Ok guy's I know this topic has been touched in many ways before but what I want is some help designing the motor that I'm going to build for my Dually this winter.
What I have is an 85 F350 Dually. Besides the 460 it has a C-6 transmission with 4:10 gears with 235/85R16 tires. I have Hedman Headers that are 1 3/4" with 3" collectors with 2 1/2 exhaust all the way to the back with Summit Turbo mufflers on them. I use this truck to haul my 24 foot enclosed car trailer with my race car to the track. I also want to be able to cruise around in it around town & some possible long trips on the interstate with it. When I haul the race car to the track I have some real hard pulls up various mountains on the interstate, the interstate speed limit is 65 MPH. I usually don't get the engine above 3000 RPM at ANY time. Even on the interstate when I'm towing the car I don't like to get the truck above 60 MPH which in turn still keeps the RPM's below 3000 RPM.
What I want is help designing an engine that will Tow well & will get the best gas mileage you can get from a 460 whether it is loaded or unloaded. I know that those two words can't be used in the same sentence with a 460, but what I'm looking for is advise from some of the engine builders on this web site.
What I want to is later on add a Gearvendors overdrive unit behind the transmission if that will possibly help the gas mileage as well. I also haven't ruled out changing gears as long as it doesn't hurt the Tow ability.
The heads that I'm using for this will be low compression D2VE heads that if you'll say so I will port & polish.
As stated before, the D2VE heads do not have a quench pad, and will ping and detonate with what you are planning to do.
I would like to add it would be good to get these heads:
All you need is the Stage I heads with Inconel exhaust valves. I would spend a little extra and get the chambers polished and have a singh groove machined in.
This Engine is not for Horsepower it will be for Towing & also to get the best gas mileage for this setup.
Here's what I'm wanting some help with the design of this:
What is going to be the best Compression ratio for this? 8 to 1 compression.
What is the best Cam for this setup? Elgin E-1160-P
Do I want to add coatings to the engine block & internal parts? No.
What is the best intake? A factory C8VE intake
What will be the best Carb size & type carb for this setup (vacuum or mechanical secondaries)? I'm partial to mechanical secondaries. Have Bob at Competition Carburetion build you a carb.
Should I zero deck the block? It would be better to have the piston sticking up above the deck by .010-inch.
Should I use Stainless steel valves? On the intake side yes, and inconel on the exhaust side.
Should I use Roller rockers? No.
Should I use a Windage tray? No.
What type of bearings should I use? Fully grooved.
What type of Rings should I use? Plasma-moly on a ductile iron base.
What type of of oil & what viscosity should it be? 20-50 oil.
Should I Bore the block if it doesn't need it & if I don't can I use the stock pistons if I don't? You need to bore and hone and install new pistons.
If I do bore the block what type of pistons should I use? KB hypers.
Should I use an EGR system? No.
Factory exhaust manifolds, bolted directly to the heads, with your pipes into 2 1/2-inch Magnaflows.
I've built plenty of Race motor's but I've never looked at doing something like this so I want all the help I can get! Also this is a Non Catalyst truck so it doesn't have any emissions equipment or have to pass any test. I would like for this to run off of regular or at the most mid grade unleaded. Is there anything I should add to this setuo to help the Towing and gas mileage?
Before anybody answers this post with a response of l"ook at the builds in the archives" I want this to be a specific build not a generic build , so that's why I'm posting this here. I have a lot of respect for guys like Cale and other specific engine builders on here that do this for a living. I will also say that I'm going to do this build myself so that's why I'm picking brains here.