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Rb25 Turbo Kit Help Making A Decsision.

Irwin123

By Irwin123,
in Engines & Forced Induction

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hypergear Grand Master

hypergear

Posted
Posted

What is transient/part throttle response like though, not everyone spends all day at WOT,

I would bet my left nut the 2835 poo's all over the Hypergear stuff at normal street loads and rpm

So you mean cars with result that made less power on WOT all over the rev range should drive heaps better on street load? If that is the case then no one would be dumping money in R&D for better response and power delivery.

I can take you for a test drive if you are in Melbourne.

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Harey Veteran

Harey

Posted
Posted

I appears the Joey, myself and others that are running the 2835 seem to be getting ~280 @ about 18-20psi (just generalizing/average) where the HG units seem to need 20-22 to get those figures.

Cough Cough Trent showed me Joeyjoey's dyno using the same correction factor that he uses for Tao's dynos and it made 268rwkw. It only makes 280rwkw when you change the correction factor...

Plus Joeys result is full boost at 3500rpm, not 3200rpm like your dyno shows Dave.

When using the exact same dyno the SS1 on my car made 244rwkw and 20psi by 3200rpm. The SS1PU fits very closely to the SS1PU ~270kw and 3500rpm full boost and the SS2 very closely to the 3076 280-300rwkw and 3800rpm full boost.

Harey Veteran

Harey

Posted
Posted

huh???? are you saying my tuner is falsifying my dyno readouts as well...??? wtf

Hmmm cant remember saying that. Your setup has a few more mods too RIPS aftermarket plenum and ARC super induction box.

DVS JEZ Grand Master

DVS JEZ

Posted
Posted

Midread sorry. So why does he change correction factors?

All on same dyno same correction etc

2835 made 277kw full boost 3200

Ss2 made 244kw 19psi

Ss1.5 made 259 19psi but didnt back it up. Ran 246 next

Atr43g3 made 232 kw 19psi maxed stock injectors at 6000rpm. This one feels strong as now with bigger injectors only road tuned but. Very curious to see what it makes

Harey Veteran

Harey

Posted
Posted

enough talk, overlay the dyno plots.... lets see which has more under the curve...

and not using some demo car thats been tweaked to get a curve.

Sounds good but back to back on the same dyno using the same correction factor etc.

zebra Grand Master

zebra

Posted
Posted

So you mean cars with result that made less power on WOT all over the rev range should drive heaps better on street load? If that is the case then no one would be dumping money in R&D for better response and power delivery.

I can take you for a test drive if you are in Melbourne.

NO!

I am saying that WOT means very little on a street car,

a car that can make +ve inlet pressure at 20% throttle and 3000rpm is better than a car that needs 50% throttle to make +ve inlet pressure at 3000rpm etc

Harey Veteran

Harey

Posted
Posted

Midread sorry. So why does he change correction factors?

All on same dyno same correction etc

2835 made 277kw full boost 3200

Ss2 made 244kw 19psi

Ss1.5 made 259 19psi but didnt back it up. Ran 246 next

Atr43g3 made 232 kw 19psi maxed stock injectors at 6000rpm. This one feels strong as now with bigger injectors only road tuned but. Very curious to see what it makes

Well clearly the 3 Hypergear turbos have other issues that are holding the turbo back.

Dave's setup is pretty damn awesome, lots of additional parts and effort have gone into that car. Engine bay looks unreal.

Dont think its comparing apples with apples.

You have tuned 3 Hypergear turbos and Trent would have tuned 50+.

Harey Veteran

Harey

Posted
Posted

NO!

I am saying that WOT means very little on a street car,

a car that can make +ve inlet pressure at 20% throttle and 3000rpm is better than a car that needs 50% throttle to make +ve inlet pressure at 3000rpm etc

Which we dont have any measurements on so basically you are just guessing.

DVS JEZ Grand Master

DVS JEZ

Posted
Posted

Well clearly the 3 Hypergear turbos have other issues that are holding the turbo back.

Dave's setup is pretty damn awesome, lots of additional parts and effort have gone into that car. Engine bay looks unreal.

Dont think its comparing apples with apples.

You have tuned 3 Hypergear turbos and Trent would have tuned 50+.

That is correct no doubt, it may just be the difference between dyno's but we cant back the numbers up thats all. The ss1.5 i installed and made sure everything was done correctly including the 3inch intake etc. Its nice to drive sounds wicked but just didnt quite have the top end he was hoping for.

DaveO74 Mentor

DaveO74

Posted
Posted

I new it wouldn't take long for you to call bullsh1t Harey, my post in which you quoted says that the HG seems to need a little more boost to make the same figures that is all.

Personally I couldnt care less anymore if you think all of us "2835 fanboys" as you have called us before just like to get our tuners to play around with ramp rates blah blah blah so we can show a dyno graph that is more impressive than yours. That's just absurd.

You seem to be o e of the biggest HKS/Garrett haters on these forums.

Fact: the HG turbos are great bang for buck and stoa does great work.

Fact 2: hks turbos are also a great turbo but you pay for it

Fact 3: if you were to have some kind of race with bolting up the HG compared to the hks I can promise you the hks will be on and strapped up on the rollers while you are still working out what to do with you water lines and wondering why the dump is fouling on the air con drain.

Sorry man but this is just how it is, not trying to start a war.

75coupe Grand Master

75coupe

Posted
Posted

Hmmm cant remember saying that. Your setup has a few more mods too RIPS aftermarket plenum and ARC super induction box.

Hang on a sec, your saying a front facing plenum and an aftermarket air intake is maybe allowing me to make more power... huh

there are heaps of thread on SAU saying these mods make no more power... so which is it???

Harey Veteran

Harey

Posted
Posted

Im not saying bullsh!t, I think they are fantastic turbo. I am just showing the other side and I dont think the difference is quite what a few of you make it out to be.

Fact 4 you will have to work for another month to pay off the additional hks pricetag :)

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