motor

Pokiou · 05-08-2008, 03:27 AM

GT-R tuning update: Amuse breaks 600 hp, tranny woes at MCR

With all the news surrounding the Nissan GT-R V-Spec, the progress on the Godzilla tuning front has been largely overlooked. According to a recent article in Japan's BestCar magazine, the Amuse team has broken the 600 hp mark (at the crank) with a combination of a high-flow exhaust and a tweaked ECU. There were no details on how the GT-R's computer was hacked, but Amuse was able to up the boost to 18 psi, resulting in an increase in output to 602.73 hp and 576.95 lb.-ft. of torque.

However, tuners are beginning to question how the stock gearbox will hold up under the strain of additional output. MCR, which brought out its GT-R for filming of Hot Version 93, has been exacting its own brand of punishment on its tuned GT-R and is worried how long the transmission will last. It's not clear if the tranny woes are due to the clutch plates or something else, but it's been all but confirmed that dual-clutch gearboxes have an issue with additional torque since the friction surface is much smaller than on a stock (read: single plate) clutch. MCR's best guesstimate is that the stock 'box might only be able to hold up to the additional power for 12 months before problems begin arise. Now, we're particularly interested in how Nissan is beefing up the tranny on the V-Spec to handle its rumored 600 hp.

yg60m · 05-08-2008, 04:34 AM

Thanks for the info. it really seems that the previous GT-R was much easier to tune ...

04RCSTI · 05-08-2008, 11:42 AM

I called it, did I not? To all of you that said "no, the engine is already high strung" eat that. 600HP on tuning alone (come on like exhaust gets more than 20HP). I'm sure it can handle more. Next step I see coming is 660-700 @ 20-21.

fordgt84 · 05-08-2008, 04:19 PM

Originally Posted by 04RCSTI

I called it, did I not? To all of you that said "no, the engine is already high strung" eat that. 600HP on tuning alone (come on like exhaust gets more than 20HP). I'm sure it can handle more. Next step I see coming is 660-700 @ 20-21.

no doubt i'm sure the engine could handle abit more muscle, but i'm still worried about the gearbox though...

79TA · 05-08-2008, 04:57 PM

Originally Posted by 04RCSTI

I called it, did I not? To all of you that said "no, the engine is already high strung" eat that. 600HP on tuning alone (come on like exhaust gets more than 20HP). I'm sure it can handle more. Next step I see coming is 660-700 @ 20-21.

If you're referring to me, you're equivocating with how the word "tune" was used.

Nissan has pushed the little 3.8 pretty far. I really doubt any big gains will be made with a tune by itself. Let's not forget that there's a slight possibility that it makes that much power already. (My guess as of now is something around 510 . . . with 15% drivetrain loss that would be about 434 to the wheels)

Like I everyone knows, more boost is always an option for more power.

Like I said, not much will come from a tune alone. Some sort of mod combined with a tune is a different story. If an owner wants to be a little braver with boost (or who knows what), I bet they could get much more just like you predicted.

rusrocket · 05-08-2008, 12:27 PM

I'm really skeptical of the tuning business for the GT-R. It seems like Nissan went through great effort to make all the drivetrain components work together as efficiently as possible and messing with the ECU disrupts the synchrony they created.

5vz-fe · 05-08-2008, 12:51 PM

It will always be tunable to a certain degree or else it will be a slap in the face for Nismo.

RC45 · 05-08-2008, 05:05 PM

600bhp?

*yawn*

Wake me when they get 600 to the wheels.

A 600bhp beached whale, is still a beached whale

pagani · 05-08-2008, 05:22 PM

Originally Posted by RC45

600bhp?

*yawn*

Wake me when they get 600 to the wheels.

A 600bhp beached whale, is still a beached whale

Soon

HeilSvenska · 05-08-2008, 05:26 PM

Originally Posted by pagani

Soon

They can always fit an LS3 in it to make it easier.

RC45 · 05-08-2008, 07:46 PM

Originally Posted by HeilSvenska

They can always fit an LS3 in it to make it easier.

Yeah - and that's way before you need to boost it as well....

Pokiou · 05-08-2008, 06:59 PM

Originally Posted by RC45

600bhp?

*yawn*

Wake me when they get 600 to the wheels.

A 600bhp beached whale, is still a beached whale

LOL.. you banana

04RCSTI · 05-08-2008, 08:10 PM

I wasnt talking about you RC, i was talking in general because a few people said that it wasnt going to make much more power since it was high strung already.

You guys cannot be serious about the LS3 thing lol.

As far as the tranny goes, I think it should be able to hold 600 but I'd guess that its near the limit considering its 120hp up from what its usually at. I'd say that the tranny cant hold more than 650 without modifications of some sort...

HeilSvenska · 05-08-2008, 08:14 PM

Originally Posted by 04RCSTI

You guys cannot be serious about the LS3 thing lol.

What's wrong with the LS3? GM LS engines are some of the most flexible engines available. LS3 produces 430hp @ 4400rpm in the new Corvettes. You fit that engine with a twin turbo. 600hp? No problem.

The VR38DETT makes 480hp @ 6400rpm. I'm simply saying that it'll be easier and faster to make 600hp with the LS3. Kind of a "duh/dur" kind of statement, but oh well.

04RCSTI · 05-08-2008, 08:21 PM

Originally Posted by HeilSvenska

What's wrong with the LS3? GM LS engines are some of the most flexible engines available. LS3 produces 430hp @ 4400rpm in the new Corvettes. You fit that engine with a twin turbo. 600hp? No problem.

Yes, if it were up to some of you every sports car should have an LS3. Want more power? LS3 with twin turbos. Want even more power? SLAP 4 TURBOS on that LS3.

In fact the veyron actually has two LS3's mounted in a W.

Oh no, we're about to ruin another thread. Im done with this ridiculous argument before it starts.