Help me with some cam info guys,,,

[christineman]

Im building a 413 for a 64 fury, Boring .030, steel head gaskets, two 500 carters on a factory cast manifold, 323 gears, auto trans, dsi, and now i need a good 0-80 mph cam. I bought some nsra aluminum heads off eBay for 900. I know the heads are 72cc. If u need it, i can get more specs if u need them. Id like a cam similar to the 440 gtx cam in the late 60s. Very streetable . So., now that u have heard what i want, give me some specs please for a nice cam. I really could use some advice. Or maybe something i could change to get some HP??

Thanks in advance

Christineman

 

[Kern Dog]

What you say you want is still available. Mopar Performance still sells the 440 Magnum cam.

 

[Meep-Meep]

I'm running the next cam up from the Road Runner cam. It's the .455" / 272 on a 112 lobe separation. 12" of vacuum at idle and crisp throttle response with 10:1 CR.

 

[Roadbird]

I'm running the next cam up from the Road Runner cam. It's the .455" / 272 on a 112 lobe separation. 12" of vacuum at idle and crisp throttle response with 10:1 CR.

Would this cam work well with a 426 Wedge?

 

[RustyRatRod]

If you are running adjustable rockers, the MP 528/284 solid is an EXCELLENT choice for what you are looking for.

 

[62 Dart Convertible]

Im building a 413 for a 64 fury, Boring .030, steel head gaskets, two 500 carters on a factory cast manifold, 323 gears, auto trans, dsi, and now i need a good 0-80 mph cam. I bought some nsra aluminum heads off eBay for 900. I know the heads are 72cc. If u need it, i can get more specs if u need them. Id like a cam similar to the 440 gtx cam in the late 60s. Very streetable . So., now that u have heard what i want, give me some specs please for a nice cam. I really could use some advice. Or maybe something i could change to get some HP??

Thanks in advance

Christineman

It would help to know what pistons you are using and what your CR will be (as the piston choices for the 413 are few).

As Rusty asked, do you have adjustable rockers? Would you prefer solid or hydraulic?

Will the intake be a crossram or the inline dual quad?

 

[Meep-Meep]

Would this cam work well with a 426 Wedge?

Sure would. You will need a heavy duty single spring with damper installed at factory height (100 lbs of seat pressure) and I recommend either the iron adjustable rockers or a comparable roller tip with 3/8" push rods. Some rollers are priced pretty well these days but make sure the quality is good. Valve to piston and retainer to guide clearance will not be an issue but good to check anyway. Compression should be 9.5 - 10:1. The stock intake from a 440 will work great or upgrade to an aluminum dual plane like an M1, Performer, or an old CH4B.

 

[christineman]

I want hydraulics for sure. As i said, the heads are 72cc. I can go the short ram tubes or cast on line manifold which ever is better Can u give me some idea of what specs i should ask for in pistons to get maybe 9.5 cr? And with that, what cam should i use? Maybe the old gtx cam is best, i just dont know. Not too good at all this tech stuff and sounds like u r.

Thanks
Mel

Please pm me if you need to.

 

[lewtot184]

i picked up a summit 6401 camshaft the other day and got a chance to run it thru the degree wheel. it's a crane hp280/290, (pretty sure). anyhow, i think it would be a decent upgrade from the stock magnum cam but still drive nice. the intake lobe is just a tick more than the 272-.455 lobe, a solid step better than the magnum intake lobe. the summit exhaust lobe is a solid step better than the 272-.455 lobe, and probably a step and half better than the magnum lobe. only $65.

 

[Meep-Meep]

On a 426W you can get 9.5:1 with a closed chamber head at 79 cc's, a zero deck piston with two valve reliefs (don't recall the volume but it isn't much) and a Fel Pro composition gasket (.035" compressed). A steel shim gasket might be worth 1/4 point.

 

[62 Dart Convertible]

I want hydraulics for sure. As i said, the heads are 72cc. I can go the short ram tubes or cast on line manifold which ever is better Can u give me some idea of what specs i should ask for in pistons to get maybe 9.5 cr? And with that, what cam should i use? Maybe the old gtx cam is best, i just dont know. Not too good at all this tech stuff and sounds like u r.

Hi Mel. We have a few similarities.
I am currently rebuilding a .060" over 413 (so it's now 4.25" bore like a 426) with 11:1 TRW MW pistons. Just stock 324 iron heads - haven't CC'd them yet. It is a factory dual inline quad with adjustable rocker gear and was running the MP solid cam Rusty (who knows his ****!) mentioned above. The cam was good IMO, but I couldn't judge it fully as I had other problems. Going in it though is a Lunati Voodoo 268 hydraulic. Hydraulic for less valvetrain noise and no lash adjusting.

Where do you plan to get your pistons?

 

[christineman]

I went with the GTX cam. Decided to play it safe. I hope i made the right decision on the
Pistons. I hope someone can tell me if i did. I went with 10:1 comp pistons, the comp height is 2.0156. My heads r 72 cc. My delima is should i use steel or compost gaskets and what compression ratio i will have with each gasket ?!

 

[Meep-Meep]

Not a bad cam choice. With your target compression you should fall in the 170 PSI range of cranking pressure, which will make for a good running pump 89 octane motor. The compression difference between the steel shim and comp gasket is about .4 point on a 440. On a 426W maybe a tiny bit less.

 

[62 Dart Convertible]

Now you have the cam sorted, which way are you going on intake?

A crossram sure looks great, but I can't see the point from a performance pov with such a mild cam.

A single carb/manifold like Meep-Meep said is the best choice functionally.

For dual inline, a factory piece is great if you have one, otherwise hard to find and pricey. Edelbrock CH-28 is a better manifold choice if you have the hood clearance.
But would it perform better than a single? Probably not...

 

[christineman]

Thanks to all of u for the advice and sharing your knowledge. It is greatly appreciated

 

[christineman]

How is the idle compared to the factory GTX cam?

 

[christineman]

Sure would. You will need a heavy duty single spring with damper installed at factory height (100 lbs of seat pressure) and I recommend either the iron adjustable rockers or a comparable roller tip with 3/8" push rods. Some rollers are priced pretty well these days but make sure the quality is good. Valve to piston and retainer to guide clearance will not be an issue but good to check anyway. Compression should be 9.5 - 10:1. The stock intake from a 440 will work great or upgrade to an aluminum dual plane like an M1, Performer, or an old CH4B.

With 2.0156 pistons and 72 cc alluminum heads, am i going to have any valve relief problems with steel gaskets or should i use composits??