Does anyone know the differences between the reved up VQ 35 and the regular VQ35 in the G35/Z's?

Also what is the fuel cut on the reved up motor. Not the redline but the actual fuel cut.

 

Cams for sure are different, I'm quite certain about the fuel cut.

 

Cams, LIM, VTC's, according to Nissan it (max engine speed) is 7000. I've heard of 7100


http://www.nissannews.com/

 

Better oil pump as well.

 

See no none can answer it. My 2006 G35 coupe has this engine and the "redline" is 7000rpm but it winds all the way up to 7600rpm and i couldn't feel an ignition cut. I posted this question on G35driver but no one responded.
Also are the heads different?

 

^^ All that proves is that the tachometer is inaccurate.

 

nismology is correct. my g35 auto will shift at redline 6600 in drive but manumatic mode it has not hit the rev limiter at 7100-7200. Just like my maxima, the tach is way off in upper rpms.

 

And that wouldn't be anything new either.

My tach shows fuel cut to be 6800-6900 while my VAFC-II shows fuel cut to be more like 6650. I think several other 5.5 Gens have seen the same thing as well.

 

Get a datalogger and get REAL data. My car's stock rev limit was verified @ 6650, tach indicated ~ 6800 RPM.

Now, rev limit is @ 7100, and the tach indicates ~ 7500. Seems like the tach begins to become more and more 'off' as revs increase. Cruising around town, anything under 3500 is dead on (data with respect to tach reading) anything after that and it becomes more and more inaccurate.

 

my tach has always been dead on when i hit indicated 7900 rpm my fuel would cut and my cut is suppose to be 8k

 

You have an A32 tachometer. This doesn't necessarily apply to you.

 

My A32 tach is much more accurate that the one in my A33B.

 

i have have my buddy hook up the consult III next time i am in the dealership. I wish someone knew the published valve for sure since i am not keen on reving it up there i just would like to know.

Does anyone knwo if the heads are different?

 

The heads will have a different part number simply because of the different (stronger) valve springs and retainers. Everything else in the head is exactly the same.

 

The reason i ask is i have a set of VQ35DE heads from a FX35 I wanted to get ported but I wasn't sure if they are the same. I know my reved up motor has VTC on exhaust and Intake cams. I know the FX engine did not.

 

Dont they have stronger rod bolts too (like the ARP ones)?

 

Yes they do, but their likely the nismo bolts which wouldn't be as strong as the ARP bolts IMO. This is no matter though because we were talking about the heads in particular, not general differences.

 

i am planning on dynoing once i have 5k on the clock so we will see how this does compared to the non reved up vq35 de
i have my brothers old 03 VQ35DE G35 dynos

 

http://www2.freshalloy.com/showpost....7&postcount=36

 

That list sounds like preliminary speculation based on a simple part number search, not something that nissan said or individual research.


Connecting rod - Highly doubt it. Since the connecting rod is sold as an assembly complete with the rod bolts it would have a different part number because the rod bolts are different.

Crankshaft - Highly doubt it. The OEM crank is good for 10k revs when balanced. I doubt they'd change it. The part number might have changed due to it being made in a different country. Much like some A34 engine parts having different part numbers but being exactly the same. For instance, the A34 intake manifold has a different part number and is cheaper than the A33B's because it was made stateside.

Cylinder head - This hasn't been confirmed. The cylinder head will have a different part number than the regular VQ's simply due to different valve springs and retainers. Remember it is sold as an assembly.

Piston - Highly doubt it again. The compression ratio didn't change so why would the pistons change? The piston ring set has a different part number (and also inferior IMO since ALOT more revups are burning oil, relatively speaking) so maybe the pistons are sold as an assembly complete with rings and the whole assembly has a diffferent part number.


Since he's asking about the heads, we'd have to see if the actual casting is different with the revup. I'm looking for pictures as we speak.

 

I agree with ^^ just googling and came across it.

Also has an EGR port that the A33B does not have.

 

Oh yea. I forgot about that.

That's why the part number is different. It's cheaper though because it's made in the US.