Maximum Power On Stock Rb26-Bottom?

[TP_]

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

[The Dan]

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]

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

[GTSBoy]

Yuh. When you really THINK about it, 575HP really IS 600HP. You cannot tell the difference. 2 different dynos can easily give you those two numbers off the same car.

[vh45tt]

after 600hp they turn a little into a hand grenade, no sure when the go bang

[R31Nismoid]

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.

[vh45tt]

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.

[WMDC35]

/\ this, the last line

[GTScotT]

+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.

[mico]

I'd say 400whp, piddly bigger all.

[Noy]

There is a 34 GTR in Brisbane running 801AWHP with stock bottom end....

I'll be watching to see how it holds together.

[SiR_RB]

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