Jump to content
SAU Community

Maximum Power On Stock Rb26-Bottom?

TP_

By TP_,
in Engines & Forced Induction

 Share

Recommended Posts

TP_ Contributor

TP_

Posted
Posted

Hi!

My Stagea 260RS is currently mapped to 575hp (497awhp), the guy who tunes my car told me to not go higher than 1.4 bars of pressure with my GT2530 turbos when running a stock bottom.

If I don't recall wrong, I've seen people here with ~600hp on stock bottoms.

A friend drove his R32 GTR for 80 000 kilometers with 560hp and a rev limit set to 8500 on a stock bottom RB26 over a 5 year period, the oil pump gears finally broke due to usage of launch for 2 summers.

How much boost/hp is safe?

Thanks

Mattias@Sweden

Link to comment
https://www.sau.com.au/forums/topic/408940-maximum-power-on-stock-rb26-bottom/
Share on other sites
The Dan Grand Master

The Dan

Posted
Posted

Hi!

My Stagea 260RS is currently mapped to 575hp (497awhp), the guy who tunes my car told me to not go higher than 1.4 bars of pressure with my GT2530 turbos when running a stock bottom.

If I don't recall wrong, I've seen people here with ~600hp on stock bottoms.

A friend drove his R32 GTR for 80 000 kilometers with 560hp and a rev limit set to 8500 on a stock bottom RB26 over a 5 year period, the oil pump gears finally broke due to usage of launch for 2 summers.

How much boost/hp is safe?

Thanks

Mattias@Sweden

Do you trust your tuner?

SiR_RB Grand Master

SiR_RB

Posted
Posted

Is this on E85 or 98 octane?

Mines making around 465rwhp stock bottom end for around 10'000kms so far on 98

No issues, compression still at 160psi each pot, done 2 drag days with another coming soon, on around 21psi

But I trust my tuner 100% and I'm prepared to rebuild "when" the engine has enough

Their is no magical limit depends on alot of variables like tune/condition of engine/fuel/ max revs etc etc

  • Like 1
R31Nismoid Grand Master

R31Nismoid

Posted
Posted

If I don't recall wrong, I've seen people here with ~600hp on stock bottoms.

A friend drove his R32 GTR for 80 000 kilometers with 560hp and a rev limit set to 8500 on a stock bottom RB26 over a 5 year period, the oil pump gears finally broke due to usage of launch for 2 summers.

How much boost/hp is safe?

How long is a piece of string?

Depending on age, use, condition, servicing, fuel - and anything else you can think of - will depend on how long it will last.

Will it last forever? Highly unlikely. Have seen people with only 450rwhp end up having to rebuild after 2-3 years of circuit racing as the motors just started to breathe heavy. So not blown, and not tune related, just age and use.

If you can't/don't want to rebuild, then don't chase the power. It's as simple as that really.

  • Like 1
vh45tt Contributor

vh45tt

Posted
Posted

How long is a piece of string?

Depending on age, use, condition, servicing, fuel - and anything else you can think of - will depend on how long it will last.

Will it last forever? Highly unlikely. Have seen people with only 450rwhp end up having to rebuild after 2-3 years of circuit racing as the motors just started to breathe heavy. So not blown, and not tune related, just age and use.

If you can't/don't want to rebuild, then don't chase the power. It's as simple as that really.

thats very true.

GTScotT Grand Master

GTScotT

Posted
Posted

+1 how long is a piece of string. Have seen plenty of blown RB26s that were still in mostly factory trim (stock turbos, stock tune, etc).

I personally wouldnt put 600whp through one and expect it to last very long at all. My personal feeling for a limit on these things is 500whp, and I'd put a very forgiving 30,000 km life on it at most (street driving with some fun here and there). Some people will have seen more, most would have seen less. Thats just my opinion from reading countless posts and knowing people who have built such setups.

SiR_RB Grand Master

SiR_RB

Posted
Posted

Think also the main things are to keep oil temps under control with an aftermarket oil cooler

Run good quality engine oil (ester base 100% synthetic)

Keep intake temps down (turbos not at their limit pushing hot inefficient air down its throat)

Keep the rev limit sane (eg under 8000rpm)

Then you might have half a chance of it lasting abit longer

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

    • GTSBoy
      Best place to order Authetic R32 Parts in Japan

      By GTSBoy · Posted

      I don't. I mean, mine's not a GTR, but it is a 32 with a lot of GTR stuff on it. But regardless, I typically buy from local suppliers. Getting stuff from Japan is seldom worth the pain. Buying from RHDJapan usually ends up in the final total of your basket being about double what you thought it would be, after all the bullshit fees and such are added on.
    • GTSBoy
      Ethanol Content Sensor - Always at 11%?

      By GTSBoy · Posted

      The hydrocarbon component of E10 can be shittier, and is in fact, shittier, than that used in normal 91RON fuel. That's because the octane boost provided by the ethanol allows them to use stuff that doesn't make the grade without the help. The 1c/L saving typically available on E10 is going to be massively overridden by the increased consumption caused by the ethanol and the crappier HC (ie the HCs will be less dense, meaning that there will definitely be less energy per unit volume than for more dense HCs). That is one of the reasons why P98 will return better fuel consumption than 91 does, even with the ignition timing completely fixed. There is more energy per unit volume because the HCs used in 98 are higher density than in the lawnmower fuel.
    • GTSBoy
      Blue slip

      By GTSBoy · Posted

      No, I'd suggest that that is the checklist for pneumatic/hydraulic adjustable systems. I would say, based on my years of reading and complying with Australian Standards and similar regulations, that the narrow interpretation of Clause 3.2 b would be the preferred/expected/intended one, by the author, and those using the standard. Wishful thinking need not apply.
    • GTSBoy
      Blue slip

      By GTSBoy · Posted

      Yes they do. For some maybe. But for those used the most by abusers, ie Skylines, the numbers are known. The stock eyebrow height for R32/3 Skylines is about 365/375mm or thereabouts. The minimum such heights are recorded in adjacent columns in the database.
    • soviet_merlin
      Ethanol Content Sensor - Always at 11%?

      By soviet_merlin · Posted

      Hmmm, interesting. Makes me wonder whether there is bias as well. It's the cheapest fuel, so it is used for all kinds of ill-maintained shitboxes which are bound to have issues regardless. Nicer cars tend to require higher octane rated fuel and can't use it anyway. FWIW, the official NSW E10 facts page is decent. 
×
×
  • Create New...