T04Z v T51 KAI - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

pupsi · 24th June 2008, 06:48 PM

Which turbo out of these two will be the most reponsive ie; street racer, on a RIPs prepared RB30, fully ported race spec RB26 head, 1000cc injectors, Tomei 280 10.8 lift cams and gears and all supporting mods. Or is there another turbo to consider?? Looking for outright response rather than power output.

Jonne · 24th June 2008, 07:01 PM

For PURE respons I would definately go for the T04Z at (650bhp).
But that is only if you would rarely/never use the extra power from the T51R (800hp). I think the driveability is not that bad with a T51R KAI on a RB30, but that is always a personal preferance. The T51R KAI will definately have the car going around 4500RPM. The T04Z will be more around 4000RPM. It all depends how often you will use the extra power against the better response from the T04Z.
In the end I would take the T51R KAI

, but I never have enough power.

What will the car be used for mainly? Small street racer--> T04Z OR Highway racer --> T51R

Jonne

Kevingo · 24th June 2008, 07:11 PM

Hi mate

This is what a T51r Kai BB does on a circuit

On 1.45bar.

YouTube - Pro Import Skyline GT-R33 Time Attack

It's a 2.7L stroked Jun Engine with about the same specs as you discribed. We only have some more lift and duration on the cams. If you have any questions ask

Cheers,
Kevin

m6beg · 24th June 2008, 07:27 PM

Great video Kevin mate.

Well done dude.

Mick

mambastu · 24th June 2008, 07:31 PM

Nice vid and driving, that looks a bit of a handful to drive !

harris2182 · 24th June 2008, 08:12 PM

how i turn on java script?? tried to view that footage on youtube and it wouldnt let me?

banzai g · 24th June 2008, 08:15 PM

Class !!!!!!

G40tee · 24th June 2008, 08:35 PM

i may being a bit stupid but howcome youre using the clutch in a sequential boxed car?
thought you only use the clutch for pulling away?
stunning car and awesome drive!

m6beg · 24th June 2008, 09:38 PM

You still need to use the clutch in the sequential box.

Or you don't have to its called flat shifting.

Mck

Listerofsmeg · 24th June 2008, 09:45 PM

is that an ikeya shifter?

G40tee · 24th June 2008, 10:07 PM

didnt know they made anything that wasnt flat pack?
do DFS do a shifter too?

oh god that was aweful!haha

with a sequential do you have to rev match the gears so you dont have to worry about damaging any syncros etc or can you just ram it home?

is there any advantage to using the clutch over flat shifting? over saving the gearbox?

tweenierob · 24th June 2008, 10:13 PM

I find my OS88 shifts much nicer up through the box without the clutch, on the road i use the clutch to downshift but have shifted down a few times without. If you get the revs right it is nice to shift down without.

Rob

p.s. you should be banned for that!!! pmsl!!

Kevingo · 24th June 2008, 10:14 PM

I dont have to use the clutch i just do it to keep the gearbox a life as long as possible because we use this car on road drag and circuit. We don't come on a trailer we come with the car win the race and drives back home

LOL.

It's a OSgiken 6sp sequential btw.

Cheers dudes

Kevingo · 24th June 2008, 10:16 PM

That's true rob it shifts lovely without the clutch as well...

beaumackenzie · 25th June 2008, 01:24 AM

you want response? t51 no, twin's yes not sequential thou.

24th June 2008, 06:48 PM	#1 (permalink)
pupsi GTROC Member Join Date: Aug 2006 Location: West London Posts: 1,944	T04Z v T51 KAI Which turbo out of these two will be the most reponsive ie; street racer, on a RIPs prepared RB30, fully ported race spec RB26 head, 1000cc injectors, Tomei 280 10.8 lift cams and gears and all supporting mods. Or is there another turbo to consider?? Looking for outright response rather than power output.

24th June 2008, 07:01 PM	#2 (permalink)
Jonne GTR Register Member Join Date: Nov 2006 Location: Holland Posts: 140	For PURE respons I would definately go for the T04Z at (650bhp). But that is only if you would rarely/never use the extra power from the T51R (800hp). I think the driveability is not that bad with a T51R KAI on a RB30, but that is always a personal preferance. The T51R KAI will definately have the car going around 4500RPM. The T04Z will be more around 4000RPM. It all depends how often you will use the extra power against the better response from the T04Z. In the end I would take the T51R KAI , but I never have enough power. What will the car be used for mainly? Small street racer--> T04Z OR Highway racer --> T51R Jonne Last edited by Jonne; 24th June 2008 at 07:19 PM.

24th June 2008, 07:27 PM	#4 (permalink)
m6beg EUROPEAN RECORD HOLDER Join Date: Apr 2003 Location: TR RACING Posts: 4,378	Great video Kevin mate. Well done dude. Mick __________________ TWEENIEROB @ TR RACING OPIE OIL SERIOUS PERFORMANCE TURBODYNAMICS D-C-Y VP RACING FUELS

24th June 2008, 07:31 PM	#5 (permalink)
mambastu GTROC Member Join Date: Feb 2002 Location: West Sussex Posts: 603	Nice vid and driving, that looks a bit of a handful to drive ! __________________ Cheers Stu R32 GTR - Godzirra Twin turbo RB25'd 200SX RS13 - 405bhp and 348lbs ft on 15psi

24th June 2008, 08:35 PM	#8 (permalink)
G40tee GTROC Member Join Date: Feb 2008 Location: Bucks Posts: 856	i may being a bit stupid but howcome youre using the clutch in a sequential boxed car? thought you only use the clutch for pulling away? stunning car and awesome drive! __________________ Back to the good old days! :-p Christmas present for me maybe??

24th June 2008, 07:11 PM	#3 (permalink)
Kevingo GTR Register Member Join Date: Feb 2006 Location: Near by Amsterdam Posts: 204	Hi mate This is what a T51r Kai BB does on a circuit On 1.45bar. YouTube - Pro Import Skyline GT-R33 Time Attack It's a 2.7L stroked Jun Engine with about the same specs as you discribed. We only have some more lift and duration on the cams. If you have any questions ask Cheers, Kevin

24th June 2008, 08:12 PM	#6 (permalink)
harris2182 GTR Register Member Join Date: Nov 2006 Posts: 326	how i turn on java script?? tried to view that footage on youtube and it wouldnt let me?

24th June 2008, 08:15 PM	#7 (permalink)
banzai g GTR Register Member Join Date: Jan 2007 Location: bushmills northern ireland Posts: 418	Class !!!!!!

24th June 2008, 09:38 PM	#9 (permalink)
m6beg EUROPEAN RECORD HOLDER Join Date: Apr 2003 Location: TR RACING Posts: 4,378	You still need to use the clutch in the sequential box. Or you don't have to its called flat shifting. Mck __________________ TWEENIEROB @ TR RACING OPIE OIL SERIOUS PERFORMANCE TURBODYNAMICS D-C-Y VP RACING FUELS

24th June 2008, 09:45 PM	#10 (permalink)
Listerofsmeg GTROC Member Join Date: Jul 2006 Location: Shefford, Beds Posts: 1,716	is that an ikeya shifter? __________________ White R33 GTR Its working!! 10.908 @ 128mph on pump fuel and full trim!

24th June 2008, 10:07 PM	#11 (permalink)
G40tee GTROC Member Join Date: Feb 2008 Location: Bucks Posts: 856	didnt know they made anything that wasnt flat pack? do DFS do a shifter too? oh god that was aweful!haha with a sequential do you have to rev match the gears so you dont have to worry about damaging any syncros etc or can you just ram it home? is there any advantage to using the clutch over flat shifting? over saving the gearbox? __________________ Back to the good old days! :-p Christmas present for me maybe??

24th June 2008, 10:13 PM	#12 (permalink)
tweenierob GTROC Member Join Date: Aug 2003 Location: herts Posts: 1,738	I find my OS88 shifts much nicer up through the box without the clutch, on the road i use the clutch to downshift but have shifted down a few times without. If you get the revs right it is nice to shift down without. Rob p.s. you should be banned for that!!! pmsl!! __________________ Off to Dubai to map some R35's, 599.3hp and counting www.trracing.co.uk OSGiken 3.0l T51 back on... 3 track days before christmas

24th June 2008, 10:14 PM	#13 (permalink)
Kevingo GTR Register Member Join Date: Feb 2006 Location: Near by Amsterdam Posts: 204	I dont have to use the clutch i just do it to keep the gearbox a life as long as possible because we use this car on road drag and circuit. We don't come on a trailer we come with the car win the race and drives back home LOL. It's a OSgiken 6sp sequential btw. Cheers dudes

24th June 2008, 10:16 PM	#14 (permalink)
Kevingo GTR Register Member Join Date: Feb 2006 Location: Near by Amsterdam Posts: 204	That's true rob it shifts lovely without the clutch as well...

25th June 2008, 01:24 AM	#15 (permalink)
beaumackenzie GTR Register Member Join Date: Jan 2008 Location: P.N NZ Posts: 279	you want response? t51 no, twin's yes not sequential thou.

Thread Tools
Show Printable Version Email this Page
Display Modes	Rate This Thread
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode	Rate This Thread: