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Eco-Bricks - 35+mpg club

Jeh said:
65 Caddy with a CR of 12.75:1. It got terrible mileage.
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429 cubic inches is what consumed fuel; stock CR was 10.5:1. To my awareness, Cadillac didn't offer "speed shop" parts. In 1970, they offered a 500 cubic inch with 10:1 compression ratio

For Volvo gas based fuel economy, I suspect B18/B20 engines would be better to use, after installing latest Bosch injectors, MegaSquirt, and with 5 speed OD transmission. But, I would check to see if hardened valves/seats were installed in B18/B20 engines. When lead was taken out of the fuel in 1975, OEMs installed hardened valves/seats either then, before, or at a later time.

For existing 2.3 FI engines with LH-2.4, I would suggest Bosch Gen-III injectors

I'm running 89-E10 Fuel with Bosch 0 280 155 746 Injectors (95 96 97 98 VOLVO S90 V90 960 2.9 I6)

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^ :nod: on the B18 or EFI B20

I'm pretty sure my 73 145 parts car would have returned 35mpg at 55mph, or more with an M41.

The 122's and 544's were even smaller and lighter, so they would be a good starting point for a B18A mpg redblock.
 
mbolton1990 said:
btw does anyone know if 240's have dfco(deceleration fuel cut-off?[engine braking kills injectors])
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LH 2.4 - "During deceleration, fuel injector is discontinued above 1,800 rpm in all gears. It is resumed at 1,400 to 2,000 rpm, depending on engine temperature."


Btw, With overdrive, the 1800S got 27 miles to a gallon at 70 mph (with radial-ply Pirelli Cinturato tires).

298278.png
 
1982 242 GLT
B21F M46
3.54 rear
Bosch LH1.0
10w30 Mobil1
205/60/15 @44psi
A/C removed and pw steering lowered.

I average a combined city/hwy 25-28mpg
Strictly city nets 24mpg
Strictly hwy at 80+ nets 28mpg
Strictly hwy at 55-65 nets 33mpg

400 miles to a tank is not uncommon for me with all the criss crossing from Philly to Milwaukee & Eau Claire. Driving with my mtb or adventurer box drops 4mpg easily when driving through the mountains.

Not sure what I could do to net 35. Maybe remove my fog lights, headlight covers, change the airdam...
 
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wisturbo said:
1982 242 GLT
B21F M46
3.54 rear
Bosch LH1.0
10w30 Mobil1
205/60/15 @44psi
A/C removed and pw steering lowered.

I average a combined city/hwy 25-28mpg
Strictly city nets 24mpg
Strictly hwy at 80+ nets 28mpg
Strictly hwy at 55-65 nets 33mpg

400 miles to a tank is not uncommon for me with all the criss crossing from Philly to Milwaukee & Eau Claire. Driving with my mtb or adventurer box drops 4mpg easily when driving through the mountains.

Not sure what I could do to net 35. Maybe remove my fog lights, headlight covers, change the airdam...
Click to expand...

Sequential fuel injection accompanied by weight reduction.
 
Any aero mods would help alot at speeds over 45mph,go onto ecomodder.com all this is covered there.35mpg hwy is not unrealistic by any means,get a mpguino to help find the 'sweet spots',after installing one in my crx hf I could never get over ~53mpg,on my first outting I got 62mpg,'nuff said.
 
wisturbo said:
1982 242 GLT
B21F M46
3.54 rear
Bosch LH1.0
10w30 Mobil1
205/60/15 @44psi
A/C removed and pw steering lowered.

I average a combined city/hwy 25-28mpg
Strictly city nets 24mpg
Strictly hwy at 80+ nets 28mpg
Strictly hwy at 55-65 nets 33mpg

400 miles to a tank is not uncommon for me with all the criss crossing from Philly to Milwaukee & Eau Claire. Driving with my mtb or adventurer box drops 4mpg easily when driving through the mountains.

Not sure what I could do to net 35. Maybe remove my fog lights, headlight covers, change the airdam...
Click to expand...

Thats a nice setup right there. Too bad they didnt make the B21 with the low friction design features of the B230, it would probably be knocking on the 40mpg range or more.
 
84B23F said:
Have you considered tracking on Fuelly

It assists in documenting a person's claim...
Click to expand...

I have envelopes of gas receipts in chronological order for every car I've owned and every single time I've put a fuel nozzle to it. I don't need the internet to verify it. I'll just let anyone read all my hand written mileage and tank totals in the glovebox.
 
Lord_Athlon said:
Without being able to tell lh what to do
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89-E10 Fuel with Bosch 0 280 155 746 injectors works fine in my 1993-245-AW70 with LH-2.4.

From literature on a higher flow rate injector, 24 lb., "...they are linear and controllable at low pulse widths." Translation, better overall fuel metering....electronics isn't the issue, but injectors with a "true" response from computer.

YMMV, but on this vehicle, I'm glad I switched to Gen III Bosch injectors; well worth it. I gained about 55 extra miles per tankful.
 
Lord_Athlon said:
Again. You have no idea how efi works...
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In a nut-shell, theoretical underpinnings are AMM in conjunction with O2 sensor refine the open-loop pulse-width maps during closed-loop operation. Injectors/FPR/etc are not perfect, so ECMs/ECUs had to have a means to adjust flow (aka pulse width).

Btw, I plan on using Bosch 0 280 155 746 injectors on Rex-I/Regina on my 1993-944; I'll report back after they are installed, with fuel mileage data.
 
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