Joined: Tue Mar 12 2013, 11:31AM
Location: Germany
Posts: 70
I'm searching a good camshaft for my 400 cui. It was a 2 bbl engine. It now has a 4 bbl Carter, an Edelbrock Performer Intake and Stock Heads & stock exhaust manifolds. But I do have a dual exhaust without x-pipes. I thought that a Edelbrock Performer Plus cam would be a good choice because of the Performer intake. But maybe I'm wrong. I searching for a cam that brings me more torgue and power from idle on. I don't need power at 6000 rpms. And would be great if I could use the cam with stock heads and stock valve train.
With a little "home work" you will find out The Lunati and Comp Cam Shafts mentioned are copies of MoPars Cam Shaft used for a Standard Spec'd 1970 440 or 383's.
Yes - since you will have this area open --- do the new Timing Chain.
Joined: Sat Aug 19 2006, 05:03PM
Location: Ontario, Canada
Posts: 2919
Both the Comp XE series and Lunati Voodoo series are supposed to have faster ramps to take advantage of the Mopar's larger diameter lifters versus most cams, which are based on Chevy profiles. I have also read that the Voodoos are former Ultradyne grinds, and Ultradyne was highly recommended when they were in business.
From the pages that Krautmaster linked, the Voodoo is a cam+lifters kit, and the Comp is not. They list their cam+lifters kit at $220. Of those two cams, I would go with the Voodoo. It has a 112* LSA and I know Comp likes to grind 110* LSA for everything. A wider LSA should give you a better idle. Here's a page for the Comp cam with specs: http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=705&sb=0
Don't buy the timing set until you pick a cam. If I recall correctly, Voodoo cams use 3-bolt timing gears (like a Hemi), while Comps use 1-bolt plus alignment pin like most B/RBs.
Joined: Tue Mar 12 2013, 11:31AM
Location: Germany
Posts: 70
ok. I will go with the voodoo cam + lifter kit. and therefore a new timing set with 3-bolt. should I take the 256/262 for 1000-5000rpm or the 250/256 for idle-5000. and how do I break that cam in properly?
As you are looking and learning about Cam Shafts - do match their data with what your usual/ normal type of driving is.
Is it a lot of City and sometimes 75 MPH Plus or is it a lot of 75 MPH Plus and some city driving only when you are traversing to there.
The Torque is used under 75 MPH Vehicle Speeds. This means a solid 55 MPH to 75 MH is 2200 to 2600 RPM's. Match this with what you drive at and The suspension of the vehicle.
If you install a Cam Spec'd for 75 MPH Plus driving - you will find out - the vehicle is not very good with most seats used when you are driving around the city. As you can see - it is "a trade off".
............................ The Exhaust Manifolds and Exhaust System that you have --- flow equal to a set of 1970's best RR/ GTX or what ever Exhaust Manifolds.
Either cam will work.On a 400 in a C body with highway gears I would go with the smaller cam.I would add that you should replace the valve springs as well.You may get by without them but I wouldn't run a 40 year old set of stock valve springs on a new cam. You can use the same rocker arms and pushrods.