High Compression E85 401 Build

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.

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.

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!

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. 

farna wrote: Get rid of the Torker intake.

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