My moms Altima 2.5 surprises PLENTY of people with that CVT. It is crazy how smooth those are.

 

There is no shifting with a CVT, its just two belts connected to cone shaped things what ever you call them, so more or less one Gear but it changes the ratios, so its smooth as butter

 

The CVT is a very cool invention, they make the car seem like it's floating. Doesn't even seem like a machine anymore.

 

I stand corrected by the transmission weight. Thanks. Should have also included the gear ratios on top of the power loss. No argument that the gearings are shorter on the 6MT right?



For quicker acceleration you want shorter gearing not longer/deeper ones. I don't care if I can slam or not slam on the rev limiter, as long as it shifts after the powerband I'm set. And I have manually shifted the auto and yes it is slow as *****. Plenty quick? If you like to wait.

Can you please post the torque converter info? I'm sure most have seen the links already or know the times.

Link 1

1/4 mile, sec @ mph
14.68 @ 97.08 (5AT sedan)
14.23 @ 99.4 (6MT coupe) yes even though the coupe is heavier...

Auto G35 sedan that does 14.8

Link 2

Auto G35 sedan that does 14.7

Link 3

Manual G35 sedan that does 14.2

Link 4

Not able to find a consistent source to show the difference between manual vs auto 1/4 mile times but pretty close. You are only seeing the 10whp as a peak number and not the torque curve under. But if all things being equal, both cars automatic one with 260whp and another one with 270whp, the 270whp car will theoretically be faster by 0.2 seconds down the 1/4 mile.

 

What numbers did he post? The 10whp and the speculated 0.1 seconds? Get real, you know squat Following your posts confirms it. But feel free to post up your knowledge, I would like to hear them. Or unless you want DaveB to defend you. Next time I drive my G I'll make sure to shift 1000x slower so the manual transmission can catch up.

 

lol dude really, this is a known fact. A Computer can shift faster than somebody shifting. This is a fact in every single car on the road, the time taken for the car to go from the gear it in to full engage the next gear is FASTER than a human can possibly shift. You need to not only engage the clutch but then also shift then disengage.

Oh, and you know that 6mts and 5ats dyno with the same 230ish hp right? So if you're trying to use the age old stupidity of 10hp rice math for drivetrain loss, think again.

I am trying to to find the top 25 1/4 N/A list but it doesn't seem to be in the drag motorsports section anymore??? Anyone know where that went? Good portion of those were AT with the same mods as the 6mt counterparts.

 

I think this may bear mentioning in this thread: https://g35driver.com/forums/g35-sed...d-their-x.html

Also, on the topic of the CVT. I loved the smoothness of it in the Murano. The guy that had it had installed an InJen CAI with quite a long tube. It made really cool VQ noises. You can't really get the full effect from the video, but you can get the idea.

 

Really? So you are saying that if I had my hands on a manual (same year) G and I power shifted I would still be slower than your auto G? If you want we can setup a time at a track and prove each other's claims. Since we live quite a distance from each other I don't mind going on a mini vacation. Loser pays for my expenses, deal? I'd rather put my money where my mouth is.

F1 cars and the electronic controlled clutch cars (DSG/SMG etc) can shift faster than a person. If you comprehended my previous post you would have caught that. Or unless you don't know what electronic controlled dual clutch means

Show me on a same dyno and same condition where the 5AT and 6MT dyno the same. And please and I mean please figure out who mentioned the 10whp drivetrain loss first, I have not mentioned an exact figure FYI. IMO I don't think you should be calling DaveB's math rice, he might not like it.

The top 25 1/4 time is in the sticky of the motorsports... no searching needed. Which brings up another point for the 6MT, they generally have higher trap speed. Do you know what that usually means?

Next time I'll granny shift and be double clutching, gotta get faster times

 

how fast is the murano stock 0-60?

 

I don't really remember
I'll try to remember to ask Dennis (guy that had the Murano) if he remembers next time I talk to him.

Also, check it out, I found DaveB @ dragtimes.com

http://www.dragtimes.com/Infiniti-G3...slip-8756.html

 

I feel like I'm arguing on youtube.

 

 

Summin' it up hard

 

The gearing you posted is for the 07+ sedans with taller tires, much heavier weight, and the higher revving VQ35/37HR motors. They need the additional torque multiplication to get their heavy butts off the line and to sail through their lofty 7700rpm rev limit.

The term "deeper" gearing means shorter gearing. Deeper gearing can improve acceleration, but only to a point. It is possible to overgear a car and also cars that come undergeared will make larger jumps in acceleration when deeper gears are added. The G/Z, auto or 6MT, isn't one of those cars. It also very much the reason why these cars don't get exceptional MPGs. Nissan choose to go with performance gearsets in lieu of high mileage gear sets.

You're right, the manual shift mode isn't lightning quick, but you have to consider what's going on. You're doing next to nothing other than hitting the shifter to make the shift. The tranny must take your requested shift and process the data and excute the shift, hence the delay. Newer autos have gotten much quicker in this operation, but there is still a delay unless you're talking about the 8AT found in the Lexus IS-F which shifts faster than most any sequential manual on the market. With a 6MT, you've got a lot more going on. You've got to grasp the shifter, push in the clutch, move the shifter, manipulate the throttle, and release the clutch. Yes, you're in control, it's far from a faster process. You could powershift, but at best, it's going to net you .1 seconds in the 1/4 mile and at a huge risk to the already super weak clutch and syncros of the 6MT. When left in the auto mode, the 5AT will rip off very quick shifts with no delay. Most professional drivers couldn't match the shift speed, largely because the auto is behaving like a DSG tranny in that the next gear is already ready to go on the shift.

The mag times you posted a legit, especially the Motor Trend COY test of the 03 sedan. What's interesting is the first time out in my 03 sedan (Z-tube only, doesn't add any power), I saw a 14.69@96.8mph letting the tranny shift itself, which is how Motor Trend did it. On the next run, I manually shifted the 2-3 and held 3rd the entire run. The car did a 14.49@97.3mph that run. MT corrects their times for sea conditions and I was running in 1,400' air. My times would have corrected into the 14.3s@98mph. I ran again a few months later in sea level like conditions and with no changes and the car ran consistent low 14.3s/14.4s@98mph. The following spring and in 1,800' air, the car did a 14.35@99.8mph with the addition of a MD spacer. The corrected time would be in the low 14.2 range at 101ish.

My experience, as well as many other 5AT owners, is that these autos are just as quick as their 6MT counterparts in the 1/4 mile assuming the 5AT owner knows what they're doing. Yes, the 6MT will typically see higher traps which suggests high hp, but you're only talking about ~1mph difference. Street tire to street and mod and mod, it's going to be a driver's race. If the 6MT driver is exceptional, then I'd give the nod to the 6MT driver by a car length. However, I'd say 1 in 10, if that, 6MT drivers fit the exceptional category. The hardest thing about driving any manual at the strip is the launch. Getting a good 60' in a 6MT is hard and getting a good one in the auto is pretty easy because you can preload the drivetrain and reduce tire shock.

Now if we're talking all out drag racing where slicks are involved, the 6MT has the nod by a long shot unless the auto has basically an unstreetable 4000-4500rpm stall TC and a deeper gear set. With the 6MT, you simply rev up to 5500-6000rpms, say a prayer, and launch your way to a high 1.7/low 1.8 60'. That's a huge advantage.

With regards to the TC in the G/Z, it has a stall speed of around 2800-2900rpms. That's about 400 to 700rpms higher stall that you'll in other similiar V6 applications and is pretty high for any factory torque converter. It's also a pretty efficent TC with fairly low pumping losses hence the reason the 5AT only sucks out about 10whp/10wtq. As for the shape of the 5AT powerband, it's exactly like the 6MT, except the powerband is 10whp/10wtq lower at all points.

Finally, the new 7AT is turning out to be the acceleration choice in the G37 and 370Z. On average, these ideally geared autos are seeing solid .2 to .3 second faster ETs in the 1/4 mile both in the mags and by owners alike. It's just more proof that OEM autos have come a huge way in just the past 10 years. Mercedes' new auto that uses an elaborate clutch style device in lieu of a torque converter is proving to be the future on an automatic. Gone are the pumping losses and shift speeds are unmatched by any sequetial manual. Mark my word, it's the future of transmissions. Faster shift speeds, far less complicated and cheaper than a sequential manual, lighter, and great driveability. There's still no substitute for a good driving manual (the manual in the G/Z isn't one of them), but if you care about all out performance, the playing field is pretty much level now and is starting to lean towards the auto side of things.

 

^well said. Auto FTGDMFW