70mph = 3000rpm 5th gear?
01-22-2005, 03:38 AM
#3
Senior Member
Join Date: Nov 2000
Posts: 3,883
Originally Posted by Igobuk
Yeah, that's about right. Almost makes 5th gear pointless with such high rpm's.
My wife's Odyssey is at 1900rpm's at 70 and it's a 4 speed auto.
My wife's Odyssey is at 1900rpm's at 70 and it's a 4 speed auto.
I'm oversimplifying but just like anything else there is a trade-off between acceleration and final drive, which translates to fuel economy and top speed. Put it this way, I don't want the Maxima to be any slower, it's not that fast to begin with! Nor do I need more than 28.5 mpg which is what my 7 yr. old SE did last weekend. So the 4th gen 5-spd is about right. I know it's hard to believe, but Nissan doesn't do everything wrong!
01-22-2005, 09:27 AM
#7
Originally Posted by Frank Fontaine
I guess you've never driven a German car then? Hyundai is also in the low to mid 2's at 70 with an auto, so I that also makes the Maxima pointless? It's the ratio that's important. German cars used to be 1:1 in 5th gear. Now that they have gone to the 6-spd they actually do have something like .83 in 6th, unlike the past. I don't even think Nissan tells you gear ratios on their website because their clients are to put it mildly not that sophisticated. To put an even lower ratio on the 5th gear would be like playing a fuel economy game with the EPA, but it would make no sense from an engineering standpoint. More gears (like 6-spd manual or 7-spd autos) means you spread the ratios out, not that you put lower and lower ratios for the high gears.
I'm oversimplifying but just like anything else there is a trade-off between acceleration and final drive, which translates to fuel economy and top speed. Put it this way, I don't want the Maxima to be any slower, it's not that fast to begin with! Nor do I need more than 28.5 mpg which is what my 7 yr. old SE did last weekend. So the 4th gen 5-spd is about right. I know it's hard to believe, but Nissan doesn't do everything wrong!
I'm oversimplifying but just like anything else there is a trade-off between acceleration and final drive, which translates to fuel economy and top speed. Put it this way, I don't want the Maxima to be any slower, it's not that fast to begin with! Nor do I need more than 28.5 mpg which is what my 7 yr. old SE did last weekend. So the 4th gen 5-spd is about right. I know it's hard to believe, but Nissan doesn't do everything wrong!
01-22-2005, 07:19 PM
#12
That's probably about right for an auto. Remember you only have 4 gears. OD is not a direct link like 5th in the manual is, so you can be at quite a low RPM.
Exit, I wouldn't worry about it. Really the only reason I can think of for it to be too high is if your clutch was slipping all the time...even that seems pretty far fetched, especially without you noticing on takeoffs etc. I could of course be wrong, but it seems that with a direct mechanical connection as found in manual trannies there isn't much that could make it be at the wrong RPM.
Exit, I wouldn't worry about it. Really the only reason I can think of for it to be too high is if your clutch was slipping all the time...even that seems pretty far fetched, especially without you noticing on takeoffs etc. I could of course be wrong, but it seems that with a direct mechanical connection as found in manual trannies there isn't much that could make it be at the wrong RPM.
01-22-2005, 09:16 PM
#13
Originally Posted by Frank Fontaine
I guess you've never driven a German car then? Hyundai is also in the low to mid 2's at 70 with an auto, so I that also makes the Maxima pointless? It's the ratio that's important. German cars used to be 1:1 in 5th gear. Now that they have gone to the 6-spd they actually do have something like .83 in 6th, unlike the past. I don't even think Nissan tells you gear ratios on their website because their clients are to put it mildly not that sophisticated. To put an even lower ratio on the 5th gear would be like playing a fuel economy game with the EPA, but it would make no sense from an engineering standpoint. More gears (like 6-spd manual or 7-spd autos) means you spread the ratios out, not that you put lower and lower ratios for the high gears.
I'm oversimplifying but just like anything else there is a trade-off between acceleration and final drive, which translates to fuel economy and top speed. Put it this way, I don't want the Maxima to be any slower, it's not that fast to begin with! Nor do I need more than 28.5 mpg which is what my 7 yr. old SE did last weekend. So the 4th gen 5-spd is about right. I know it's hard to believe, but Nissan doesn't do everything wrong!
I'm oversimplifying but just like anything else there is a trade-off between acceleration and final drive, which translates to fuel economy and top speed. Put it this way, I don't want the Maxima to be any slower, it's not that fast to begin with! Nor do I need more than 28.5 mpg which is what my 7 yr. old SE did last weekend. So the 4th gen 5-spd is about right. I know it's hard to believe, but Nissan doesn't do everything wrong!
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