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Updated - Buying a 2012 Nissan GT-R - ETA - This Week

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crazySOB297 said:
Tuning boosted cars is fun. My Sky Redline was 260/260hp stock, and that's not to the wheels. It was in excess of 300whp and 400wlb.ft with all the tuning before the physical mods.
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All this tune talk has me to ask if i go with a conservative tune. What possibly will i have to break? Isn't the motor forged from the factory?
 
Castiel said:
All this tune talk has me to ask if i go with a conservative tune. What possibly will i have to break? Isn't the motor forged from the factory?
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A stage 1 accessport tune would be significantly safer than just running these mods freely. Cobb makes these tunes fairly conservative so as to not blow up lots of engines (of course it could always be somehow possible).

Still I would suggest waiting until after the breakin. Heck, you won't really be able to get any benefit from the mods until you can really open it up anyway. And if anything is going to go wrong with the car early in life, thats the period I would have my attention on.
 
crazySOB297 said:
Probably because I tune cars. If your ECU says that it's going to make x boost at y RPM, no matter how many physical changes you throw at it, it's going to make x boost at y RPM or throw a code.

For example, the stock PCM in the Ecotec LNF (which is made by Bosch) will not let the car gain more than about 10whp before it starts to learn it's way back down. The first run on the dyno after you switch the hardware may show a 25whp gain. Come back a week later and it'll be closer to 5-10whp and the turbo spool will be back closer to stock. Also, once you've hit the peak of the stock tune, by say adding an exhaust, any other new hardware won't change the power at all. Manufacturers do this to protect the drivetrain, especially in cars like the GT-R. Without a tune you're seriously wasting your money.

Most likely, on the GT-R at least, in stock form the car's flow capabilities can already surpass both his filter and downpipe, but the PCM is holding it back.



Armchair my ass, ask Apex if you don't believe us. He'll show dyno charts to back it up (especially if they still have some LNF dyno charts laying around).
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I added 30hp to my WRX by mild exhaust mods and a very mild intake mod. Dyno proven. One size does not fit all when it comes too tuning, turbo or not.
 
Demo24 said:
I thought you lived in Jersey, in that case you're going to have to undo these mods everytime you go in for emissions testing/inspection. AND I guarantee you no Nissan dealer is going to warranty your car for engine or transmission faults with these mods on. Deleting a federally mandated item on your car not only ='s felony, but is tuned in.

Either way, you are going to throw codes when you do this. To get rid of the codes your going to have to mess with the ECU somehow, and im not even sure on the GTR you can just turn the light off for the o2 readings. Since the rear o2 sensors are going to be out of whack, badly, you've also a chance of throwing it into limp mode or doing damage depending on how the ECU handles this.

You can get away with an intake, but if your going full exhaust route at least get yourself a accessport

http://www.cobbtuning.com/categories/?id=3848
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the ecu can likely easily be tricked with something as simple as a set of nonfoulers... basically spacing the rear o2's out from the main stream of exhaust...
 
DivideBYZero said:
I added 30hp to my WRX by mild exhaust mods and a very mild intake mod. Dyno proven. One size does not fit all when it comes too tuning, turbo or not.
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I have specifically not mentioned subaru because their ECUs work in a fundamentally different manner than most new GTDI motors which I have been talking about. That also holds true for older ECUs which did not directly have boost control.
 
My only question for Castiel is this, you're getting of the fastest street cars in the world by most measurable variables, why worry about mods right off the bat? I love making my car "mine" by modding and such, but with a car like that, I'm not fucking with it, similar to how I don't understand tuner Ferraris.
 
If you have to finance the GTR, then modding it is not a good idea. You realize, they can tell if it's been tuned as well, you can flash back to stock, but there is a log history in the ECU that can't be undone.

If you were to have a drive train problem while tuned, it's out of your pocket, given that parts are extremely expensive, I'd think twice.
 
bargetrav said:
If you have to finance the GTR, then modding it is not a good idea. You realize, they can tell if it's been tuned as well, you can flash back to stock, but there is a log history in the ECU that can't be undone.

If you were to have a drive train problem while tuned, it's out of your pocket, given that parts are extremely expensive, I'd think twice.
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This. I have heard even GM has the ability to tell how many times an ECU has been reflashed on the Duramax trucks, since people were tuning and breaking them then going in for warranty work. If GM is doing it, I'd say it's almost certain Nissan is on a car like the GT-R. I recall reading they even had a GPS to tell if you were at a track when your car broke if you brought it in for warranty work.
 
Demo24 said:
I thought you lived in Jersey, in that case you're going to have to undo these mods everytime you go in for emissions testing/inspection. AND I guarantee you no Nissan dealer is going to warranty your car for engine or transmission faults with these mods on. Deleting a federally mandated item on your car not only ='s felony, but is tuned in.

Either way, you are going to throw codes when you do this. To get rid of the codes your going to have to mess with the ECU somehow, and im not even sure on the GTR you can just turn the light off for the o2 readings. Since the rear o2 sensors are going to be out of whack, badly, you've also a chance of throwing it into limp mode or doing damage depending on how the ECU handles this.

You can get away with an intake, but if your going full exhaust route at least get yourself a accessport

http://www.cobbtuning.com/categories/?id=3848
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The way the front O2's will read will not change. The rear O2's only tell the ECU if the cat is working. An sparkplug anti-fouler is an easy solution to this.
 
I personally wouldn't suggest tuning it, as i was told by my dealer directly as i purchased mine, that "any issues with the engine that might have been caused by a tune of any kind will no be covered".

its a ton of BS, but i've got better things to do than to argue with someone. besides my 'racing' days are over, so tunes aren't that important to me anymore.
Sides if i ever try to sell mine in and how old iam, if the car was ever tuned the buyer will think i drove it like hell.
 
you can always buy a spare ecu if you are worried about the logging... not sure how feasible that is for the GTR, but when I had my 03 cobra that is exactly what I and many other people did. They were so cheap, ~100-200 bucks, and easy to swap in and out.

but like other people have said, it's probably not worth the hassle and trouble it can bring (not to mention it is just morally wrong... this didn't used to bother me... must be the whole getting older and responsible deal)
 
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Multiple good points guys. I saw 500awhp with a tune and other mods and caught the mod bug. The car is going to be an 11 second monster from the factory so im not sure why I want more.
 
Castiel said:
Multiple good points guys. I saw 500awhp with a tune and other mods and caught the mod bug. The car is going to be an 11 second monster from the factory so im not sure why I want more.
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I recommend not touching it. If you have the tuning bug then buy yourself a cheap project car to slowly work on over time..
 
Castiel said:
Multiple good points guys. I saw 500awhp with a tune and other mods and caught the mod bug. The car is going to be an 11 second monster from the factory so im not sure why I want more.
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you're a guy, and a car guy too. you always want MORE POWER <Tim Allen grunt>
 
Elganja said:
you can always buy a spare ecu if you are worried about the logging... not sure how feasible that is for the GTR, but when I had my 03 cobra that is exactly what I and many other people did. They were so cheap, ~100-200 bucks, and easy to swap in and out.

but like other people have said, it's probably not worth the hassle and trouble it can bring (not to mention it is just morally wrong... this didn't used to bother me... must be the whole getting older and responsible deal)
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Yup that's a pretty common practice, but honestly with all the computers in the GT-R they probably track even this in the BCM or something. Not to mention it would probably be difficult to get a second ECM for this car.
 
I've seen 3 of these in Minneapolis ... all on accident, while driving.

If you can afford it, get it. Once you get past 30k, people here typically bitch that you shouldn't do it.

Personally, i'd rather have an RS4 for some reason, haha.
 
Castiel said:
Multiple good points guys. I saw 500awhp with a tune and other mods and caught the mod bug. The car is going to be an 11 second monster from the factory so im not sure why I want more.
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Because it's 2011 and 11 seconds is the new 13 seconds :awe:
 
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