i like the comp cams extreme 4x4 myself....210/218 .514 lift on both, 111 lsa

 

Yes that looks like a great cam. I have the Lunati cam on the work bench so I think that is the one I will be using this time.
Perhaps you could run them both on your program and give us a comparison. The onley thing I didn't have in my priveous post was the carb is a performer 1411 and it has the strait up timing.
Thanks
Bill

 

Once I talked with Holley tech about the, I believe #61601 cam for a for 460 for the use & build like your are talking about Bill, and they thought that would be my best bet. You are looking at almost the same thing I'm.
The TORQUE & HP specs you posted would be perfect for me in the fact I pull in that 2500 RPM range. Only pulling steep grades do I run higher. But with 500+ lbs of torque I might not need to shift down into second gear. I also hope if someone has built a big cube, big torque motor that runs on 87 octane PLEASE SHARE.
Darrin, Thanks for all your input, I never stop learning. You have shared some real good stuff.

 

with the 61601 cam id run a little more compression... like 8.7 or 8.8. the bigger cam will bleed off a little more compression and make you revv a little higher. if you dont your mileage will probably drop around 1 mpg, and even though youll make a little more horsepower itll be a little higher up in the rpms. with the 8.5 compression i think the 61600 would be better (or at least a little more efficient)

 

Maybe I should consider a 460 build with about 8.5 compression ratio, A mild cam like the 61600. Then look at putting money in heads like Trick Flow, & Headers. Why couldn't I run the Edelbrock Performer manifold with the 600 CFM Holley maybe have it flowed. Install after market dist, box, coil. Question does Doug Thorley make headers for a mid 80s F250 460?

 

I would suggest you look at http://reincarnation-automotive.com/. Before spending the money on after market heads. Doing a little work on your heads could bee all the help they need for low rpm use. 460 heads are really bad on the exhaust side but a little work can fix that.
This is a picture of my heads before and after.




http://www.dougthorleyheaders.com/

1975-87 F150-350 PICKUP THY-211Y ADD "C" FOR CERAMIC COATING ADD"S" FOR SMOG AIR PUMP APPLICATIONS

THY-214Y-FI1 1988-92 FI. F150-F350 MOTORHOME & PICKUP. 2/4WEEL DRIVE.
ADD "C" FOR COATED ADD "S" FOR SMOG AIR PUMP APPLICATION
I like the Edelbrock performer 1411 (750 cfm) several people have tolde me they haved inproved there milage with this carb and it is easey to tune.
Bill

 

Yea, Scott is the man when it comes to heads, the money to do that could be all I need. The reason I asked about the Thorley headers is I saw a set of header of a 460 on a car lot with headers that on the left side turn toward the right with two tubes so you can maintain a stock routing of exhaust. The right side exited straight back. It appears you could almost weld the stock pipes on to the collectors and be good to go.
I have heard the same thing about the Edelbrock Carb. I could install that on a Performer Manifold.
Thanks, Bill

 

yep, i agree on the edelbrock. i went from a holley 2 barrel on my old dodge to a 1406 edelbrock and saw my mileage go from about 8 to 18 mpg

 

Kermmydog,<O</O

I remberd something at work that I thought I would pass on to you. I am shure you know it already but hear goes. The valve seats on the exhaust valves should be replaced with hardened inserts. The original seats are hardened with a induction process and it isn’t very deep. I was in the back watching the guy do my heads and you could tell. The cutter was turning at a slow rpm and it didn’t make 2 turns before it broke through into softer metal. You could hear the difference. I went ahead and bumped my valve size up while I was at it 2.19 intake 1.76 exhaust with Ferra stainless valves.
Bill<O</O

 

Bill, Thanks for that info I didn't know that. Are the guides like the FE motors a problem also? I remember the 360 heads on the 70s trucks. Guides had to be replaced if you did the valves. It seemed like even if they didn't have a lot of mileage on them.

 

I would have them checked. I had 2 new guids installed because of damage from broken springs. I don't have enough experiance to say how the guides hold up. Perhaps one of our more experianced people can tell us.
Bill

 

I use the Thorley Tri Y headers on my 84 460 4wd F-250, took just a bit of coaxing to get past the starter but works just fine.

BTW, mine is set up with a 210-214 cam, edlebrock performer, holley 670 truck avenger and the dizzy recurved to give full advance at 2500. Currently getting 10mpg with 410 gears. I'm satisfied with the way it pulls the passes in the Colorado mountains.

Jeff

 

i doubt a 12v cummins can be built for 500hp cheaper than a 460. Gigantic turbo or two, intercooler, injectors, pump and whatever else those arent cheap

 

Kubota,
I have that cam in my 79 F250 4x4 460 and LOVE it!

I dont do much towing with it but I can deffinately say what I have pulled seemed easier than my '04 SD V10. Here in SC the roads are pretty flat so hills arent a problem. As far as gas mileage I dont keep up with it. I didnt build this engine with my gas hand in mind. 500+ Ft lbs deffinately help keeping your truck out of 2nd gear though.

 

Well we still haven't had anyone chime in with some real world mileage numbers. I am still interested if someone has used a stroker built for towing/low end torque and what kind of torque and mileage they got. I have seen some of the high horsepower builds that the torque was way up in the rpm range to high to be useful for towing or off road or rock crawling.
Bill