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Nismo Rr581 Turbo: When The Boost Come On?

cobrAA

By cobrAA,
in Engines & Forced Induction

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cobrAA Mentor

cobrAA

Posted
Posted

Hey guys,

I've searched a lot but couldn't find the answer to my question.. I can get the RR581 for cheaper than a set of garrett -7. So I was wondering if those Lemans turbo are responsive like the -7 or more laggy like the -5.

So, when does the boost come on on the RR581 ? I have a stock internal R32 with R34 dump pipe and divided twin turbo charge pipe (help spool a tad quicker..).

Thanks!!

Duncan Grand Master

Duncan

Posted
Posted

I can't comment on the r581 turbs....but the 32 n1 turbos which I understand are essentially the same spec, come on about 4,500 and make power to about 20psi. ie they are utter rubbish compared to any modern ball bearing turbo. Literally 50+kw less at 1000rpm higher.

cobrAA Mentor

cobrAA

Posted
  • Author
Posted
I can't comment on the r581 turbs....but the 32 n1 turbos which I understand are essentially the same spec, come on about 4,500 and make power to about 20psi. ie they are utter rubbish compared to any modern ball bearing turbo. Literally 50+kw less at 1000rpm higher.

ball bearing is better and easier to rebuilt than journal 360 bearing right?

Duncan Grand Master

Duncan

Posted
Posted

don't know about easier. bush bearings are cheaper for sure. but 32 n1 runs 270o bush bearing not 360o, not exactly ideal.

ball bearing should cause less drag, faster spool and more power for the same size wheels...

Deano 1 Mentor

Deano 1

Posted
Posted

yer ive got 32 N1 on my car, make power too 20psi as duncan said, but dont see full boost to 4.5-4.8k, they are majorly out dated so many better turbos out there these days, If you goin from 32 N1's to -5's you prob wont even notice the lag diffrence, but u deff will be able to make a heap more power. My car will be getting -5's when the engine comes out....

  • 7 months later...
krayzie32 Mentor

krayzie32

Posted
Posted

Sorry to dig up old thread, but need to be sure before i make a rushed purchase...

The turbos in question are these follow the link

http://www.skylinesaustralia.com/forums/Ni...ac-t343928.html

but have been advised that turbos are actually 32Nismo (14411-06U00) T04B T3 44.6 - 60.1 62T 0.42 T25 T25 41.7 - 53.0 CD79 0.64 15° 270° ~600PS

but have been rebuilt to the following spec... With photos to back it up...

Nismo GT/le mans (14411-RS581) T04B T3 55T 0.6 T25 T25 CD79 0.64 15° 360° ~640PS

BNR32 & R33 (14411-24U00) T3 T3 42.5 - 60.1 50T 0.42 T25 T25 41.5 - 50.5 62T 0.48 270° Ceramic

~450PS

32Nismo (14411-06U00) T04B T3 44.6 - 60.1 62T 0.42 T25 T25 41.7 - 53.0 CD79 0.64 15° 270° ~600PS

33N1 (14411-24U10) T3 T3 44.5 - 60.1 55T 0.42 T25 T25 41.7 - 53.0 CD79 0.64 360° ~560PS

BNR34 (14411-AA300) GT22

(T3?) C100 39.6 - 56.0 50T 0.53 T25 GT25 41.7 - 50.4 68T 0.48 BB Ceramic

~450PS

34N1 (14411-AA401) T3 C106 44.5 - 60.0 55T 0.6 T25 GT25 42.4 - 53.8 62T 0.64 BB ~500PS

34N1 (14411-AA402) T3 C106 44.5 - 60.0 55T 0.6 T25 GT25 42.4 - 53.8 62T 0.64 BB ~500PS

34N1 (14411-AA403) GT22 C106 44.5 - 60.0 55T 0.42 T25 GT25 42.4 - 53.8 62T 0.64 BB ~500PS

Garrett 707160-7 GT25 GT25 44.5 - 60.0 55T 0.42 GT25 GT25 42.4 - 53.8 62T 0.64 BB ~500PS

Garrett 707160-9 GT25 GT25 44.46 - 59.41 56T 0.42 GT25 GT25 42.4 - 53.85 62T 0.64 BB ~560PS

Garrett 707160-5 GT25 GT25 47.2 - 60.0 62T 0.6 GT25 GT25 47 - 53.8 76T 0.64 BB ~640PS

Garrett 707160-10 GT25 GT25 51.2 - 71.0 52T 0.6 GT25 GT25 47.0 - 53.8 76T 0.64 BB ~800PS

HKS GT2510 T04B T03 47.7 - 60.1 63T 0.6 T3 GT25 41.7 - 53 62T 0.64 BB ~600PS

HKS GT2530 T04B T03 47.7 - 60.1 63T 0.6 T3 GT25 47.0 - 53.8 76T 0.64 BB ~640PS

HKS GT2540 T04B T04E 51.7 - 76.2 46T 0.6 T3 GT25 47.0 - 53.8 76T 0.64 BB ~700PS

HKS GT2835 49.3 - 71.1 48T 0.5 GT28 51.8 - 56.5 84T 0.64 BB ~760PS

HKS GT-SS T04B GT25 44.46 - 59.41 56T 0.42 T25 GT25 42.4 - 53.85? 62T 0.64 BB ~560PS

HKS GT-RS T04E? GT25 51.2 - 71.1 52T 0.6 T25 GT25 47.0 - 53.8 76T 0.64 BB ~800PS

Nismo 260RS (14411-RR595) T3 T3 44.5 55T 0.42 T25 T25 41.7 CD79 0.64 360° ~560PS

Nismo for street (14411-RS580) T04B T3 62T 0.42 T25 T25 CD79 0.64 7° 360° ~560PS

Nismo GT/le mans (14411-RS581) T04B T3 55T 0.6 T25 T25 CD79 0.64 15° 360° ~640PS

Nismo R1 (1441A-RSR45) T3 T3 55T 0.42 T25 GT25 62T 0.64 BB ~560PS

Tomei B7655 (173011) 47.7 55T 0.42 T25 T25 47.0 76T 0.64 BB ~500PS

Tomei B7660 (173012) 47.7 60T 0.42 T25 T25 47.0 76T 0.64 BB ~600PS

Tomei B9046 (173013) 51.7 46T 0.42 T25 T25 53.6 90T 0.64 BB ~700PS

few Specs there obviously real world results are different

just need someome to tell me wether i should get the Nismo Le Mans or Not, Have all thw supporting Mods bar Forged Motor...

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

-5 all the way.

380-400 on a good motor. newer design than the old le mans stuff and more responsive for the power as a result.

but as you don't have a built motor, they are not the best choice.

the -9 would be and are not going past the limits of a stock motor.

to make the most of -5's you really do need a built motor, bit of a head tidy up and so on.

krayzie32 Mentor

krayzie32

Posted
Posted

Thanks for replies...

Well looking at above because

purchase price includes turbos, new gasket set, bigger dumps & front, also standard manifolds cleaned up with braided oil & water lines

and as building the motor is eventual goal, i will be looking at utilising the standard motor for putting around duties while looking into rips 30 motor...

Also will be doing turbo replacement myself

so all in all will save quite abit of money, rather than pytting out $2300 for -7s pls extra for lines & gasket kit & bigger dumps front

so to put all that into perspective

How should i approach this...

What would the response be like and how noticeable compared to stock 32gtr turbos

which atm is blown...

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

-9 are as close to stock as you can get

with -5 there is certainly a noticeable

the le mans would be laggier again realistically as they are old hat now.

so it comes down to how much you wanna spend vs what you are willing to live with if you wanna save 'x' amount.

the garrett value for money is hard to argue for either turbo choice given the results people get.

DVS JEZ Grand Master

DVS JEZ

Posted
Posted

If ur stock turbo's are blown, didte exhaust wheel shatter?

I hate to be the bearer of bad news but its possible that ur motor has shrapnel in it now and will be next to die soon after.

  • 4 weeks later...
GTR_JOEY Grand Master

GTR_JOEY

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

GT series chart.zip

R31Nismoid Grand Master

R31Nismoid

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

why don't youjust look at the dyno results thread?

it will soon show you that -5s are more responsive than 581/lemans, and make more power.

The real crux of the issue is not what happens on a dyno either. It's when you are on the street.

in-between gear changes and so on. newer turbos with ball bearing centers, newer/lighter wheels will flick back up on boost faster.

Something you'll never really be able to tell from a dyno sheet.

People only think 1980s designed turbos are good because they've never had newer tech ones and simply have not seen it for themselves.

Justify it however you want, fact is the lemans turbos in this day and age, are rubbish

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