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Old 09-20-2016, 02:06 PM   #41 (permalink)
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I agree, narrower is better in snow. On previous car's I went from 215's down to 195's, I remember my first several FWD cars all had 155 and they were great in snow. 3rd one was a 1990 sentra at 2200 lbs never had a though of needing winter tires. Now with 195 on a 2600 car, can't imagine not having winters.

CapriRacer would state that wider gives best MPG all else equal.

Barry's Tire Tech

7%, I don't think we know his 16" tire size he might already be getting that, 7% + LLR might make a difference.


Last edited by roosterk0031; 09-20-2016 at 06:29 PM..
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Old 09-20-2016, 04:54 PM   #42 (permalink)
Stock MPG 22city/32 hwy
 
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thanks for all the great information provided here. So far I've seen marketed improvements in my MPG. Currently got 120 miles on 1/4th a tank of gas (approx 2 1/2 gal) using simple Pulse and glide. Around 48mpg. I did get lucky and yesterday I got behind a cement truck that never went above 50 mph, allowed me to P&G on the freeway at 50 pulse, down to a 35mph glide. Even got off at my same exit. Made a huge difference being able to drive at those speeds for the whole 30 mile commute.

Last weekend I got the shaft on starting the mods. Rained all weekend. Hoping to get at the minimum my rust fixed and skirts on, and upper grill block. Have them all cut and ready to be installed, but have to fix the rust before I start slapping things over top of the metal.

Want to talk to my mechanic about getting a kill switch installed on the Aveo. Around 8 miles of my drive is isolated straight country roads, perfect for EOC. Only problem if I EOC coast now my dash shuts down. Doesn't track my mileage. Probably need to get a scangauge as well
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Old 09-20-2016, 05:46 PM   #43 (permalink)
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Engine on P&G it think is tough to do and make a large gain in mpg vs just driving the average speed, unless you have so hills to help extend glides.

http://ecomodder.com/forum/showthrea...oad-19594.html

Check out post #8, it shows how much the engine load during the pulse can affect the efficiency of P&G. Later I asked about his constant 32 mpg and he said it was 51-52 mpg in 4th, 55 in 5th, so pulsing at 70% load was only netting him up to 4 mpg and he was going engine off.

Since your thinking about going back to the 14" for winters, Nokian makes a WRG3 directional in 185-65-14 so a little taller than your OEM 14" $72 at simple tires not quite as pricey but I believe is still LRR.

Last edited by roosterk0031; 09-20-2016 at 06:44 PM..
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Old 09-21-2016, 04:41 PM   #44 (permalink)
Stock MPG 22city/32 hwy
 
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Quote:
Originally Posted by roosterk0031 View Post
Engine on P&G it think is tough to do and make a large gain in mpg vs just driving the average speed, unless you have so hills to help extend glides.
My pulse and glides have been helping considerably with my MPG (so far around a 10% increase with engine on clutch in glides). The aveo at 70 mph (majority of my drive) runs at 3200 RPMs. When I push in my clutch during my glide (from 70 down to 55), It drops down to 600 rpms. Did figure out a way last night to do some EOC with the ability to turn my speedo and dash info back on. Should help even more with my MPG. The current gas tank will tell the story tho. I'm only at about a half tank, 210 miles, hovering right at 40-43 MPG, which is up from 36 mpg without P&G.
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Old 09-21-2016, 04:57 PM   #45 (permalink)
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Looks like you're going to hit your 40mpg goal.

If you're pulsing between 70 and 55, I expect your average speed is doing to be a bit less than halfway between the two (due to non-linear decelaration), somewhere around 60mph. I wonder what your fuel economy would be when cruising at a steady 60mph?

Don't get me wrong, pulse and glides can help even with the engine on, but reducing speed has a tremendous impact on fuel consumption too.
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Old 09-21-2016, 05:51 PM   #46 (permalink)
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Quote:
Did figure out a way last night to do some EOC with the ability to turn my speedo and dash info back on.
Turn the key off and back on?
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Old 09-21-2016, 06:47 PM   #47 (permalink)
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Originally Posted by freebeard View Post
Turn the key off and back on?
if you turn off, then turn it back on, the engine starts up. You have to have ease it so it doesn't crank. It's a fine line sweet spot between the accessories and the on to get the car's dash to turn back on, without it starting the engine. Hard to explain, but def not as easy as a simple on and off.
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Old 09-21-2016, 07:03 PM   #48 (permalink)
Stock MPG 22city/32 hwy
 
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Quote:
Originally Posted by Ecky View Post
Looks like you're going to hit your 40mpg goal.

If you're pulsing between 70 and 55, I expect your average speed is doing to be a bit less than halfway between the two (due to non-linear decelaration), somewhere around 60mph. I wonder what your fuel economy would be when cruising at a steady 60mph?

Don't get me wrong, pulse and glides can help even with the engine on, but reducing speed has a tremendous impact on fuel consumption too.
Tough to really go any slower than that. After I get out of my traffic jam area, it's 70 mph, majority going 80 plus. I don't want to be too much of a safety hazard driving much slower than 60. Some days I get lucky and get behind a semi/utility truck and can go slower.

I'm in the experimental phase one of altering my driving habits. At long traffic lights before I hit the freeway, I'm now turning my car off. In the traffic jams, I'm pretty much engine on neutral gliding the whole time, never coming to a full stop, or accelerating past 2000 rpms during my mini traffic jam glides. Once I hit the flow, I start doing 70 to 55 P&G engine on, most days 60mph to 50 since traffic is pretty heavy and the pace is hovering around 65mph. Then I hit my exit, and get 7 miles of vacant country roads to do EOC. It's a mixed bag.

I'd estimate going a steady 60mph would probably give you the manufacture suggested MPG of 35 in ideal weather conditions. Previously I drove 70mph, kept up with the flow, and was getting 320 minimum-360 max. miles per tank with my current modifications. That's up from 280-310ish when I was 100% stock

Since I do drive a bit faster than most ecomodders, I really think the aero mods will pay off with my tailored P and G methods.
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Old 09-22-2016, 11:13 AM   #49 (permalink)
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Your idle consumption is probably about 0.25 gph. My 2.2 is over .3 If you time your average glide and figure out how many glides you do per tank. You could calculate how much fuel you could save per tank if you switched to EoffC to see if the ROI is worth it.

Had one of my best tanks ever today, 2 really foggy mornings held my speed down, and followed a school bus then an oversized load this morning at little slower than normal. Oddly the car's average speed was still at normal 47-48 mph, 45.8 mpg indicated by car, 45.78 mpg calculated using E15.

Don't know if your heat/ac works the same as the my Cobalts, it appears to have similar rotatory knob, if I get to close to the floor position it turns the AC on to de humidify. The other way to tell when the AC kicks on it will turn recycle off if you have that option.

Last edited by roosterk0031; 09-22-2016 at 12:46 PM..
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Old 10-18-2016, 03:43 PM   #50 (permalink)
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When you go to get a new vehicle look at what fuel milage they get i have driven an 01, 02, 03 and 05 civic and get 40mpg without trying. I actually drive it pretty hard in town but keep a steady 70mph on the freeway. Quite often with my wife and 2 kids, no aero mods. The 05's are dirt cheap but 01-05 is very unreliable and expensive to maintain. My 93 festiva is super cheap to maintain, never breaks down and regularly gets 46mpg driving the same way. They can be bought for $500.
Fuelly is a good place to check real world fuel milage of cars your looking at.

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