Legit 0-60 times for V6 Sedan? - Drive Accord Honda Forums | radio-pro.ru
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post #1 of 38 Old 09-18-2015, 06:24 PM Thread Starter
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Legit 0-60 times for V6 Sedan?

I've seen published times of 5.6 - to 6.3 for the v6 Sedan. I've also seen the Sport trim post a 0-60 time of 6.6.

I would imagine the 6/6 coupe would no doubt pull a 5.6 but the Sedan? I haven't really given it a try as I have less than 2k on my V6 Sedan.

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post #2 of 38 Old 09-19-2015, 07:46 PM
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It's more like low 6 seconds at sea level on a 75 degree day. More than a few discussions on how the 2013 AT models tested by the mags were than likely ringers. It doesn't seem to be so much with the engine output, but the transmission logic on the sedan shifts far too early to take advantage of the power in 1st and 2nd (mostly 1st). My guess is that Honda gave the magazines a car with a different, performance oriented, transmission computer program to allow for maximum acceleration vs trying to protect the AT from premature failure.


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post #3 of 38 Old 09-19-2015, 08:13 PM
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The coupe and the sedan are about the same. The Coupe actually is advertised to get less MPG at HW speeds, which I'm guessing means it's design is less areodynamic than the Sedan. If that's the case the Sedan will go faster. The AT shifts quick (and only three times) to get to 60 so the speed between the two is about the same. The lowest 0-60 I ever was able to do was 5.7 in my coupe. I measured it electronically via OBD.

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post #4 of 38 Old 09-19-2015, 08:25 PM
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5.6 seconds with only Takeda Short Ram intake, on a quarter mile drag strip. So, 5.6 bone stock is possible

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post #5 of 38 Old 09-19-2015, 08:57 PM Thread Starter
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i took a try tonight and I got 5.8 to 6.1. I do get wheelspin off the line that definitely doesn't help. Either way, what a difference it is from my 8th gen v6 Sedan. Night and day. Thanks for the input fellas. I should take it to Englishtown one of these days
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post #6 of 38 Old 09-19-2015, 09:01 PM
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Originally Posted by Chubz View Post
i took a try tonight and I got 5.8 to 6.1. I do get wheelspin off the line that definitely doesn't help. Either way, what a difference it is from my 8th gen v6 Sedan. Night and day. Thanks for the input fellas. I should take it to Englishtown one of these days
Let me know when you go. Englishtown was where I did my first run...


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post #7 of 38 Old 09-19-2015, 10:12 PM
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Quote:
Originally Posted by nayr14 View Post
The coupe and the sedan are about the same. The Coupe actually is advertised to get less MPG at HW speeds, which I'm guessing means it's design is less areodynamic than the Sedan. If that's the case the Sedan will go faster. The AT shifts quick (and only three times) to get to 60 so the speed between the two is about the same. The lowest 0-60 I ever was able to do was 5.7 in my coupe. I measured it electronically via OBD.
It's the gear ratio that reduces the mileage. It does help it perform better.

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post #8 of 38 Old 09-20-2015, 10:25 AM
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Originally Posted by ffearless View Post
It's the gear ratio that reduces the mileage. It does help it perform better.
No, the transmission ratios are the same between the Sedan and the Coupe V6 with the automatic transmission and the EPA HW MPG was rated at 2 more with the sedan even though the curb weight is higher than the coupe.

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post #9 of 38 Old 09-20-2015, 12:23 PM
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Quote:
Originally Posted by Chubz View Post
I've seen published times of 5.6 - to 6.3 for the v6 Sedan. I've also seen the Sport trim post a 0-60 time of 6.6.

I would imagine the 6/6 coupe would no doubt pull a 5.6 but the Sedan? I haven't really given it a try as I have less than 2k on my V6 Sedan.
Car magazines can be very misleading because they weather adjust all times. Car and Driver uses the most favorable assumptions (coldest temperature, driest air, highest air pressure). This means the times they report may not be times you can actually achieve in real life. (Odds are they did NOT get the times reported either.) Plus C&D admits to abusing test cars with brutal launches. They also test their cars on sticky tracks for the better 60-foot times. That is one reason they also state a 5-60 time for a more real life number.

Most stock V6-sedans go through the quarter at 14.3 to 14.4 seconds at 96-98 mph. That typically translates to a 5.8 second 0-60 time. C&Ds 5-60 time is 5.9 seconds.



Quote:
Originally Posted by nayr14 View Post
No, the transmission ratios are the same between the Sedan and the Coupe V6 with the automatic transmission and the EPA HW MPG was rated at 2 more with the sedan even though the curb weight is higher than the coupe.
With regard to coupe’s and sedan’s mpg differences, I suspect that is totally attributed to Honda’s belief that coupe owners will use the paddle shifters to override the computers “best economical choices,” even on the highway! The coupe is sort of penalized for human judgement just like the 6MT gets unfairly hammered.

According to this article, the Hybrid has a drag Coefficient of .29 and is “one tick better than base Accords,” which means the base Accord has a drag coefficient of .30.



In the past, Honda coupes have always been more aerodynamic than the sedans. But even a .01 to .02 improvement in Cd won't save anymore than 1hp to 1.5hp to maintain 70 mph. That would make the change in aerodynamics impossible to justify the 2 mpg difference between the coupe and sedan. And you stated, the coupe and sedan have identical gears ratios.
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post #10 of 38 Old 09-20-2015, 12:26 PM
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I honestly believe that the EPA tests cars equipped with paddle shifters differently and rates them lower than they deserve. Case in point, the last-gen Honda Fit. The base model with 5AT and no paddle shifters was rated 28/35, while the Sport 5AT with paddles was rated just 27/33. The Sport only weighed 40 lbs more and had 185/55R16 tires versus 175/65R15's on the base model. I seriously doubt that 40 lbs and an inch larger wheel diameter caused a 2 mpg drop in highway MPG.

The 2016 Accord I4/CVT coupes and the Sport CVT share the same MPG ratings. They also share another trait: paddle shifters.
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post #11 of 38 Old 09-20-2015, 12:43 PM
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In the past, Honda coupes have always been more aerodynamic than the sedans. But even a .01 to .02 improvement in Cd won't save anymore than 1hp to 1.5hp to maintain 70 mph.
You might be right about the paddle shifters. The wheel size is also different, that goes into the mix as well. Does anyone know where to look for the EPA MPG math that the manufactures need to follow? I don't think manufactures would dock it unless they were forced to.

According to Car and Driver MPG drops ~1 MPG per 1" upsize. Maybe the rounding requirements is what makes the difference (17"= 33.5MPG, 18" = 32.4MPG). The sport loses 1MPG HWY with it's 18's.

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post #12 of 38 Old 09-20-2015, 12:59 PM
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I honestly believe that the EPA tests cars equipped with paddle shifters differently and rates them lower than they deserve. Case in point, the last-gen Honda Fit. The base model with 5AT and no paddle shifters was rated 28/35, while the Sport 5AT with paddles was rated just 27/33. The Sport only weighed 40 lbs more and had 185/55R16 tires versus 175/65R15's on the base model. I seriously doubt that 40 lbs and an inch larger wheel diameter caused a 2 mpg drop in highway MPG.

The 2016 Accord I4/CVT coupes and the Sport CVT share the same MPG ratings. They also share another trait: paddle shifters.
The larger wheel, and any increase to wheel and unsprung weight, can play a massive role in mpg. Especially with a car that's light on power and big on mpg like the Fit

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post #13 of 38 Old 09-20-2015, 01:21 PM
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The larger wheel, and any increase to wheel and unsprung weight, can play a massive role in mpg. Especially with a car that's light on power and big on mpg like the Fit
That's possible to a degree, but I doubt an inch larger wheel could make that big of a difference, even on a Fit. Now going from say...16's to 18's or 19's, that penalty becomes more believable.

My theory is that the EPA uses the paddle shifters and shifts the transmission like a manual instead of just leaving it in Drive and letting the computer do the work. The result is lower mileage ratings than the same powertrain without paddles.
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post #14 of 38 Old 09-20-2015, 01:24 PM
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You might be right about the paddle shifters. The wheel size is also different, that goes into the mix as well. Does anyone know where to look for the EPA MPG math that the manufactures need to follow? I don't think manufactures would dock it unless they were forced to.

According to Car and Driver MPG drops ~1 MPG per 1" upsize. Maybe the rounding requirements is what makes the difference (17"= 33.5MPG, 18" = 32.4MPG). The sport loses 1MPG HWY with it's 18's.
This subject could get very interesting. Rotational inertia can work in both ways. Inertia implies the mass will resist any change in motion (acceleration). When at rest, it will resist positive acceleration. When at speed, it will resist positive acceleration AND negative acceleration. Slowing is negative acceleration. Once at speed the heavier wheels should IMPROVE highway fuel economy because the inertia is now working in its favor to help it maintain speed. It should require less power (fuel) to maintain speed. More fuel to get there, less fuel to stay there. (This assumes steady speed on flat roads.)

Obviously we constantly accelerate and decelerate a little bit all the time on the highway (hills, turns, natural changes in speed, etc.) But once on the highway, I’m not sure how much heavy wheels affect fuel economy. I suspect heavy wheels are mostly a detriment to fuel economy in city driving.

As far as the 2015 Sport goes, the CVT Sport gets 1 mpg less on the highway than the CVT LX, EX or EX-L. However, the 6MT Sport gets the same mpg as the LX and EX 6MT Accord Sedans. The HWY mpg did not change with the 6MT. If there were a difference based on the heavier 18s, the sedan and coupe should be penalized equally but that is not the case.

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post #15 of 38 Old 09-20-2015, 02:48 PM
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The 5.6 number would be even better, however, the v6 (both the 6 speed auto and manual) are limited by traction (or the lack thereof)


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