single or twin turbo for RB26

[R32-GTS]

yeah was a nice run on SLICKS but the other two big singles i've seen have battled to say the least to get them off the line(no low down grunt or torque or rapid spool up in these examples) And one of the guys actual said he would have trade the power delivery of his single for what we were getting out of the small garret in and instant and as for see at the plex, yeah right i'll grow old and retirer before you put car where your mouth is?

I'm quite sure from what i saw it was on street tyres . And as for getting off the line and rapid spool i've seen yours bog off the line quite a number of times.

[R32-GTS]

And the other big single turbo car you are talking about has a turbo 3 times the size of yours put together. We are talking properly matched singles here. ie.. gt35's , t60-1 etc etc

Sus the dyno graph. Not bad for a shitty single. As for that other dyno graph on the twins. Funny how its getting shown starting at 115kms. Nice way to show a big average power graph.

[R31Nismoid]

AND has a set of low-mount twins!!!

Try getting a power curve like that with a single!!!!

any reason why you didnt do it in shoot_6 mode instead of shoot_8

last time i checked an RB26 came with only 6 pistons

[R32-GTS]

I noticed that as well.

[180bfj20det]

I have covered this before. A properly matched single BB turbocharger will always outperform any twin turbo variants of similar calibre both in response and outright power. You cant go against physics. There is a GTR with only a GT30 which makes +300rwkW and does a high 10 with better drivavbilty than nismo N1s by far. Please the person who owns this car speak out and pass on your experience of this brilliant car.

30 years ago yeah twin turbos were the go... not anymore.

[Guest]

AND has a set of low-mount twins!!!

Try getting a power curve like that with a single!!!!

hi

What turbos and boost are you running?

Is the bottom end still 2.6litre? can u tell me what other mods you have done?

thanks

[R31Nismoid]

the car is running 2530's, still a 2.6ltr

[Mik]

I have covered this before. A properly matched single BB turbocharger will always outperform any twin turbo variants of similar calibre both in response and outright power. You cant go against physics. There is a GTR with only a GT30 which makes +300rwkW and does a high 10 with better drivavbilty than nismo N1s by far. Please the person who owns this car speak out and pass on your experience of this brilliant car.

30 years ago yeah twin turbos were the go... not anymore.

What are you talking about? The fluid dynamics behind it all say that one turbo per cylinder is the ideal.

[pnblight]

What are you talking about? The fluid dynamics behind it all say that one turbo per cylinder is the ideal.

Mik i got to agree with you from all the published documentation i have read multi turbo configurationhas been known to have a clear efficience edge over a single arrangement( due to in one part the clear exhaust signal)

And people just for a moment think about ever top of the range turbo charged performance car on the market i can think of nissan ,toyota, porsche are all multi turbo , And your trying to tell me they spend million of dollars on development to built some of the fast cars on the planet to built multi turbo cars ,to have only gone backward from the base model unit (ie gts to gtr)I DONE THINK SO.

ok the fast gtrs in world hks/veilside/gtr700/Keir wilson etc etc all twin

the best track gtrs in the world (other end of the scale "responce") all twins never seen the nissan racing team run a single turbo set up I WOUNDER WHY NOT , if what you say is true that single is best why would a team with hugh money resource and R&D backing not have gone to that configuration for an edge ,BECAUSE IT ISN'T.

[slow13dude]

30 years ago yeah twin turbos were the go... not anymore.

Poor Nissan, spending all that money on the RB26DETT when they could have listened to you and just stuck with the single turbo setup!

And the R32 GTR came out in 1989, which is only 15 years ago.

:bs!:

And clearly BMW engineers have no f*cking idea because they are developing a twin-turbo inline-6 setup:

BMW Twin turbo

[Butters]

Spend some time here

--> http://dyno.to4r.com/graph.php

Think you will find in most case's the twin turbo's get humped like little pooch's by late model BB singles.

[Butters]

The best example I think is the

GT42R single making 1131 hp vs 2 x 3240's making 1073 hp

The 3240's are on a 3.4 litre engine, vs a 3litre engine.

And I am afraid the single turbo making more power on the samller engine comes on harder

[slow13dude]

The best example I think is the

GT42R single making 1131 hp vs 2 x 3240's making 1073 hp  

The 3240's are on a 3.4 litre engine, vs a 3litre engine.  

And I am afraid the single turbo making more power on the samller engine comes on harder

I'm not calling you a liar, however you haven't explained why the engineers persist with the twin-turbo setup if it's a waste of time.

[Butters]

I'm not calling you a liar, however you haven't explained why the engineers persist with the twin-turbo setup if it's a waste of time.

There is one point we all miss here. We all are assuming manufactors make cars to be there best / fastest / most effecient.

Manufacturers dont make the best car the possibly can, they make cars that SELL and make money ......

Doesn't TWIN Turbo sound cool to the marketing department ?

Above that I dont truly know the answer to which is better. I just thought it nice to show some real world examples up for thought

[Jago]

A single turbo will almost always spool faster than a set of twins if it is matched correctly.

uuuuhhhmmmm?

[pnblight]

I'm not calling you a liar, however you haven't explained why the engineers persist with the twin-turbo setup if it's a waste of time.

Yeah its not just not the engineers but also the company like HKS,TOMEI and APEXI top performance gtr's are twins aswell and if your going to talk hp what about Veilside 1400hp plus 2.6Litre gtrs on twin turbos but obvisiously these companys need to come listen to the aussie back yard experts cos there got it all wrong.

I surgest a few guy could benefit from reading a book by Gramham Bell called Forced Induction. It based on facts and on cars developed in F1 and WRC and the principles that have been developed in all areas of forced induction.

[R32-GTS]

Watch a few early HPI dvd's and see what sorta times the big singles are running on the gtr's . Yes the huge horsepower GTR's are running twins but thats due more to the fact that u cant get a single big enough to get the horsepower they want. Were talking street cars here not all out drag cars.

[LTSJayce]

AND has a set of low-mount twins!!!

Try getting a power curve like that with a single!!!!

:werd: ...and this ,ladies and gentlemen,is why I'm going HKS 2530's!

[Guest two.06l]

any reason why you didnt do it in shoot_6 mode instead of shoot_8

last time i checked an RB26 came with only 6 pistons

Did you care to notice the signature on the graph...it was in competition, so the run was performed under competition rules (not mine) Also there is not enough loading on the dyno in shoot6 for high powered vehicles...i.e. too much wheelspin in shoot6...all dyno comps use shoot8...i.e. everybody has the same dyno loading.

[R32-GTS]

OK so hang on is that 466 rwkw's ?? If so then your making 624rwhp. Now. Someone please explain how you get that sort of horsepower out of 2530's when even 2540's would struggle to get anywhere near that.