Hey all,
Im thinking about putting a Comp Cam into my 460. Ive heard the term mild cam before. What does this mean? I was told that if i also change my cam, it would make the exhaust have a explosion pop sound instead of a rumble. How big or what of a cam would do this? Im also trying to understand all the numbers on this. It say Duration @ .050" intake is 253 degrees and exhaust is 253. Lift intake is .585" and exhaust is same. What does all that mean? How big would be too big? Cause i know that if its too big, the engine will stop if your foot is off the accelerator. Thanks a lot everyone!
Danny

 

Unless you have some seriously ported heads and higher compression etc.. etc.. etc.. that cam will make your engine run like crap at all RPMs. The cam by nature will not let the engine make any low end power and the stock heads, intake etc. will not breath at higher rpms.

 

DRanchero

Go to some of the camshaft manufacturers web sites and look around.

They usually have information that can steer you in the right direction for your application.

www.cranecams.com
www.compcams.com
www.edelbrock.com

 

For a big block driven on the street look for something in the .5 to .525 lift range, 108 to 112 lobe centers, and 280 degrees advertised duration (around 230 @ .050). anything much less than that and it won't have the sound you are looking for; anything more than that and you will HATE trying to live with it on the street! Superdave's recommendation about checking with the manufactures is a very good idea - all the numbers work together to accomplish different things, like sacrificing torque for horsepower (or vise-versa), where the power band peaks, etc... Their techs can tell you exactly what to expect from thier stuff. They will ask specific questions about how the truck is used, be honest with them and you will be a lot happier with it - don't just go for overkill!

In order for it to work well at the least you will also need a good Intake, Carb, and Headers. You will need a little higher stall-speed converter if it has an automatic tranny.

Be prepaired for lousy gas milage (ya wanna play ya gotta pay!) and very little vacuum at idle, meaning no power brakes unless you buy a vacuum pump to run them - the engine won't produce enough to do it.

Have fun!

 

Ok well I guess i should have told you guys everything else. Im getting edelbrock rpms heads, im going for a 2x4 intake with 2 750cfm edelbrock carbs ( if not just a performer rpm edelbrock with one 750) ,and im still debating on brands of headers. So what else would i have to do to make the cam work?

 

2nd Job for fuel....

 

I looked it up on the compcams website, and it looks like the rpm range for that cam is 3000 to 6800. They recommend a 3500+ stall torque convertor. It'll work for street if you like getting 3-4 mpg and idleing the engine at 2500. I'd send it back and get a milder one. Their 34-226-4 looks about right.

 

D Ranchero- What are you going to be doing with this 460? Your application will determine your engine build. Bigger is not always better.

 

Yeah, that sounds like a pro-street buildup. There's nothing streetable about 2 carbs, but at least you didn't say you're strapping them to a tunnel-ram intake. 1 carb is the best setup for performance, unless you're supercharging that thing. It's very time-consuming and expensive to build a motor that can actually use more fuel than a single 750 can provide. It's a wallet-stoker: displacing cubic dollars! Seriously, listen to ratsmoker and pick a reasonable cam with a good dual plane intake, single 4bbl, and a set of good heads. 2 carbs on a 460 will consume fuel like no other, and talk about an ill-tempered beast! Yeah, it's cool on friday night, but how about monday morning driving to work? If you want more torque than a quality-built 460, you should look into diesel-electric or nuclear reactors. TK

 

Is your truck 4x4, how much does it weigh, auto or manual, what are you going to do with it?

PART NUMBER: 4-235-4
ENGINE FORD 429-460
GRIND # FF X4 262H-11
DESCRIPTION STAGE I
INT EXH
VALVE ADJUSTMENT HYD HYD0
GROSS VALVE LIFT .514 .524
DURATION AT
.006 TAPPET LIFT 262 270
VALVE TIMING OPEN CLOSE
AT .006 INT 24 58
EXH 70 20

THESE SPECS ARE FOR CAM INSTALLED
AT 107 INT C/L
INT EXH
DUR AT .050 218 226
LOBE LIFT .2970 .3030
LOBE SEPARATION 111.0 INT MASTER ID 5432
ADVANCE 4 EXH MASTER ID 5414
RECOMMENDED CC VALVE SPRINGS 926-16

That is the cam that comp recommended for my application which is a 460 KB 10.3:1 flat top pistons, roller rockers, bored 030, balanced, Performer intake and stock D3VE heads and 1 7/8" headers.

I will be installing that cam when I have my exhaust ports mildly done and the smog bumps removed. Right now I am running the above engine with a Performer cam. With that setup I am running 95 in the quarter with a 4.10 gear and a 7000# truck 4x4. It will also pull a trailer like that ain't nothin back there.

I think the the same cam will probaly be what you are looking for.