Right now i have a stock 454 that I just dropped in my 71 coupe. I put the 4" hooker side pipes on and will be putting a single plane intake on too. I want mo power! Was thinking some sort of 280ish duration. I like comp cams usually. Wish I still had desktopdyno. Anyway, I have 3.70 gears, and an automatic with near stock stall speed. I will raise the stall later. I just want a nice solid lifter cam that will get me by for a year or so till I upgrade to bigger better heads and an even bigger cam.

Please give me some suggestions. Thanx.

 

I've got the comp xs274 solid. It's got a small amount of lope and pulls hard. With your stock stall....hmmmm....how about an xs262s or xs268s, maybe even a magnum 270s.

 

xs 274 sounds pretty close to what I want. How high a stall would I need if I went with like a 282 to 288 cam.

 

I had a Magnum 282S in an oval port 454 that ran great. I would think you'll need more stall speed than stock though. 2800 should do it.

 

Hey long time, No See! Are you still with a band? I never did get that Cd from you. Anyway without going overboard this is a really nice cam for BBC's

Part Number: 133841 Grind Number: F-304-2 (REPLACES CC-304-2)
Engine Identification:
Start Yr. End Yr. Make Cyl Description
1967 Up CHEVROLET 8 FAIR IDLE, MODERATE PERFORMANCE USAGE, GOOD LOW AND MID-RANGE HP, BRACKET RACING, AUTO TRANS W/2000+ CONVERTER, 3400-3800 CRUISE RPM, 10.5 TO 11.5 COMPRESSION RATIO ADVISED. BASIC RPM 3000-6500
Engine Size Configuration
396-454 C.I. V

Valve Setting: Intake .022 Exhaust .022 HOT

Lift: Intake @Cam 3200 @Valve 544 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 3334 @Valve 567
Rocker Arm Ratio 1.70

Cam Timing: TAPPET @.0135
Lift: Opens Closes ADV Duration
Intake 38 BTDC 86 ABDC 304 °
Exhaust 91 BBDC 43 ATDC 314 °

Spring Requirements: Triple Dual Outer Inner
Part Number 99895
Loads Closed 144 LBS @ 1.900 or 1 29/32
Open 366 LBS @ 1.380
Recommended RPM range with matching components
Minimum RPM 2800
Maximum RPM 6600
Valve Float 7200

Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake 10 BTDC 48 ABDC 109 238 °
Exhaust 63 BBDC 5 ATDC 119 248 °

 

A single plane intake would not be a good match for that motor. The Edelbrock RPM AirGap or plane ole RPM would be much better. How much power do you want to eventually make?? What will the new heads be?

 

I've got the xs274 and I don't think it would like a stock stall.

Minimum 2000-2400 for the 280+.

 

Thanks for the responses!

I want to eventually make 800+hp give or take a few ponies, which is why I was thinking of something like a team g single plane intake. It's ok if I lose a little now to gain it later. That and every motor I've ever ran was a dual plane. I guess i just like the looks.

I will purchase a 2800-3000 stall when I order the cam I've decided.

The last thing I'm gonna upgrade will be the heads. And then... Dart? Brodix? AFR? Stock ported? Oh well thats another thread. Just not 100% sure yet. Definately gonna need some more air flow.

GKULL! Long time man! Glad u remember me. I haven't played in the band for a year or so now. But I still play my guitars a lot. I HAVE to send u a cd or dvd. I'll message u later. Where can I order that cam from? And what brand is it?

 

That is a Crane Cam. I would order the cam/solid lifter/springs kit. I would call Jeg's and Summit Racing and price out the kit delivered.

 

800 NA? or with nitrous, 800 with a 454 ?

 

I say 800(NA), but I'm not stuck on any particular number. I would prolly be just as happy with 650-700 hp. I've got the power fever. Had it for years. Gotta have more than last time u know.

 

I ran a couple of DD2000 simulations with that 238/248 cam. Stock heads with 9.0 compression and it's low to mid 400 hp. longer duration cams were not of much help unless you bump up the compression. Stock low compression 454 were not power houses.

 

I wonder if 10.5:1 would be worth much more than 2% more power?

 

I just used the BBC flow files from stock iron heads and guessed at 9.0. Going from 9.0 - 10.5 is a very big jump probably closer to 6% on both

 

Gkull, did u get that desktop dyno off fleabay? If not it's cool just wondering cuz im thinking about orderin it.

Could u run some numbers on DD2k for me?

I've got the stock oval port heads on my 454. CR is prolly 8-9:1 I've got the Hooker 4" sidepipes. can't remeber the primary sizes but I know it was the bigger of the 2 choices. maybe 2-1/8"? I want to find out which Cam/Stall combo would make the most fun. I want a single plane is the only thing. I don't care if I DO get more usable torque down low with a dual plane. I want to get like a Team G single plane. Kinda in the spirit of the sidepipes. That and I ordered the L88 hood and I want to see how everything lines up with the intake I'm sticking with.

Later on I'm gonna get some badazz heads, a bigger cam and a forged rotating assembly. Then the intake and exhaust will be a more suitable match.

I need a good intermediate CAM/STALL for now is all. I have to draw the line somewhere before I go broke.

Rusty

 

I like this cam, just not sure. It seems big! my 383 had a 282/286 (230/236@050)with AFR heads

 

Whats wrong with GM high performance! They have it all.

 

I'm surprised you liked that cam. I used it once in an oval port 427 and was much less than favorably impressed. That dude has a lot of advertised duration for such mild .050 numbers..as well as not a lot of lift. It has a wide LSA which will help manners somewhat.

I think with the real low compression, I would try to change stuff somewhat. I would tighten LSA to get some cylinder pressure and then use a much faster lobe to cut the effective overlap down.

Harold Brookshire (old Ultradyne) has a new flat tappet specifically targeted at the old Comp 288* street roller. If it runs as well as the Comp, but is still a flat tappet....it would be slick. Compared to the one above you would have much better .050 duration numbers even though it has a lot less overall duration. Plus more lift..and I KNOW the .200* duration numbers would be tremendously stronger.

Since you are going to a little more converter you'll be fine. The old Comp street roller..which was actually pretty mild..would lug to 1000 rpm in high gear with a 4 speed and 3.36 gears and never surge. An auto would never notice it.


Here's a note from him:

I've finally designed something, now I just have to make it......
A solid flat tappet replacement for the Comp Cams CB-288a-R10 their 11-692-8------
CB-288A-R10 288@.015 246@.050 158@.200 .622" valve lift 38-70-78-30
UDHarold's 285@.015 249@.050 161@.200 .618" valve lift 35-70-74-31

Their cam sells on their web site for $363.67, and the -8 in the part number means it IS NOT a steel billet. Lifters cost a good amount, too.
My cam will be a standard high-quality proferal cam--what solids have been made of for 30 years--and will cost around $168.75. Good Americian-made mechanical lifters are available at less than 25% the cost of solid roller lifters.
My cam stays .0176" away from the edge of the lifter, and I have had other cams that get closer to the edge go 100,000 miles on the street. The seating velocity is the same I have used on those 100,000 mile cams. Valve lash on mine is .018", on the Comp .020".
Because of changes in oil quality over the past 10 years, I would recommend using a lot of caution in breaking in ANY flat tappet solid or hydraulic cam.
The Comp Cams is symmetrical, mine, as always, is unsymmetrical. Look at the timing differences at .015"---My cam has a 4* longer power stroke, meaning more torque into your crank at ALL rpms, and a 3* later intake opening point, for less reversion and higher port velocities, again at ALL rpms.
At .050" and at .200", my cam is 3* fatter---Not only is it filling the cylinder faster, it has MORE time to do it.
The result---MORE POWER everywhere.
Now to get you guys some made......

Harold"




Just a thought.....


JIM

 

Are u talking about the voodoo lunati cams? i am interested. Tell me more.