VQ35DE VS VQ35HR

[Hussain]

what's the difference? i know the HR is faster but why? and i heard our V6 A/C have HR heads, is that true?

[mcheddadi]

The VQ35HR has slightly different cam timings than the VQ35DE 'Revup'.

VQ35DE 'Revup' cam data

Engine: VQ35DE (3)Model Years: 2005-2006 (G35mt, 35th Anniversary 350Z)CVTC: Intake and Exhaust

Intake__Lift: 10.5mmExhaust_Lift: 10.5mm

Intake__Duration: 248ºExhaust_Duration: 248º

Intake_Opens: 2º ATDCIntake_Closes: 70º ABDC

Exhaust_Opens: 70º BBDCExhaust_Closes: 2º BTDC

Overlap: -4º----------------

VQ35HR

Engine: VQ35DECVTC: Intake and Exhaust

Intake__Lift: 10.5mmExhaust_Lift: 10.5mm

Intake__Duration: 248ºExhaust_Duration: 248º

Intake_Opens: 2º BTDCIntake_Closes: 66º ABDC

Exhaust_Opens: 68º BBDCExhaust_Closes: 0º BTDC

Overlap: 2º

The intake cam has been advanced by 4º and the exhaust cam has been advanced by 2º.

The spark plug lised in the ESM is the Denso FXE22HR11

Same smaller valves as on the 2007 Altima.

Stiffer valve springs than the 'revup' engine. Strongest springs to date on any known production VQ engine. They might be the same as the Nismo springs.

113-127lbs @ 26.2mm (vs. 98-110lbs @26.2mm revup)

Once piece main cap/girdle/skirt with six bolt mains. Similar or same design as the VQ40DE.

Suspisions about longer rods aren't true. The VQ35HR has the SAME 144.2mm rod length as all other VQ35s. Unless the ESM is wrong. But this block is supposed to be taller. The different might all be in the piston height.However it does have 57mm journals vs. the old 55mm journals (without bearing).54mm vs. 52mm Crank journals.Main crank journals increased to 64mm, up from 60mm.Main crank bearings thickened to 2.5mm up from 2.0mm.

[adidas2go]

Nice write up

[Mr. Music]

Nice write up

I don't know what half of it means, lol.

[shift_mikey]

Excellent info mcheddadi!! That has answered the majority of the questions i've had with the differences in this engine.

Sounds like the secret to bump 300 hp naturally aspirated is a couple of bump sticks

[LinkNuc]

Nice write up one morw thing...Don't forget nissan went to a dual intake on the newer Z's as well. mI think end of 2006

[rn79870]

Nice work. That is interesting.

----------------The VQ35HR has the SAME 144.2mm rod length as all other VQ35s. Unless the ESM is wrong. But this block is supposed to be taller. The different might all be in the piston height.

I think that the rods might be a little longer. Here is some info on the HR.

http://www.vq35hr.com/tech.shtml