Highest Safe Boost For My Stock Rb26?

[Purchase]

ATM the exhaust is just cat back how big would you go the whole way through?

[(OO)SKYLINE(OO)]

ATM the exhaust is just cat back how big would you go the whole way through?

What's the diametre size of your car back?

If it's a 3", then go 3", if it's a 3.5" go 3.5" etc...

​Keep it consistent.

[CrimsonLey]

What N1 turbos you getting?

From memory they came from factory running about 1 Bar = 14.7 Psi.

(R32 GTR Nismo & N1 / R33 GTR N1 / R34 GTR V-Spec N1 & V-Spec II N1 / V-Spec II Nur / M-Spec Nur)

You could run a tad higher 1.1 Bar = 15.9 Psi / 1.2 Bar = 17.4 Psi.

What do you recommend? I'm open minded. Honestly, I was thinkin of purchasing the Garrett equivalents as I official N1 turbos would be pricey.

What's the diametre size of your car back?

If it's a 3", then go 3", if it's a 3.5" go 3.5" etc...

​Keep it consistent.

I thought these cars needed a little back flow. Having the whole exhaust the same size would not promote that.

[(OO)SKYLINE(OO)]

What do you recommend? I'm open minded. Honestly, I was thinkin of purchasing the Garrett equivalents as I official N1 turbos would be pricey.

Yes, genuine N1 turbos would be pricey at the same time rare to find.

Garrett -7's would be the closest to the N1 equivalents.

I am running Garrett -7's with 15.5 Psi, which is just over 1 Bar.

Later I will run about 18 Psi = 1.2 Bar, but will get my mechanic to see what he thinks best.

Many factors are involved but you'd run what's safe for the engine / what the turbos can handle, so when you go in for a tune after the twin turbo installation, your mechanic should be able to gauge what it can run.

I thought these cars needed a little back flow. Having the whole exhaust the same size would not promote that.

Not that I know of... That theory might apply to N/A cars... As you can only go so big unless it's tuned for it...

With turbocharged cars, usually the bigger the better, but 3" / 3.5" is usually the upgrade we all go for and it frees up the exhaust flow.

[Borci88]

​Just in regards to your bigger front mount intercooler, you were better off spending the money on Down and Front Pipes with a High Flow Cat.

Giving your GTR a full exhaust upgrade will benefit you more at this stage, if you just want to keep it stock-ish...

Stock GTR front mount intercooler can handle 300+ kW's.

But anyway, all for the better in the long run.

I know it'll do 400+ kW's for a fact as well

[Purchase]

What's the diametre size of your car back?

If it's a 3", then go 3", if it's a 3.5" go 3.5" etc...

​Keep it consistent.

I apolagize it has a 3.5 inch all the way through just had a look before with that and a bigger intercooler does that add any more hp with out a tune? Just curious cause next step is a bigger fuel pump, injectors, tune and ecu yeah?

[Hadouken]

At least 20hp

[Purchase]

At least 20hp

Yeajh didn't think it was too much

[(OO)SKYLINE(OO)]

I know it'll do 400+ kW's for a fact as well

yes clearly, you would know!

Good and thanks for clarifying that!

I apolagize it has a 3.5 inch all the way through just had a look before with that and a bigger intercooler does that add any more hp with out a tune? Just curious cause next step is a bigger fuel pump, injectors, tune and ecu yeah?

So your exhaust is all good then!

Depends on what power out put you want... How many kW's you want?

Which determine if you need a bigger fuel pump / injectors / ECU / Tune or not...

[Purchase]

yes clearly, you would know!

Good and thanks for clarifying that!

So your exhaust is all good then!

Depends on what power out put you want... How many kW's you want?

Which determine if you need a bigger fuel pump / injectors / ECU / Tune or not...

I'm looking for 350 hp at the wheels..... So im guessing I need a fair bit

[Hadouken]

lol, you dont even have to upgrade a thing for that power,

I made 250kw on stock front pipe, compliance cat, 3" exhaust and 12 psi boost on stock turbos, stock injectors and fuel pump

[Purchase]

Wow that's decent lol so that's without a tune? And just winding up the boost

[Hadouken]

Dont be silly. Ofcoarse itsvwith a tune

[Purchase]

What ecu were you running?

[(OO)SKYLINE(OO)]

I'm looking for 350 hp at the wheels..... So im guessing I need a fair bit

Which is about 261 rwkW's.

You stock injectors / fuel pump / ECU can handle it.

The ECU will need a slight tweak but nothing crazy.

What ecu were you running?

Run a Nistune or an APex'i Power FC.

[Hadouken]

Id say that you will very quickly get bored of 250kw. So i would recommend a link ecu. I shouldve skipped the power fc stage and gone straight to a link

[Purchase]

Id say that you will very quickly get bored of 250kw. So i would recommend a link ecu. I shouldve skipped the power fc stage and gone straight to a link

What link will you reccommend? Shouldn't get bored to quick as I'm only used to driving a vz sv6 haha

[CrimsonLey]

I'm looking for 350 hp at the wheels..... So im guessing I need a fair bit

Which is about 261 rwkW's.

You stock injectors / fuel pump / ECU can handle it.

The ECU will need a slight tweak but nothing crazy.

What ecu were you running?

Run a Nistune or an APex'i Power FC.

What's the highest stock whp that can be SAFELY achieved using stock components and N1 turbos?

Sent from my SC-03D

[Hadouken]

500kw

[(OO)SKYLINE(OO)]

What's the highest stock whp that can be SAFELY achieved using stock components and N1 turbos?

Sent from my SC-03D

To be safe for street use, anywhere around the 300kW mark at the rear wheels.

Two friends of mine on SAU are running stock RB26's but one has Garrett -7's and the other has Garrett -9's

Both making 300rwkW's, which is about 402HP at the wheels, if you want to measure in HP.

You could push it further but it will depend on the condition of the engine.