I Thought Vq Engines Were Hard To Turbo?

[lingeringsoul]

Having watched one too many BMI videos and knowing most of the tuned Z33s are still in NA form, I've heard numerous internet gurus saying how unresponsive the VQ engines are to turbos. This brings me to question Nissan as to how they manage to extract 380kw out of the VQ engine for the new GTR. I mean, would an extra 0.3L of displacement and twin turbo be enough to extra 180kw out of the engine? or have they completely redesigned the engine? I know that some have tried to turbo a Z33 engine but only managed a small gain in power.

[scathing]

Not entirely true. Where did you hear it from?

For starters, the GT500 cars run VQ30DETTs, and they do OK so there's no issue with the block itself.

The VQ35DE's biggest problem is its softer-than-shit bottom end. It'll only reliably make around 300rwkW - push it harder and you'll eventually snap a rod. Of course, since the engines only exist in NA guise the OEM fuel system needs to be replaced too, but that's to be expected.

That said, if you keep it under 300rwkW the VQ is fine. The standard APS TT uses a pair of GT2871R's blowing 7psi to make around 280rwkW, which isn't too shabby considering its practically lag free. To put it in perspective, a stock 350Z will make around 155rwkW.

I know a couple of daily driven TT 350Z's with unopened engines, and they've had no dramas. The only one I'm aware of that's blown up was one that had been boosted to 320rwkW.

As for what the VQ will handle if you do build it up, how about a "streetable" 550rwkW?

As for what the VQ will do if you go all out and forget street use, apparently this drag 350Z runs a VQ block, and makes 1800hp (from sources not in the comments field of that YouTube page).

The estimates I've seen in car magazines is that they think the GT-R will have around 330kW - which given what an aftermarket TT kit will do the engine is way too low in my opinion. You'd think with the extra displacement, FI bottom end, and all that R&D they would squeeze out 400kW+.

Edited January 3, 2007 by scathing

[N1GTR]

The estimates I've seen in car magazines is that they think the GT-R will have around 330kW - which given what an aftermarket TT kit will do the engine is way too low in my opinion. You'd think with the extra displacement, FI bottom end, and all that R&D they would squeeze out 400kW+.

Even if they dont, someone else will make the kit aftermarket

[RellikZephyr]

even so is it CONFIRMED that its actually a VQ in the new gtr

or some steroid fed hybrid? or some completely new engine?

just cause its a 3.8L V6 doesnt mean its a bored out VQ

actually speaking of which...Has any indepth specs been released on the new GTR??

are there any pics of the interior yet??

RellikZephyr

[Smurf]

Quote

"Even if they dont, someone else will make the kit aftermarket"

I think nissan needs to come out with 400kw+ to stop so many people out there commenting on how overrated gtr's are. I don't think Nissan will though I believe they should.

also by the time it hits the market, 330 to 370kw won't be in the ball park of the latest euro super cars, including m5, 911 turbo etc. These cars have been making this power for some time and will continue to produce more and more power.

By then they will producing this in the locally made HSV's so will have to continue to take the bogan abuse.

Unless they can make it a nible handler or come out with something amazing, I imagine it will fail to impress. If they could produce twice the power of a 350z with similar balance of a 350z plus 4wd, that will impress.

I'm hoping for the best though have a suspision I will be disappointed.

Just my thoughts.

[N1GTR]

Quote

"Even if they dont, someone else will make the kit aftermarket"

I think nissan needs to come out with 400kw+ to stop so many people out there commenting on how overrated gtr's are. I don't think Nissan will though I believe they should.

also by the time it hits the market, 330 to 370kw won't be in the ball park of the latest euro super cars, including m5, 911 turbo etc. These cars have been making this power for some time and will continue to produce more and more power.

By then they will producing this in the locally made HSV's so will have to continue to take the bogan abuse.

Unless they can make it a nible handler or come out with something amazing, I imagine it will fail to impress. If they could produce twice the power of a 350z with similar balance of a 350z plus 4wd, that will impress.

I'm hoping for the best though have a suspision I will be disappointed.

Just my thoughts.

VERY valid points

One more ill throw into the mix: If the new one comes with 330kw or 370kw, even a lot of the R32, R33 and R34's out there currently will be faster (well, by faster i mean have more power) - and thats before the German cars even get a look in

[someonestolecc]

As for what the VQ will handle if you do build it up, how about a "streetable" 550rwkW?

Is it strange their waste gate return pipe is welded at a right angle?

[predator]

it won't be a VQ.. it'll be a VQxxVH lots of changes have been made to improve the VQ.. a lot of them to allow higher revs and no doubt support a powerful turbo setup. 350kw in stock form is my guess.. With the scope for a few nismo tuner models pushing out 450kw, etc..

[DR30RULES]

Having watched one too many BMI videos and knowing most of the tuned Z33s are still in NA form, I've heard numerous internet gurus saying how unresponsive the VQ engines are to turbos. This brings me to question Nissan as to how they manage to extract 380kw out of the VQ engine for the new GTR. I mean, would an extra 0.3L of displacement and twin turbo be enough to extra 180kw out of the engine? or have they completely redesigned the engine? I know that some have tried to turbo a Z33 engine but only managed a small gain in power.

Think there are some people out there who might disagree the this.

http://forums.freshalloy.com/showthread.php?t=159347

And I think this is not the VQ35HR which apparently has a stronger bottom end.

Cheers

[scathing]

And I think this is not the VQ35HR which apparently has a stronger bottom end.

The VQ35HR has only been on the market for a few months, so I very much doubt it too.

[Munna1]

It responds well to turboing but there is not alot you can do to get more out of it if you keep it in NA form. Overall it has plenty of potential but mods are very expensive.

http://nissanskyline.6te.net/tuning_350GT.htm

cheers

[scathing]

The mods are dropping down in price as the cars become more common, and tuners get behind the engine.

When I got my Z33, it was pretty much the first time that engine had appeared in a sports car. There was nothing on the market for it internationally, and what was there cost an arm and a leg.

To put it in perspective, buying a HiTech / APS catback cost just under $2000 back then. A Fujitsubo SS was around $2700. And these were practically the only two on the market (aside from some US-made ones which would also have cost around AUD$2K landed), aside from titanium exhausts which were around $4000. JDM and US extractors were about AUD$1500 landed.

These days I can get a Buddy Club catback for $1600 and JDM extractors for around $1000 (or UAS ones for $600).

Munna - do you run that site? Do you have any data on the existance of a PowerFC for the VQ35DE? So far the only bespoke engine management systems I've found are the Unichip, TurboXS UTEC, HKS FConPro V and some American ones.

[Munna1]

Munna - do you run that site? Do you have any data on the existance of a PowerFC for the VQ35DE? So far the only bespoke engine management systems I've found are the Unichip, TurboXS UTEC, HKS FConPro V and some American ones.

Yes, and my apology's as I am not sure of the existance of a power FC for a VQ ill have to edit that page.

cheers

[scathing]

Damn. I was hoping to get a PowerFC.

The UTEC seems to be the best bet at the moment, although I am quite happy with my Unichip.

[scathing]

EDIT: Link already posted.

Edited February 19, 2007 by scathing

[Absent]

Its not like Nissan would've grabbed some VQ35DEs chucked on some turbos aftermarket style and bored them out. The engineers would've completly redesigned the engine, its been spotted all over the US driving around while engineers log info on the engine and improve it. They test it for reliability buy literally sitting them on the rev limiter until they blow, seeing what failed first and upgrading it.

The main point is will it be better than the RB26? and stock it will almost put out twice the power

[pixel8r]

As a bit of a RB vs VQ example, you could compare the Stagea S2/R34 engine RB25DET (neo) with the Stagea S3 engine VQ25DET.

The RB25DET (neo) puts out 206kw and has 333N-m of torque (343 in the R34 skyline i think).

The VQ25DET puts out 206kw (could be more?) and has 400N-m of torque. Thats quite a jump.

There are a number of differences, the major one being completely different engine design, with the VQ being a V6 as opposed to the RB which is a straight 6.

This is the only current factory turbo'd VQ engine I'm aware of. I'd say its definitely possible to turbo a VQ engine and with good results, but like others mentioned there are few aftermarket options for it.

I'm looking forward to the official power figures of the new GTR and I also wonder if the performance potential will be as great as with the current line-up of GTRs.

[scathing]

There's a factory VQ30DET out there, according to my service manual.

[Absent]

VQ30DET

199kW at 6000 rpm and 368Nm at 3600 rpm, more of a luxury car engine should put one in my 32 gtst

[RRob]

Heres a pic of mine.

Some details...

To4z

SM4

Big fuel system

Stock internal's

Edited February 25, 2007 by RR 84 WA