Re: 440 fuel mileage...
#347074
06/17/09 07:09 AM
06/17/09 07:09 AM
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Joined: Jan 2005
Posts: 4,862 the frozen wastes...
Pale_Roader
Swears too much
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Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
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Quote:
First of all, your (I'll refrain from added descriptors I'd love to add) Caddy doesn't weigh any 6000 lbs unless it's a hearse
Well you nailed it. 68 M&M hearse to be exact, and i know exactly how much my car weighs. Its no lightweight. Had it down to just 5500 once with the interior gutted to sheetmetal and the bench seat.
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74 Dodge 4x4, yanked the 360 2bbl and installed a 440, essentially the combo would be equiv to stock 440 magnum. It would STILL kick your Caddy's ass, and got nearly 14 with the gearing in the p.u. in 2x4 and hubs kicked out
I'll take that race. I said it was slower than the Charger, but its pretty damn fast for three tons and highway gears. I'd put it up against any stockish 6000lb rig that isn't a diesel. I bet your trucks got a lot better gearing than my deathmobile.
I know we're not allowed to admit other makes are fast on Moparts, but i think the guys on a Caddy forum would take issue with your comment. Caddy's are kinda like Buicks... the math is just different.
All in good fun, huh...???
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Re: 440 fuel mileage...
[Re: DaytonaTurbo]
#347075
06/17/09 07:23 AM
06/17/09 07:23 AM
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Joined: Jan 2005
Posts: 4,862 the frozen wastes...
Pale_Roader
Swears too much
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Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
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Quote:
Good job ignoring the fact that your 76 440 has a whopping 7.5:1 of factory compression ratio. Compression = efficiency and anything out of the late 60's would have had a CR in the 9's most likely. Then you take a smogger 440 and add a bit of cam to it, well you didn't have much cylinder pressure to start with any any cam over a stock passenger car/lo-po cam will drag down mpg.
Not ignoring anything here. I know this thing aint the best factory design (kinda my point), but the OP's car aint pushing much past 9 either. The engine i ran before this one was a 67, with the stock "10:1" and it was a pig too. It wasn't as nice an engine as the current one, but the CR made up for it. Both got about the same mileage in this car. I guess what i'm saying is that the OP has a factory set-up, which is hardly what i'd consider an efficient engine design (sorry Mopar gods...). If you were to go through the trouble to install a 500 Caddy behind the 727 in the same car (uh oh... blasphemy!) just to prove a point, i guarantee you'd see a dramatic improvement in MPG and power... despite the obvious cid increase.
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The exhaust he has is fine for his app.
I disagree.
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No way it is causing that low of a MPG.
I agree. I didn't say it was CAUSING the problem. He asked what he could do to improve MPG. Replacing it with an optimized system certainly would.
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Re: 440 fuel mileage...
[Re: Mr.Yuck]
#347079
06/17/09 05:25 PM
06/17/09 05:25 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Honestly it should be about double what you're getting if that's highway miles.
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Re: 440 fuel mileage...
[Re: Mr.Yuck]
#347080
06/17/09 05:34 PM
06/17/09 05:34 PM
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Joined: Nov 2008
Posts: 671 Wisconsin USA
Bill MeLater
mopar
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mopar
Joined: Nov 2008
Posts: 671
Wisconsin USA
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Quote:
who cares...why did you use a 440 if you want mpg's? the 2 don't mix. That said you should be doing better than 7mpg. I had a S/C'd 440 coronet w/ 3.91's and managed 11-12mpg at 70-75 mph
EXACTLY: Figure around $30.00 a day for a reasonable ride at todays gas prices. The alternative is my '96 Dakota 2.5....I try to use that only for work. Enjoy...
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Re: 440 fuel mileage...
[Re: SomeCarGuy]
#347083
06/17/09 11:37 PM
06/17/09 11:37 PM
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Joined: Jan 2004
Posts: 9,066 Eugene, Oregon
minivan
OP
master
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OP
master
Joined: Jan 2004
Posts: 9,066
Eugene, Oregon
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Quote:
You guys that "don't care", don't drive much.
If he gets the MPG up to at least 12, he almost cuts his fuel bill in half, leaving more money for extra drives or improving the car in some way, or you name it.
Now were talking..
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Re: 440 fuel mileage...
[Re: Lefty]
#347088
06/18/09 01:06 AM
06/18/09 01:06 AM
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Joined: Sep 2005
Posts: 6,516 Santa Cruz, California
Lefty
master
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master
Joined: Sep 2005
Posts: 6,516
Santa Cruz, California
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Quote:
( see my other thread)
I just realized I replied the same in the other thread, didn't know it was you with two similar questions...
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