Os Giken R33 box or Getrag 6 Speed? - Page 2 - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

pupsi · 21st July 2008, 08:48 PM

Go with the Giken, I've got the Giken internals in my box, so far no complaints, I'll be running around 650-700bhp, as soon as the T04z goes on, was planning to run 800+bhp but changed the turbo set-up for better response from the T04z.

Mashrock · 23rd July 2008, 11:58 AM

i been running the getrag in my 32 for about a year now, best money spent.

will have a r34 n1 motor to pop in it soon also!

only issue that has come to mind is the fibre synchros i am searching down a mod that toyota people do to their box in the states that use brass upgrades.

tho i have not had an issue with the synchros as of yet

Piggaz · 25th July 2008, 08:05 AM

Cant comment on this at the moment, but i will be able to soon. My R33 spat 3rd gear and have rebuilt it with the OS set.... Will get back to you!

kismetcapitan · 25th July 2008, 10:59 AM

ah, I plan on going with a Getrag if/when my transmission dies. Having seen the transmission and engine connections in detail, it's a pretty easy modification.

I don't think the 4.111 ratio will be all that bad...will it? The short gearing should make acceleration all the more quick?

moleman · 25th July 2008, 02:51 PM

Toby, I've had a Getrag in my 33 for over two years now. Apart from a recent selector fork problem, I've had no issues at all. 500+bhp used an awful lot on track.

The 4.111 diffs give an excellent spread of gears, but it does lower your top end. 8k in 6th being around 188mph. 8.5k will give 199mph.

I spoke to *cough - name drop* Hiroshi Tamura about this, as he has the same set up in his 32 in Japan. He said that in his opinion the 4.111 is ideal for road but not so good for track because the constantly hitting high revs makes for higher temps.

He said the ideal diffs are the Nismo 3.9s which, with the correct tyre size, give a genuine 200mph at 8k rpm and a very good gear spread.

25th July 2008, 02:51 PM	#20 (permalink)
moleman Administrator Join Date: Jun 2003 Location: In the bushes, watching YOU!!! Posts: 7,205	Toby, I've had a Getrag in my 33 for over two years now. Apart from a recent selector fork problem, I've had no issues at all. 500+bhp used an awful lot on track. The 4.111 diffs give an excellent spread of gears, but it does lower your top end. 8k in 6th being around 188mph. 8.5k will give 199mph. I spoke to cough - name drop Hiroshi Tamura about this, as he has the same set up in his 32 in Japan. He said that in his opinion the 4.111 is ideal for road but not so good for track because the constantly hitting high revs makes for higher temps. He said the ideal diffs are the Nismo 3.9s which, with the correct tyre size, give a genuine 200mph at 8k rpm and a very good gear spread. __________________ I'd love to stop and chat, but you're an idiot. Ich liebe die Grüne Hölle. Only ABBEY MOTORSPORT, CATDT and SPINAL TAP go up to eleven! Don't ask a stupid question, try FAQ and Search first.

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21st July 2008, 08:48 PM	#16 (permalink)
pupsi GTROC Member Join Date: Aug 2006 Location: West London Posts: 1,701	Go with the Giken, I've got the Giken internals in my box, so far no complaints, I'll be running around 650-700bhp, as soon as the T04z goes on, was planning to run 800+bhp but changed the turbo set-up for better response from the T04z.

23rd July 2008, 11:58 AM	#17 (permalink)
Mashrock GTR Register Member Join Date: Jan 2005 Location: Sydney, Australia Posts: 150	i been running the getrag in my 32 for about a year now, best money spent. will have a r34 n1 motor to pop in it soon also! only issue that has come to mind is the fibre synchros i am searching down a mod that toyota people do to their box in the states that use brass upgrades. tho i have not had an issue with the synchros as of yet

25th July 2008, 08:05 AM	#18 (permalink)
Piggaz GTR Register Member Join Date: Sep 2002 Location: Sydney, Australia Posts: 712	Cant comment on this at the moment, but i will be able to soon. My R33 spat 3rd gear and have rebuilt it with the OS set.... Will get back to you!

25th July 2008, 10:59 AM	#19 (permalink)
kismetcapitan GTR Register Member Join Date: Nov 2005 Location: Seoul Korea Posts: 5,973	ah, I plan on going with a Getrag if/when my transmission dies. Having seen the transmission and engine connections in detail, it's a pretty easy modification. I don't think the 4.111 ratio will be all that bad...will it? The short gearing should make acceleration all the more quick?