New Skyline R35 GTR engine

[VQuick]

And of course Nissan has just been listing power at 276hp. The R34 was making closer to 320hp, according to insiders. The upcoming Toyota 4000GT will definitely exceed the agreed limit too, with around 400hp.
Another thing to consider is that the normally aspirated VQ35DE in the 350Z already makes 287hp, according to Car and Driver. If you ask me, the only way for the GT-R to go is up.
Does that help any?

[Pennzoil GT-R]

yep that helps thanks. is the 4000gt the new supra?

[VQuick]

I've heard a lot of rumors. An old one was that the replacement would be a smaller, lighter car based on the Altezza/IS300 chassis. I don't know what the engine would have been.
The 4000GT will be based on a larger platform, and will probably be close in size to the previous JZA80 Supra. The engine is supposed to be a 4L verson of the Lexus V8 with around 400hp.
The next NSX will have something similar too. And I guess it'll finally have some torque. The Maxima makes more torque than the current NSX, for crying out loud.
It would be great if the GT-R got a version of the VK. There's been some speculation at the Freshalloy forum about a turbrocharged 3.5L version(like the CART engine) for better rev capability. It would really make for some good competition.

Another thing I forgot to mention before: Nissan has already tested the VQ35DETT in some of its JGTCC racing R34s. The VQ30DETT is about half the length of the RB26 so it can just about sit behind the front wheels. Essentially, this makes the R34 a mid-engine car, improving it's balance and handling. Because of the displacement increase, you also get a lot more torque.
But I know you just want to hear about the power, huh? At just 4000rpm, the engines were making over 480hp and 540+lb-ft of torque. Heck, a Viper only makes 490lb-ft, and it has a V10. Pretty nice, eh?

[Gonthrax]

Originally posted by VQuick

It would be great if the GT-R got a version of the VK. There's been some speculation at the Freshalloy forum about a turbrocharged 3.5L version(like the CART engine) for better rev capability. It would really make for some good competition.

Another thing I forgot to mention before: Nissan has already tested the VQ35DETT in some of its JGTCC racing R34s. The VQ30DETT is about half the length of the RB26 so it can just about sit behind the front wheels. Essentially, this makes the R34 a mid-engine car, improving it's balance and handling. Because of the displacement increase, you also get a lot more torque.
But I know you just want to hear about the power, huh? At just 4000rpm, the engines were making over 480hp and 540+lb-ft of torque. Heck, a Viper only makes 490lb-ft, and it has a V10. Pretty nice, eh?

My money is on a decendent of the Q45 V8, perhaps it's just wishfull thinking though. About the VQ, thats interesting that it can sit behind the front wheels, any idea what the weight distrib is on those cars?

[VQuick]

But I'm sure it's much better than with the RB. Think about it: You've got a lighter, shorter engine, and it's moved farther back in the engine bay. The engine bay(and the entire front end) on the next GT-R can be shorter than the R34's, and use less building material for the chassis.
So guess what? You end up not only saving weight from the lighter powerplant, but from a shorter and lighter front end. Additionally, the FM platform is already like a mid-engined car, so the weight distribution will be nearly perfect.
The problem with the previous GT-Rs was that they were too front-heavy. That's what made them understeer sometimes.

[Gonthrax]

Originally posted by VQuick
But I'm sure it's much better than with the RB. Think about it: You've got a lighter, shorter engine, and it's moved farther back in the engine bay. The engine bay(and the entire front end) on the next GT-R can be shorter than the R34's, and use less building material for the chassis.
So guess what? You end up not only saving weight from the lighter powerplant, but from a shorter and lighter front end. Additionally, the FM platform is already like a mid-engined car, so the weight distribution will be nearly perfect.
The problem with the previous GT-Rs was that they were too front-heavy. That's what made them understeer sometimes.

You do make an excelent point... The more I think about it the more I can adjust to the idea of a GTR without an RB. I suppose good things can only last for so long untill they are replaced with somthing better. Lets just hope the VQ is better From what I can gather the rest of the car seems to be in order, damn... now were to find some money

[Pennzoil GT-R]

just been lookin at a few japanese car sites, and the general consensus is that the new GTR will have one of the following 3 engines:

1) detuned R390 GT1 twin turbo V8 (this is less likely of the 3)
2) tuned version of 350Z's V6 twin turbo (in excess of 450hp)
3) supercharged 3.0 V6 (to meet emissions)

a supercharged engine has been spotted in a Nissan Stagea. The Stagea has always ran the same drivetrain as the GTRs. the Stagea has been thought of in Japan as a GTR station wagon. so the people in the know think that Nissan may be testing their new GTR in a Stagea bodyshell.

more info on this on www.apexjapan.com

[VQuick]

There is a new thread at FreshAlloy.com with a Japanese magazine talking about what could be the production GT-R. From the scanned magazine cover, it looks a lot like a mix of the G35 coupe's styling mixed with the GT-R concept.
Now for the bad news. The engine shown in the car was the supercharged VQ30DE. IMHO, that doesn't really look like a step in the right direction from a performance standpoint. Heck, the VQ30DE-powered Maximas with an aftermarket supercharger were only getting around 280-300whp at the most. That's good for a Maxima, but not for the GT-R. The tunability won't be very good, either. The only hope is that the compression ratio is lowered to 9:1 like the turbo factory VQs.

I'm hoping that the rumors about the U.S. and Japanese markets having different engines are true. If we can't get a turbocharged engine at all, it'd be nice to at least get a supercharged VQ35DE.

[Holyterror]

Hmmm... the GT-R powered by a VQ35DER? Never even crossed my mind. Maybe someone at Renault just discovered cocaine.

In all seriousness, the supercharged powerplant could be more powerful than we think. Saab's prototype variable-compression engine uses a supercharger that somehow cranks out 40 psi! If Nissan is developing anything like this, then screw the turbo. Remember, that's more than most ball bearing turbos deliver with NO LAG. Of course, Nissan may just stick us with an unimpressive Roots blower and tell us to get over it. Who knows.

One thing to remember about superchargers: you can change out pulleys in order to get more boost. This will of course reduce the lifespan of the s/c, but then again, when an s/c fails it doesn't trash your engine like a shredded turbo.

I like the Stagea. Compared to a Protege 5, it's beautiful. And I like the VQ25DET. I wonder how well it responded to the s/c.

Inevitably, I think that the search for real power is going to lead down a familiar road: swapping in an RB26. Only time will tell.

[VQuick]

Originally posted by Holyterror
Of course, Nissan may just stick us with an unimpressive Roots blower and tell us to get over it.

That's exactly what I'm worried about. The supercharged Maximas had a more efficient Centrifugal supercharger, and they are making in the 300whp range with 12psi.
With a Roots blower, the efficiency would be even worse. You'd need a pretty big blower to reach 12psi too. Who knows if it'd even fit in the engine bay? There wasn't room in the Maxima's engine bay for sure.

I guess I'm just stuck on turbos because of the good results with the factory applications.:shrugs shoulders:

[Gonthrax]

Originally posted by VQuick


That's exactly what I'm worried about. The supercharged Maximas had a more efficient Centrifugal supercharger, and they are making in the 300whp range with 12psi.
With a Roots blower, the efficiency would be even worse. You'd need a pretty big blower to reach 12psi too. Who knows if it'd even fit in the engine bay? There wasn't room in the Maxima's engine bay for sure.

I guess I'm just stuck on turbos because of the good results with the factory applications.:shrugs shoulders:

Well, if it is going to be a VQ, I suppose you can expect good results from turbocharging... It'll just cost more money what with the new parts you need to get compression and valve timing inline I think I'm going to go look at some high HP Zs to bolster my convidence in the engine

[VQuick]

What new parts are you talking about? If you're talking about lower compression pistons for the VQ30DE, you can get the JDM pistons for your U.S. market engine. Some of the Maxima guys are trying to do this, so that they can lower their ratio from 10:1 to 9:1. That will let them use more boost.
As for the valve timing, it shouldn't be a big deal with the VTC VQs. Since the timing changes are continuous, you probably won't have the problem that the VTEC Hondas did with the radically different profiles interfering with boost. They would either have the boost optimized for the small lobe, and have lame performance on VTEC, or would have the boost set to work best with the big lobe, and have bad performance off of VTEC.

Is this the kind of thing you were getting at?

[gtrsk8er]

but will these engines have the same tuning potential as the RB26dett. stock maybe, but can you get higher power out of a VQ as easy as you can out of an RB?:flash:

[VQuick]

You're not going to be able to get 1,000+hp out of the aluminum block, open-deck VQ like you will out of the iron block, closed-deck RB. The VQ still shouldn't be bad to work on, though. Otherwise, Blitz probably wouldn't even bother messing with the R35 Skyline.

However, the point in switching to the VQ is that it is a better balanced engine. The weight and dimensions of the VQ are smaller than the RB, so that a lot of weight can be saved. With the previous GT-Rs constantly gaining weight, the tuners had to increase power to make up for it. Using the VQ, you won't have to make so much power to go fast. Less weight also means you can(technically) use smaller brakes to slow you down. Less weight to bring to a stop, see? The lighter weight from using the VQ will also translate to better handling, something you can't improve by just turning up the boost.

The next GT-R will probably be something like the new 350Z. It won't be a total dominator, but it will be a great all-rounder car.

[Gonthrax]

Originally posted by VQuick
What new parts are you talking about? If you're talking about lower compression pistons for the VQ30DE, you can get the JDM pistons for your U.S. market engine. Some of the Maxima guys are trying to do this, so that they can lower their ratio from 10:1 to 9:1. That will let them use more boost.
As for the valve timing, it shouldn't be a big deal with the VTC VQs. Since the timing changes are continuous, you probably won't have the problem that the VTEC Hondas did with the radically different profiles interfering with boost. They would either have the boost optimized for the small lobe, and have lame performance on VTEC, or would have the boost set to work best with the big lobe, and have bad performance off of VTEC.

Is this the kind of thing you were getting at?

Yea thats the direction I was going, but I forgot that they had VVT, or VTC I suppose they like to call it