Oddball plenum - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

GTR-Zilla · 30th July 2005, 09:24 PM

Just realised today looking at my plenum, it has a welded metal peice with a washer and bold on each of the 6 branches that connect to the TB's

I never realised this until today, and looking at some other GTR's they dont have them...

what is the purpose of this???? can anyone help>?

GT-R Glenn · 30th July 2005, 10:32 PM

A picture speaks a thousand words

Pikey · 31st July 2005, 12:58 PM

Previous nitrous installation?

GTR-Zilla · 1st August 2005, 05:52 PM

heres the pic and the unknown bits

playasyougo · 1st August 2005, 05:58 PM

Previous nitrous installation

GTR-Zilla · 1st August 2005, 06:04 PM

is NOS common in japan? The car was a fresh import from japan..

SteveN · 1st August 2005, 06:25 PM

Yup, looks like quite a serious nitrous instalation, would be running at least a 150shot if its direct port like that

Pikey · 1st August 2005, 06:26 PM

Definitely either direct port nitrous kit, or six more injectors

Try and find any more tell-tale signs of nos - any holes drilled for a bottle mount in the boot? Evidence of a trigger switch within reach of the driver?

Its sound though mate, as long as you have no idle problems. If you do, use some PTFE tape to seal those bolts in

Pikey · 1st August 2005, 06:28 PM

Alternatively - I'll swap my plenum with you

GTR-Zilla · 1st August 2005, 06:59 PM

no tell tale signs of NOS at all on the car, no drilled holes etc I know the car did have a roll cage though

hmm if it was NOS with the owner in japan, no wonder my clutch is dead..

do you seriously want to exchange the plenum? im up for it...

If they had used NOS would they have used bronze guides?

do these look like bronze ones?

playasyougo · 1st August 2005, 11:30 PM

The welded on boss's do look quite big for a direct port nitrous kit.

Think the possibility of 6 other injectors being fitted is a good idea.

GTR-Zilla · 2nd August 2005, 08:35 AM

but how would injectors fit in there?

nos sounds about right but not sure if the jets are smaller, the bosses are big though..

SteveN · 2nd August 2005, 08:44 AM

Dont look to me like injector ports at all, not in the slightest, no provision for a rail, not aimed towards the inlet ports, and are threaded bosses...

Looks like perfect fit for 6x nitrous fogger jets tho...

Hugh Keir · 2nd August 2005, 09:27 AM

It looks like an old plenum of mine.

Rod had the bungs welded on for me in case I wanted to fit NOS.

Abbey M/S · 2nd August 2005, 09:52 AM

NOS is on the wrong side of the throttle bodies IMHO. 1 easy way to blow the Plenum off if you have a misfire on the GAS.

30th July 2005, 09:24 PM	#1 (permalink)
GTR-Zilla Banned Join Date: May 2005 Location: London Posts: 2,099	Oddball plenum Just realised today looking at my plenum, it has a welded metal peice with a washer and bold on each of the 6 branches that connect to the TB's I never realised this until today, and looking at some other GTR's they dont have them... what is the purpose of this???? can anyone help>?

1st August 2005, 06:59 PM	#10 (permalink)
GTR-Zilla Banned Join Date: May 2005 Location: London Posts: 2,099	no tell tale signs of NOS at all on the car, no drilled holes etc I know the car did have a roll cage though hmm if it was NOS with the owner in japan, no wonder my clutch is dead..do you seriously want to exchange the plenum? im up for it... If they had used NOS would they have used bronze guides? do these look like bronze ones? Last edited by GTR-Zilla; 1st August 2005 at 07:07 PM.

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30th July 2005, 10:32 PM	#2 (permalink)
GT-R Glenn GTR Register Member Join Date: Nov 2002 Location: Waiuku NZ Posts: 1,298	A picture speaks a thousand words

31st July 2005, 12:58 PM	#3 (permalink)
Pikey GTR Register Member Join Date: Feb 2004 Location: Cheltenham Posts: 4,151	Previous nitrous installation?

1st August 2005, 05:52 PM	#4 (permalink)
GTR-Zilla Banned Join Date: May 2005 Location: London Posts: 2,099	heres the pic and the unknown bits

1st August 2005, 05:58 PM	#5 (permalink)
playasyougo GTR Register Member Join Date: Nov 2003 Location: Edinburgh Posts: 357	Previous nitrous installation

1st August 2005, 06:04 PM	#6 (permalink)
GTR-Zilla Banned Join Date: May 2005 Location: London Posts: 2,099	is NOS common in japan? The car was a fresh import from japan..

1st August 2005, 06:25 PM	#7 (permalink)
SteveN GTR Register Member Join Date: Aug 2002 Location: Just off the M5/A40 Posts: 7,209	Yup, looks like quite a serious nitrous instalation, would be running at least a 150shot if its direct port like that

1st August 2005, 06:26 PM	#8 (permalink)
Pikey GTR Register Member Join Date: Feb 2004 Location: Cheltenham Posts: 4,151	Definitely either direct port nitrous kit, or six more injectors Try and find any more tell-tale signs of nos - any holes drilled for a bottle mount in the boot? Evidence of a trigger switch within reach of the driver? Its sound though mate, as long as you have no idle problems. If you do, use some PTFE tape to seal those bolts in

1st August 2005, 06:28 PM	#9 (permalink)
Pikey GTR Register Member Join Date: Feb 2004 Location: Cheltenham Posts: 4,151	Alternatively - I'll swap my plenum with you

1st August 2005, 11:30 PM	#11 (permalink)
playasyougo GTR Register Member Join Date: Nov 2003 Location: Edinburgh Posts: 357	The welded on boss's do look quite big for a direct port nitrous kit. Think the possibility of 6 other injectors being fitted is a good idea.

2nd August 2005, 08:35 AM	#12 (permalink)
GTR-Zilla Banned Join Date: May 2005 Location: London Posts: 2,099	but how would injectors fit in there? nos sounds about right but not sure if the jets are smaller, the bosses are big though..

2nd August 2005, 08:44 AM	#13 (permalink)
SteveN GTR Register Member Join Date: Aug 2002 Location: Just off the M5/A40 Posts: 7,209	Dont look to me like injector ports at all, not in the slightest, no provision for a rail, not aimed towards the inlet ports, and are threaded bosses... Looks like perfect fit for 6x nitrous fogger jets tho...

2nd August 2005, 09:27 AM	#14 (permalink)
Hugh Keir GTR Register Member Join Date: Jul 2001 Location: Aberdeen Scotland Posts: 1,545	It looks like an old plenum of mine. Rod had the bungs welded on for me in case I wanted to fit NOS.

2nd August 2005, 09:52 AM	#15 (permalink)
Abbey M/S GTR Register Member Join Date: Feb 2002 Location: The workshop... Posts: 1,964	NOS is on the wrong side of the throttle bodies IMHO. 1 easy way to blow the Plenum off if you have a misfire on the GAS.