Fuel weight

[DAN]

ten pounds =one horsepower power at least that was what was said at the drags. is it worth it? some highline cars use aluminum jacks

[StorminMatt]

I should also note that the 2G CRX HF has a gas tank that is about two gallons smaller than other 1988-1991 CRXs. This would reduce weight both my holding less gas AND from the smaller and lighter tank. And Honda apparently thought it made a big enough difference to actually put into production. Of coursethe HF also gets significantly better mileage than other CRXs, so a smaller tank is needed for the same range.

[SVOboy]

Originally Posted by StorminMatt

I should also note that the 2G CRX HF has a gas tank that is about two gallons smaller than other 1988-1991 CRXs. This would reduce weight both my holding less gas AND from the smaller and lighter tank. And Honda apparently thought it made a big enough difference to actually put into production. Of coursethe HF also gets significantly better mileage than other CRXs, so a smaller tank is needed for the same range.

I will verify this information for those of you who don't know CRXes, I've always wanted to do the swap with someone else...mehbe one day!

[Lazarus]

Originally Posted by DAN

ten pounds =one horsepower power at least that was what was said at the drags. is it worth it? some highline cars use aluminum jacks

If that's true then I think it would definitely show up. Is there a source for that you can link us to.

[SVOboy]

It's certainly not that pronounced. If so my 60hp engine would have a hard time moving my 2500 (laden) crx around,

[DifferentPointofView]

i think he means 10 extra pounds equals using 1 more horsepower. or so this is what I'm getting. 10 more pounds cruising where it would take 20 horsepower would now take 21.

[8307c4]

For a fuel station first you have to slow down, then maneuver all around and stop.
Then start back up, maneuver out of there and accelerate back into traffic.
You would have been way better off if you could've kept on going.

So first it hurts FE just to pull into a fueling station, then the weight of the fuel in the tank has gravity pushing down on it hence offsetting the entire benefit.

Always fill'er up, the more times you have to stop for fuel, the worse your mpg.

The one thing I found helps is budget fuel, as in set aside a limited amount of monthly money you can spend on gasoline and obey your budget!, Budget is King, budget is Queen, whatever suits you but budget rules. Now either you have enough fuel or you don't... You can do the budget weekly if that works better, doesn't really matter but track it and obey it and always fill her up.

Compensating for the fill up by lengthening the time interval is fine.
So for instance if you set aside 20 a week and it takes 30 to fill the tank, I would guess you'll be filling up about every 10-11 days, but 30 a week is 1560 a year or 130 a month <- It is these figures that need to be tracked, doesn't matter what it costs to fill up so long you never go over the total, and if you do then you're doing it wrong but first time that is ok just start over then do it right lol.

I do not know if 20 a week is enough, you have to figure this out, make it a bit tight but not too tight, but if you find room for improvement feel free to use it. Mine's $10 a week, I only drove maybe 4,000 miles last year, this took some doing and so don't be discouraged if it takes time, but after some years I feel at home with my fuel budget.

...............
btw a gallon of water weighs 8 pounds, fuel is slightly lighter but not much.
budgeting fuel money can also help one spot FE-related driving mistakes but also wasted trips, certainly the number of friends who used to ask me for a ride went down in amazing record amounts at the mere mention of the word budget lol
That's why I say, budget rules.

[trebuchet03]

Originally Posted by DifferentPointofView

i think he means 10 extra pounds equals using 1 more horsepower. or so this is what I'm getting. 10 more pounds cruising where it would take 20 horsepower would now take 21.

I understand you're elaborating on the previous comment (I'm just clearing up that point).

Given the same vehicle with say 2500lb and 2490lb. If the 2500lb variant requires 20hp to cruise - the 2490 will also require 20hp to cruise (okay, maybe 24.9982 due to incredibly smaller rolling resistance by comparison).

The above assumes on a flat and stead state cruising.

The big benefits (FE wise) of reducing weight come into play during acceleration This is why weight is such a big deal for city driving cars and why you're more likely to hear such information at a drag strip

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For fuel ups.... I personally go for a full top off. I'd rather not allow more opportunities for smog fumes (I wouldn't be as concerned if my state required EVAP recovery on all gas pumps). I also don't want the extra time it takes to do so. I also live in a pretty flat area - so things balance out

[MetroMPG]

Originally Posted by 8307c4

Always fill'er up, the more times you have to stop for fuel, the worse your mpg.

Not if you're pulling up to the pump at the end of a glide, and you depart on a pulse.