Rb25 Turbo Upgrade.

[Lithium]

they may be capable but not many get there on std engines, 270-280 seems the average

Thats not turbo limitation, its the owner holding back to keep things safe. When I had a bad wastegate setup I had boost creep - hit 20psi by 5700rpm and was making 270rwkw with power climbing HARD before we backed out. There has been nothing stopping me from winding the boost up but I figure there is a reason I have a 160,000km+ completely unopened RB25DET still going strong after plenty of thrashing etc etc. If I decide I am ready to rebuild motor I'll probably wind the boost up and see what it will take for a bit first.

as for hks vs garret, unless you get a good deal like Lee did I dont think it's worth the extra $$I read somewhere that the HKS have there own blade design on the comp wheel, but yeah physical dimensions are the same

Absolutely, buying a used GT3076R setup would be cheap too - and the wheel design thing is all heresay. HKS in some instances (ie T51R, GT2530...) use combinations of wheels which are licenced to them specifically but they are Garrett wheels. I have proven in the past to someone with turbos right in front of us that some (ie, GT3076R and GT3037, GT-RS and GT2871R) turbos are EXACTLY the same wheel wise etc. They are the same damn part number, mine even had GT3037 56T stamped on the core lol.

Edited April 16, 2009 by Lithium

[JonnoHR31]

yer myne had the same stamped on it.

they wont make 300 on all 25s, myne for example is tuned at 17psi and makes 250rwkw. tuner said he tried more boost and had to pull lots of timing to stop it pinging. my guess is too much backpressure from the gate area. but even so 250+rwkw is decent for an internal gate setup

[Lithium]

This reminds me, Oz was flooded with some random GT3076R thing which GCG used to (or still do?) sell with a .70a/r EC-1 housing which didn't seem to make the power the real GT3076Rs do. My GT30R never pinged on the dyno, power would just stop climbing after a certain point.

[R31Nismoid]

Jonno - Id be likely to bet you dont have the genuine Garrett "-IW" housing for it.

[JonnoHR31]

pretty sure its genuine, has the larger gate flapper option too. best way to check?

[(OO)Firty Free(OO)]

Thats not turbo limitation, its the owner holding back to keep things safe. When I had a bad wastegate setup I had boost creep - hit 20psi by 5700rpm and was making 270rwkw with power climbing HARD before we backed out.

I have proven in the past to someone with turbos right in front of us that some (ie, GT3076R and GT3037, GT-RS and GT2871R) turbos are EXACTLY the same wheel wise etc. They are the same damn part number, mine even had GT3037 56T stamped on the core lol.

With my car detonation was holding it back from making 300 safely, anything over 17-18psi the car was not happy on PULP. I'm sure a head gasket would have fixed that tho.

Just for some fun i went out this morning and checked the part number (had to look hard with lead light the eyes not what they used to be). Mind you i couldnt see the other number as the line was in the way.

GT3037 56T

70177-5007

And from Mr Disco.

Garrett family of GT30 UHP Turbine based turbos , aplication HKS / Garrett .

Next time you say you have a "GT30R" it could be any of these or maybe others .

Unit part no , CHRA , Note no .

700382-0001 , 700177-0001 , 01) Unknown but maybe 2835 48T , 84T Turb

700382-0002 , 700177-0002 , 02) 2835 52T , 56.6mm 84T Turbine .

700382-0003 , 700177-0003 , 03) 2835 56T , 56.6mm 84T with .64 a/r .

700382-0004 , 700177-0004 , 04) 2835 56T , 56.6mm 90T Turbine .

700382-0005 , 700177-0001 , 05) Unknown .

700382-0006 , 700177-0002 , 06) 2835 52T , 56.6mm 84T Turbine .

700382-0007 , 700177-0003 , 07) 2835 56T , 56.6mm 84T with .86 a/r .

700382-0008 , 700177-0005 , 08) Unknown , suspect GT3037 48T .

700382-0009 , 700177-0006 , 09) GT3037 (GT30R) 52T , 60.1mm 84T Turbine

700382-0010 , 700177-0006 , 10) GT3037 (GT30R) 52T , 60.1mm 84T Turbine

700382-0011 , 700177-0007 , 11) GT3037 (GT30R) 56T , 60.1mm 84T Turbine

700382-0012 , 700177-0007 , 12) GT3037 (GT30R) 56T , 60.1mm 84T Turbine

700382-0013 , 700177-0008 , 13) Unknown

700382-0014 , 700177-0009 , 14) GT3040 , 50T GT40 Comp , GT30 Turbine .

700382-0015 , 700177-0008 , 15) Unknown

700382-0016 , 700177-0009 , 16) GT3040 50T

700382-0017 , 700177-0001 , 17) Unknown .

700382-0018 , 700177-0002 , 18) 2835 52T , 56.6mm 84T turbine .

700382-0019 , 700177-0003 , 19) 2835 56T , 56.6mm 84T Turbine .

700382-0020 , 700177-0004 , 20) 2835 56T , 56.6mm 90T Turbine

700382-0021 , 700177-0004 , 21) 2835 56T , 56.6mm 90T Turbine

700382-0022 , 700177-0008 , 22) Unknown

700382-0023 , 700177-0009 , 23) GT3040 50T (.70a/r) , 1.12 Turb a/r .

700382-0024 , 700177-0003 , 24) 2835 56T , 56.6mm 84T Turbine .

Seems mine has a 5xx7 where most have 0xx7?????????

Edited April 16, 2009 by RB25DETS2

[R31Nismoid]

That'll just be a designation that its not garrett, its HKS made by garrett or something along those lines

[Lithium]

Just for some fun i went out this morning and checked the part number (had to look hard with lead light the eyes not what they used to be). Mind you i couldnt see the other number as the line was in the way.

GT3037 56T

70177-5007

And from Mr Disco.

700382-0011 , 700177-0007 , 11) GT3037 (GT30R) 56T , 60.1mm 84T Turbine

700382-0012 , 700177-0007 , 12) GT3037 (GT30R) 56T , 60.1mm 84T Turbine

Seems mine has a 5xx7 where most have 0xx7?????????

Mine has the "5" as well, as with all the GT30Rs I have seen. Check this thread: http://www.skylinesaustralia.com/forums/Gt...et-t222781.html.

There is reference to that part number in my GT3076R upgrade thread I posted back when I was doing it as well when people were asking how to identify the proper Garrett GT3076R. ATPTurbo also can sell you a new compressor cover for your GT3076R if you damage it or what to bling one up

http://www.atpturbo.com/Merchant2/merchant...tegory_Code=HSG <- look at the part numbers they refer to

Edited April 16, 2009 by Lithium

[(OO)Firty Free(OO)]

Mine has the "5" as well, as with all the GT30Rs I have seen. Check this thread: http://www.skylinesaustralia.com/forums/Gt...et-t222781.html.

There is reference to that part number in my GT3076R upgrade thread I posted back when I was doing it as well when people were asking how to identify the proper Garrett GT3076R. ATPTurbo also can sell you a new compressor cover for your GT3076R if you damage it or what to bling one up

http://www.atpturbo.com/Merchant2/merchant...tegory_Code=HSG <- look at the part numbers they refer to

If it were a 3076 it wouldnt bolt straight up to my standard exhaust manifold would it? Don't you need a spacer for the Garrett?? Either way i know i'm not right all the time just most lol. So the CHRA is the same is the wheel design the same also? Find that answer for me cause i cant.

[Lithium]

If it were a 3076 it wouldnt bolt straight up to my standard exhaust manifold would it? Don't you need a spacer for the Garrett?? Either way i know i'm not right all the time just most lol. So the CHRA is the same is the wheel design the same also? Find that answer for me cause i cant.

I mentioned in an earlier message that Garrett sell GT3076Rs without the turbine housing, the one HKS put on it is spaced out and flanged to make bolting on easy. Thats one of the neat things with the HKS turbos - the most tangible advantage is they take the homework out of installation, you know you can buy it and bolt it up to most of the stock gear. In terms of the CHRA, the CHRA is the rotating assembly - the wheels, bearings etc etc are EXACTLY the same parts on the GT3076R as the GT3037. Hence the fact they are they same part number If you have a bearing failure in yours you can just order another "70177-5007" core from Garrett and bolt your housings onto it and you will be good to go. As I mentioned earlier, thats why I refer to them as one and the same things as they really are the same moving bits.

No worries anyway, we're all wrong sometimes - I have been over this heaps/ages ago when I was researching what I wanted.

[(OO)Firty Free(OO)]

I mentioned in an earlier message that Garrett sell GT3076Rs without the turbine housing, the one HKS put on it is spaced out and flanged to make bolting on easy. Thats one of the neat things with the HKS turbos - the most tangible advantage is they take the homework out of installation, you know you can buy it and bolt it up to most of the stock gear. In terms of the CHRA, the CHRA is the rotating assembly - the wheels, bearings etc etc are EXACTLY the same parts on the GT3076R as the GT3037. Hence the fact they are they same part number If you have a bearing failure in yours you can just order another "70177-5007" core from Garrett and bolt your housings onto it and you will be good to go. As I mentioned earlier, thats why I refer to them as one and the same things as they really are the same moving bits.

No worries anyway, we're all wrong sometimes - I have been over this heaps/ages ago when I was researching what I wanted.

Cheers for that mate i still have a bit to learn it seems, good to know that i can buy a garrett cartridge and i will be good to go considering how hard i'm pushing the poor bugga

[dangerman4]

Lith can you explain that Honda dyno print out you put up?

from what i can see the 30 has slightly more power off boost but once they both start ramping onto boost the 35 keeps going where the 30 stops.

is this correct?

Edited April 17, 2009 by dangerman4

[Lithium]

Lith can you explain that Honda dyno print out you put up?

from what i can see the 30 has slightly more power off boost but once they both start ramping onto boost the 35 keeps going where the 30 stops.

is this correct?

Reasonable correct, the GT30R up to around 6k has more power - as much as 200whp more at points through the midrange (5-5500rpm), which I wouldn't call slightly more. Eventually the GT30R maxes out (410kw @ wheels.....) while the GT35R keeps going, which makes sense as its a much bigger turbo.

So yes, when you run both turbos up to 2.2bar on race fuel the GT35R makes quite a bit more power - any idiot would know thats going to happen. I posted it as it'd be neutral honest input as to how far both can go when pushed hard, on an ideal and equal setup. The GT30R monsters the GT35R up past the midrange, the GT35R wins on top end (if you run high enough boost). If you run both of them on pump gas and 1-1.3bar the GT30R will basically dump on the GT35R for the first part f the rev range - then give nothing away up high which has been proven many a time.

The only point the GT35R will start winning is when the GT30R starts maxing out, which the guy in this thread is not going to reach that point as he will be running under 20psi - as such a GT30R would be a much better choice. I can't make it any more obvious that that, so will leave it at that

[180or200]

200hp? wha, where

[Lithium]

200hp? wha, where

Sorry my bad, looked at it again - its "only" 150whp Look around the 5000rpm range at the valley between the GT35R line and the GT30R line.

Edited April 17, 2009 by Lithium

[180or200]

ah ok I see where you mean now, seems alot still, my head hurts, might be some wheelspin involved there i'd say looking at how wavey both lines are or the tune is a little rough!

Edited April 17, 2009 by 180or200

[dangerman4]

so for 500 rpm you have more power with the 30..

but from 7k till 9 k the 35 pulls harder and harder and harder.

the 30 dies in the ass

thats 2000 rpm of goodness right there not 500 rpm....

Edited April 17, 2009 by dangerman4

[Lithium]

so for 500 rpm you have more power with the 30..

but from 7k till 9 k the 35 pulls harder and harder and harder.

the 30 dies in the ass

thats 2000 rpm of goodness right there not 500 rpm....

OK its like banging my head against a brick wall here, so this is my last post in this thread. I'll try and spell it out as simply as possibly in easy to follow bullet points for you to follow so all the info is easy to access:

- The guy wants:

i kinda want a turbo that makes 250rwkw at 1bar and perhaps 280-300 at 1.3bar-1.4bar

which a GT30R has been proven time and time again to do piece of piss

- Dyno plot of GT30R vs GT35R maxed out on race gas overlayed:

- Dyno plot shows GT30R destroying the GT35R in power delivery UNTIL it reaches ~500hp @ wheels (aka 373kw @ wheels)

- Guy who posted the thread wants up to 400hp @ wheels, which is safely under the GT30Rs choke point

I have said before on a full on race motor a GT35R will beat the GT30R, so you stepping up and pointing out that the GT35R flows more after 5800rpm (actually where the GT30R would hit choke at ~500hp - unsurprisingly for a turbo rated to that area) is not really overly amazing. So, aside from the fact that the GT30R (see easy to find dyno plot above) actually makes more power from 2500rpm up to 5800rpm with a max distance of 150hp, or 3300rpm of goodness as opposed to 500 or even 2000rpm .... he is also aiming for WAY under the power levels demonstrated there.

Going by your logic so far he should use a GT47R, you should see how much more power under the curve on Mark Jacobsons car it makes than if it had a GT3582R both on 2.5bar or so running Methanol.

Edited April 17, 2009 by Lithium

[180or200]

since litho aint posting again lets all gang up on him, LOL,

why we looking at this graph anyway, it's not from an RB, also without seeing the boost graph anything before the ramp dont mean shit, IMO, thats what the head banging is all about isnt it "opinion"

[dangerman4]

buy the turbo that suits u the best.

he is interested in drag racing, so why buy a street turbo.

if he wanted to be fully hectic on the street with dose pipes etc then go the 30.

otherwise for mph reasons 35 all the way,

dont your sheep need milking or something?