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Nismo Rr581 Turbo: When The Boost Come On?

cobrAA

By cobrAA,
in Engines & Forced Induction

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R.3.2.G.T.R Grand Master

R.3.2.G.T.R

Posted
Posted

Alright, ive got a set of Nismo Lemans running on my 32, on my last tune the Lemans turbos made 130rwkw at 4500 rpm (this is when the power starts to come on hard, 130rwkw doesnt sound like much i know but by 6000rpm it makes 280rwkw), But for turbo Lag argument sake we'll start at 4500rpm.

compare that with the GT2530 which correct me if im wrong are just the HKS version of garret -5 and are still a resonably decent turbo. According to this graph i found which is based on engine KW's, the 2530s (-5s) make 200 engine kw, which would be what 150rwkw at most?

Now everyones goin to ask what mods i have and what mods the turbos on the graph have . I would assume that as the 2530s (or -5s) are making 601hp and their max combined output is 640ps, they're pretty much at the limit of what they can do and have the correct supporting mods. (dont forget the lemans are rated to 640ps as well so theres not goin to be any top end lost over the 2530's)

Meanwhile on my Lemans turbo set up, i made that power and ive got only a 3 1/2 exhaust with 3 inch dumps with a rubbish set off front pipes, while still running standard cam gears and cams.

I really dont think the lemans are as rubbish as everyone makes them out to be, a bit laggy yes but still a heap of fun. Im sure someone is goin to try shoot me down but meh

will try and get a before and after graph of when i do have front pipes and cam/cam gears instaled... will be soon :rolleyes:

BTW if u want -5s GCG do them for about 2 grand if i remember correctly.. dunno if they come with actuators though

cheers

for perspective, at 4500rpm my gt-ss is at 235rwkw and 285rwkw at 6000rpm at 17psi

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

bahaha

knew it wouldnt take long for someone to have a chop

A chop? What are you - 15?

Just look @ the results mate. They speak for themselves.

Took me only a couple pages to find some -5s results with RPM (to make it easy)

230rwkw @ 4700rpm

http://www.skylinesaustralia.com/forums/index.php?app=core&module=attach&section=attach&attach_rel_module=post&attach_id=303940

~280-300 @ hubs, 4700rpm.

So take 30kw off if you want, and that’s around 250rwkw (admittadly its got a bit more work the result #1)

http://i36.photobucket.com/albums/e50/sleeprgtr/dyno.jpg

518s = 140rwkw @ 4500rpm as you said.

-5s = 230rwkw @ 4700rpm (easiest to work off the graphs once you look at them you'll see why)

For an extra $1000 you get almost 100rwkw extra @ virtually the same RPM.

Speaks for itself really. The lemans turbos are every bit as bad as people say they are.

GTR_JOEY Grand Master

GTR_JOEY

Posted
Posted

Na sorry mate, bit older then 15

Need to be at least 20 these days to drive a performance car :thumbsup:

you'll actually notice in my first post that i admitted they are a bit laggy, and never tried to say they were better then -5s

Pretty much just posted up some of my own figures with some comparisons

Point is the original thread starter now has a better idea of what turbos he/she wants and why instead of just buying turbos because some bloke behind a keybourd told them to

:cheers:

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Post your dyno sheet in the dyno thread :thumbsup:

Anyways, Thanks, I will go with -5 then.

Pretty sure he had a good idea then.

Although, he actually ended up with Garrett -9s I believe, same as BWRGTR :D

So smaller/more responsive again than the -5s!

STATUS Grand Master

STATUS

Posted
Posted

Alright, ive got a set of Nismo Lemans running on my 32, on my last tune the Lemans turbos made 130rwkw at 4500 rpm (this is when the power starts to come on hard, 130rwkw doesnt sound like much i know but by 6000rpm it makes 280rwkw), But for turbo Lag argument sake we'll start at 4500rpm.

compare that with the GT2530 which correct me if im wrong are just the HKS version of garret -5 and are still a resonably decent turbo. According to this graph i found which is based on engine KW's, the 2530s (-5s) make 200 engine kw, which would be what 150rwkw at most?

Now everyones goin to ask what mods i have and what mods the turbos on the graph have . I would assume that as the 2530s (or -5s) are making 601hp and their max combined output is 640ps, they're pretty much at the limit of what they can do and have the correct supporting mods. (dont forget the lemans are rated to 640ps as well so theres not goin to be any top end lost over the 2530's)

Meanwhile on my Lemans turbo set up, i made that power and ive got only a 3 1/2 exhaust with 3 inch dumps with a rubbish set off front pipes, while still running standard cam gears and cams.

I really dont think the lemans are as rubbish as everyone makes them out to be, a bit laggy yes but still a heap of fun. Im sure someone is goin to try shoot me down but meh

will try and get a before and after graph of when i do have front pipes and cam/cam gears instaled... will be soon :rolleyes:

BTW if u want -5s GCG do them for about 2 grand if i remember correctly.. dunno if they come with actuators though

cheers

i will post back to backs.... the lemans feel terrible on the street and the comparo on the same dyno with the same ramp rate also shows how average they really are. (will post tonight)

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