Valve sizes - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

Syed Shah · 16th August 2006, 12:58 PM

Hi,

Could anyone tell me the intake and exhaust valve sizes for the RB26 head? Do people do oversize (+1mm or 2mm) on eirther when going for big power/revs (700Hp/9000rpms).?

Thanks

Syed

Syed Shah · 16th August 2006, 09:42 PM

BUMP - does nobody know the stock valve sizes???!!

tyndago · 16th August 2006, 11:16 PM

Intake is 34.5 mm

Exhaust is 30 mm.

Stock exhaust are sodium filled. They are good valves.

From what I have seen and heard, its not really necessary to change valves to you are really up there in power.

Syed Shah · 17th August 2006, 07:37 AM

Excellent - thanks Sean.

16th August 2006, 12:58 PM	#1 (permalink)
Syed Shah GTR Register Member Join Date: Feb 2002 Location: Milton Keynes Posts: 159	Valve sizes Hi, Could anyone tell me the intake and exhaust valve sizes for the RB26 head? Do people do oversize (+1mm or 2mm) on eirther when going for big power/revs (700Hp/9000rpms).? Thanks Syed

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16th August 2006, 09:42 PM	#2 (permalink)
Syed Shah GTR Register Member Join Date: Feb 2002 Location: Milton Keynes Posts: 159	BUMP - does nobody know the stock valve sizes???!!

16th August 2006, 11:16 PM	#3 (permalink)
tyndago GTR Register Member Join Date: Oct 2002 Location: LBC , CA Posts: 2,400	Intake is 34.5 mm Exhaust is 30 mm. Stock exhaust are sodium filled. They are good valves. From what I have seen and heard, its not really necessary to change valves to you are really up there in power.

17th August 2006, 07:37 AM	#4 (permalink)
Syed Shah GTR Register Member Join Date: Feb 2002 Location: Milton Keynes Posts: 159	Excellent - thanks Sean.