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Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

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Old 12-01-2006, 06:48 AM   #131
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Quote:
Originally Posted by onegammyleg
I wonder how that compares to other metro owners. ???
Got some RPM figures? (Otherwise we're just batting around subjectivity about what's "screaming" or not.)
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Old 12-02-2006, 02:19 PM   #132
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Hmm, for fuel mileage, it almost seems as if slightly higher FD with a much higher 4th and 5th gear would be the best way to go.

I don't mean to brag, but my FD is 3.08 and my 4th gear is .67, for a final motor revolution/wheel revolution of 2.0636. Highway speeds are in the 1000-1200 rpm range. I've noticed certain things that make for this possible, more torque down low. I've heard that engines are most efficient at their torque peaks, even though they waste the most energy here, so I was thinking what if we modified are smaller fuel efficeint cars to have more torque? right now I"m sure their torque peak is well above our crusing speed. I would imagine the torque band could be lowered for those of us running our engines at speeds lower than stock.

Even with my cars monstrous frontal area, drag C/D of .48, and 4.9 liter engine, I still managed 26 mpg at 60 mph, on e-85! this got me thinking maybe this platform isn't so horrible after all? after all, a 5.0 liter at 1000 rpms, is pumping the same amount of air as a 1.6 cylinder at 3125 rpm's, this would explain why my two cars are getting fairly close mpg. The motorcycle engine would have to be at 12,500 rpm's for the same air pumping, which would explain why even at 5000 rpm's with old carbeurators, it's still my MPG champion.

Well, now that i've shared some useless information, i'm more confused than ever as to what is ideal for gas mileage.
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Old 12-02-2006, 03:55 PM   #133
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Quote:
Originally Posted by red91sit
I don't mean to brag, but my FD is 3.08 and my 4th gear is .67, for a final motor revolution/wheel revolution of 2.0636.
.692 * 2.95 = 2.0414

Be jealous!
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Old 12-03-2006, 08:05 AM   #134
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True, my tires are only 175s,
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Old 12-03-2006, 08:47 AM   #135
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I always thought it was height/width/rim size.

175/55/13 I believe mine are.
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Old 12-03-2006, 09:03 AM   #136
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Oh shucks,

Things like that I could never keep straight. Thanks for the info.
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Old 12-03-2006, 09:03 AM   #137
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Mmm, swapping with a long-legged taller tranny beauty here in Metro...oops, that is another forum I am on, sorry!

Quote:
Originally Posted by onegammyleg
My Swift must have a different ratio than normal
metro's.
I rarely get to use fifth gear around the suburbs , definitely a highway gear for me.
US Metros are the same in behaviour, not sure if the box is the same between the US G10 motor and the European G13?

Quote:
Originally Posted by Silveredwings
So, asside from actually getting the diff, it may be easier than trying to get an oversized tire setup to fit.
In the 13 years we had our Metro, even simple tire changes would impact FE. In the end, I even thought of larger (155) tires Vs. the 145 to give better economy at highway speed (less rotations per mile) but this did not actually work out. Metro FE drops fast over about 55 MPH for sure, and I did not impact FE but I did impact acelleration.
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Old 12-04-2006, 12:40 AM   #138
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Quote:
Originally Posted by Spule 4
Metro FE drops fast over about 55 MPH for sure
Yeah , but my Swift /metro thing the economy is great still at 60+.
On one country trip I was still just getting just under 40 mpg with a lot of time spent at 130kmph , which is umm.. 80 mph.
Taking it a bit easier does give 47.

But the around town economy sux big time.(36) , even with pulse and glide I can get no where near the rated metro figures.
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Old 12-04-2006, 04:50 PM   #139
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Quote:
Originally Posted by onegammyleg
Yeah , but my Swift /metro thing the economy is great still at 60+.
On one country trip I was still just getting just under 40 mpg with a lot of time spent at 130kmph , which is umm.. 80 mph.
Taking it a bit easier does give 47.

But the around town economy sux big time.(36) , even with pulse and glide I can get no where near the rated metro figures.
Yes, but we were 50 MPG in the US, it drops to the 40-44 MPG range when you are around these speeds you post. A Metro will go 90......if you make it.
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Old 12-19-2006, 11:01 AM   #140
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For those who are following this thread, I finally posted a summary/report on metrompg.com: Project 'nerd gear': taller tranny transplant nets +5.2% MPG
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