T04Z v T51 KAI

[GT-R Glenn]

Wont to4z's make over 700hp easy ?
Like close to 800.

[R.I.P.S NZ]

Originally Posted by GT-R Glenn

Wont to4z's make over 700hp easy ?
Like close to 800.

A friend's R32 has over 700whp (in 2wd) with one on his RB30 with 1.8 bar and Av gas so 800bhp+ is def possible in some cases.

There's alot more to making the power than just the turbo.

Rob

[GT-R Glenn]

Ok thats what I thought , just a few post's seem to be saying its a 650hp supply.
That red stationwagon, is it rs260? makes way over 700hp /to4z

[R.I.P.S NZ]

Originally Posted by GT-R Glenn

Ok thats what I thought , just a few post's seem to be saying its a 650hp supply.
That red stationwagon, is it rs260? makes way over 700hp /to4z

Yes, 700+ is very easy IMHO but keep in mind our NZ hp is much different to UK hp aparently, this coupled with our down hill 300 meter tracks gives us our impossible drag times.

There's alot more to getting 700hp + from a motor than just bolting on a TO4z so there may be other differences also.

Rob

[GT-R Glenn]

Yes, 700+ is very easy IMHO but keep in mind our NZ hp is much different to UK hp aparently, this coupled with our down hill 300 meter tracks gives us our impossible drag times.

Apparently the problem is worse across the tasman, Oz tracks go even faster .....
It might be because they are closer to the equator ,which effectively means they are steeper , I guess \

[R.I.P.S NZ]

Originally Posted by GT-R Glenn

Apparently the problem is worse across the tasman, Oz tracks go even faster .....
It might be because they are closer to the equator ,which effectively means they are steeper , I guess \

Sounds about right to me

[Lith]

Here is a dyno plot from ST Hitec in NZ comparing a T04Z and a T51R Kai on the same engine (2.8litre RB) - T51R Kai is the higher power run. I'd go for the T51R Kai hands down, myself:

[NITO]

If you're using an RB30 you'll definately want the 1.0 housing I would have thought. I had the 0.96 housing on an RB28 and it was too small resulting in compressor surge problems. That's fine for an RB26, but on a larger capacity I would go the next size up.

I would be surprised if you saw more than 650bhp with the 0.96 housing, at sensible EGT's anyway, and with the larger housing you'd probably see 680-700 maybe. What are you revving upto?

Cheers
Nito

ps. Mine gave 580 at the hubs with a T04Z (0.96) on an RB28, pump gas, 1.6 boost iirc, 507lbs/ft on a dynapack. It's less than I wanted and wouldn't give anymore. It also had compressor surge issues when it was retuned for higher power. Basically the cams were being overwhelmed with boost before they'd fully opened (only in 6th gear). V-cam would have helped this I'm sure, but ultimately, I'd have gone for the larger housing which would have run cooler EGT's. And I was considering a T51 Kai BB

[pupsi]

Looking for the power mainly in the mid-range rather than the top end. Going for the bigger housing 1.0 will mean compensating for less power in the midrange to have more power at the top-end. Going keep the revs below 8250rpm??

P.S.
The T51 Kai BB is the next step.

[NITO]

How early do you want your power! Here's mine RB28, T04Z, 1.7bar and 272 10.2mm cams in/ex 1.2mm gasket.

(.81 Housing I believe, not 0.96, didn't know a .96 was available. Sorry!)



Cheers
Nito

[pupsi]

Thanks for the info (graph) Nito.