HKS Turbo's vs Garrett Turbo's...

[MattSR]

Warpspeed - that's exactly what I was looking for

I remember a person on another now defunct forum called lott004... who was a garrett engineer as well.. he was a bloody helpful and friendly bloke too... Is this the same person?

Cheers,

Matt

[Warpspeed]

Warpspeed - that's exactly what I was looking for

I remember a person on another now defunct forum called lott004... who was a garrett engineer as well.. he was a bloody helpful and friendly bloke too... Is this the same person?

Cheers,

Matt

Yes, its the same guy. He has in the past been swamped by morons and people begging for compressor flow maps that Garrett will not make public. So he stays hidden these days. Don't blame him either. Hehehe.

[MattSR]

Fair enough.

I never spoke to him personally, I just remember his posts as being actually worth reading -A definite deviation from the norm.

Matt.

[jezzrrr]

I have a GTR with GT-SS turbos going on in the next few weeks, and am willing to partake in the comparison as well.

Merli,

What made you go for the GTSS's, I am considering getting a pair on my 34 ?

JezzA

[Harry]

See results of todays efforts below from my Garrett GT35. This was on 97RON at 1.6 bar. 1.6bar reached at 4100rpm. Mapping not finished today so not final.

("touched up" to compensate for bad scan - results are dynapack @ hubs)

[NickySantoro]

HKS purchase there turbines from Garret. Then modify them to there own standard own engineering. Buying a HKS unit is better, but you are also paying for the name.... which isnt too bad cos the names good. hehe

[Merli]

Jezz,

I'm more of a circuit racer than a drag racer, and as such, I want as much response as possible.

I considered the 2530s, which are meant to be "the best turbos for street and track", but I can't understand how that can be when they come on 500rpm later than stock turbos.

The GTR is laggy enough as it is, in fact when I first test drove one, after owning two GTS-ts, I thought that the engine was busted. Seriously.

So the GT-SS are meant to come on earlier than the stock turbos, AND make more power (I've been told 320kw @ all four is possible, but I'm aiming for 300kw @ all four) which sounded perfect for my needs.

I'll let you know how they go when they get installed, which has been pushed back another month or so now that I'm waiting for forged rods to come from the US

[T0nyGTSt]

Andrew... I think everyone has seen the Best Motoring Mines 34 video.

Would you call that spooling up late? It's perhaps a bit hard to tell as it spends all its time above 3,000 but I'd imagine it's the total package making for the response (ie. VX-Rom, cams etc.)

T.

[Merli]

Andrew... I think everyone has seen the Best Motoring Mines 34 video.

Would you call that spooling up late? It's perhaps a bit hard to tell as it spends all its time above 3,000 but I'd imagine it's the total package making for the response (ie. VX-Rom, cams etc.)

T.

Yes. everyone has seen it, and if you look closely, it never falls below 4000rpm, except for once or twice and when it pulls from 3000rpm, it's nothing like the pull it gives when exiting a 4000rpm corner...

In reality, stock GTRs hit decent boost at 4000rpm, and 2530s lift that to 4500rpm, and that's extra lag that I don't need.

2530s might be fine for trackwork, but they won't be as good as the GT-SS or standard turbos for street use, where you are mostly around 2000-4000rpm.

This is all theory btw, I'll let you know how these GT-SS go in about a month's time.

Perhaps 2530s are ultimate for the track, but they certainly aren't ULTIMATE for the street. There are better.

edit: Maybe Mines are able to lower the rpm when the 2530s kick in with their combination of parts and tuning, but unfortunately I don't have the money for a Mines crate engine

[Miss DR30]

Yes it's true that Garrett make HKS turbo chargers, but also a majority of sports compact racers in the USA use Garrett Turbochargers not HKS. On the Japanese HKS website it lists the different sizes of turbine wheels, these are the same sizes on the Garrett turbos. We purchase a range of turbos from a company called Precision Turbo and Engine and one of these is a GT37 we retail this turbo for $1850 now the closest comparison to this in the HKS range is a ball bearing one which on the HKS USA site retails for about $3880 US, (ball bearing and non ball bearing is whole other argument) and this only has a TO4E cover on it.

[Roy]

Andrew... I think everyone has seen the Best Motoring Mines 34 video.

Would you call that spooling up late? It's perhaps a bit hard to tell as it spends all its time above 3,000 but I'd imagine it's the total package making for the response (ie. VX-Rom, cams etc.)

T.

Yeh awesome footage, but it was also using +9,000rpm rev limit on a modded engine, id love to see that footage in a std weight R34 GTR with std engine and 2530s :headspin:

Fair to expect quite a difference in performance? :confused:

[Zheng Ye]

I want to buy a garrett but I really need a part number. can anyone help?

[sewid]

Check the Garret catalogue here:

http://www.turbobygarrett.com/turbobygarre.../downloads.html

but dont expect it to tell you exactly which turbo you need.

[T0nyGTSt]

That Garrett catalog is a bone of contention on PF.

It seems that the last catalog implied that everything was BB.

Now it seems only certain models are.

T.

[Sydneykid]

Hi Merli, we have just tuned another GTR with 2530's (an R33 this time), it makes more power EVERYWHERE than it did with the standard turbos. It makes more power off boost, as well as on boost, maxed at 310 rwkw. It makes 1 bar 250 rpm earlier than it did with the standard turbos. The only extra bits it has, other than turbos themselves, are the HKS split dumps and a tune.

I am not the only one, I suggest you have a look at MarkR34GTR's recent results with 2530's.

If there is a better combo (road and track) turbo than a pair of 2530's on a 2.6 litre GTR, I have yet to see it. Remember I am not a HKS fan, if there was something better I would use it. But I can't find them and I have been looking for 4 years. If anybody can produce a better all round dyno graph on an internally standard RB26DETT, then I'll be pleased to eat my words.

[Merli]

Well if I am able to bring the turbos on 500rpm earlier than stock with my GT-SS turbos, would that be better for street than GT2530s in your opinion?

[the phantom]

Hi all,

I've asked this elsewhere but I believe it may be more appropriate here as this eems to be the house of expertise...

I've seen lots of claims of "Garrett GT3040". Unless I am completely missing something, what is this turbo exactly? I certainly cant find an official reference to it by Garrett. GCG's web site say GT3040 and quote a part number GSB8005A. I have a Garrett SB8005A and I cant see where the '40 comes into it, it has a T04s compressor not a GT40 and is a GT30 series turbo. Are they making hybrids and adding the HKS naming for marketing reasons or have I missed something??

[SMB315]

the hks 2530 versus a garret simmalar item has got so much more potential, more power, smoother flow and a simple jab of the right pedal can light up the rears nstantly.

garrett send hks the housing then hks start their own little process on shaving the insides, different internals and a wheel that only hks can get.

mines gtr, perfect example.

[Sydneykid]

Hi Merli, you asked "if I am able to bring the turbos on 500rpm earlier than stock with my GT-SS turbos, would that be better for street than GT2530s in your opinion?"

Yes, if the GTSS's make more power than the standard turbos EVERYWHERE, then they are better than the standard turbos. But in order to be better than 2530's they have to make more power EVERYWHERE than the 2530's.

If the result is mixed, GTSS's better at low rpm and 2530's better at high rpm, then we can argue about which is better forever and not get a result. I would argue average power over the rpm range used is as good a method as any. So if you want to do a comparison then let's do it, here is my submission based on Mark's result, since it is published on this forum.

296 rwkw @ 7250 rpm

295 rwkw @ 6750 rpm

292 rwkw @ 6250 rpm

280 rwkw @ 5750 rpm

240 rwkw @ 5250 rpm

200 rwkw @ 4750 rpm

140 rwkw @ 4250 rpm

249 rwkw Average

So in my opinion if GTSS's make 249 rwkw average between 4,250 rpm and 7,250 rpm then they are better than 2530's for all round use.

Over to you.

[DoughBoy]

SK, i'm not sure that doing a comparison based on those revs (4250 ->7250) is going to be that valid. I'm pretty sure that a big single could whip those figures at all rpms quoted - does this mean a T88 is better than 2530's?