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Old August 1st 2008, 09:02
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MPG thread

I was searching the site and couldn't find any concrete information. I think we should start a Subaru sticky for what mpg you are getting out of your conversion. I figured we could make a layout similar to how you show off your car. I wanted to start this thread to save a lot of search time to find rough figures.


I figure if we set it up stating what engine you have and how it is modified, if its modified. List your transmission and R&P gear ratio along with how you drive it.

I am looking to build a Subaru powered daily driver and am trying to figure out how to get the best of both worlds. So whoever wants to start lets get this thread going!
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Old August 4th 2008, 00:55
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Hi

I'm doing a Subi conversion as well. Most people I know down here are getting around 9 litre per 100ks with EJ20 turbos on a trip.

Off subject, I just did a road trip with my daily 1303, stock 1600 twin port, headers and 009. I measured the fuel consumption with me driving doing the speed limit up to 110 kph, 9 litres per 100ks, my son who is a learner driver and is limited to 80 kph did 7.5 litres per 100ks.

Steve
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Old August 4th 2008, 22:04
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A quick translation for all of us not up on our metric system.

Steve C approx 26mpg
Steve's son 31 mpg
So it looks like staying at 80kph(50mph) gets you better mileage with a stock engine.
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Old August 5th 2008, 01:10
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Quote:
Originally Posted by yellrhd View Post
A quick translation for all of us not up on our metric system.

Steve C approx 26mpg
Steve's son 31 mpg
So it looks like staying at 80kph(50mph) gets you better mileage with a stock engine.
Awesome, thanks for the translation
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Old August 5th 2008, 07:56
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All that assumes US gallons, UK gallons are bigger!
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Old August 5th 2008, 09:09
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Hi

This was just posted on another forum by the owner of a EJ20T powered Type 3 fastback

"Cant complain about fuel economy on my way back from Valla. Give or take a touch after refuel and setting of trip meter. 19litres used for 162 miles, so that equates to 39miles per gallon or 7.3l/100km.

Not bad for a 242hp atw Fasty"
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Old August 5th 2008, 09:17
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Hi

I just found a website that does the calculations for you, so the above Fastback figures are,
7.29 litres per 100 km
32.27 miles per US gallon
38.76 miles per Imperial gallon

Steve
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Old August 9th 2008, 23:10
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Sweet, I talked to a guy on stf and he has a 73 ghia running an ej22. He has a factory transmission which is 3.88 freeway flyer gearing and he said he only turns 2700rpm at 70mph with I believe 18" tires with low pros, so they are just an inch or two taller than stock wheels. So I would imagine he would at least average 32mpg, depending on his driving style.
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