Dr Olds Mileage Machine
October 8th, 2017, 06:58 AM
#1
Out of Line, Everytime😉
Thread Starter
Join Date: Dec 2006
Location: Melville, Saskatchewan
Posts: 9,140
Dr Olds Mileage Machine
Picture Dr Olds in a Nursing Home. He is old and bitter and has become very cheap as well. Igor comes to visit every week,telling him he just finished the 80 442 W30, the last it's kind. Dr Olds snaps at him, "Why didn't you use the 403?". Igor apologises and knows the Dr is right, but GM cancelled it. He tells igor he has finally found a way to make the Baby Olds 260 somewhat driveable. He knew of GM's plan of an overdrive transmission the next year. Why not combine the 260 with forced air and small dual exhaust, the new 2004R and 3.42 gears. Surely GM would make a combo like this. Not choked exhaust, crappy 3spd andsuper tall gears. That would be painful to drive, I want a cheap to operate car that can beat a toddler on a tricycle at the stop light. Don't worry Dr, I am sure GM has the"Brain's" to build a car like that. Yes, Brain's!
Last edited by olds 307 and 403; October 11th, 2017 at 09:52 PM.
October 8th, 2017, 10:34 AM
#7
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 48,237
You DO realize that the center of the hood is actually a LOW pressure area, right? There's a reason why Olds put the O.A.I. openings under the bumper, at the headlights, or at the very front edge of the scoop. Your "force air" setup is actually sucking air OUT of the carb. 
Most factory musclecar hood scoops were completely ineffective or worse and were 99% optical only. The high pressure areas on a car are the front bumper/grille/leading edge of the hood and the base of the windshield.
Most factory musclecar hood scoops were completely ineffective or worse and were 99% optical only. The high pressure areas on a car are the front bumper/grille/leading edge of the hood and the base of the windshield.
October 8th, 2017, 11:33 AM
#8
Out of Line, Everytime😉
Thread Starter
Join Date: Dec 2006
Location: Melville, Saskatchewan
Posts: 9,140
Oh know I am starving the Dualjet!��. I went in the front fenders with dual snorkel on the 70S. Sheesh, you guys are critical��. Either way it wasn't bad to drive 2 plus hours. My speedo is 10 km/hr slow, how much does it affect the odometer?
October 8th, 2017, 11:46 AM
#9
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 48,237
October 8th, 2017, 01:31 PM
#10
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Join Date: Jun 2009
Location: southeastern Michigan
Posts: 14,432
By the way, how do you know the speedometer is slow? Did you check it against a GPS?
October 8th, 2017, 01:59 PM
#11
Out of Line, Everytime😉
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Join Date: Dec 2006
Location: Melville, Saskatchewan
Posts: 9,140
Yes, I have a speedometer app. I am planning on running 225/70R14 tires in place of 235/60R14 tires. This trans had the brown gear vs the usual black one. Pulling the speedo bullet can be a bitch, picked the closet gear. It will be perfect with the taller tires. Plus even less rpm on the highway. I will report on the highway mileage. Thinking pretty good.
October 8th, 2017, 03:12 PM
#12
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 48,237
GPS is for people who can't do math...
Find a stretch of highway with mile markers. Note the odometer when you pass the first mile (or KM) marker. Drive for a while (say 10 mi or 15 KM). Note the odo when you pass the last marker. Do the math. That's the percentage that your odo is off.
Find a stretch of highway with mile markers. Note the odometer when you pass the first mile (or KM) marker. Drive for a while (say 10 mi or 15 KM). Note the odo when you pass the last marker. Do the math. That's the percentage that your odo is off.
October 8th, 2017, 06:52 PM
#14
Out of Line, Everytime😉
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Join Date: Dec 2006
Location: Melville, Saskatchewan
Posts: 9,140
It is way off. It showed I went 224 km. It is 215 km to get there. I went there and 3/4 of the way back. It should be 383 km. It used 41 liters, that means 26 mpg imperial averaging 100 km/hr or 60 mph. That means high 20 mpg in the summer with less wind. Awesome.
October 9th, 2017, 07:33 AM
#16
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 48,237
October 9th, 2017, 11:33 AM
#17
Registered User
Join Date: Jan 2016
Location: Nassau County, NY
Posts: 1,019
Nonsense! I figured out mine out to old fashioned way, I blew past a highway cop at 65 and when he pulled me over he asked if there was any reason I was doing 75 in a 50.
Did some math and came up with a difference of 10 MPH faster than the speedo is showing.
As for fuel economy I can't tell you that, my car has an awful problem with maintaining steady RPM's. Loose nut behind the wheel.
I like your ride though.
Did some math and came up with a difference of 10 MPH faster than the speedo is showing.As for fuel economy I can't tell you that, my car has an awful problem with maintaining steady RPM's. Loose nut behind the wheel.
I like your ride though.
Last edited by zeeke; October 9th, 2017 at 11:36 AM.
October 9th, 2017, 03:08 PM
#19
Out of Line, Everytime😉
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Join Date: Dec 2006
Location: Melville, Saskatchewan
Posts: 9,140
It is 10 or maybe 11 km/hr slow according to the GPS. I agree the odemeter is confusing, it is more than one in 10 for sure. Next trip, probably in spring with the proper tires, I will go off the GPS odometer. Either goal reached, shooting for 30 mpg, should get awfully close.
October 9th, 2017, 04:29 PM
#21
Registered User
Join Date: Feb 2013
Location: Phoenix, AZ
Posts: 14,701
I don't worry about mileage. My "new" car can get over 20 in town (with someone else driving it, that is) but my last fill up was 16. It's just way too fun to spool the turbo and see the tach rapidly approaching the redline!
October 10th, 2017, 06:38 AM
#22
Out of Line, Everytime😉
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Location: Melville, Saskatchewan
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This car does very well in town, acceleration and mileage for what it is. In the valley hills definitely needed to kick it down and the little 260 sounds like 6000 at it's 4000 rpm shift points. I wish I would kept my SP2P intake. A member on the G body forum with a swirl port 307 HO just got it rebuilt using the Performer manifold and Edelbrock 500 cfm carb. I told it was probably going to run like crap. He is smiling ear to ear driving it, so much more power. Maybe the smaller carb not overwhelming the tiny ports? I am tempted in swapping a Performer and primary tune from the Dualjet into a Quadrajet but a lot of work for questionable gain.
Last edited by olds 307 and 403; October 10th, 2017 at 06:41 AM.
October 10th, 2017, 08:53 AM
#23
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Join Date: Nov 2007
Location: Vancouver BC
Posts: 601
I don't understand talk on this site about gas consumption. We drive "mostly" big
V-8 in big heavy cars built 40 years ago. If you want "good" fuel consumption go buy a Prius. The "classic" are made to put the pedal to the metal and have some fun!
V-8 in big heavy cars built 40 years ago. If you want "good" fuel consumption go buy a Prius. The "classic" are made to put the pedal to the metal and have some fun!
October 10th, 2017, 08:59 AM
#24
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Join Date: Jun 2009
Location: southeastern Michigan
Posts: 14,432
I occasionally get asked when I'm filling the tank on my '67 Delta 88 what kind of mileage the car gets. I always say, who the hell cares??? I tell them 2 or 3 miles per gallon on a good day when I'm going down hill with the wind at my back.
I put maybe 500 miles a year on the car. That's like 2 or 3 tanks of gas a year. I couldn't care less about mileage. You don't own a car like this because you're concerned about mileage. That's what the Honda Civic back home in the garage is for.
October 10th, 2017, 12:23 PM
#25
72 Olds CS
Join Date: Jun 2011
Posts: 6,657
Thank you!
I occasionally get asked when I'm filling the tank on my '67 Delta 88 what kind of mileage the car gets. I always say, who the hell cares??? I tell them 2 or 3 miles per gallon on a good day when I'm going down hill with the wind at my back.
I put maybe 500 miles a year on the car. That's like 2 or 3 tanks of gas a year. I couldn't care less about mileage. You don't own a car like this because you're concerned about mileage. That's what the Honda Civic back home in the garage is for.
I occasionally get asked when I'm filling the tank on my '67 Delta 88 what kind of mileage the car gets. I always say, who the hell cares??? I tell them 2 or 3 miles per gallon on a good day when I'm going down hill with the wind at my back.
I put maybe 500 miles a year on the car. That's like 2 or 3 tanks of gas a year. I couldn't care less about mileage. You don't own a car like this because you're concerned about mileage. That's what the Honda Civic back home in the garage is for.
LOL im joking w the lads at work between a BBO, late model muscle and a truck i typically end up w the worst mileage of all in the conversation
although i am impressed w the late model muscle cars mpgs in the low 20s while still providing tons of fun.
Took my BBO into work today and i know this being the second rt commute w it i need to fill the tank on the way home
October 10th, 2017, 05:45 PM
#26
Out of Line, Everytime😉
Thread Starter
Join Date: Dec 2006
Location: Melville, Saskatchewan
Posts: 9,140
October 10th, 2017, 05:48 PM
#27
Out of Line, Everytime😉
Thread Starter
Join Date: Dec 2006
Location: Melville, Saskatchewan
Posts: 9,140
Thank you!
I occasionally get asked when I'm filling the tank on my '67 Delta 88 what kind of mileage the car gets. I always say, who the hell cares??? I tell them 2 or 3 miles per gallon on a good day when I'm going down hill with the wind at my back.
I put maybe 500 miles a year on the car. That's like 2 or 3 tanks of gas a year. I couldn't care less about mileage. You don't own a car like this because you're concerned about mileage. That's what the Honda Civic back home in the garage is for.
I occasionally get asked when I'm filling the tank on my '67 Delta 88 what kind of mileage the car gets. I always say, who the hell cares??? I tell them 2 or 3 miles per gallon on a good day when I'm going down hill with the wind at my back.
I put maybe 500 miles a year on the car. That's like 2 or 3 tanks of gas a year. I couldn't care less about mileage. You don't own a car like this because you're concerned about mileage. That's what the Honda Civic back home in the garage is for.
October 11th, 2017, 04:54 PM
#31
Out of Line, Everytime😉
Thread Starter
Join Date: Dec 2006
Location: Melville, Saskatchewan
Posts: 9,140
Exactly, I would much rather have this little Olds 260 than a sbc. Anyone who says you lose one or maybe two mpg by switching to a 350 is FOS. I got 21 with the little 260/ TH350 and 2.78 gears in my 70S. I only got 19 mpg with the Olds 350/TH2004R and 2.78 with carb leaned right out in the 70S. Usual 10% Ethanol regular with the 260, non ethanol 91 premium with the 350, even making the gap biggef. The mpg in this last drive with the 88 CSC were non ethanol 91.
October 11th, 2017, 09:51 PM
#33
Out of Line, Everytime😉
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Join Date: Dec 2006
Location: Melville, Saskatchewan
Posts: 9,140
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