[dmac]

Originally Posted by pastry_chef

Lunati Voodoo 10510702

----------------------------
Hydraulic Flat Tappet Cam. Great torque monster for 400-455 c.i. daily driven street performance vehicle. Excellent torque and HP production with heavier emphasis on the low to mid range.

Advertised Duration (Int/Exh): 262/268
Duration @ .050 (Int/Exh): 219/227
Gross Valve Lift (Int/Exh): .468/.489
LSA/ICL: 112/108
Valve Lash (Int/Exh): Hyd/Hyd
RPM Range: 1300-5500

Just a little too much lift with the 1.6 rockers I already have and need to use.

[ponyakr]

"...I want peak power at maybe 3000-4000 rpm..."

A cam that small would probably have less than 210 dur @ .050.

That makes the Summit 2800 your best choice.

I've never seen a dyno test of a low comp 400, with this cam. But, I'll just guess that the torque would peak at somewhere between 2000 & 3000 rpm, and the horsepower would peak at 4000 rpm or just a hair less. It would have a dead smooth idle & plenty of vac. Would probably run completely out of steam at, or just below 5000 rpm.

I wouldn't go any smaller than an 068 clone. But the Summit 2801 is cheaper, with more lift. So, since price is a concern, I'd say the 2801 is your best choice, for use with your Rhoads lifters & 1.6 rockers.

[dmac]

Originally Posted by ponyakr

"...I want peak power at maybe 3000-4000 rpm..."

A cam that small would probably have less than 210 dur @ .050.

That makes the Summit 2800 your best choice.

I've never seen a dyno test of a low comp 400, with this cam. But, I'll just guess that the torque would peak at somewhere between 2000 & 3000 rpm, and the horsepower would peak at 4000 rpm or just a hair less. It would have a dead smooth idle & plenty of vac. Would probably run completely out of steam at, or just below 5000 rpm.

I wouldn't go any smaller than an 068 clone. But the Summit 2801 is cheaper, with more lift. So, since price is a concern, I'd say the 2801 is your best choice, for use with your Rhoads lifters & 1.6 rockers.

I came to the same conclusion so far with your help. The 2801 ran great in a 10:1 cr 400 I put together a few years ago with just a little rumble. With addition of the rhoads, it should idle a lot smoother and be mild enough to hear the stereo on the highway.

I sold that car to a friend who really just wanted the body. I may even be able to get that same cam from a few years ago. The guy ran the car with the 2801 for about 20 minutes before tearing into it. He ended up with a 464 stroker, aluminum heads, and stump puller. I guess for $73, I shouldn't even think about using a used cam, even if it only ran for a short time.

[SMW]

I ran the Crower 60916 and Rhoades lifters and 8.8:1 compression and the car idled with 18 inches of vacuum. Idled very smoothly. The duration is 221/229 at 0.050. The Rhoades are said to reduce duration by 10 degrees at low speeds. That would put the duration at 211/219. The 2801 cam with regular lifters is 214/224 at 0.050. I had a Rhoades lifter go bad so I bought a new set and there are 5 bad lifters in this set. One did not have the oil hole drilled all the way through. I called Rhoades about the hole not being drilled and he sent me a replacement. I asked about why the lifters looked different that the 10 year old lifters I had and he told me he got a new supplier. When I got the engine running there were four more that were clacking really, really loud. I have not been able to get anybody from Rhoades on the phone so I am going to switch to the 2801 cam. Be careful about the new Rhoades lifters.

[ponyakr]

That's really bad news about the Rhoads lifters. They have been using the Hylift Johnson cores. Never had any problems with even one.

I suppose this may mean that they are now using Chinese made cores.

Anybody else had any problems with the new Rhoads ?

Just Googled it. This must be a new problem. Didn't see anything about any problems with Rhoads lifters. If they are indeed that bad, the news will be online very soon.

[Ben M.]

I ran the 2801 in my iron headed 8.5:1 400 for years and while it was perfectly acceptable, it didn't exactly light the world on fire.

[goa484]

I got a set of vmax rhodes lifters this march and have had zero issues over 1500 mi so far on them. They seemed pretty quality too out of the box.