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Old 05-26-2008, 04:31 AM   #26
papsimagoo
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so did club green get murdered?
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Old 05-26-2008, 09:20 AM   #27
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I could easily get that mileage coming down from Pike's Peak!!
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Old 05-26-2008, 02:54 PM   #28
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Keep in mind that most odometers/speedometers are off in stock Volvos. Mine reads about 5.05 miles in 5 actual miles, and that's with tires that are .3" taller than the stock 185/70-14s that came on my car. Stock sized would read even more miles for the same distance. And, you know that almost everyone is running a size that wasn't standard on these cars anyway... So I say odometer readings are no good unless it's been tested accurate, or very close to it. I checked mine on the way up from Salem yesterday. I figure if I pump my tires back up to 40psi from the 32 they were at on the drive I'll be just about spot on. HA! I did calculate the 215/45-17s to be the right size for odometer accuracy when I was running other size tires, but damn, that's pretty spot on.

My roommate's '83 245dl was "going" 325+mi on a tank until we fitted it with a more proper odometer/speedometer that matches his sedan sized tires a little better. Even now though, the speedometer reads at least 5% high...(195/60-15s)
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Old 05-26-2008, 03:17 PM   #29
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+1 on the odo inaccuracies.
Point to point verifiable on MapQuest would be good.

245-M46/311's/Lh2.2/91 octane,tire pressure @ 40 psi, 60mph on a level freeway,non stop,with reasonable sized tires would probably be 35 mpg.
So yea the Volvo engineers did it a long time ago,we just seem to have left the fold.
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Folks on here don't know a good deal when they see it.
how psi stock can support?

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Old 05-26-2008, 04:34 PM   #30
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i find the map sites are sometimes off. i drove a chevy van (less than 3yrs old) on stock tires. i went some place that google maps said was 14miles and my odometer said it was 16miles.
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Old 05-26-2008, 04:50 PM   #31
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I think this is an awesome idea, let's do it!

I say the requirements be this:
1. Show your odometer calibration factor (calculated with either a GPS, highway mileage markers set up for odometer calibration, or by an odometer shop)
2. Show at least 10 consecutive tanks of fuel, with start/stop mileage and fuel quantity

This will rule out odometer miscalculation, miscalculation from under-filling the tank, drunken calculator use, etc.

The 35-mpg should be a long term average IMO, not just something you got from one tank while drafting a truck downhill, topping it off real good before the drive, and not topping the tank off on the refill!

I'm curious to see if any red-blocks manage to make the cut (or any Volvos period). From owning 4 diesel Volvos with different transmissions and gearing, and trying numerous driving techniques I do not believe it is possible for a stock D24 or D24T to get 35+mpg as a long-term average. I even tried always driving 50-mph on the freeway in overdrive, with an M46+ D24 245, and still couldn't do 35-mpg for several consecutive tanks....

35mpg as a long-term average is much more difficult than it seems. I wouldn't be surprised if 90% or more of the reported 35mpg+ Volvos are the result of some sort of calculation error, rather than actual impressive fuel economy.
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Old 05-26-2008, 05:36 PM   #32
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I'm going to use my GPS to measure my fuel economy; at the moment I'm using the on board computer, but as I know at an indicated 76mph the GPS says 69mph or so... so when mine is showing 35mpg on the computer I know that it is out a bit; I've just got to work out the best way to do it (this weekend's challenge on a trip from Blackpool to Aberystwyth and back) to get the best out of the economy, and at what speed.

Need to fill up at the same filling station, and ideally on the same pump as the stop switch will be caliberated at the same point then, to the 1st stop click on the pump.

I'll also let you know what the economy is over the 2500 mile trip to Vallon Pont D'arc and back, with 2 kayaks on the roof for 1900miles+ of that; most of it is on motorway and autoroute so it should be reasonable.
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Old 05-26-2008, 05:39 PM   #33
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Ageed,I think 35 in a DD is going to be a loneley club unless someone is a traveling salesman.
Another factor is ethanol.
I got 32 mpg from Brookings to Santa Rosa on 101 in the 86-245/M-46.
Nothing special,legal speeds climbing 5 mph under the limit,
and 30 on Interstate 5 @ 70 in a 73 145 E.
[With Non Ethanol Oregon gas]
[US GAL]
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Old 05-26-2008, 06:00 PM   #34
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Quote:
Originally Posted by Al View Post
35 mpg U.S. is equal to 42 mpg Imperial.
35 mpg Imperial is equal to 29.15 mpg U.S.

We need to convince Mobil to bring back the
Mobil Economy Run. 1964 Buick commercial crowing about their wins in class.
Back in the mid sixties, my local SCCA chapter staged a yearly "Economy Run". It was sponsored by the local Austin Healy dealer who would always win it with a brand new Sprite and he'd brag about it in his newspaper ads. In '66 or '67, I had a new Opel Kadett and I kicked his butt. Prices for parts for my old MGA went through the roof. The guy just couldn't take a joke.

The Opel got over 52 mpg. with graphite in the wheel bearings, the accelerator pump on the carb disabled and 60 lbs of air in the tires.
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Old 05-26-2008, 09:22 PM   #35
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244 is tuned for ecodiesel status as i write this, no black smoke, lots of turbo MPG.

drove it this weekend for 200+ miles on less than 5 gallons of fuel.
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Old 05-26-2008, 10:00 PM   #36
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Quote:
Originally Posted by Redwood Chair View Post
...30 on Interstate 5 @ 70 in a 73 145 E.
Standard 145E w/overdrive?
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Old 05-26-2008, 10:07 PM   #37
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Quote:
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Standard 145E w/overdrive?
No, it had an M-40,and 165-15 tires.
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Old 05-26-2008, 10:16 PM   #38
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Quote:
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No, it had an M-40,and 165-15 tires.
Great - so room for improvement then!
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Old 05-27-2008, 01:27 PM   #39
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yes, the idea behind gas receipts and a planned trip (map) is to alleviate the problem of odometer inaccuracies and tire circumferences being different.
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Old 05-27-2008, 02:18 PM   #40
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Sweet. Our goal should be to beat 35mpg by the widest margin possible. It'll make an interesting challenge for our camping trip in June. We managed 32mpg on our last drive up to Sacramento in Lizadactyl's 855 5 speed, so 35 isn't too far off but it will require some modification.
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Old 05-27-2008, 02:23 PM   #41
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Quote:
Originally Posted by casioqv View Post
2. Show at least 10 consecutive tanks of fuel, with start/stop mileage and fuel quantity


Who is going to drive 10 consecutive tanks on the highway only? That's like over 5000 miles of just highway miles. Nobody is going to do that, even if they drive across the country they are still going to stop to sight see.

I'll be going to Idaho this summer so I will record the two 400 mile trips there and back. I think I'll throw in 87 to get the most out of it.
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Old 05-27-2008, 08:32 PM   #42
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I have no way of 'proving' it now...and it's 3 years since the car was like this...but before I fitted the Webers (Solexs....but you know what I mean if I say Webers ) my 360 would routinely return 45 imperial MPG at 70mph, and 50mpg at 60mph. That was as reported by my accessory Volvo driving computer, which was calibrated for both distance and fuel usage

That's a B200 (2.0 B230) with a baby Solex carb, Y cam...stock...1150kg body...3.36 rear end with an M47, etc.

cheers

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Old 05-28-2008, 12:00 AM   #43
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u think anyone can get this on a b230 turbo?
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Old 05-28-2008, 08:51 AM   #44
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Quote:
Originally Posted by Paddler Ed View Post
I got all hopeful when I saw 35mpg as that's my target for driving down through France with 2 kayaks on the roof... then remembered that US Gallons are smaller than UK gallons (surprised they've not supersized them yet...)
f you..
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uhhhh this is Turbobricks. $4k is like 95% of the entire board's car **** budget added together for a year.
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Old 05-28-2008, 01:28 PM   #45
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Haha!

940 LPTs (B230FK) seem to be capable of 40mpg (imperial) if you drive them gently enough. Getting over 30mpg (imperial) isn't hard on a run.

cheers

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Old 05-28-2008, 01:42 PM   #46
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Quote:
Originally Posted by mo5005 View Post
u think anyone can get this on a b230 turbo?
On a good day on flat roads I can get around 31 mpg at 55 mph.
87 745T M46, lowered, 3.31 rear gears.
With a 95 940 and manual conversion and 3.31 rear gears I could see 33 to 34 mpg at 55 mph with it's better aero numbers. Put in a full belly pan and I'd bet it would be worth an additional 2 mpg.
I know people with later 940 NA's that get above 30 mpg with no mods on the highway.
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Old 05-28-2008, 03:36 PM   #47
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Quote:
Originally Posted by Poik View Post


Who is going to drive 10 consecutive tanks on the highway only? That's like over 5000 miles of just highway miles. Nobody is going to do that, even if they drive across the country they are still going to stop to sight see.
You're right, I didn't think about that.

I am on a long road trip right now with my 760 (Google I/O conference). I got 34.11 mpg (calculated using a GPS odometer, and using biodiesel from Pacific Pride, topping off to the exact same level both times) for my first tank of 375.3 miles driving from Corvallis->Portland->Ashland. Let's see if I prove myself wrong about the 35mpg in a D24T by the end of the trip!

That's driving 75mph with an M46 and a 3.91:1 rear axle (really low gears, 4,000+rpm at cruise).

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Old 05-28-2008, 04:01 PM   #48
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Quote:
Originally Posted by boostdemon View Post
Ok, lets get some rules and test criteria figured out...

  • 35mpg highway
Question - Do you use the "new" math or "old" math to figure mileage


Btw, for those with automatics without lockup torque converters, I don't recall the topic of torque-converter's stall speed being mentioned....with Borg Warner transmissions, I have no idea what range there is. Lower stall speed torque converter would translate into better mpg...as I understand the topic....have no idea what rebuilts cost.
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Old 05-28-2008, 06:44 PM   #49
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I'm down to play along. I would love to see 30+ from my old 245. My 97 Talon gets 38mpg on the highway at 80mph+ in 110* heat with the AC going. So far, the 245 seems to pull down 24-26 around town.

I'm going to do an odo check against mile markers on the highway before this tank is out, then start tracking MPGs over the long term. It would be interesting to see how this plays out.
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Old 05-28-2008, 06:48 PM   #50
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Quote:
Originally Posted by swiftjustice44 View Post
I could easily get that mileage coming down from Pike's Peak!!

computer pegged out and freaked once it hit 99 mpg on our S70 going down some hills by our house....amazing how far a heavy car like that can "coast"
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