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High Compression E85 401 Build |
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muttnïk
AMC Fan Joined: Mar/14/2012 Location: Detroit, MI Status: Offline Points: 7 |
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Posted: Apr/04/2012 at 9:31am |
I am just getting started on a 401 E85-only build. I am looking for more information and experiences from people who have built naturally aspirated high compression engine for use with E85. Cam selection is one area in particular where I still have questions. I want to maintain driveability and low end grunt. Here is an overview of the current plan:
Truck is a '79 J-Truck used as a tow rig / daily driver.
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Javelin74
AMC Nut Joined: May/18/2010 Location: Scottsdale Status: Offline Points: 398 |
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Interesting project you got there. Good luck! You may need to search around on some other forums for that type of info regarding E85 information. I'll be following this with a lot of curiousity.
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billd
Moderator Group Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
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My wife asked me why I did not do that when building the Eagle's 4.0.
I said I might try on another engine build - I've got a couple other engines to play with. (and if I can locate a cheap 4.0, it will go into the wagon and I might do an E85 build on that) I'll be watching to see how you progress here. |
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tsanchez
AMC Addicted Joined: Jul/09/2007 Location: Arizona Status: Offline Points: 4303 |
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For camshafts e85 generally does well with 10 degrees more duration than with gas but as a tow rig with that much compression you may get into preignition quicker. I would contact Tim Cole at comp cams and discuss your goals with him and see what he thinks.
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jcisworthy
AMC Addicted Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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Dont know if its what you are looking for but I have a brand new solid lifter Comp cam for 100 dollars. I went with a bigger one. Justin at race on e85 has a lot of knowledge about it. I am converting my car in a couple of weeks.
http://raceone85.com/
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farna
Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19676 |
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Get rid of the Torker intake. It's primarily for making high rpm power. Best for towing is an Offenhauser 360DP (http://www.summitracing.com/parts/OFY-6056DP/). Even a factory iron intake will be better for towing. Don't do anything but clean up the bowl areas of the ports. Small ports work better for low rpm power. Some of the Jeep rock crawlers have even been using 304 heads on 360s. The small ports increase low rpm power, at the sacrifice of high speed power (say over 3500 rpm), but they don't need power way up there. Revving the engine up then grabbing something is a quicker way to break axles and such than low end grunt. Since this is a street vehicle and you need more volume with E85, I wouldn't recommend something so drastic as 304 heads. With regular gasoline it might be worth it. Everything else looks good to me! I second calling Comp or Crower to ask about cam selection -- need a pros advice there!
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Frank Swygert
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RADAMX
AMC Apprentice Joined: Jul/09/2007 Location: Tucson Az. Status: Offline Points: 188 |
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I swapped my race car over to E-85 .It is 13 to 1 comp .
EFI
Runs good Pulls a couple hundred more on the stall.
One thing is when it is cold outside it is a mother to start.
not sure what that is all about .
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smills61074
AMC Nut Joined: Feb/05/2011 Location: savanna, il Status: Offline Points: 270 |
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I posted a threat quite a while ago concerning E85. Although it is a great idea, it is difficult to get gas that has a consistent mixture. This will affect timing, detonation, etc. I was dissappointed in the answers I got from everyone, but realize that unless it is a full blown race motor, the cost versus the performance is hard to justify. The end result is cheaper gas, but you have to test each batch and adjust the octane accordingly. I live in the midwest where there are plenty of E85 stations. Please keep that in mind when you do your build. E85 typically uses about 30% more fuel to get the same horsepower. So, a 93 octane motor is what I am building. I hope this helps you in your decision.
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68 Blue AMX Perfect California Body going for 401/6 speed
1 1/4 ton Power Wagon Ex Colorado Brush Truck 2006 Caddy CTS V with LS2 and manual trans Corsa Exhaust Beater car (daily driver) |
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tufcj
Supporter of TheAMCForum Supporter of TheAMCForum Joined: Jul/10/2007 Location: Watkins, CO Status: Offline Points: 4086 |
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You may want to re-think the 3.54 gears or go with smaller tires. 3.73s or 4.10s would be better with 33" tires. Even building the engine for low-end grunt, your RPMs will be too low at cruise. Google a "gear ratio calculator" and play with ratio vs. tire size.
Bob tufcj |
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69 AMX
74 Javelin AMX 67 Rogue If you need a tool and don't buy it... you'll eventually pay for it... and not have it. Henry Ford |
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muttnïk
AMC Fan Joined: Mar/14/2012 Location: Detroit, MI Status: Offline Points: 7 |
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The Torker was not initially my first choice for this build. I was originally thinking the Offy 5917 Equa-Flow. The Equa-Flow almost looks like a MultiPort-Injection intake with its massive plenum and short runners. I had not considered using a dual-plane intake for this build. Since it is a dry-runner, my "build tech" and I decided on single plane and were not as concerned with runner velocity and keeping the fuel in suspension. Also, my throttle valve at this time is a 2-barrel. This project was originally going to be built with a 360 and the throttle valve I have is from a Dodge 5.9 Magnum engine. Once it is running I was going to watch my vacuum readings at WOT to see if the throttle body is providing enough air. Seems like the 6056DP would require a 4-barrel throttle body assembly? What is your opinion of the 5917 or other single plane intakes for this application? This is my first attempt at a multi-port injection conversion and I certainly do not have all the answers.
Edited by muttnïk - Apr/04/2012 at 1:21pm |
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