Cams from an BNR34 N1. - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

DarkChild · 8th July 2008, 06:30 PM

I did searches and was unable to get a straight answer.
Does the N1 have different cams from the normal RB26's? Some people say they have higher cam profiles, some say they are no different.
Can anyone clarify this?

joker69 · 8th July 2008, 06:49 PM

yes it has improved camshafts. but i don't know if the profile is different or what is other..

cheers

DarkChild · 8th July 2008, 07:02 PM

Thanks for the reply joker69.
Can you confirm this?

This is what I found on the Tomei website.
Looks like it's the same according to this chart.

So are they different? Has anyone actually measured and compared them?

DarkChild · 9th July 2008, 12:09 PM

Anyone?

tuRBy · 9th July 2008, 08:00 PM

without understanding japanese, the gtr34 and 34-n1 seem to have the same spec - which is different to 32 and 33 in the last in and ex columns (117&121)

, although the r32 and 33 have the number value [125] in the last [ex] column, and the r33 n1 has the number [120].

But i would read the duration and lift as the same for all, unsure what the last [in] and [ex] column values are for?

hodgie · 9th July 2008, 08:40 PM

From my understanding (and i maybe wrong) but i thought it was just the Nurs on the 34`s that had slightly different cams.

DarkChild · 9th July 2008, 10:13 PM

hodgie,
Do you know what are the specs for the cams from the N1 engine in the Nur's?

I want to make a comparison as I've gotten some Poncam Type B and I've been told they are not much of an upgrade from the stock N1's in the Nur's.

SAU_Roy · 13th July 2008, 03:53 AM

R34N1 (Nur) cams are the same lift, duration and L.C. as standard R34 GTR camshafts

The R32/33 N1's had the exhaust L.C. retarded 5 degs but the lobes are the same. Because of the crank angle sensor the R34 cams cannot be used in earlier GTRs

DarkChild · 13th July 2008, 04:13 AM

SAU Roy,
Thank you for the information. Can you confirm this?

I guess I don't feel so bad getting the Poncams after all.

Cheers

Jonne · 22nd July 2008, 11:07 PM

You can see the following on the Tomei sheet:
R32/33/34 GTR = intake cam 113 degree LSA and exhaust 125 degree LSA
R34 N1 GTR = intake cam 117 degree LSA and exhaust 121 degree LSA

So the cams are the same in the R34 N1 engine but they are times differently (cam timing).

Jonne

Moelders · 23rd July 2008, 05:48 AM

Jonne,

Surely the table reads that the 117 degree and 121 degree entries are for the R34 engines (N1 and Std)??
the 113 degree and 125 degree are for the R32 and 33 engines (Std) with 120 degree ex for the 33N1 engine??

Cheers.

8th July 2008, 06:30 PM	#1 (permalink)
DarkChild GTR Register Member Join Date: Nov 2004 Location: Kuala Lumpur, Malaysia Posts: 327	Cams from an BNR34 N1. I did searches and was unable to get a straight answer. Does the N1 have different cams from the normal RB26's? Some people say they have higher cam profiles, some say they are no different. Can anyone clarify this?

8th July 2008, 07:02 PM	#3 (permalink)
DarkChild GTR Register Member Join Date: Nov 2004 Location: Kuala Lumpur, Malaysia Posts: 327	Thanks for the reply joker69. Can you confirm this? This is what I found on the Tomei website. Looks like it's the same according to this chart. So are they different? Has anyone actually measured and compared them? Last edited by DarkChild; 8th July 2008 at 07:13 PM.

9th July 2008, 08:40 PM	#6 (permalink)
hodgie MODERATOR Join Date: Oct 2003 Location: Sat in my Car Posts: 4,765	From my understanding (and i maybe wrong) but i thought it was just the Nurs on the 34`s that had slightly different cams. __________________ 720 spinner at Spa, GTROC Southern Trackday Organiser, GTROC SW Rep. Hodgies Skyline GTR Site --

9th July 2008, 10:13 PM	#7 (permalink)
DarkChild GTR Register Member Join Date: Nov 2004 Location: Kuala Lumpur, Malaysia Posts: 327	hodgie, Do you know what are the specs for the cams from the N1 engine in the Nur's? I want to make a comparison as I've gotten some Poncam Type B and I've been told they are not much of an upgrade from the stock N1's in the Nur's. Last edited by DarkChild; 9th July 2008 at 10:17 PM.

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8th July 2008, 06:49 PM	#2 (permalink)
joker69 GTROC Member Join Date: Mar 2006 Location: Zurich, Switzerland Posts: 683	yes it has improved camshafts. but i don't know if the profile is different or what is other.. cheers

9th July 2008, 12:09 PM	#4 (permalink)
DarkChild GTR Register Member Join Date: Nov 2004 Location: Kuala Lumpur, Malaysia Posts: 327	Anyone?

9th July 2008, 08:00 PM	#5 (permalink)
tuRBy GTR Register Member Join Date: Feb 2006 Posts: 547	without understanding japanese, the gtr34 and 34-n1 seem to have the same spec - which is different to 32 and 33 in the last in and ex columns (117&121) , although the r32 and 33 have the number value [125] in the last [ex] column, and the r33 n1 has the number [120]. But i would read the duration and lift as the same for all, unsure what the last [in] and [ex] column values are for?

13th July 2008, 03:53 AM	#8 (permalink)
SAU_Roy GTR Register Member Join Date: Sep 2003 Location: Sydney Posts: 15	R34N1 (Nur) cams are the same lift, duration and L.C. as standard R34 GTR camshafts The R32/33 N1's had the exhaust L.C. retarded 5 degs but the lobes are the same. Because of the crank angle sensor the R34 cams cannot be used in earlier GTRs

13th July 2008, 04:13 AM	#9 (permalink)
DarkChild GTR Register Member Join Date: Nov 2004 Location: Kuala Lumpur, Malaysia Posts: 327	SAU Roy, Thank you for the information. Can you confirm this? I guess I don't feel so bad getting the Poncams after all. Cheers

22nd July 2008, 11:07 PM	#10 (permalink)
Jonne GTR Register Member Join Date: Nov 2006 Location: Holland Posts: 140	You can see the following on the Tomei sheet: R32/33/34 GTR = intake cam 113 degree LSA and exhaust 125 degree LSA R34 N1 GTR = intake cam 117 degree LSA and exhaust 121 degree LSA So the cams are the same in the R34 N1 engine but they are times differently (cam timing). Jonne

23rd July 2008, 05:48 AM	#11 (permalink)
Moelders GTR Register Member Join Date: Jul 2006 Location: Sydney Posts: 23	Jonne, Surely the table reads that the 117 degree and 121 degree entries are for the R34 engines (N1 and Std)?? the 113 degree and 125 degree are for the R32 and 33 engines (Std) with 120 degree ex for the 33N1 engine?? Cheers.