Twin Gt-rs Or T04z

[Kranker]

Hey,

Currently getting the parts list sorted for a RB26 build im planning.

The motor will be based aroung one of the big brand 2.8 stroker kits, (prob HKS becuase of the fully counter balanced crank), but in the end it will come down to what is the best value.

Ill be using decent cams 260deg maybe 280deg. Looking for the car to be usable on the street, but ill be happy with power from around 4-4500 rpm and around 400awkw, maybe a touch more for track or drag days.

Ive narrowed my turbo choice to either a HKS GT-RS twin kit, or a single TO4Z. I havnt found much info on the GT-RS but they seem to be the next step up from 2530's. Are they laggy bastards, or will the 2.8 spool them nice a quick?

Same goes for the T04Z, have seen that quite a few guys here run the T04Z and make some great power, but is it realistically streetable? Will it have response close to the GT-RS's?

Opinions will be great, but i dont want this to be the old twin vs single dabate. Any other suggestions would be great.

Info from anyone who uses either turbo would be really appreciated.

Cheers

[paulr33]

i think (not %100, look at the rb26 turbo upgrade threads) you can get to 400rwkw with a pair of 2530s

if you can this will give you far better response than twin gt-rs or big single t04z, much more streetable

dont go bigger if you dont have to

[R31Nismoid]

There is already a bit of info floating about.

Take the time to read the RB26 dyno sticky. There are a few t04z results.

Also search around. GT-RS graphs have come up in a number of threads in the last 6 months

[Kranker]

Cheers for the replies guys.

Ill have a browse through that sticky and see what it says.

Still would appreciate any other info or comments.

[Gav]

Cheers for the replies guys.

Ill have a browse through that sticky and see what it says.

Still would appreciate any other info or comments.

I'm running GT-RS terbs on an HKS 2.8L stroker. A great set up and plenty of top end with bearable lag.......but......I made the choice to go down this route before the TO4Z was available. I've seen dynos of TO4Z equipped RB26 engines (standard and stroked cranks) overlaid over my graph by my tuner.

Believe me whe I tell you that these single give NOTHING away at lower revs to the GT-RS but just run away on the top end. In hindsight, I would thoroughly recommend the TO4Z over the GT-RS option if this is the top end power that you are chasing.

[Kranker]

Thanks for the info Gav,

Good to have some first hand experience.

You wouldnt happen to have those graphs would u? If they arent handy dont worry about it.

I do want a good top end, but not if I end up with bugger all down low. I think that a balance of mid-range and top-end is crucial for a real-world fast car, as opposed to a drag set up where you spend all your time between 6000 and 9000rpm.

Thanks again.