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mpg ?

 
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Old 03-03-2009, 05:52 PM
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mpg ?

whats up everybody new here.

just wondering if a 4 spd gets better mpg then a 5
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Old 03-03-2009, 05:54 PM
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Re: mpg ?

I get about 340 miles off one tank of 91. But I do a lot of freeway driving so...
Oh yeah, I'm a 5spd.

Last edited by kevon54; 03-03-2009 at 09:06 PM.
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Old 03-03-2009, 06:56 PM
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Re: mpg ?

If your talking a 4speed auto vs a 5speed stick, the stick will definitely get better gas mileage.

There are no 4speed manuals though, so I'm not sure what your talking about if not
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Old 03-03-2009, 08:46 PM
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Re: mpg ?

der lol of coarse a manual would get better mgp im retarded :p
i just heard somewhere [who knows where] that having less gears is better on gas

in an auto seance and that doesn't really apply here because any 5 spds here are manual and there for just better in general!
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Old 03-03-2009, 08:49 PM
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Re: mpg ?

more gears = more mileage.
a 6speed going 100km/h may only be going at 3000rpms.
a 5speed may be going 4 to 5000rpms.
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Old 03-03-2009, 09:44 PM
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Re: mpg ?

Quote:
Originally Posted by MyFirstLude View Post
more gears = more mileage.
a 6speed going 100km/h may only be going at 3000rpms.
a 5speed may be going 4 to 5000rpms.
^Correct.
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No longer own a prelude - but got 3 Hold-me-over's in the mean time
02 Dodge stratus - All stock, my DD
89 EB Edition Bronco - 6" RC Lift, 35" KO's, 302/c6 swap, Ford 9"
79 F250 Ranger Lariat - 9" Lift, 40" Ground Hawgs, 400M/NP435/NP205, D60/D70 Locked
And about enough spare parts to build 3 other trucks

"Does this truck make my penis look small?"


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Old 03-03-2009, 09:57 PM
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Re: mpg ?

^^Incorrect.

It's not so much about how many gears, it's about the gear ratios. The perfect example is the EC5 Mitsubishi Galant, which has the option of a 5 speed auto or 5 speed manual. The auto has taller ratios, so at 100km/h revs far lower than the manual.

However in a manual vs auto comparison with the same ratios, the auto will lose out. The problem being that the clutch in the manual box can transmit practically 100% of drive power to the wheels. Whereas the torque converter setup in the auto (which is essentially just a complicated fluid coupling) is not able to transmit all the power - depending on the converter the most power you could get to the ground from the auto is 75-80% because torque converters never properly "lock up."
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Old 03-04-2009, 12:19 PM
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Re: mpg ?

^correct^
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Old 03-04-2009, 03:00 PM
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Re: mpg ?

Quote:
Originally Posted by Brash22 View Post
^^Incorrect.

It's not so much about how many gears, it's about the gear ratios. The perfect example is the EC5 Mitsubishi Galant, which has the option of a 5 speed auto or 5 speed manual. The auto has taller ratios, so at 100km/h revs far lower than the manual.
We weren't talking 5speed auto vs 5speed manual. There is no 5speed auto that comes on preludes. We were talking 4speed auto vs 5speed manual. You may be correct in your statement, but its sort of got an irrelevancy to the OP's question, because there is in fact no 5SA.

And my first lude simply stated that another gear will allow a taller gear ratio, and I will almost guarantee, there are no cars that have the option of a 4speed auto, and 5 speed manual that the 4SA would get better gas mileage. Thats all we're getting at.
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No longer own a prelude - but got 3 Hold-me-over's in the mean time
02 Dodge stratus - All stock, my DD
89 EB Edition Bronco - 6" RC Lift, 35" KO's, 302/c6 swap, Ford 9"
79 F250 Ranger Lariat - 9" Lift, 40" Ground Hawgs, 400M/NP435/NP205, D60/D70 Locked
And about enough spare parts to build 3 other trucks

"Does this truck make my penis look small?"


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Old 03-04-2009, 03:31 PM
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Re: mpg ?

even if 4 speed auto get 10 more mpg i would still go with 5 speed manual....spend couple more bucks each refill better then 3grands to replace auto tranny every 3 months lol
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Old 03-04-2009, 04:28 PM
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Re: mpg ?

Quote:
Originally Posted by Smok3y View Post
We weren't talking 5speed auto vs 5speed manual. There is no 5speed auto that comes on preludes. We were talking 4speed auto vs 5speed manual. You may be correct in your statement, but its sort of got an irrelevancy to the OP's question, because there is in fact no 5SA.
I know this. The fact is I was referring to this particular comment, which is incorrect, and to your backing up of it being correct. I suppose we could also dismiss MFL's comment as being irrelivent since there are no 6 speed Preludes. Well, except for those who have K-series engines swapped in (and if you swap in a K-series then fuel economy is not of any serious concern)

Quote:
Originally Posted by MyFirstLude View Post
more gears = more mileage.
a 6speed going 100km/h may only be going at 3000rpms.
a 5speed may be going 4 to 5000rpms.

Quote:
Originally Posted by Smok3y View Post
And my first lude simply stated that another gear will allow a taller gear ratio, and I will almost guarantee, there are no cars that have the option of a 4speed auto, and 5 speed manual that the 4SA would get better gas mileage. Thats all we're getting at.
That's not how I read it, but ok. Oh, and I almost totally dissagree on your last point (not quite, but almost) mainly because I get better economy out of my 4AT Prelude than many of my friends get out of 5MT examples. While I'm 100% sure this has to do with driving style, it still throws your statement out of whack. I've also been led to believe that in the case of the Honda Jazz/Fit/whatever else it is known returns better economy in the case of the auto than the manual.
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