyone wanting to use a GT30 turbo on a daily driver, there is a positive side-effect and that is better fuel economy due to not being on boost between 1500-2500rpm which is where the revs sit a lot of the time when cruising around. With my current mods, turbo, exhaust, SAFC, boost controller (11-12psi) I'm actually getting 2L/100km better fuel economy than when the car was stock and it has a lot more power I'm quite happy with that.

To give you more idea of my turbo lag with the GT30, if I put my foot to the floor when taking off from the lights, it will be well and truly on full boost before I reach the other side of the intersection (gotta love how quickly RB's build revs). Also stagea autos have a large gap between the 1st and 2nd gear ratios and so it drops off boost momentarily on the gearchange. Not much I can do about that. Driving along however, it can go from say 80-120 very quickly. Its sweet spot seems to be around 3500-5000rpm, and would extend right to the redline if my boost controller could hold enough boost.

With a good boost controller, and supporting mods (FMIC definitely!) the GT30 could hold 15-16psi no worries at all, and in fact is likely to be most efficient around this mark (guessing).

Bottom line is, if you're not planning on running 14+ psi through it, then get something SMALLER than a GT30. Hindsight is a wonderful thing Not saying my turbo is bad (its not), just that I dont have the funds to get the most out of it, and there are cheaper turbos which work better at 12psi and besides all that I have now decided that being a wagon it can stay as is and my money will now be used to save for a skyline (as a 2nd car).

[Roy]

pixel8r, always good to get feedback, but comparing a manual RB20 with a GT30 and an auto RB25 with a GT30...likely to be worlds apart.

[BHDave]

so the internal gated 3071r aren't that great?

i'm really leaning toward the Garret GT3076R 52 compressor trim turbo with a Garret .63 A/R intergral wastegate turbine housing (T3 flange).

any ideas what power this should create?

Sorry, I should have been clearer.

The real 3071 doesn't need the turbine housing changed to suit a t3 flange because it only comes with a t3 flange. Both internal and non gated housings are available. The internal housing is a good bit of gear, it's the same as you'll find on the 3076.

[huddy]

ok as for specs guys

engine - tomei forged pistons / new tomei rings, bearings, 1.2 metal head gasket, water pump, etc + 26 rods and crank.

will be running 1.5 bar as max boost (22psi?). supporting mods - gtr inj, power fc, z32 afm, walbro intank, fmic, straight pipes off turbo, ebc, etc...

the 3076r is still probably where i'm aiming at, if it is too laggy for my needs, i'll look into other options (adding cams/gears) to assist.

so no guesses at peak power? i'm guessing 290rwkw ish. for that boost...

cheers

-Matt

[discopotato03]

To save my fingers and so you people can see it on Garretts website .

I'm too illiterate to post links but try searching this www.turbobygarrett/products/turbochargers.html .

Scroll down to Medium Frame and on the right hand side under GT30R you will see the three "GT3071R's" and the real GT3076R .

The top GT3071R is the REAL one and the other two are the "come in spinner" versions .

You will notice that the top one has no turbo assembly or complete unit number and thats because Garrett supply them without a turbine housing . This is done so that the buy can chose which size and style (gated/non gated) he wants and not pay for one he doesn't . If for whatever reason you don't want a Garrett housing (mutter/grumble) you don't have to pay for one .

Have a VERY close look at the turbine mass flow and efficiency tables for the dodge city versions AND remember that being T2/25/28 (same) flanged they won't fit your T3 flanged single turbo Skyline exhaust manifold .

Can the moderators please make the link to Garretts website a stickey , lots of spec details and its easier to quote those and get people to search rather than retread many strings here .

Cheers A .