Rb25 Turbo Upgrade.

[dangerman4]

So Lee and Adrian which turbo would be better suited to drag racing?

with some MT streets etc and a pulp tune?

with mt streets and a e85 tune?

with good street rubber?

u guys both have strong r33 gtst's so in your personal opinions?

[(OO)Firty Free(OO)]

So Lee and Adrian which turbo would be better suited to drag racing?

with some MT streets etc and a pulp tune?

with mt streets and a e85 tune?

with good street rubber?

u guys both have strong r33 gtst's so in your personal opinions?

Lets just say i'm more than happy with the midrange/top end of the HKS3037.

Gotta compare apples with apples, i'm still running standard manifolds (which lets face it would be pretty much at their limits) and Adrians has a Plazmaman intake and etm high mount.

If i was a betting man i would put my money on Adrians in a Drag race with the extra top end.

100kph roll on in fourth i think would net a different result. Different animals but both lots of fun

[180or200]

So Lee and Adrian which turbo would be better suited to drag racing?

with some MT streets etc and a pulp tune?

with mt streets and a e85 tune?

with good street rubber?

u guys both have strong r33 gtst's so in your personal opinions?

Good times tend to rely on mph so I think the bigger of the 2 turbos will win in most of the above cases!

E85 allows the 3037 to punch well above it's weight, so the midrange is very similar, I think the 25 head has reached it's flow limit so without cams and head work it's hard to say if the 3582 has reached it's full potential!

If both were tuned on ulp I think the gap would be alot wider in the 35's favour,

I would love to try both setups on the same car oneday.

[SDEWY5]

i run a low mount GT35, 16psi makes 270kw n i fkn love it, turbo hits that hard when it comes on, if u want something that excites u id go for the 35. Im not knocking the brilliant powercurves that alot of the people have with smaller turbos but i think at the end of the day i feel my car is a bit more exciting to drive with the 35 than say a 30. Personal preference of course.

[(OO)Firty Free(OO)]

If both were tuned on ulp I think the gap would be alot wider in the 35's favour,

I would love to try both setups on the same car oneday.

Agree with the ULP comment but reckon the E85 masks the size of the 3582 on a 2.5ltr. Should tune for PULP for fun one day and see how the car responds.

Another guy i know with 3540 running PULP on a 25 is quite laggy but hey his tune might not be optimum.

Years ago when i was playing with V8's (ally headed clevo's mainly) my main aim was always averages not peak power and thats where i think the 3037 is the right choice for a 25.....Throw a 25/30 into the mix then its a different story 3582 would be a better choice for sure again my opinion only.

Trying turbo's on same car wouldn't net much difference imo, the engines both done similar work.

Either way they are both weapons.

[Lithium]

So Lee and Adrian which turbo would be better suited to drag racing?

with some MT streets etc and a pulp tune?

with mt streets and a e85 tune?

with good street rubber?

u guys both have strong r33 gtst's so in your personal opinions?

A GT3582R is clearly capable of more power, but the guy was saying he is going to run 1bar-1.3bar on a standard motor - ie, where you won't see the advantages of the bigger turbo. If we were talking a built motor with 1.4+bar then I would be voting the GT3582R without hesitation.

[dangerman4]

both Lee's and Adrian's motors are stock. thats why i thought it was a good comparison.

and u have to remember as well there talking a hks 3037 not a garret 3076

[3BEPKA]

I run high mount GT3582 build motor 422hp@19psi on 98 RON and it's lot of fun

[Lithium]

both Lee's and Adrian's motors are stock. thats why i thought it was a good comparison. and u have to remember as well there talking a hks 3037 not a garret 3076

HKS 3037 IS a Garrett GT3076R. Garrett sell the GT3076R with no turbine housing, suppliers/aftermarket outfits sort one out to their disgression. HKS do so by buying it, putting on their own .68a/r turbine housing (my Garrett has the .82a/r which has virtually imperceptible amounts more lag and flows more) and a cute little bellmouth on the intake which covers up the surge slots which some people find a put off. Oh yeah, and the HKS badge.

The 52T GT3037 is a bit different but no one really uses them on RB25s, they're more suited to smaller motors and don't flow as well.

[(OO)Firty Free(OO)]

Taken from Nengun.

The HKS GT Series Turbos are based on ball-bearing Garrett units and like the HKS Signature Series have re-engineered compressor and turbine wheels along with specific A/R and trim levels.

HKS carefully tested Trim and A/R levels along with different inlet and outlet diameters to achieve optimal power

As you can see they are quite a bit different to the Garrett 3076. HKS have built the turbo around the engine so to speak. Garrett have everyone in mind with their turbo housings/wheels etc. I think thats what Dangerman was referring to.

[Lithium]

As you can see they are quite a bit different to the Garrett 3076. HKS have built the turbo around the engine so to speak. Garrett have everyone in mind with their turbo housings/wheels etc. I think thats what Dangerman was referring to.

Yeah, but a 56T HKS GT3037 (ie, your turbo) being "based" on a Garrett turbo is that they have got a GT3076R CHRA and put an HKS turbine housing on it. TBH being the same core I don't differentiate it. Either way its better for a basic stock internal RB25 which someone is going to push 1.3bar boost MAX into.

[(OO)Firty Free(OO)]

Yeah, but a 56T HKS GT3037 (ie, your turbo) being "based" on a Garrett turbo is that they have got a GT3076R CHRA and put an HKS turbine housing on it. TBH being the same core I don't differentiate it. Either way its better for a basic stock internal RB25 which someone is going to push 1.3bar boost MAX into.

re-engineered compressor and turbine wheels.

You missed that bit^^^^^^^^^^^^^

Whats 1.3 bar around 20psi? Like to know why you think thats the max cause mine loves 23psi and some. Maybe your talking a PULP tune not E85.

[R31Nismoid]

Have you actually measured the wheels to confirm this?

IMO its marketing hype at its finest. The differences, if any, are minimal

[Bliksem]

I run high mount GT3582 build motor 422hp@19psi on 98 RON and it's lot of fun

Interested to know, is that with Cams?

[(OO)Firty Free(OO)]

Have you actually measured the wheels to confirm this?

IMO its marketing hype at its finest. The differences, if any, are minimal

I'm not that interested that i'm going to measure wheels etc, just seems (to me anyway) that guys with 3076 Garretts flip off HKS3037's as being nothing more than a pretty comp cover. I believe otherwise which is why i purposefully went down the HKS path to the detriment of my hip pocket........(350rwkw on E85 with standard manifolds seems to reflect my thoughts also). Again these are only my opinions read into them what you will.

[Lithium]

re-engineered compressor and turbine wheels.

You missed that bit^^^^^^^^^^^^^

No I didn't. This is really beyond the scope of this thread, believe what you want really. I'd love to know what people who think the HKS GT3037 uses different wheels think of the fact that you can fit an HKS turbine or compressor housing onto a Garrett GT3076R with absolutely no modification and the wheels fit perfectly. Having all exactly the same measurement it makes it seem like the same wheels. For rofls if you ever have you turbo off, you should google the CHRA tag on the turbo and see what you get. I've done it with an "HKS" turbo before with much amusement.

FWIW, my turbo even had "GT3037-56T" on the core.

Whats 1.3 bar around 20psi? Like to know why you think thats the max cause mine loves 23psi and some. Maybe your talking a PULP tune not E85.

1.3 bar is less than 20psi, its the boost level the guy who made the post said he was looking at running a maximum of. You are quite right, the GT30R will not be maxed out at that level - which is why I am saying there is no point going bigger if the GT30R is more than capable of it.

Seeing as you mentioned PULP at all, here is a dyno overlay of a .82a/r GT3076R and a .82a/r GT3582R both running 32psi on a fully worked Honda B18C (car that I believe touched single digits down the 1/4) on C16:

Edited April 16, 2009 by Lithium

[R31Nismoid]

I'm not that interested that i'm going to measure wheels etc, just seems (to me anyway) that guys with 3076 Garretts flip off HKS3037's as being nothing more than a pretty comp cover. I believe otherwise which is why i purposefully went down the HKS path to the detriment of my hip pocket........(350rwkw on E85 with standard manifolds seems to reflect my thoughts also). Again these are only my opinions read into them what you will.

You'd hope with a HKS3037/GT3076 would do 350 on E85 considering they are 300rwkw on PULP

[Pattygtst]

id feel the same way if i spent a couple extra grand on a hks rather then a garrett for basically the same thing

[(OO)Firty Free(OO)]

id feel the same way if i spent a couple extra grand on a hks rather then a garrett for basically the same thing

Some people just know everything don't they^^^^^^^^^^^^^^

I actually only paid 3K for the complete HKS set up, cant see ya getting a complete Garrett turbo, Dump pipe, turbo to AFM pipe etc etc etc for 1K unless you know something i dont. Oh BTW internally gated 3076's that i know of have trouble with spike if you dont relieve the gate (more money) something i didn't have to worry about.

[180or200]

You'd hope with a HKS3037/GT3076 would do 350 on E85 considering they are 300rwkw on PULP

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

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