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Old 09-11-2007, 01:30 PM   #1
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Post Under the hood of the Nissan GT-R: Engine details revealed

Filed under: Coupes, Sports/GTs, Japan, Tech, Tokyo Motor Show, Nissan


The upcoming Nissan GT-R is already a streetbound race car, but rather than just toss the tasty-enough VK V8 in the engine bay and call it a day, Nissan's going all out with an engine befitting an actual racer. The VK45 was rumored to be the engine for the GT-R, but Nissan felt its overall style was more Grand Touring than was appropriate, so they reached back into history and pulled out a little number from the R390 LeMans racer.

Follow the jump for the story. Thanks to Chuck for the tip!

[Source: 7Tune]Continue reading Under the hood of the Nissan GT-R: Engine details revealed
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Old 09-11-2007, 01:36 PM   #2
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Here's the rest of the story if you don't want to click on the link:

The R390 sported a 3.5 liter V8 known as the VRH35L, which was essentially recreated as a V6 production engine in the form of the upcoming GT-R's VR38VETT. Even though it loses two cylinders, it gains 300cc of displacement, for a total of 3.8 liters. Oh yeah, there's a couple of turbochargers thrown in for good measure, too. Despite the amount of air it can pump, the VR38 is a compact mill with lots of trick touches. Among the most interesting features, and probably the ones that tuners will hate the most, are the integrated turbine housings in the exhaust manifolds. Having the impellers right in the manifold keeps weight down and improves response, while also making the overall package more compact and thus easier to nestle down into the frame. Each cylinder bank has its own independent intake manifold, which is the main thing you see when lifting the hood. The cylinders fed by that plumbing are occupied by lightened pistons, which are in turn flung around by svelte connecting rods and crankshaft, too. Cosworth had a hand in engineering the engine, which has an alloy block with linerless bores, plenty of magnesium alloy pieces, an oiling system capable of coping with high g's, and an eagerness to rev in a way 3800ccs usually aren't.

The GT-R will be impressive when it debuts in just a couple of months, and from the numbers, it looks like it'll give a Porsche 911 Turbo quite a run for its (big pile of) money. The horsepower figure for both cars is 480ps, and while the GT-R gives up some torque to the Porsche, the GT-R rips off equally quick dashes to 100 km/h (3.9 seconds) and has been designed with vehicular balance as an overarching theme. While the chassis of the GT-R can handle more power, Nissan's considerable Group C racing experience showed that cars with better balance are faster than horsepower champs. With a front engine/AWD layout, it'll be less a widowmaker than the 911, which can get wiggly at times. How's this sound – performance equal to (and potentially better) than the 911 Turbo for half the price (7.9 million Yen versus 18.2 million Yen)? Yeah, we thought so. Besides, the GT-R isn't stuck in some kind of iconoclastic styling purgatory the way the 911 is.
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Old 09-11-2007, 01:44 PM   #3
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awe =(

when it said r390 I got way excited. Its way different if it has two less cylinders dangit!
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Old 09-13-2007, 01:15 AM   #4
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It just wouldnt be a gtr if it had 8 cylinders though. I am kinda pissed that they made it a V. Gay. inline ftmfw
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Old 09-13-2007, 07:46 AM   #5
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http://www.7tune.com/?p=106

That's the actual article, not just a regurgitated blog summary.
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Old 09-13-2007, 03:48 PM   #6
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wow it says it weighs 1750kg, i hope that's wrong
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Old 09-13-2007, 04:37 PM   #7
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Quote:
Originally Posted by jskateborders View Post
It just wouldnt be a gtr if it had 8 cylinders though. I am kinda pissed that they made it a V. Gay. inline ftmfw

thats a retarded statement. its like complaining the new m3 isn't an m3 because it needed a v8 to compete with todays sports cars. What must be done was done. you have better balance with a V6 motor than a I6. you gain better balance. blah blah blah. they need to release it already, and stick it in ALMS and Speed GT.
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Old 09-13-2007, 05:00 PM   #8
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yea I would of liked it to keep with tradition on the inline. but hey, they gotta do what they gotta do to make bank right
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Old 09-13-2007, 06:00 PM   #9
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wow 68gs is kind of alot
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Old 09-13-2007, 09:17 PM   #10
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Quote:
Originally Posted by jskateborders View Post
It just wouldnt be a gtr if it had 8 cylinders though. I am kinda pissed that they made it a V. Gay. inline ftmfw
if you dont own it or arent buying it, dont complain, ever
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Old 09-13-2007, 11:58 PM   #11
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Quote:
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yea I would of liked it to keep with tradition on the inline. but hey, they gotta do what they gotta do to make bank right
The RB series was a 18 year old design, by automotive standards thats like a 90 year old man. Nismo's engine of choice has been the VQ series since the beginning of this century. The 2004-2005 JGTC winning R34 GTR was powered by a VQDETT. The 3.5 VQ has already been tuned here in the States to a mind bending 1800HP!! The VQ38DETT sounds like a monster in its own right. Hell the G37 engine aka VQ37DE is a monster in the NA HP department coming in at 330 HP.
The VQ series is not to be scoffed at in any way shape or form!

P.S. the curb weight of that GTR is expected considering its 6 cylinder AWD car. 3850LBs is the converted number. With 500 HP with room to tune higher the car will still be a monster at that weight and given the fact that it lapped Nurmburgring at 1 second faster than a GT2 Carerra pretty much means its badass even at that weight.
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Old 09-14-2007, 12:05 AM   #12
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Quote:
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P.S. the curb weight of that GTR is expected considering its 6 cylinder AWD car. 3850LBs is the converted number. With 500 HP with room to tune higher the car will still be a monster at that weight and given the fact that it lapped Nurmburgring at 1 second faster than a GT2 Carerra pretty much means its badass even at that weight.
Yeah i understand that Dave and i sure as hell am not complaining, but imagine if they cut the wait down a few hundred pounds. It would be even more insane......
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Old 09-14-2007, 11:10 AM   #13
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Yeah i understand that Dave and i sure as hell am not complaining, but imagine if they cut the wait down a few hundred pounds. It would be even more insane......
Indeed it would be, Henry.
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Old 09-14-2007, 11:16 AM   #14
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