-7/9s Or -5s Garretts

[Marko R1]

did u keep your -10's on your sperm whale paul or did u switch to -5's?

[Piggaz]

did u keep your -10's on your sperm whale paul or did u switch to -5's?

The sperm whale is still powered by RS's BUT I have bought a set of 5's to go on. Who can say no to 1000 RPM less to get to fullboost?

[Marko R1]

The sperm whale is still powered by RS's BUT I have bought a set of 5's to go on. Who can say no to 1000 RPM less to get to fullboost?

will you get full boost at the same revs as my rb30? should be similar right?

-5's on rb28

-10's on rb30

...will be interesting!

[Piggaz]

It shall be. With nice and small cams (maybe the mines 252's @ 10.05mm) and 'tickled' -5's. Should be alot better than the choo choo choO chOO cH00 CH00 CHOOF CHOOF CHOOF I have now!

[Marko R1]

It shall be. With nice and small cams (maybe the mines 252's @ 10.05mm) and 'tickled' -5's. Should be alot better than the choo choo choO chOO cH00 CH00 CHOOF CHOOF CHOOF I have now!

did you ever try running that baffled twin turbo pipe i bought off you? im sure u said no at the time due to the hard pipe kit, you're more than welcome to try it though if u like

[Marko R1]

Your setup should come on boost sooner than mine paul as I had 280 degree cams with 10.8mm lift. My -5s I had on my rb26 was quite responsive, not like my -10s on rb30, but really not far off at all.

You will be happy if that is what you're chasing

[Piggaz]

did you ever try running that baffled twin turbo pipe i bought off you? im sure u said no at the time due to the hard pipe kit, you're more than welcome to try it though if u like

It came off my car that night!!!! Lol. It was on my car for years.

[Piggaz]

did you ever try running that baffled twin turbo pipe i bought off you? im sure u said no at the time due to the hard pipe kit, you're more than welcome to try it though if u like

It came off my car that night!!!! Lol. It was on my car for years.

[Marko R1]

...And it didn't take out the shuffle like it did on my 3ltr when we tested it?

[Piggaz]

It was an improvement yes. Either way the debate of 5's and RS's/10's has been had many times. Gav's result sums it up perfectly.

Anyway, back on topic.... SS's and -9's wasn't it

[N1GTR]

Yes, they're the same. End of story.

Next!

[sydking]

why are there so many dyno sheets on here with -5 setups and under 350kw? actually most are around 315kw. from my understanding 350 can be reached with -9's and quicker then the other. Unless there is some sort of other advantage im overlooking?

[R31Nismoid]

People just select the wrong turbo and then only run 16psi

Or they dont have the other required supporting mods, listened to bad advice etc etc.

[Piggaz]

It's about having all the supporting mods. Exhaust being big enough, no '80 mm pipe going to a 60mm back into a 90''. All that shit needs to not exist. That costs money.

[sydking]

Would be interesting to see whats supporting mods people have used for a responsive -5 set up. I'm talking 3.5k and on song with 20psi. Even things like short gts4 gear ratios and lightend fly wheel matched with cam timing.

[R31Nismoid]

No chance that'll happen with -5s on a 2.6ltr.

You'd need a stroker or 3ltr bottom end.

[sydking]

Anyone know roughly how much quicker the gts4 gears rev up over std gtr

[Rolls]

4.375 vs 4.111 ratio

[R.3.2.G.T.R]

Anyone know roughly how much quicker the gts4 gears rev up over std gtr

download program called gearcalc and it will give you all the details

[hazjaz]

Sorry to be bumping this back up but it has been a very good read. I'm still confused.. Is there a GT2860-9? Or are they listed as a GT2859R-9?? I have been in contact with GCG and they were telling me that the -7 turbos are bigger and have a bigger inlet and will make me more power then the -9.. But this thread has told me other wise.. Please help lol