Highway cruising gear

[DC2R]

Originally Posted by BRZfan

What do you mean by "hyper mile"?

Hypermiling is a word used to describe the act of employing techniques to decrease fuel consumption. Some examples are:
Pulse and glide
Proper engine breaking
Driving in highest gear possible

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[SirBrass]

Originally Posted by krayzie

Oh that sucks must be the wear and tear mileage overtime. A friend of mine also had a drive axle break on him with an old '87 Accord. My gf in high school had an '89 Accord with low mileage and it was a real blast to drive (other than the really slow acceleration). I'm saying this even when I was driving my parents' new '96 Integra at the time (still very fond of the handling of this car).

I feel so bad for the younger kids that have to put up with crap like a Toyota Matrix (does that even come in a manual?).

This accord was an automatic, too. Maybe if it'd been a manual, I'd have enjoyed it more...

On phone I am. Therefore, if mistakes I make, Frank Oz blame you should.

[strat61caster]

Originally Posted by BRZfan

What do you mean by "hyper mile"?

http://www.wikihow.com/Hypermile

These are pretty basic tips but there are guys in stripped out 80's Civics and Geo Metros getting 50+ mpg without too much sacrifice. Standard sedans and such can usually achieve 30+ with just a change in style and some patience (i.e. drafting a truck at 55 mph, cruise control, coasting down hills).

Personally it's a really interesting subset of enthusiasts, the name of the game is self control compared to forums like this where a lot of people try to outdo each other.

http://ecomodder.com/
http://www.aerocivic.com/

Edit: Hell if someone is dedicated I wouldn't blink twice at a Toyobaru pulling 40+ mpg on a tank with some of the tips above and a forgiving route.

[Pegasus]

Originally Posted by SirBrass

Wrong, wrong, wrong. You are completely incorrect.

6th gear in this car is overly long. It is, in essence, your overdrive gear.

Look at any mapping of the stock gear ratios and you'll see a nice, even curve till 6th when the line for 6th dives down & out, really long.

If you want to know what a 6th great that's meant fire hard driving is like, drive an STi. One of the reasons it drinks gas is because ALL of its gears are very close ratio.


On phone I am. Therefore, if mistakes I make, Frank Oz blame you should.

According to this thread, there is very minimal difference between 5th & 6th. Also, from my personal driving impressions the rpm only jumps like 1k down shifting into 5th from 6th. If my numbers are correct, the differences are % wise.


1st-2nd. 41.775% I think these are all wrong btw, lemme try one more time. 1st-2nd 52.808%
2nd-3rd. 31.845% 2nd-3rd 37.875%
3rd-4th. 28.7% 3rd-4th 33.611%
4th-5th. 28.7% 4th-5th 33.4895%
5th-6th. 18.373% 5th-6th 20.232%


From these numbers ( My personal calculations ) 5th and 6th are the closest gears. Compared to a C7 the difference is 16% between 6th & 7th & 5th-6th 33% & 4th-5th 26%. So it seems to me that 6th in the FR-S is NOT an overdrive. But my #'s are not 100% reliable, feel free to prove me wrong.


There is also this review of the C7 and they mention the massively high 7th gear spinning 1,600rpm @ 80mph is crazy. Say's it @ 8:20. And that's how they got 29mpg out of a 6.2L V-8 IMO. And why I drive everywhere in 6th.


[ame="https://www.youtube.com/watch?v=RmfKDOOv1OA"]Corvette C7 Stingray Review - Everyday Driver - YouTube[/ame]

[SirBrass]

*facepalm*

Uh, you don't know much about how gear ratios are even listed, do you:

Here's what the brz 6mt has:

1st: 3.626
2nd: 2.188
3rd: 1.541
4th: 1.213
5th: 1.000
6th: 0.767
Final Drive: 4.100

An aside: AFAIK, those ratios are the ratios between flywheel speed and the final drive ratio. You then take that speed, apply the FD and you then get your axle rotation. Apply equations for what that speed with a wheel of diameter matching that of your tires is, and you get your road speed.

So, percentage listings between gears is actually useless. /aside

That's actually quite a long gear for 6th if mapped out for rev range (y-axis) vs. speed (x-axis).

See how it suddenly goes long for 6th, whereas 1st-5th progress steadily up, till 6th just nearly flattens out? That's your economy gear. Much like 5th gear in the WRX:

http://www.ft86club.com/forums/showp...4&postcount=14

[PBM317]

Originally Posted by Pegasus

According to this thread, there is very minimal difference between 5th & 6th. Also, from my personal driving impressions the rpm only jumps like 1k down shifting into 5th from 6th. If my numbers are correct, the differences are % wise.


1st-2nd. 41.775% I think these are all wrong btw, lemme try one more time. 1st-2nd 52.808%
2nd-3rd. 31.845% 2nd-3rd 37.875%
3rd-4th. 28.7% 3rd-4th 33.611%
4th-5th. 28.7% 4th-5th 33.4895%
5th-6th. 18.373% 5th-6th 20.232%


From these numbers ( My personal calculations ) 5th and 6th are the closest gears. Compared to a C7 the difference is 16% between 6th & 7th & 5th-6th 33% & 4th-5th 26%. So it seems to me that 6th in the FR-S is NOT an overdrive. But my #'s are not 100% reliable, feel free to prove me wrong.


There is also this review of the C7 and they mention the massively high 7th gear spinning 1,600rpm @ 80mph is crazy. Say's it @ 8:20. And that's how they got 29mpg out of a 6.2L V-8 IMO. And why I drive everywhere in 6th.

Post is a classic example of "data never lies, but liars use data." Not calling you a liar, just saying how data can be misinterpreted.

Yes, you can use a top gear to get good mileage, but that's ONCE YOU GET TO CRUISING SPEED. They don't say to jump to top gear immediately and just floor it to get to that speed.

[Slash]

This shits half the reason why car manufacturers don't make manual cars anymore. This dudes cruising 60 MPH in 4th.

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[SirBrass]

Edit: oops. Realized you were quoting a different poster. I just saw ratio numbers and assumed it was my post. My bad.

I apologize for not making that clear.

I NEVER jump to 6th just for economy. That's dumb. You'll lug the engine or simply end up being too slow to accelerate for traffic.

Maybe I should have called 6th 'cruising gear.' That's what I use it for AT CRUISING SPEEDS.

What I was trying to disprove is the mistaken notion that in this car, 6th gear is a close ratio performance gear. It isn't. If you're in 6th for anything, you are almost guaranteed to need to downshift for anything if your revs in 6th when you need to pass are below 4k. Above that? Good luck. It's one reason why the top end feels weak at high speed: it's the gearing, not the power (well, not necessarily). Going FI will solve that issue, b/c FI LIKES longer gears in general. But NA at this power level, 6th is anemic, and is meant to be so. It is why this car can be peppy and get into it rev-wise, but still get good gas mileage: 6th gear at cruising speeds.

Btw, cruising speeds is where you're just holding speed with light throttle at 55mph or higher. YMMV as positive elevation changes may force you into 5th for certain speeds.

[Akari]

The sweet spot in our cars seems to be 45mph in 6th gear for fuel economy assuming you're not trying to accelerate more. If you're shifting into 6th at 35mph you're lugging the engine and will get worse fuel economy than were you in 5th while putting more wear on the engine.

If I could drive 45mph all day I'd be sitting around 40MPG! My current average in mixed driving usually sits around 32.

[SirBrass]

I never shift to 6th at 45 mph. Maybe 5th gear if the road is flat and there's no traffic ahead, but not 6th gear. It's just too long, and if I lose any speed, it's impossible to get back if I'm geared to 6th.

45mph isn't even a cruising speed. It's a street speed. So is 50mph. (at least here it is)

[Akari]

Originally Posted by SirBrass

I never shift to 6th at 45 mph. Maybe 5th gear if the road is flat and there's no traffic ahead, but not 6th gear. It's just too long, and if I lose any speed, it's impossible to get back if I'm geared to 6th.

45mph isn't even a cruising speed. It's a street speed. So is 50mph. (at least here it is)

Are you trying to say you can't cruise on a street or you can't downshift if you start to lose speed? -Just seems lazy IMO.

[SirBrass]

I'm saying that if I'm in 6th at 45 mph, and I lose speed due to traffic or whatnot, I must downshift. On the street this happens often enough that it's just not worth it, as I'd be constantly be shifting in and out of 6th. And if the street is empty enough that that's not an issue, then I'm going to be going about 10-15 mph faster than 45mph anyway.... in 6th gear.

[Akari]

Originally Posted by SirBrass

I'm saying that if I'm in 6th at 45 mph, and I lose speed due to traffic or whatnot, I must downshift. On the street this happens often enough that it's just not worth it, as I'd be constantly be shifting in and out of 6th. And if the street is empty enough that that's not an issue, then I'm going to be going about 10-15 mph faster than 45mph anyway.... in 6th gear.

Ah, I daily get stuck on 6-10 mile long roads going 45mph behind traffic that keeps at a constant speed. Must just be differences in traffic!

[SirBrass]

Originally Posted by Akari

Ah, I daily get stuck on 6-10 mile long roads going 45mph behind traffic that keeps at a constant speed. Must just be differences in traffic!

The long roads of constant speed traffic I see are generally going varying speeds of between 60-80mph on the freeway. I'm in 6th gear for that anyway for cruise, and 5th for passing.