The new VQ35HR
I get that the internals are stronger, the heads are better, etc. But what about the compression ratio increase? Will that make going FI a nightmare? Especially for guys that can only get 91oct?
Or would you just pull the motor, overbore to resurface the cylinders, and install lower compression pistons thus making this a "cheap" motor build?
Curious to hear sharif's thoughts.
Or would you just pull the motor, overbore to resurface the cylinders, and install lower compression pistons thus making this a "cheap" motor build?
Curious to hear sharif's thoughts.
I small compression ratio increase, with increased combustion chamber and volumetric efficiency, would actually be very nice for FI. Tuning becomes more critical, but safety is not compromised.
I am starting to become convinced, that the rev-up engine is much stronger for FI than the non-rev up. We have a customer pushing close to 500whp on his rev-up, and he is literally beating the **** out of it....hasnt broken yet. With this revised engine, I have a feeling we'll be seeing a lot more 450-500whp stock block FI Z/G's out there. Should be fun!
I am starting to become convinced, that the rev-up engine is much stronger for FI than the non-rev up. We have a customer pushing close to 500whp on his rev-up, and he is literally beating the **** out of it....hasnt broken yet. With this revised engine, I have a feeling we'll be seeing a lot more 450-500whp stock block FI Z/G's out there. Should be fun!
s2000's have 11:1 CR and can take boost just fine. My buddy is making 400whp in his with stock block. Thats 400whp in a 2.2Liter 
Nothing like forged internals....Did I read the new HR will be all forged as well?
Nothing like forged internals....Did I read the new HR will be all forged as well?
Originally Posted by 300zxSteve
s2000's have 11:1 CR and can take boost just fine. My buddy is making 400whp in his with stock block. Thats 400whp in a 2.2Liter
Nothing like forged internals....Did I read the new HR will be all forged as well?
Nothing like forged internals....Did I read the new HR will be all forged as well?
Registered User
Joined: Dec 2003
Posts: 1,602
Likes: 0
From: Midland, TX
Originally Posted by MIAPLAYA
Another good article here: http://www.nissanperformancemag.com/september06/vq35hr/
Registered User
Joined: Jul 2004
Posts: 332
Likes: 1
From: South Fla.
Originally Posted by Wired 24/7
I get that the internals are stronger, the heads are better, etc. But what about the compression ratio increase? Will that make going FI a nightmare? Especially for guys that can only get 91oct?
Originally Posted by G35 6MT
I would agree that any engineering to make the block stronger has to be good for FI. The question I am wondering is the new block design going to be the best choice for engine rebuilds when going FI and is the block backwards compatible to installing the redesigned block into a early model car? All sorts of things come to mind like, front timing cover, cam timing, water and oil pumps, cam timing etc.
No one has the answers yet, but I think it's worth checking out in the future.
No one has the answers yet, but I think it's worth checking out in the future.
Any shops interested in a test car?
Originally Posted by S1AMEZE
I wonder if anyone's interested in trying this??? VQ35HR in a current Z/G chassis. At first, the cost of R&D would be sky high, but the payoff if you could package something brutal might be worth it.
Any shops interested in a test car?
Any shops interested in a test car?
Thread Starter
Registered User
Joined: Apr 2003
Posts: 1,756
Likes: 0
From: Houston
This motor should bring back some of the traits that was so well loved in the VQ30DE that was lost in the VQ35DE. The old VQ30De was a lil monster for its time. Stock, the Maximas could push 500 fwhp!!
I think this new motor is Nissans way of saying ... hmm the first batch of cookies didnt come out perfect. Lets shoot for a second. There are a host of improvments made, id like to hear some opinions from everyone. IMO the larger journal bearings and the larger ladder frame will greatly improove the smoothness of the new engine. This alone will greatly enchance the longevity of both built and stock FI motors. All the improvments to the heads and cams are always welcomed. Thats just more free HP for the guys that dont want to spend $2-8 k in head work and/or cams. Sure the compression ratio has been increased, but the safety margin has probably not change significantly. With the extra crank sensors, quench pads, and knock sensors, the higher compression for the most part is just more free HP for the FI group as well. The only thing thats has me split is the lengthening of the stroke. There are of course goods and bads to this. The major disadvantage, especially for stock block FI, is the rod will be more prone to bending if Nissan doesnt signifigantly improve the QC and build on these rods. Unless they greatly improove on the rods, the new motor IMO will still be limited to the 400-500 rwhp range. The longer stroke has left us with more sleeve thickness, more surface contact with the head gasket, and hopefully a stock sleeve thats less prone to shifting or becoming oval under loads. The longer stroke should put less stress on the sleeves as well, another plus for us stock sleeve FI guys!
I didnt want to link this thread into the FI section, even though i think its worth just as much there as it is here, for fear a mod will just move it back. I think some of the FI guys dont come out enough to see this thread.
Come on guys... this is HUGE!!! Lets hear more on what you all think this is going to do to the VQ modders out there. This is easily the biggest news to come out for the VQ community.
I think this new motor is Nissans way of saying ... hmm the first batch of cookies didnt come out perfect. Lets shoot for a second. There are a host of improvments made, id like to hear some opinions from everyone. IMO the larger journal bearings and the larger ladder frame will greatly improove the smoothness of the new engine. This alone will greatly enchance the longevity of both built and stock FI motors. All the improvments to the heads and cams are always welcomed. Thats just more free HP for the guys that dont want to spend $2-8 k in head work and/or cams. Sure the compression ratio has been increased, but the safety margin has probably not change significantly. With the extra crank sensors, quench pads, and knock sensors, the higher compression for the most part is just more free HP for the FI group as well. The only thing thats has me split is the lengthening of the stroke. There are of course goods and bads to this. The major disadvantage, especially for stock block FI, is the rod will be more prone to bending if Nissan doesnt signifigantly improve the QC and build on these rods. Unless they greatly improove on the rods, the new motor IMO will still be limited to the 400-500 rwhp range. The longer stroke has left us with more sleeve thickness, more surface contact with the head gasket, and hopefully a stock sleeve thats less prone to shifting or becoming oval under loads. The longer stroke should put less stress on the sleeves as well, another plus for us stock sleeve FI guys!
I didnt want to link this thread into the FI section, even though i think its worth just as much there as it is here, for fear a mod will just move it back. I think some of the FI guys dont come out enough to see this thread.
Come on guys... this is HUGE!!! Lets hear more on what you all think this is going to do to the VQ modders out there. This is easily the biggest news to come out for the VQ community.
Looking at this pic, it looks like there will be less force on the rod. So i would assume it would not bend as easy since the angle has been reduced. But then again, im no engine builder 
Later
Aceman
Later
Aceman
