Standard Vs. Hybrid Boost Graph

[Torques]

I recently replaced my standard turbo with a hybrid (high flowed) unit.

With same settings I made this overlay from the dyno-plot to show the differences in spoolup.

I thought why not post it ..

Green=Hybrid

Red=Genuine Nissan

Essentially the Nissan turbo is @1BAR @2900RPM whereas the Hybrid needs 3700RPM for that.

I have no idea whether this is good or bad performance for a hybrid and will do some research.

The car feels not as laggy as the plot might suggest, so I'm quite happy with the result.

Cheers

[DVS JEZ]

What is the reason for the turbo swap? Will u up the boost and get it tuned to gain more power?

[Torques]

Well for once the standard turbo fell apart, and yes ... certainly, for more reliable boost/power.

The ECU was mapped to accommodate the higher boost anyhow.

What is the reason for the turbo swap? Will u up the boost and get it tuned to gain more power?

[The Mafia]

But it doesn't look like the new turbo made any extra power, just laggier down low? What kind is it?

[wolverine]

It looks a bit like a standard bush bearing rebuild.

[Torques]

Well,

This graph/post was not about power, but spool-up on same conditions.

(though power increased by 20HP with almost identical boost)

And 'yes' the turbo is a standard high flowed unit with bush bearings.

(good for 20PSI)

It looks a bit like a standard bush bearing rebuild.

Edited December 4, 2011 by Torques

[R31Nismoid]

Yeah definitely a cheap hi-flow.

More boost is required, much more.

[Torques]

This turbo was/is not cheap.

And the spoolup of the standard ball bearing Nissan unit is hard to beat.

Edited December 4, 2011 by Torques

[R31Nismoid]

If it was a bush bearing hi-flow, it couldn't have been expensive.

You can rebuild the cores for $400-$500!

Wouldn't have paid anymore than $1000-$1100 for a bushie hi-flow. They ain't worth anything more regardless of what retailers try and charge

[Legionnaire]

It's hard to say whether that kind of performance is good or bad 'cause you've given us very little info about the highflow unit to base our judgement on.

But standard turbo was designed around minimal lag concept - nylon compressor, ceramic turbo - so it's nearly impossible to even come close to it in terms of lag (or lack thereof). Nissan has done their homework with turbo matching, so the only question is how much more power you'll be able to squeeze out of the new turbo and if the new power level justifies newly introduced lag.

[Torques]

No, it was not as expensive as a BB HKS or Trust or ..

It was around $1100 and is a good quality unit 'made in UK ' by a company

that deals with commercial turbos on a industrial scale.

I doubt your $400, since you also have to machine the housings etc.

But anyhow, this was not so much the point of the my post and I am quite happy with the unit.

If it was a bush bearing hi-flow, it couldn't have been expensive.

You can rebuild the cores for $400-$500!

Wouldn't have paid anymore than $1000-$1100 for a bushie hi-flow. They ain't worth anything more regardless of what retailers try and charge

[Torques]

Amen to that!

Well, all the information I have that it is good for 20PSI and that

it is machined out quite a bit.

Stao (Hypergear) did like units in the past.

As usual with these units there is no compressor map available.

I will know about the turbo's capacity once I raised the boost.

As for spool-up I compared my plot to other turbos and my spool-up looks

OK in comparison.

Yes, I could have bought a nice HKS for 60% more $$$ but I wanted a drop im replacement for the time being ..

But again:

I just wanted to make this data available since I thought people might find it interesting ..

It's hard to say whether that kind of performance is good or bad 'cause you've given us very little info about the highflow unit to base our judgement on.

But standard turbo was designed around minimal lag concept - nylon compressor, ceramic turbo - so it's nearly impossible to even come close to it in terms of lag (or lack thereof). Nissan has done their homework with turbo matching, so the only question is how much more power you'll be able to squeeze out of the new turbo and if the new power level justifies newly introduced lag.

[Legionnaire]

Unfortunately max pressure of 20 psi is not enough. Knowing/finding out compressor origin, blade count and inducer/exducer measurements would be a good starting point to give a basic idea about its flow capabilities and max hp, the same can be said for turbine stage.

No one is talking you into spending big ₤₤ on turbo, but people have seen 1 bar @ 3700rpm with GT3076R (e.g. Lithium, The Mafia), which is also capable of 20 psi, but as a bouns it will produce significantly more HP.

On the other hand - if you're happy with your purchase and enjoying the car then none of the above really matters, does it?

[Torques]

Hmmm

I have this data somewhere, will be happy to post it.

The CHRA is Garrett.

Sure, boost is not everything, (in the end it is about flow anyhow)

But what you are getting at is compressor efficiency.

With these hybrids you have to trust the manufacturer quite a bit.

They said the turbo is good for about 350-380HP.

Also I have to say that I still have the standard exhaust / airbox on it.

(and only the R34 SMIC)

So all things considered I'm good and happy with what I have ATM.

(More to come)