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Going to bbc454 what cam

8

82Scottsdale

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Well im finally upgrading from my little 350 to a 454 red block. Im getting it as a bundle with a th400 and a 205, right now i have a built th350 and a 205 that needs a rebuild. the 454 ran and im getting it for cheap. im trying to decide what cam to get for it and what carb (right now holly truck advenger 670). I was looking at this cam.

http://www.summitracing.com/parts/CCA-CL11-239-3/

seems like it has a little lope to it and still a can be a stump puller. i need milage and power and would like a little lope without needing a stall. Sh
ould i go with a little bigger cam? flat tappet?

Im also finally upgrading to a dana60 and linking the front, (tired of ride of springs and bushing)

Trucks a 82 chevy shortbed k10, 14b ff locked 4.56 gears, 37 toyos for street, 39in boggers for offroading. i use it to daily drive and offroading, i mud bog, rock climb, trails, dunes...it all. i like torgue.
 
A 454 will get you moving no problem, so real low rpm torque wasn't a big concern for me, I chose to run the rpm range up a bit higher with a redline of 5500. I chose a bigger cam that has 500tq @ 2000, and still 500 @ 4500....
If your running big dunes or thick mud, you may want the rpm???
 
what casting numer are your heads. that cam would be a complete waste with small port heads. it would need some big oval port heads
i bet it would like more compression too. most stock bbc's are 8.2-8.4:1. and i bet that it would put out alot better low speed torque and driveability around 9.0:1. but it wouldnt be necesary. also according to comp,that cam needs a little looser convertor than stock. which would suck in a truck.

781's, 049's or 236 heads combine with that cam would make some serious power. but i think even with some big oval heads, the next cam size down would be a better choice for a heavy truck with big tires,

i have over-cammed 2 of my vehicles. i have under-cammed atleast 1 of my vehicles. i would rather drive an under-cammed engine than an over.
 
Agreed, it will take some good large ovals, some port and bowl work, some big valves, and a little more compression for that cam.

Based on the fact that I run dunes and mud and like rpm, here is the cam I chose:

http://www.summitracing.com/parts/CCA-11-676-4/

Here are my engine specs:

454+.030 9.4? c.r.
recon'd rods w/ ARP's
Cast crank turned .020/.020
Balanced assy.



Cylinder head breakdown of work and head/cam/intake manifold components purchased.
$106 Edlebrock Performer intake
$100 781 Castings
$285 Comp Cams Ultra Magnum Roller Rocker Arms
$120 Comp Cams Xtreme XS268S-10 solid flat tappet cam
$125 Engine Pro oriface drilled solid lifters
$80 Comp Cams Magnum .080 wall pushrods
$110 Stainless 2.19/1.88 valves

$165 K-Motion #800 Valve Springs, Comp Cams moly retainers, machine steel locks, and exhaust valve rotator eliminators.

Head castings were cleaned, blasted, surfaced, ported, guides replaced, machined for bigger valves, and assembled.

Intake port matched to heads. this took considerable amount of material out of the intake, as it was cast to match the peanut port heads. He blended the ports into the manifold about 2".

Cam Specs:
.553/.568 gross lift.....016 lash
230/236 duration @ .050
110 lobe separation.

Valve spring specs:
#K-800---1.460 diameter double Special Silicon spring that is good for camshafts with up to .700 valve lift.
165# @ 1.850 - 471# @ 1.200 - coil bind @ 1.085

Dyno 2000 says:
I get a peak of 470 hp, and torque peak of 550 @ 3500. The torque is 525 @ 2000rpm, and still is above 530 @ 4500 rpm.
 
you may need new valve springs with that cam, and it recommends a 2000+ stall converter.

I would go with the 11-235-3 if you don't want to change those components. Keep in mind this cam may require new springs as well, but if you take some measurements and are free of coil bind or stem seal binding I wouldn't be afraid to run this cam. The other cam has enough lift I would want new valve springs either way.
 
Ill most likey go with the 11-235-3 comp then, but should I run solid or hydraulic lifters, I know solids are a pita to keep tight, and this is my daily so I was thinking hydraulics. I have a holly truck avenger 670cfm carb right now, is that too small for a 454? What will make my mpgs better?
 
82Scottsdale said:
Ill most likey go with the 11-235-3 comp then, but should I run solid or hydraulic lifters, I know solids are a pita to keep tight, and this is my daily so I was thinking hydraulics. I have a holly truck avenger 670cfm carb right now, is that too small for a 454? What will make my mpgs better?
Click to expand...

Definitely hydraulic. You don't want to run a mechanical lifter on a hydraulic cam because the ramps are different and the lobe is ground for running mechanical lash or not. It can be done with abnormal lash settings but isn't really worth it. And with the recent cam profiles for hydraulics I don't think it's worth running a solid cam unless it is a pure performance vehicle, definitely not a daily driver. More maintenance, and shorter valvetrain life are not something you want on a daily driver.

As for the carb, up until around 5k that carb will be fine, above that, it's a little small. If you have it and it works fine, run it. But a 750 vacuum secondary 3310 or street avenger would work better for a daily driver, and give you better performance as well, as much so because it's not a TA, and the size.
 
My two pennies. I run a 204/214 495/510 lift speed pro. I love it. It is done at 3950 but the hp doesn't fall off and it is flat for another 1000 rpms so if I need to spin it, it will still pull. It will pull from 500rpm on up. I don't think if I could recam I would.
 
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