Browsing through CompCams BBC cams, I came across the only flat tappet hydraulic piece listed under the "Nostalgia Plus" section. It appears to have attractive duration and lift numbers for street use............

Part #11-670-4

"Exhaust note of LS-6 cam with hydraulic and increased performance"

276/283 Adv. Dur.
229/236 @ .050"
530/524" lift
112 LSA
1800 - 6200 rpm range

Anyone have any experience with this cam? Any thoughts on using it in a "mild" 496 with a 9.7 CR and TH400?

Charles

Good cam on a 1966 360hp/396. Good power everywhere. It had a good tone and rumble at idle. It didn't sound stock!

For a 496 I think it is too small. I think you need more duration and lift as the motor is so big. JMO for something that is all most 500 cubes.

Jim

Thanks, JLerum.

Are you suggesting that the 229/236 duration is too low just for a pure street, low compression 496?

I'm only talking about a very mild performance application with rpm operations in the 5200-5500 range and a smooth idle.

I considered the Lunati 280/288 hydraulic, but its' duration at .050" was short (223/?) and I was afraid that I would run into immediate detonation problems. Also looked at the Lunati 288/296 Hydraulic (231/239), but couldn't get a decent DCR number from Pat Kelly's DCR program (7.6).

There doesn't seem to be much of a selection of hydraulic cams out there that would suit my situation without going solid.

Thanks,Charles

I am interested in that cam also. Would it work in an 8.5-9.0:1 454 with 049 heads? I am looking for a cam with good low end power and a somewhat noticable lope in the idle.

Originally posted by 1967chevelless396:
I considered the Lunati 280/288 hydraulic, but its' duration at .050" was short (223/?) and I was afraid that I would run into immediate detonation problemsMy 454 has 10.59 to 1 (calculated) and I run the 280/288 with NO detonation problems.
..but I think its a tad bit small for a 496
I bet the 288/296 would work fine in a low compression 496 regardless of the low number.
Thats what gear and a mild converter are for smile.gif
Don't let the "low" number fool you

the 288/296 is somewhat similar to my 233/239 delta cam.....this cam in a 396 is alittle lazy under the 2200 rpm mark....but runs darn hard to 6500 rpms.......and works with 10.5 to 1 comp. on 87 octane.....might give ya some idea what it may do in 100 more ci engine.

should have a healthy idle that is noticeable and should pull hard to 5500 rpms....shouldnt be lazy at all under 2200 rpms....more i think the better it sounds....lol.

talk to summit about their 1303 cam. It's hydraulic. You might want to bump it up one notch but that's a good cam for a street engine on steroids.

Hi Michael-
I sent you an email using the address in your profile.
Brian B.

Originally posted by jobberone:
talk to summit about their 1303 cam. It's hydraulic. You might want to bump it up one notch but that's a good cam for a street engine on steroids. ..any strip experience with this cam?
Just curious on well it might perform

i ran the 1301 cam last year in my 396....it didnt do what i needed it to do.....gave up to early in the rpm range, it was giving up at about 5800 rpms, and it didnt have enough lift to take advantage of my porting.....pretty tame cam, the lobe seperation i think was 114. big blocks respond well to lift the more the better. saw i big gain going to the 233/239 i have now, top end pull was a very big improvement over the 1301.

Just wondering how the cam choice turned out? I'm just wondering what you picked and how it turned out???

Jim

Running similiard duration in my 460CI motor. 10.3/1 CR, running 233/236 @ .050 on 112LSA. Keep in mind, mine is a roller though. Idles at 850-900 with 11" vac at idle. Personally, I would use something like the Crane 296 Powermax Hyd Flat tappet in a 496 motor (something like 236/246, .around .550 lift on 112LSA. This would have just enough lump at idle and still pull plenty of vacuum. Just personal preference - I like Crane's flat tappet hydraulics. Not as aggressive off the seat as Comp's XE line or the VooDoo lines, but the lobes seem to always wear well.

We're running a 230 degree 480 lift cam in a 462" Pontiac. Nice sounding idle and stump pulling torque. The engine is very driveable with this cam and makes considerably more power than our L78. It is all to easy to get carried away with the cam and end up with a car having no traffic manners and gas mileage that will break the bank. If you want to be the fastest car on the street, then that is a different story.

Nothing fancy at ALL here, but I chose the good old CC 282S Magnum solid cam for my about 9.8 to 1 496.

I expect it to be one heck of a grunt motor!!

pdq67

Why go with all the old technology? use a newer design like the Comp XE or Lunati Voodoo series

B/c it flat works fine for me is why!!

Long life, no break in hassles, etc, etc...

And I'm not after that last hp either..

pdq67

In addition to the LS-6 hydraulic, CompCams also offers the solid version of this cam that looks pretty good. The specs are:

276/283 Adv. Dur. (same as the hydraulic LS-6 cam)
239/246 Dur. @ .050
.544/.539 Gross lift
112 LSA
.012/.012 Int./Exh. Valve Adj.

Any comments on this solid versus the hydraulic counterpart?

Charles

I put together a 454 LS-5 oval port 291's castings, Edelbrock performer intake, Holley 750, 3310 vac secondary, forged flat top piston engine together using the LS-6 Nostalgic Solid Comp Cam's grind. It sounds and runs Great, the car gets compliments all the time on the sound ! Engine has over 14 lbs of vacuum, idles around 850 r.p.m.'s (4 speed car), cylinder pressure was 180 lbs for all eight cylinders. Runs with no problem's on pump premium gas. It probably could run on 87 octane.

Ron Miller 92Camaro :beers:

..any strip experience with this cam?
Just curious on well it might perform

Was going over some of my old posts and saw I had not answered you. Sorry. Of course a dyno would be better than track times for lots of reasons although I get you.

No I never even finished it completely. I am about to slip it into a 56 trifive post car or my 76 4x4 Cheyenne which was the original build for the engine.

I don't think this is a specifically a drag cam and that's not my needs. I'd call it more a street/performan cam for a 454. Bigger engines need more cam than SBs and big engines handle more cam anyway.

However, with the advent of better and better roller cams that's one way to go and the best thing to do IMO is to call someone like Comp and give them your engine specs, your usage, tranny specs, gear ratio rear and overall, tire height and size, how strong drivetrain is and ask for help. You'll get some interesting answers and ideas.

If you just want a plain hydraulic cam here's some thoughts. My engine was a 30 over 454 with cast bottom, 702 worked heads with big valves, double springs, air gap and just a 750 single pumper for street use in a truck. That setup was good for 1hp/ci at least.

If you just want a hydraulic cam I'd stay around the summit 1303. You can always use bigger rockers for another step up. Bump the rev limiter to 6200, increase the carb size to at least 95% efficiency like a 850 even dbl pumper, add exhaust headers and 3" exhausts with limited restriction and of course good spark. That will get you 500+ hp around 525+ torpue, run on pump gas, sound good, and run accessories.

If you want more then I'd go roller rather than mech but I don't feel real strong about it. They are just better cams in general. Esp FI.

I'd talk to cam experts and there are some on here and you'll get help at all the big cams builders.

Good luck and let us know what happens.

jobberone,
my combo is all set (I run a mild Ultradyne that works well in my 454)but your comments are appreciated.
I was just curious how the cam performed.