Turbo Ratings. Wtf!!

[Nacho Vidal]

Can someone settle this?

Say for example an HKS GT2530 turbo. HKS themselves rate this as a 300hp turbo, yet these turbos (singly on a RB25) can make at least 225kw(300hp) AT THE WHEELS, which means the engine is making closer to the 400hp mark.

Also i read somewhere on the forums someone SWEARING that a std RB25 turbo will not, and cannot make more than 300hp. Well this obviously cant be true, as heaps of people with std turbos -including myself-are putting out just over 200kw at the wheels at 12-14psi with tuning, which is somewhere around 350-380hp at the engine.

Cheers, NACHO.

[meggala]

hey nacho not all dynos read the same hence the descrepancies

with the hks turbo's they guarantee 300 ps but I think you will find its actually around 350 for the hks2530 that they guarantee

which means they will actually do more

meggala

[Sydneykid]

Hi Nacho Vidal, it's all in the numbers..........

200 rwkw is 250 kw (at the engine)

250 kw is 340 bhp

That's on our dynos (engine and chassis) it might be different on someone elses.

HKS rating for their turbos is always at least 10% conservative, they sell lots of stuff in the US and they don't want to get sued.

I have seen a R33 GTST RB25DET with the standard turbo make 220 rwkw (that's 370 bhp) at 1.4 bar (lots of other mods). So I know an R33 GTST RB25DET standard turbo can make more than 300 bhp. By the way it lasted 3 days until the ceramic turbine parted company with the shaft. The 200 rwkw we talk about is the "safe" limit of the turbo, not the "it won't last" limit.

Hope that helps.

[Steve]

Pretty sure that the hp ratings, whilst being conservative, are at 1bar as well. From all that I have read, hks turbos work most efficiently at around 1.5 bar, so you would get some exta there too.

[Nacho Vidal]

thanks guys, yeah it would make sense if the rating is for 1bar.

A mate is about to fit a 2530 to his 32gtst. Once its tuned ill post some numbers, should be interesting.