Jump to content
SAU Community

Stock To 1bar Boost

R32Ninja

By R32Ninja,
in Engines & Forced Induction

 Share

Recommended Posts

123456 Proficient

123456

Posted
Posted

nah, 1 bar is bordering on the turbo's max efficiency, some people report a performance drop even, from 12 psi. Anyway, 14 psi (1 bar) is too high for the standard turbo and it wont last long, try out 12 psi (.83 bar i think) it'll still feel quite a bit faster than stock

R32Ninja Explorer

R32Ninja

Posted
  • Author
Posted

yea, I was thinking of just keeping it around stock for everyday driving, then just changing it before I really wanna push it. pushing a bar for a few hours everyweek shouldn't be that bad?

p.s.

is there a noticeable gas mileage difference also? forgot to ask that one before

AndrewD Contributor

AndrewD

Posted
Posted
it is noticeable different.

But your playing with fire IMO.

Stick to 12psi. With a good tune, and a set of cam gears... you wont know the car it'll be much nicer to drive

What is with you and cam gears. They do squat! Changing to slotted cam gears isnt of much benefit unless you can verify either retarding or advancing the cam is adventageous.

And your avatar. It merits ridicule.

The Dan Grand Master

The Dan

Posted
Posted

Has anyone got a compressor map for the stock turbo?

Does anyone actually have any idea or are we all just talking shit about what the guy next to us has said?

The GTR runs half total boost on each turbo. So by my calculations, that would mean the stock turbos WILL blow up if they run more than 7.5psi each. Holy shit, and here I was thinking that 10-12psi each was more of a realistic maximum for each one.

The Dan Grand Master

The Dan

Posted
Posted
What is with you and cam gears. They do squat! Changing to slotted cam gears isnt of much benefit unless you can verify either retarding or advancing the cam is adventageous.

And your avatar. It merits ridicule.

I second that notion. He advised a customer of mine to not worry about cams and just put the gears on. Makes the same power it did before. Drives exactly the same after the tune. Definately looks prettier though.

MBS206 Grand Master

MBS206

Posted
Posted
Has anyone got a compressor map for the stock turbo?

Does anyone actually have any idea or are we all just talking shit about what the guy next to us has said?

The GTR runs half total boost on each turbo. So by my calculations, that would mean the stock turbos WILL blow up if they run more than 7.5psi each. Holy shit, and here I was thinking that 10-12psi each was more of a realistic maximum for each one.

I'm glad I cleared that one up then.

Um, if you run a single turbo system at 14PSi, the turbo sees 14PSi.

If you run a twin turbo system at 14PSi, each turbo STILL sees 14PSi... You don't halve it.

What gets halved, is the CFM through each turbo. Two TOTALLY different things.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

The are a great RB26 mod, thats whats with it

One of the best value for money mods, cheap as chips and can return upto 25rwkw in the midrange.

So i'd say thats pretty adventageous, wouldnt you?

If you dont get a gain, so be it, lots of people have. For $150... well... hard not to try it.

The Dan Grand Master

The Dan

Posted
Posted
Um, if you run a single turbo system at 14PSi, the turbo sees 14PSi.

If you run a twin turbo system at 14PSi, each turbo STILL sees 14PSi... You don't halve it.

What gets halved, is the CFM through each turbo. Two TOTALLY different things.

The stock actuators open at 4psi. Yes....halve it.

And at any rate, 14psi is not going to kill a pair of GTR turbos. Sure it may have screwed a few in history but that doesn't mean it was caused by running that much boost.

AndrewD Contributor

AndrewD

Posted
Posted
The are a great RB26 mod, thats whats with it

One of the best value for money mods, cheap as chips and can return upto 25rwkw in the midrange.

So i'd say thats pretty adventageous, wouldnt you?

If you dont get a gain, so be it, lots of people have. For $150... well... hard not to try it.

I cant see how just 'replacing' the cam gears is going to net you gains. 25 kw gains at that.

Please elaborate more. Are you talking about a direct swap, or adjustable 'slotted' cam gears you can adjust valve events start / end timing with?

AndrewD Contributor

AndrewD

Posted
Posted
The stock actuators open at 4psi. Yes....halve it.

And at any rate, 14psi is not going to kill a pair of GTR turbos. Sure it may have screwed a few in history but that doesn't mean it was caused by running that much boost.

Nah mate, the other dude is right, however its actually about mass flowrate not volumetric flowrate (CFM) as that implies that temperature effects are negligble. i.e. you could one volumetric flowrate but different mass flowrates for varying temperatures.

So two turbos running at 9 psi nets 9 psi MAP but twice the massflowrate than one would at the same boost pressure.

But i agree with you nismoid should really stop giving out crap advice, but hes victorian, the home of material boys. Im guessing he gets a commission for selling as many cam gears as possible. That or dreams of them

MBS206 Grand Master

MBS206

Posted
Posted

The only evidence, I've been told of, for not wanting to run over 12PSi on a 'Line turbo, is the ceramic wheel.

Do the GTR still run ceramic wheels on there turbos?

The best way to decide on your boost level, is on the dyno, you can see what increase you get, and usually people dial in the most boost they can, before power doesn't seem to increase... Unless of course the turbo is likely to fail (From delamination etc)

Beer Baron Grand Master

Beer Baron

Posted
Posted

i have to say I dont buy the 14psi=blown turbo myth. Providing you keep exhaust temp under control, the car is tuned well and things are generally in good condition 14psi should be fine for a squirt every now and then.

as for the cam gears. andrewd, he's talking about adjustable cam gears. i can't say i've ever seen replacement cam gears tha weren't adjustable so I guess he assumed you could figure that out. obviously just fitting them doesn't do shit, they need to be tuned. on my GTR power went from 220kw atw to 247kw atw purely though cam gear adjustment. midrange was up around 30kw from about 3500rpm upwards.

andrewd, a little bit of personal advicee. you may not like 31nismoid, but have your wits about you and recognise that he is a long standing, respected member and moderator of this forum. you on the other hand have been a member here for just under 1 month and so far have not contributed much at all so lay off the personal attacks (to nismoid or anyone else for that matter) as things will progress very simply from there. warning, warning, ban.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Yes - adjustable cam gears... I thought anyone would realise the stock ones arent adjustable so you need to either

1) mod the stockers (cheap)

2) purchase adj ones (little more costly)

Ah yeah, what Beer Baron said for the rest of it.

Faid Collaborator

Faid

Posted
Posted (edited)

The 26 benefits a lot from some cam gears, as i have experienced last week. i dont know why people talk shit when they dont know a thing about what they are talkin about. And nismoid ur advice can hit hard and sarcastic at some times, but till now i have read good advice from your posts, especially when i was about to build my engine.

Edited by Faid

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Duncan
      ugently need expert / experienced opinion

      By Duncan · Posted

      Man that dinner was such a long time ago....2010! I would only replace the rubber coolant lines with silicone these days; cheap, readily available and will last for ever. You will need new hose clamps though eg https://justjap.com/products/cooling-pro-silicone-engine-heater-hose-set-black-nissan-r32-gtr-rb26dett
    • MBS206
      ugently need expert / experienced opinion

      By MBS206 · Posted

      I wouldn't look too hard at what they did with the R32 GTR in endurance racing in Australia... Lots of things weren't actually available from the factory in the way those cars ran them... Japan also followed what Fred Gibson was doing here with some of there endurance cars in Japan... Australia is also the reason for things like the Brembo brakes, and the change in the gearbox... And quite a few other tricks they used to pull. There's a few other SAU peeps still on these forums that will have heard the stories direct from Alan Heaphy, Fred Gibson, and Jim Richards when we were lucky enough to have a great dinner with them
    • joshuaho96
      ugently need expert / experienced opinion

      By joshuaho96 · Posted

      For all the talk of "these parts are junk" I generally recommend OEM because it's really not as bad as claimed. I have never seen or heard of a case like the N63 where the oil returns completely clog with coked oil for example in ~10 years or less. Would it be nice if it were a straighter path? I guess, but most modern cars use a scavenge pump instead of a pure gravity return. Also the factory lines that would be relatively simple to convert to braided are generally speaking hardlines from the factory. I would consider braided line to be a regression, not an improvement. It's also been engineered such that all the hardlines have appropriate strain relief where needed. There's absolutely room for improvement, for example the HKS advantage heritage intake piping shows just how much can be done to make the turbos fight each other less in OEM twin turbo configuration and reduce compressor surge but it's rarely a simple/straightforward process. I recommend looking at what the group A/N1 cars did, generally speaking the changes they made were necessary and proven in endurance racing.
    • GTSBoy
      Turn signal wiring question

      By GTSBoy · Posted

      Yes, multi relays needed, and possibly a diode. I'm not actually going to think about it though.
    • VicFlo
      Speedo and odometer reading super slow r34gtt a/t

      By VicFlo · Posted

×
×
  • Create New...