I have read (in other forums) that the .509 is bigger than the Lunati 60342 solid in 'real' duration.

That doesn't seem right?

I know the hydraulic does't see lash but 8-10 degrees more for the solid to match seems extreme.

Could someone please 'splain,,,,,,,,,,,,,,,,,,,,,,, please?

MP .509 is around 250*@050 timing, measured real-world if memory serves. A solid cam costs you about 1/2* per thousanth valve lash, so that brings the lunati 60342 down from 251/259 to 243/241. Add to the mix the 509 is available in either a 108 or 114 LSA with the lunati being a 110.

In terms of duration, the 509 is bigger. In terms of lift and lobe rate, the lunati wins.

Thank You.


That Voodoo would no doubt be more friendly with a 3.23 rear gear eh?

I know fo' sure I am going solid flat tappet, but it is going to be more toy than transportation or drag. I am looking for something 'close' to the old .557 since there are "Much Better Cams Out There".

I rekon that my build will be running 3.23s most of the time, but I do have a chuck with 4.56s as well.

11:1 446 3800# B body 3000ish stall 906s in the 270 range e85 and 29 inch tire.Also 1.6:1 Crane Iron rockers.

Is there a 'proven' cam better in the .557 range?

3.23 gears

Talk about a mismatch.

You're building a high rpm engine and dog it out with those gears.

Years ago I built a .060 over 413 with the street hemi grind cam, much milder than either of your choices, same heads but not as much compression. It ran ok with 3.23's and a stick but it kicked butt when I put 4.10's in.

You need more gear and better heads if you really want to run a .557 cam.

YUP!

Lunati actually advised the 60341, but,,,,,,,,,,,,,,,,,,,, politically incorrect is the way I seem to fly?

Used to have the old D.C. 'Hemi grind (472/280?) it was a bit too mild for my tastes. I have a spare 4.56 center section. Never been fond of running them low gears, sure it rips but running down the road they ain't much fun.

Thanks for the reality check, I know what I need,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, but I know what I want?

Damned Tim Allen syndrome.

I ran those 4.10's all over the place, including a trip from Memphis to San Diego.

Not sure why people bag on steeper gears on the highway, put in an OD if it's a big problem and have the best of both worlds I guess.

A 3.23 and a 29 inch tire with a 3000rpm converter!? You shouldn't even be looking at these cams. The biggest cam you should be looking at is the mp.528 solid.

I really like the 528 but the smaller Voodoo SFT (60341?) seems to be right in between the ,528 and .557?

Me thinks the .509 is more raunchy than the .557?

I could stay closer to 27" on the tire, but like said. It's going to be just a toy.

If I lose .5 it will still stomp most of the crap I'll ever encounter?

I've got a .557 i'm pulling out, if you want a deal on a cam. cam and lifters are in perfect shape. also I don't know if there are much better cams out there than these two mopar ones unless your going hydraulic roller.

Yes but unless you're going to a 4.10 rear gear it doesn't really matter in your case. I don't think you'll like anything more aggressive than the .528 with your rear gear. A 2" tire diameter change won't fix that.

What exactly are you putting this cam in?

The 108 LSA 509 is 248 @ .050" with 76 deg overlap. Everybody seems to be losing their minds over the converter and gear and if you are building a 383, rightfully so but if you are building a 493+ stroker, not so much.

I have that cam in my 9:1 493. I was really concerned I'd messed up when we fired it on the dyno and the idle was still loping hard at 1100 and maybe 8" of vacuum. I thought well it'll make some power but it's going to be a stone under 3000. Wrong! It made good torque right off idle and made no less than 500 ft/lbs from 2000-5000, peaking 600 ft/lbs @ 4000 rpm.
When I asked my builder why it still idled so rough given it had 53" more displacement to absorb the extra duration, he said 76 deg of overlap is 76 deg of overlap. It would idle like that if it had 800 cubes.

I ran it with the stock converter and 2.76 gears until the trans gave up and then I put in a T/A 2800 converter. The engine could pull the 2.76 gear OK at cruise speed but it wasn't "happy" much under 2500. 3.23's solved that.

Even with the 2.76 it ran 13.92 @ 101 mph with a spinning 2.23 60 ft in a 4800 lb New Yorker.

If I was doing it over I'd go with the 114 LSA 509 if it was still available just to make it more power brake friendly or ideally a custom .600"ish lift hydraulic with similar duration and LSA (if that is possible) to take more advantage of the E-heads.

Kevin

He's building a 446, which I assume to be a bored 440, nonetheless a larger displacement engine, especially with a longer stroke will be more forgiving of larger cams.

Point is my 60 over 413 was 20 inches smaller, same stroke, than his 446. Your 493 was 47 inches larger and what's the stroke difference?

Personally, I think his bottom end will be soggy.

Is there a cam out there (solid) that would work with the tall gear and be as snotty as the .528 but with a little more attitude?

I have read time and again how well the .528 runs, but it is too civil for me tastes?

I ran the old DC Hemi grind with lesser heads and a bit less compression .050 down and 2295s with a steel shim. It had a decent lope but was strong down low. That was with stock stamped rockers (less than 1.5)

I will no doubt be the first mopehead that has chosen too large of cam eh?

Yes I do have a complete center w/4.56s but I really hate to rev the snot out of the old girl if I choose to take a small road trip.

That Lunati (60342)is on my radar.

Is this a U.D. Harold design?

'69 Coronet R/T Factory Y2 yella, Rancharger, been sitting (inside)since the fall of '84.



Surprisingly nice car, I be the third owner 79,000 mile ORIGINAL never been titled more than 25 miles from the dealer it was purchased at new!

That holds true today.

Yup I've been haulin' the old gal with me 32+ years and three wives later,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,'
I still have it!

I ran the 509 in my current 440 , it likes stall and gear plus compression. I started with a 4200 and 3.9 gears , ended with 5000 and 4.1 .
I also tried that Lunati when I went sft , it was good but not noticeably better on the chassis dyno , though I never ran it at the track . Had a fabulous loud sound , even louder than the 509 . I also fitted the Lunati in a 510 stroker and another 440 both ran great with rump .
The Lunati was great on the street .
Surprisingly I also had the 509 in a 8:1 440 , but it also had the 4200 plus 3.9 gears though I also had 3.54 gears at 1 stage .
I always run a 29" road tyre , 28" on the strip .
The 509 also did a couple of interstate runs , 12hrs each way , no worries .
With the tight lobe 509 there is no engine vacuum for brakes especially with a single plane intake .

Tex

One of my friends said it best about the 509 cam, "baddest cam at the drive in".

If you want something that really sounds tough, and is low effort and easy on parts, that's it.

But......... Anyone priced one of the 108lsa versions lately?(P4120237AE)
Last I saw, the price reflected what I can only assume is FCA thinking, "we don't want to sell these anymore".

If I were to recommend an off the shelf grind that fits the same application criteria as the .528 cam, but would have a little rougher idle, I'd say the Hughes 4246.

For a real "street" cruiser though, I'd use something with less lift and smoother(slower) ramps that could be controlled with less spring.
Something more like the 528, but on a tighter lsa to put a little more "pop" in the exhaust at idle.
I haven't seen anything like that in a catalog, so it would likely have to be a custom.

You game?

I will send you a PM and see what you may come up with.


I don't know if them Voodoos are Harolds design, but I always enjoyed reading his take on the 'physics' behind camshaft design.

I'm just an old clod, just want a good running car to 'take out for an Ice Cream' if you know what I mean?

Perhaps it is better to have a cam not so obnoxious, but runs like a scalded cat?

If you left it up to me, you wouldn't get anything too wild for that build.

It would be milder than the 509 cam for sure.

Would you rather sound fast....or be fast? Lopey idle and nasty smelling exhaust gets old real quick now that I am "older".Build for torque.Dwayne can spec you a cam that will make cruising pleasant and still have a little bark.

There was a 284/528 cam with a 106 lobe center, it was one of their circle track cams...picked one up several years ago.