Disagree.

Fuel efficiency is how far you can travel (or how many hours an engine can run, etc.) per unit volume of fuel.

Fuel economy factors in costs.

But yeah, the use of "fuel economy" when "fuel efficiency" is meant is common.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

I have to wonder, if you were to run E85 in an old stocker 60s car that was designed to run leaded fuel, would the E85 eat up the valve seats like regular gasoline does w/o lead substitute in it?

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1984 D100 Shorty Custom
Certified Auto Appraiser - RevItUp Classic Appraisals
President - Cherry City Bombers CC
Part of Tyrde-Browne Racing

Yes, but that would be the least of your worries with E85 on an unmodified '60s car.

Also, even pre-1973 slant-6s are pretty resistant to valve seat recession with unleaded gasoline, and most "lead substitutes" don't prevent recession in engines prone to it.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

So far no problems at all with the E85 in my car. I pulled the head this weekend & swaped a different head on. The engine looks fine and very clean. The inside of my carb shows no problems at all and had no debree or corrosion in anyway. The inside of my fuel filter is not picking up any signs of debree and the only problem I have had so far is my rear tires are taking a beating. The engine is even running much cooler. I dont have a cooling fan on my car and it is very noticable how much longer it take to gain heat at a idle. With the warmer weather coming it was getting to the piont that I needed to install a electric fan soon because of over heating in places like drive throughs. Now it acts more like it did back in the winter.

I have a new engine on the stand, but I am taking it apart to mill the block .100 and I am having the crank offset ground to get the piston up even higher. The head that came off my engine will be milled .130. I will put the new engine in next week and then run my Duel Weber/Offy setup with a big cam. This should be a nice setup for the E85 and should make for a whole new expeirance with the slant as a daily driver. This is the kinda engine I like to run a 4 speed behind, I have a 4 speed setup but need things like a new shifter and better clutch. Maybe next month I will get these things and go with the stick.


I havnt got to do any MPG testing yet because of to many changes going on to have steady testing. Its hard to tell much about MPG when going around and running this thing as hard as I have been doing. Even with gas as a fuel when I ran it like this it would go through some fuel pretty quick even though I had it getting 20 plus MPG when I drove it normal. I will try to do some testing before I change the engine so I have something to compair it to, but for me what really matter is how it does after I change the engine. If I can get the same MPG with the higher compression and E85 as I did with low compression and gas that is all that matters to me , or atleast close. I should be able to do that, and might even get better if I can get the engine just right.


Jess

Nice work Jess. Very good information. I've been thinking of doing another carb for my turbo and E85.

Tis the season for modding slants and making them better I say!

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1984 D100 Shorty Custom
Certified Auto Appraiser - RevItUp Classic Appraisals
President - Cherry City Bombers CC
Part of Tyrde-Browne Racing

Jess, put a switch on your electric fan. You would be surprised how little you will need the fan w/E85. My brothers drag Mustang needs to warm up for about 20 minutes between rounds to keep the temp up where he wants it for consistancy. This winter when I re-painted it, I made a grille cover for it to keep air flow from going throught the rad.

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Chris'
Autobody
Restoration
Service

Agreed.....my electric fan has not kicked on in days with the cold weather and all the snow we are getting. I can drive 150 miles in traffic or freeway and stay nice in warm inside and never have the radiator fan go on.

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Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG

Good to know. I cant put a switch on my electric fan though becuase I dont even have a fan right now. I just drove to the next town & back
( about 40 mile round trip) and it didnt even try to get warm and its 70 degree out today. I guess I will have to put a fan on sooner or later but when I do a temp operated switch will go on with it. I am going to set up a Mega squirt for timing control I can let it control the fan I guess.


It funny the warmer it gets outside the more power I keep making with this fuel. It was the other way around with gas.


Jess

hey all

i gased up this morning with about $40 of ozzie e98 fuel (10%ethanol 98 octane) and was a little shocked .. its a lot smoother and the idle is a little bit lumpier and lower so.. it cheaper at $1.24-1.30 per litre over normal 98 octane .. around 1.34-1.45 per litre ..

it`s running cooler i am not shore on the more power thing because i have not got in to the throttle too much of late i am saving a little cash to do a dizzy recurve then it will be right foot to the carpet ..

yours
the black sheep a little greenier now ... lol

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i like it lumpy

Here is something unexpected, but makes sense. I have been able to tighten my valve lash up from .011/.021 (what I was running) to .008/.017 now with the E85. I also have a new head with hardened valve seats and new valve springs and I am not sure which one is letting me run this tight a lash. It may be possible that with the engine running cooler that the valves are not expanding as much as before.


I am going to try going on down to .015 and if that works try .013, then .011 on the exhaust to see what it does. The intake I dont feel will or should go any tighter than the .008 I am running now, but I might just try .006 to see.


After I changed the lash there was a slight improvment in more power at all RPM.



Jess

Jess,

What cam are you running?
What lift and duration?
Who's profile?

_________________
Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG

Ted,


this is a bone stock slant (its even the stock pistons). The cam must even be one of the early cams because its got less lift than most people say the stock cam is suppost to have. 250 @ the lobe, 350@ the valve. This is the same that every cam I have measures (there all out of old stock engines). This also comes out to 1.4 rocker ratio even though the factory claims 1.5, and other people say the measure out to be anywhere between 1.45 & 1.48. Eveyone I have measured came out to 1.4 on the money. This is with the lash set at .010 int and .020ex . I guess if you add the lash that makes the rockers come out to a higher ratio, but to me what counts is how far that valve lifts.


Jess

Jess,

That's good to know, bone stock.....

With my cam, the 254D .435 lift re-grind it seems to like the looser .012/.022 settings. With all the cold weather and snow we have had the last few weeks I am stuck right at 22.5 mpg plus or minus .1 mpg deviation with a #58 jet and the low idle speed bleed plugged (from Holley) and with my aggressive driving habits.

As soon as the weather gets a little better, I will drill out the low speed idle bleed and hopefully get the low idle circuit running. It is pretty much off or on right now. Hopefully it will get a little better mileage.

Thanks for the info!

_________________
Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG

What will we do when there is a crop failure? Drought? Corn borer? Fungus?

Silly, silly silly..................

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto Dually Clubcab needs a injector pump
2005 Golden Couch Buick