Cam for 520
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Junior User
Joined: Jun 2002
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From: Trivoli IL
Cam for 520
I need a suggestion on a cam for my engine it is 460 bored .030 and has a 4.300 stroke crank in it and has 10.8 compression and ported dove heads with 2.19 intake valves and 1.76 exhaust valves it has a weiand stealth intake with a 850 carb
Max rpms will be 6500 and it is going into a pulling truck that has 35" tires and 4.56 gear with a c6 and 2800 or 3000 stall converter and weights 6000 lbs
The truck will be driven on the street to
Max rpms will be 6500 and it is going into a pulling truck that has 35" tires and 4.56 gear with a c6 and 2800 or 3000 stall converter and weights 6000 lbs
The truck will be driven on the street to
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From: Nevada
Cam for 520
Any class restrictions? I'm not a puller, but other forums I follow with posts by pullers usually list a lot of restrictions for stock classes, primarily cubic inches. If you don't have any restrictions, then the cam becomes a question of what DOVE heads will flow with 2.19 intake/1.76 exhaust valves and the degree of porting you've done. If you've decided on a 3000rpm stall converter, wise for the street, you want a cam that produces a power curve from say 2500rpm through 6500rpm. That's pretty radical for the street; it won't like off-idle rpms up to about low 2000rpms, but it'll be fun. You didn't mention the valve train, but you'll need roller lifters, guideplates and 3/8" hardened pushrods for 6500rpm. 5/16" pushrods aren't much good over 5500rpm.
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Cam for 520
No dis-respect, but why do you want to use an Automatic? I pulled for years in various classes with several different truck set-ups, but never with an automatic. Automatics are nothing more than a horsepower robbing pump, not to mention the cost. If you do the math, trans ratio X transfer case ratio x ring and pinion ratio = final, your final gear ratio is to tall. A well built FE with a np435 with 4.10s or 4.56s with a 33'' or 35'' tire will pull your doors off. Now you put a standard transmission set-up behind that 520 you'll kick some butt, and probably recieve a few protests. I understand rules and the competion level vary in different parts of the country, but a 520 would never pass here, our club had a pump test, and if you refused to be pumped, you went home. We had a 472 C.I. limit and a minimum vacuum of 10-12. But I wish you luck. 
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Cam for 520
About the automatic thing. Guys around my neck of the woods all run automatics. There are only a select few who run manuals and they usually are breaking somthing. Also where are you pulling at DPW. Where I am from there are alot of run what you brung pulls and there is no whining about anything. A lot of the pulls if someone starts complaining about something they will tell the guy to shut up or pack up and leave. Just a little curious.
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Cam for 520
Forgot about the cam. Call Scott at MPG Head Service/Cam Research. He is very knowledgable about the Dove heads and what cam you need to run with them to make the horsepower.
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Cam for 520
79 Pulling Ford, As I stated in my reply,(I Pulled for years) I don't anymore. I pulled in Wisconsin, and belonged to a Pulling Club which put on 15 to 20 pulls a year, for many different organizations, (County fairs, Lions Clubs, Snowmobile clubs etc.) and as with any type of motorsport competion, the competitors, and the spectators like to see rules for the different classes, otherwise all you have is a free for all. As for breakage with a manual trans, yes you may break a joint or two, but when you build a motor to do a job, you also build a drivetrain to go with it, and a properly set truck with a manual will and has out pulled trucks with Automatics. Just my opinion and experience. Have fun, pulling is an interesting sport. There are a alot of little tricks to this game. 
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Cam for 520
I know what you are saying about rules and I like to see rules in place to, but where I pull there is a couple of differant clubs and 1 in particular nobody has fun pulling with them because they have rules for certain people other than themselves. I agree that you canput horspower to the ground with a manual and you need to set your truck up way differant, but a truck with 5.13's a cut gear in the tranny and the right stall will pull just as good as an manual and will allow for a lot less breakage.
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Cam for 520
Yes, I know you can alter your final somewhat as you were saying. I put a truck together for friend, who insisted on running an Automatic, so what we did was install 5.13s a lower gear ratio planetary gear set in the trans., talked to TCI about a converter which, if I remember correctly was a 9'' unit with a cost of 900.00, put in a floor shifter etc. He was running a real strong 472, 13.1 comp. turbo blue fuel, you know the story. But he didn't do as well as he would have liked, so you can guess what I told him, right, put in the np435, McLeod clutch components, sindered iron disc, 4000lb pressure plate and 4.56s with 35'' BF Goodrich MT's.
Trucks that were beating him when he was running that BIG buck Automatic, were now 30-40 ft. behind. He was real believer after that. You see, 99% of the pullers that we ran against week in and week out ran a manual trans. Never in the years that I pulled, did I ever break a np 435 or a 205 case, nor did I see anyone else break these either. I guess it amounts to, different strokes for different folks.
Trucks that were beating him when he was running that BIG buck Automatic, were now 30-40 ft. behind. He was real believer after that. You see, 99% of the pullers that we ran against week in and week out ran a manual trans. Never in the years that I pulled, did I ever break a np 435 or a 205 case, nor did I see anyone else break these either. I guess it amounts to, different strokes for different folks.
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Cam for 520
You never broke the tranfer case. That is pretty impressive around here guys take the output shafts out all the time. Did you run an aftermarket shaft or even at that do you know where I can get a billet shaft for a 205?
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Cam for 520
You guys must do alot of bouncing, We ran stock cases, and, no I don't know who makes a billet shaft. I told you a little white lie, I had forgot about this, but talking about it jarred my memory. I did see one case break, it was in the super stock class in the days before the quick change transfer cases. It was in a Mopar, this guy would pour the coals to this thing, and all 4 wheels would come the ground, like it was hopping down the track, after the third hop, pow! the cases just exploded, but thats the only one I ever seen fail.
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