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12-21-2004, 07:11 PM | #46 | ||
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Re: New 240SX and GT-R
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how do you figure? in an I-6 the cams would be twice as long, still the same mass, you would still have the same amount of valves, rockers, springs, what have you valvetrain parts.... I would agree that the timing system is more complex |
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12-21-2004, 07:14 PM | #47 | |
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Re: New 240SX and GT-R
You can't put a big single turbo (well you can, but it's fucking hard) on a V6, it's easy on a I6. Manual means you do it yourself, automatic means it's done for you, in a standard tranny you do everything yourself, in any other tranny, it's done for you, by the computer, it's not manual, it's automatic.
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12-24-2004, 02:49 PM | #48 | ||
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Re: Re: New 240SX and GT-R
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Edit pt. 1: And also, come to think of it, the part in italics is nearly a mute point... However, despite being DOHC, a V6 actually has 4 cams. Think of the V6 as a whole unit, so it's 6 cylinders pushing 4 cams [assuming 4 valves per cylinder] operating 24 valves, where as an I6 is 6 cylinders pushing 2 cams operating 24 valves. That's why an I6 still ends up with a better valvetrain. However, that's all theory; the practical difference ends up being small if both engines output the same amount of power and weigh nearly the same. Edit pt. 2: ...because the cams on the V6 would be shorter, because each cam operates 6 valves on a V6, on an I6, one cam operates 12 valves. It's 4x6 vs. 2x12, so having 4 cams on a V6 actaully means little. This leaves the only real advantages of the I6 in balancing and weight and less complexity of the valve train. Last edited by phoenix_fire180SX; 12-25-2004 at 10:12 PM. Reason: Thinking... |
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12-24-2004, 03:24 PM | #49 | ||||||
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Re: Re: New 240SX and GT-R
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Plus you don't seem to know that their is more difference between a manual transmission and an automatic than just if the driver has control over the shifting. A true manual transmission is lighter and transfers more power to the wheels because they transfer power from the engine more efficiently. I won't go into too much detail, but an automatic uses a different planetary-gear based system that weighs more and transfers power less efficiently from the engine because it uses a torque converter which uses hydraulic fluid. So the definition of a manual transmission and an automatic transmission is more than just how much control the driver has over gear shifting, they are fundamentally different designs. Manual transmissions are, without a doubt, superior for performance, so I'll agree with you that an automatic Skyline GT-R would be horrible, but you shouldn't call a sequential gear box transmission an automatic; it's much more like a stick shift manual transmission then an automatic like most everyone's grandma drives. |
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12-24-2004, 04:57 PM | #50 | |
240SX Guy
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Re: New 240SX and GT-R
Twins are not more efficient. They spool much faster than a single turbo. They are used on factory cars so you don't expirience much lag. Makes it feel more like a NA engine.lol Thats why a lot of your big-time supra and skyline tuners switch over to a single turbo. If I was rich, I would probably have a sequential shift car somewhere in my garage, but until then....
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-Cory 1992 Nissan 240sx KA24DE-Turbo: The Showcar Stock internals. Daily driven. 12.6@122mph 496whp/436wtq at 25psi |
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12-24-2004, 10:18 PM | #51 | |
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Re: New 240SX and GT-R
Pheonix Fire, I know about the trannies, how a manual puts down more power and how autos are smoother or whatnot, but thebottom line is, it's not a standard without the clutch, it might not be an automatic, but it's defenetely not a manual, it's in between, and you can't make 1000hp with a twin turbo setup on a 2JZ or RB26, but you can with a single turbo, that's why I brought it up, I know it's more efficient 2 have 2.
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12-24-2004, 10:42 PM | #52 | |
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Re: New 240SX and GT-R
i like turbo lag then surge!!! feels great!
Her: when will go fast? Me: wait............its not past 3500 yet... Her: whatev OH SHIT! Me: Oh yeah! Car: VROOOOOOMMMM WHISSSHT
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12-24-2004, 10:54 PM | #53 | |
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Re: New 240SX and GT-R
wait, wait, i dont think there is any way the auto is near as quick as manual on the luanch of a drag race. in the streets the luanch is the most important part of the race becuase once u hit the next light its done, like it or not
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12-24-2004, 11:18 PM | #54 | |
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you don't know too much then....
automatics can have more launch consistency thereby allowing you to find the optimal launch technique for the fastest time.. if you have to manipulat the throttle and clutch pedal at the same time...no 2 launches will be the same, because you do not control when the power is put down to the ground in an auto, it is done for you.. you can change parts to get different launch rpm's; with the manual you can always mess up a launch if your feet do not work as planned.. hey it might seem easy to drive a manual on the street but do 100 drag races on the strip and you will see just how inconsistent it is... So at the very least the average times for an automatic will be higher... |
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12-25-2004, 11:08 AM | #55 | |||||
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Re: New 240SX and GT-R
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The RB's been dead for over two years. Get over it already. The VQ can be stronger, will produce more torque, and be lighter, all while offering the lower emissions that the RB isn't capable of.
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12-25-2004, 11:59 AM | #56 | |
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well said, you would think half the nissan followers think the rb is the only engine in the world capable of making over 600hp
the other half are smart the rb was a cool engine, but its gone... its not the only engine you can make loads of power with. Id rather have a big block chevy 427 over a rb26dett.......also don't forget the vq35 only has .9 of a liter higher in displacement, that can make a big difference when talking modified engines. |
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12-25-2004, 08:28 PM | #57 | ||
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Re: Re: New 240SX and GT-R
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When tuning is finished its said to have breached the 1000hp mark!! pretty awesome..
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12-25-2004, 09:00 PM | #58 | |
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damn thats a nice engine bay
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this 240 is just so damn sexy! ~Environmentalists love drifting~ |
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12-25-2004, 09:41 PM | #59 | |||
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Re: New 240SX and GT-R
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12-25-2004, 09:55 PM | #60 | ||
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Re: Re: New 240SX and GT-R
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Although, yes, ultimately, most race cars end up with one large single turbo simply because it's not practical to keep the complexity and extra space required for a twin turbo setup of similar power (we're talking those huge 800+ HP cars). But it is possible; anything is with the right amount of $$$. |
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