Jump to content
SAU Community

Recommended Posts

Uh guys, you might have noticed he has an RB20 or 25 powered car. Odds are on the fact he is using a single turbo setup, which probably has a T3 flange. All of the HKS 25xx series with the T3 flange DO NOT have the custom HKS compressor cover, but use a Garrett cover with the center machined out and an aluminium insert held in by 4 hex screws.  

The only HKS markings on the T3 range are on the exhaust cover, and on the metal tag on the center catridge.

Standard actuators work fine with those turbos too, so no dire need to run a HKS actuator.  

Just my 2 cents, no need to jump on the bandwagon and drill someone over this...

Even HKS 2530s I have seen for S15s have the HKS embossed compressor cover... Do they use a T3 flange?

Why would a different flange (and therefore different exhaust housing) have any bearing on what compressor cover they use?

I have never seen an HKS turbo with an aluminum insert like that before. That looks like a second hand turbo... What proof is there that that's an HKS 2530 and not a modified/high flowed turbo with an HKS exhaust housing? Or an HKS 2530 that got loose, spun out the compressor housing which was then rebuilt with a machined out Garrett compressor housing?

If that's a second hand turbo, and not an HKS 2530 you have bought from HKS, I don't think that's a very good authority on what is and what isn't an HKS turbo dunno.gif

If it *IS* a new HKS 2530, then I don't know what to say because that aluminum insert is something I have NEVER EVER seen from HKS before in my life, and not pictured in ANY HKS goodsmasters, Option mags or HyperREVs and I certainly have never seen one in real life (not that I've seen thousands myself) :confused:

  • Replies 283
  • Created
  • Last Reply

Top Posters In This Topic

On the theme of trying a custom Garrett over an off the shelf HKS I'm trying "one" of these...

This is for use on a R33GTR with 2.8L conversion

Dont know what it will produce yet. Goes on dyno for mapping next week.

Awesome looking turbo there Harry :D

What horsepower rating is it equivalent to in HKS terms? It would be great if you could have a dyno comparison to show spool up characteristics, and top end curve against another 2.8L engine with HKS turbo of equivalent power rating!!

Good luck, I'm sure it'll be a monster to drive :)

Even HKS 2530s I have seen for  S15s have the HKS embossed compressor cover... Do they use a T3 flange?

SR20s like GTRs use a T25 flange.

Why would a different flange (and therefore different exhaust housing) have any bearing on what compressor cover they use?

Perhaps its because if you buy a complete turbo upgrade kit from HKS they are a bolt on proposition, and in the case of GTSt vs SR20/GTRs, they use different plumbing arrangments from the AFM to turbo inlet. So to be a bolt on proposition they use an inlet that is compatible with the std RB20/25 inlet piping resulting in the machined snout.

I dont know for sure about markings, but the HKS 2530 i looked at for my car did have the machined snout bolted to the compressor housing, and was part of the HKS kit with water/oil lines, elbows gaskets etc etc. to plumb up to std Nissan parts.

I dont think generic pictures used in catalogues are all that fool proof either.

Have a look at this turbo off the BD4s website( HKS 25040R), i cant se too may HKS marking on the compressor cover.

Even HKS 2530s I have seen for S15s have the HKS embossed compressor cover... Do they use a T3 flange?

SR20s have a T25 flange. Ah la RB26.

Why would a different flange (and therefore different exhaust housing) have any bearing on what compressor cover they use?

The single bolt-ons for RB20/25's have larger compressor/turbine housings. Maybe they need to flow more considering they are a larger motor?

I have never seen an HKS turbo with an aluminum insert like that before. That looks like a second hand turbo... What proof is there that that's an HKS 2530 and not a modified/high flowed turbo with an HKS exhaust housing? Or an HKS 2530 that got loose, spun out the compressor housing which was then rebuilt with a machined out Garrett compressor housing?

If that's a second hand turbo, and not an HKS 2530 you have bought from HKS, I don't think that's a very good authority on what is and what isn't an HKS turbo dunno.gif

Yes it is a second hand turbo. Yes I have had brand new turbos in the 25xx range bought from a HKS distributor in Japan...and they are the same. JNR32R from these forums bought one - if you are still in doubt ask him. Rick Shaw also bought one for his personal car. MRK25T is another from this forum.

If it *IS* a new HKS 2530, then I don't know what to say because that aluminum insert is something I have NEVER EVER seen from HKS before in my life, and not pictured in ANY HKS goodsmasters, Option mags or HyperREVs and I certainly have never seen one in real life (not that I've seen thousands myself) :confused:

Ask Croydon next time you are there... but I'm not sure if they have dealt with budget single turbos like these. I've got some articles from HyperREVs with pics of these, I'll scan them in later for your amusement. As another point, the new GT-SS and GT-RS just use Garrett compressor + turbine covers. Yes I've had some come through here, I even showed you a set of GT-SS. Are you going to claim they are not HKS turbos now?

I think the bottom line is that because they are not illustrated in the HKS catalogue or on the website and the fact that few people are using them leads to posts like this...

When i was looking for a t3 flange hks 2530 they all had the same front cover as Doughboys.

But ive also noticed that the 2530's etc made really recently have the 2 bolt intake thing on the front covers. I dont know whether this is fact or whether pictures got mixed up etc but yeah..

It is quite an iffy subject and got me quite confused also :rofl:

Very interesting indeed...

Roy's point about bolt-on kits having to have an inlet that is compatible with the std RB20/25 inlet piping resulting in the machined snout is a good one... Makes sense I suppose.

I know, I bought a set of GT-SS and they're sitting right here next to me. There are no HKS markings on it at all, but this discussion was about the 25xx series, not the GT-SS/GT-RS.

Is there that big a difference that HKS is worth $2000+ more?

Has anyone had a Garrett Turbo on, such as a GT3040, and then on the same car swapped it for a HKS GT3040? What was the difference in spool time, power delivery and max power...

I just can't see how there is such a big difference in price! Is it just the name you are paying for?

Any comments would be sweet, especially from those with experience with the two

Cheers,

Andrew

HKS reach the same power level as garretts but at a higher boost level. (Typical japanese)

HKS reach the same power level as garretts but at a higher boost level. (Typical japanese)

Where is your evidence? I would love to see it. I have seen Garrett 'equivelant' turbos that could not hold a candle to HKS. The 2530 is a perfect example, 3040 is another.

And what the hell is the point of remanufacturing a turbo, or redesigning it to achieve what you have outlined.

I really do doubt you have ever had experience with a HKS turbo and a garrett equivelant. It seems to me that statements like yours are brandished around by people that dont know what they are talking about, and dont want to spend a few hundred dollars extra to get a good jap performance turbo, its certainly not 2000 more, unless you buy from the wrong place.

But please, do post up the dynos of these garrett turbos making equivelant power to HKS ones at lower boost, you WILL find that a standard garrett turbo will NOT make anywhere near the same power as a HKS turbo as a rule. They will make similar power at lower boost, but where a HKS turbo comes into its own is

A. it will keep producing power well beyond (revs) where a garrett equivelant will start running out of puff, and

B. it (HKS) will produce alot more power once you start heading above 1.2bar.

The above is generally true also of other big name Jap turbos too - or do you really believe that a garden variety garrett turbo is going to be better than a turbo with millions of dollars in R and D behind it.

Enlighten us all please. And do lets see some dynos to back up what you are saying.

Also, 'typical japanese' - typical japanese take something, then refine it to the point of being almost a work of art. Also, lets not forget who make garrett.

Also, lets not forget who make garrett.

Aren't you forgetting that Garrett make the HKS turbos.

From my experience I have found the HKS equivalent to be a laggier turbo but when the boost rises and higher flow is required the HKS turbo will now be in the meat of its efficiency curve while the standard Garrett equivalent will be past its optimum and starting to become inefficient. The garrett will keep producing boost but with a higher shaft speed and higher temperatures.

The use of the names 2530 etc by HKS is more an indication of external size and flanges than internal parts. Knowing how the Japanese love 'plug & play' or 'bolt-on' options we can see why HKS would use the names of Garrett turbos that can be directly replaced by their own.

Steve, where is your evidence? Why don't you detail the specific examples you mention and provide all the data and I assume the setups were all the same? Tell me about the 3040 example.

Without thorough back to back studies of each we just can't assuem that there is a huge difference between the two.

Why can't you just leave it at the fact that HKS turbos are good and Garrett turbos are good and that HKS turbos are NOT massively better...jeez, what a hard head.

Steve, where is your evidence?  Why don't you detail the specific examples you mention and provide all the data and I assume the setups were all the same?  Tell me about the 3040 example.

Without thorough back to back studies of each we just can't assuem that there is a huge difference between the two.  

Why can't you just leave it at the fact that HKS turbos are good and Garrett turbos are good and that HKS turbos are NOT massively better...jeez, what a hard head.

I see where you are coming from now, what was I thinking, you have convinced me - HKS and garrett are the same!

Why cant I accept it? because I have seen no evidence to that effect. So you believe I should accept it because someone tells me I should - WTF??? I only go off the experience of others that I trust, and have relevant experience, as well as my own experience. Not from staggering intellectual arguements such as the one you posted above.

I dont just believe what someone tells me because they say this is so. I like some evidence first, if that is ok with you? Probably not, probably me just being a hard head.

Example, garrett 3040, with 0.63 turbine housing, 1 bar boost above 4000rpm, hks 3037 with 0.61 housing, 1 bar boost around 3000rpm. 3040 had peak power around 6400rpm, 3037 just kept pulling to redline without a sign of slowing. Very similar setups.

So why cant you accept that HKS turbos arent heaps better than garrett, why is it you insist they are similar? or are you just being a hard head.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Back again. I returned to Japan in Jul/Aug to spend time with the car on my birthday and remind myself what all the sacrifice and compromise is for. It happened to line up with the monthly morning meet in Okutama, which I have been wanting to go to for a long time. It's a unique event at a unique spot with really rare, interesting, and quirky cars. It's where all the oldheads and OGs gather. The nighttime scene at DKF certainly has its place and should be experienced if you're into cars, but there's too much bad attention and negativity around it now. IMO the better time is Sunday morning at DKF or Okutama; it's more chill and relaxed. I'm glad I was finally able to go, but not sure it's worth the drive from all the way from Nagoya immediately the day before, unless I was already staying in Tokyo for the days right before the meet, because you have to wake up quite early to make it in time. Funnily enough though I didn't drive the car all that much this trip because it was just too damn hot. While there were zero issues and running temps were nominal and the A/C was strong, RBs already run crazy hot as it is. Sure, it took it all like a champ but something about driving these cars in the ridiculous heat/humidity bothers me and makes me feel like I'm asking too much of it. I'm just me being weird and treating the car like a living thing with feelings; I'm mechanically sympathetic to a fault. Instead I was mainly driving something else around - a KX4(silver) 2001 X-Trail GT, that I acquired in May. There's a few different flavors to choose from with Xs, but visually it's the Nissan version of the Honda CR-V. Mechanically it's a whole different story as this, being the top-trim GT, has an SR20VET mated to a four-speed auto and full-time AWD! It was a very affordable buy in exceptional condition inside and out, with very low mileage...only 48k kms. Most likely it was owned by an older person who kept it garaged and well-maintained, so I'm really happy with how it all worked out. It literally needs zero attention at the moment, albeit except for some minor visual touch-ups. I wanted something quirky, interesting, and practical and for sure it handily delivers on all three of those aspects. I was immediately able to utilize the cargo and passenger capacity to its full extent. It's a lot of fun to drive and is quite punchy through 1st and 2nd. It's very unassuming -in the twisty bits it's a lot more composed than one would think at a glance- and it'll be even better once I get better tires on it(yes, it's an SUV but still a little boat-y for my liking). So...now I have two golden-era Nissans in silver. One sports car and one that does everything else; the perfect two-car solution I think👍 The rest of the trip...I was able to turn my stressed brain off and enjoy it, although I didn't quite get to do as much as I thought. I did some interesting things, met some interesting people, and happened into some interesting situations however, that's all for another post though only if people really want to know. Project-wise, I went back to Mine's again to discuss more plans and am hoping to wrap that up real soon; keep watching this space if that interests you. Additionally, while working in the tormenting sweatbox that is the warehouse, I was able to organize most of the myriad of parts that my friend is storing for me along with the cars, and the 34 has a nice little spot carved out for it: And since it can get so stupid hot in there, that made it all the more easy -after I was standing there looking at the car and said 'f**k it'- to finally remove all the damn gauges that have mostly been an eyesore all this time. Huzzah. The heat basically makes the adhesive backing on the gauge mounts more pliable to work with, so it was far less stressful getting this done. I didn't fully clean it up or chase the wiring though; that will happen once I have the car in closer possession. Another major reason to remove all that stuff is to give people less reasons to get in my car and steal s**t while it's being exported/imported when/if the time comes, which leads us to my next point... ...and that is even though it's time in Japan is technically almost up since it's a November car and the X would be coming in March, I'm still not entirely sure where my life and career is headed; I don't really know what the future looks like and where I'm going to end up. I feel there's a great deal of uncertainty with me and as a result of that, it feels like I'm at a crossroads moreso now than any point in my life thus far and there are some choices I need to make. Yes, I've had some years to consider things and prepare myself, however too much has happened in that time to maintain confidence and everything feels so up in the air; tenuous one might say. Simply put, there's just too much nonsense going on right now from multiple vectors. Admittedly, I'm struggling to stay in the game and keep my eyes on the prize. So much so in fact, that very recently I came the closest I ever have before to calling it quits outright; selling everything and moving on and not looking back. The astute among you will pick up on key subtext within this paragraph. In the meantime I've still managed to slowly acquire some final bits for the car, but it feels nice knowing there's not much left to get and I'm almost across that finish line; I have almost everything I'll ever want for my interpretation and expression on what it is I think an R34 should be. 'til later.
    • Thanks for that, hadn’t used my brain enough to think about that. 
    • Also playing with fire if they start to flow more air down low than what the stock twins can. It's not even up top you need to worry, it can be at 3000rpm and part throttle and it's getting way more flow than it should.
    • Any G40/1000 or G40/1250 results out there?  
    • You still want a proper tune on the stock ECU though. Stock tune + stock ECU with GT-SS/-9s is probably playing with fire if you're running more than stock airflow/power.
×
×
  • Create New...