Somebody, please help me with cam advice

[christineman]

I recieved the can for my new 413 with allum head, bired .030, headers, two 500 carbs auto trans.. Is this the best cam for me? I dont mind a little rough idle but mot much. The wife will be driveing too. Want all the perf i can get too. Give me some advice. Do i need a different cam and if so give me some didgets. Its all just numbers to me

Cam Lift int. 298
Ext. 306

Valve lift. Int. 447
Ext. 459

Lobe ctrs. Int. 112
Ext. 118

Sae dur. Int. 302
Ext 324

.050 dur

Int. 213

Ext. 225

 

[99ss]

seems a little small for a 400+ cubic inch engine but its all about how the heads flow

 

[lewtot184]

that's basically a stock magnum cam ground on a 112 lobe separation vs the stock magnum ground on 115 lobe separation. it should idle smooth and drive nice with a performance very similar to a stock magnum cam.

 

[62 Dart Convertible]

Mate, no offense intended, but you seem to be going around in circles.

You asked the other day for advice in another thread, didn't answer half the questions asked of you, and after seemingly making a choice, here you are again asking the same vague question.

Again, I'm not trying to be rude, but suggesting how you go about making your choice.

You have chosen a very conservative cam. If your main priority is excellent street manners, you've made a good choice. If you are willing to sacrifice a little of that streetability to make more power, there have been several excellent choices suggested to you.

Cam choice is always about compromise.

Want excellent idle and low speed response? Then pick a cam not far from stock, and you can't expect huge top end. Want lots of top end? Then pick an aggresive cam, but don't expect a docile idle and great street manners.

It's up to you to decide where in between those 2 extremes the rest of your motor and your expectations lie.

 

[christineman]

Sorry for the questions but ive been second guessing myself and want to be possitve before i put the engine together, so i thought id as for some more opinions. I wont bother about it anymore, but thanks to all for your time and advice

 

[99ss]

Hey now... don't stop asking questions that the only way to learn. Just listen to what people are posting up for advice. choosing the cam is a tough deal.

62 dart stated is right about the characteristics. You just need to decide how you want the car to drive. If you want docile then you made a good choice. If you want so0mething radical you need a different cam. If you have decent flowing heads you can do a 224 intake duration and still get some decent manners out of it. Have it ground on like a 114 lsa...

 

[Meep-Meep]

My recommendation is to first choose a cam based on the lobe separation. For a slight tweak over stock stick with a 112 degree and not less that 110. 114 - 115 is pretty much a stocker, but if you want just a little more punch in the upper mid range use the 112. A cam on the longer lobe separation will idle better and have better vacuum because it has less overlap (lobe separation and overlap are tied together). A cam on a short LS will produce more peak torque but at a higher RPM. It will also idle lumpy, have low vacuum, require a lot of initial timing and out of the box carbs usually need a lot of tweaking to make work. But the engine will come on hard and pull like a freight train. I'm running the MoPar .455 / 272 in my 440 and so far I love it.