08-30-2020, 10:06 PM
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#11 (permalink)
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Industrial Designer
Join Date: Feb 2009
Location: Milwaukee
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Quote:
Originally Posted by serialk11r
Just how bad is the gas mileage on that thing? It's light and the displacement is fairly modest but the compression ratio is LOW.
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It's ... not great. I try not to even calculate it, other than smiles per mile. I think when I did do it, it was around 22mpg. I do have a dragging front brake, which doesn't help. Once I fix that I would imagine it would be around 25.
Anyway, small update:
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 Today
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Other popular topics in this forum...
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08-30-2020, 11:22 PM
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#12 (permalink)
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Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
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Welcome to air-cooled world. Remember: antifreeze is poisonous to puppies and kittens. Consider this:
Hot VWs magazine took a Beetle from 28 to 39.9mpg with their Mileage Motor build.
It was based on work by Jon Karcey, described in a seven page The Samba thread here: https://www.thesamba.com/vw/forum/vi...er=asc&start=0
The work was carried forward by Jake Raby into the Type IV (912) world: Raby Aircooled Technology – The Most Advanced Aircooled Engines for Vintage VW and Porsche cars.
The Hot VWs series was at CB Performance but now it 404s: https://www.thesamba.com/vw/forum/viewtopic.php?t=97269. Maybe try Internet Archive.
TLDR; square bore/stroke, high reciprocating mass, Hall effect ignition, air dam, Jet-a-Vator, low-friction lubricants, 145s on the front, etc, & etc.
If you don't want to go Type IV, then the Emorys cut flat sixes down into DOHC flat fours. https://www.emorymotorsports.com/the-engine/
Best mileage I ever got with my 1971 Superbeetle was 38mpg over 1300 miles, running through Eastern Oregon in the middle of the night at 45mph, on the way to Bonneville.
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Last edited by freebeard; 08-30-2020 at 11:28 PM..
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08-31-2020, 03:18 PM
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#13 (permalink)
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AKA - Jason
Join Date: May 2009
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Cool project. I hope your user name reflects your bank account.
I started a similar project about 20 years ago on a 1972 914. I was in a front end collision and decided to use the insurance money to to the build I wanted. What I found out in that the Porsche logo adds at least a zero to everything. I started a spreadsheet, priced out what I wanted to do - saw that it was $15,000 - and sold the car.
I kinda wish I had that car today - especially now that they went from black sheep of the Porsche family to red hot appreciation. It is crazy to see them selling for $20 - $30,000 now.
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09-06-2020, 12:44 PM
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#14 (permalink)
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Industrial Designer
Join Date: Feb 2009
Location: Milwaukee
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Quote:
Originally Posted by JSH
Cool project. I hope your user name reflects your bank account.
I started a similar project about 20 years ago on a 1972 914. I was in a front end collision and decided to use the insurance money to to the build I wanted. What I found out in that the Porsche logo adds at least a zero to everything. I started a spreadsheet, priced out what I wanted to do - saw that it was $15,000 - and sold the car.
I kinda wish I had that car today - especially now that they went from black sheep of the Porsche family to red hot appreciation. It is crazy to see them selling for $20 - $30,000 now.
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Nope, student loans keep me pretty freakin' poor until I"m about ready to retire. Hence why I am doing everything I can myself.
Updates: This video is honestly more of a comedy; the fact is the fan SHOULD have slipped off the alternator....but it refused to do so.
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09-06-2020, 07:27 PM
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#15 (permalink)
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Cyborg ECU
Join Date: Mar 2011
Location: Coastal Southern California
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7:22 ...  ... lots of patience went into that effort. 4 days?
+1 for saving and restoring the original hardware. I like the salvage approach most.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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09-08-2020, 01:26 PM
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#16 (permalink)
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Industrial Designer
Join Date: Feb 2009
Location: Milwaukee
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Small update: Drilled out my engine bar to make an RSR style engine bar... rennline sells these for $250. I spent... $20 on some hole saws or so.
Pretty simple stuff, using the paper template is my only protip on this one. |
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09-08-2020, 06:43 PM
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#17 (permalink)
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Cyborg ECU
Join Date: Mar 2011
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Modest weight reduction there. How much?
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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09-08-2020, 08:37 PM
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#18 (permalink)
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Industrial Designer
Join Date: Feb 2009
Location: Milwaukee
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Lol, idk, I'll bring hte scraps inside tonight and weigh them for you.
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09-09-2020, 10:15 PM
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#19 (permalink)
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Industrial Designer
Join Date: Feb 2009
Location: Milwaukee
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I removed 8 ounces from the engine bar, and 3 ounces from the intake runners. :P
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09-10-2020, 01:18 PM
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#20 (permalink)
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Industrial Designer
Join Date: Feb 2009
Location: Milwaukee
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Alright... the most expensive part of my project so far, because i farmed it out: A transmission rebuild. This trans is magnesium case, so a weight savings of 30lbs over the aluminum versions (super rare and desirable!).
I go over the basics of a 915 transaxle, a cross section showing how they work, and some of the upgrades I sprung for during the rebuild.
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