[Desertskye68]

So i was doing some thinking and thought about this combo. Can anyone tell me if this combo sounds good or would i potentially run into probs.
A little facts. .

The heads are '215 and are rebuilt. Three angle valve jobs, stocks size valves with unleaded seats, and mild port work to chambers and runners.

The block is .040 over and ready to go. Stock everything with some brand .040 pistons.

Block: Reuse Original
Crank: Reuse Original
Rods: Reuse Original
Pistons: Reuse Original
Cam: Comp Cams 270, Lift .510, Duration 270, 249-11-207-3, LSA 110,
Lifters: Comp Cams 812-16, 249-812-16,
Cam Kit: Comp Cams 249-CL11-207-3,
Complete Cam Kit: Comp Cams K11-207-3, 249-K11-207-3,
Pushrods: Comp Cams 7154-16, 249-7154-16,
Guideplates: Comp Cams 4806-8, 249-4806-8
Rocker Arms: Reuse Original
Valve Springs: Comp Cams 924-16, 249-924-16,
Valve Retainers: Comp Cams 741-16, 249-741-16,
Valve Spring Locks Comp Cams 612-16, 249-612-16
Valve Stem Seals: Comp Cams 505-16, 249-505-16,
Timing Chain: Comp Cams 2110, 249-2110,

 

[Big Dave]

If I were spending that kind of money; I would buy a roller camed 454 short block out of a TBI equipped pick-up truck from the bone yard, and slap on your 3917215 closed chambered oval port heads with the 101 cc chambers on top. I would then buy a 210 'ish @ 0.050" lift duration (230 degree maximum) hydraulic roller and install the Beehive version of the required springs. Leave the QuadraJet on top but upgrade the manifold to a newer aluminum one and reuse your old short water pump (or buy a new Stewart aluminum one). Top it all off with a brand new 396 325 horse decal.

Big Dave

 

[Desertskye68]

hmmm

Sounds interesting what kind of power do the TBI's make when i do what you have mentioned. I thought those trucks were enemic.

 

[1968 Caprice 396]

You're gonna add all that valve train stuff and re-use the old rocker arms? :noway:

 

[Desertskye68]

nope

Nah i'm going for roller rockers. i just didnt add everything to the list. Like you say all that stuff and stock rockers? crazy!

 

[Big Dave]

The short block has no effect on the horse power of the motor other than the contribution made by it's displacement and the compression ratio. A stone stock 454 is about 7.5:1 but that same short block with your closed chamber heads it will be closer to 9.5:1. Your heads are bigger deeper breathers than the newer "Peanut Port" heads, that run on PU trucks (the reason they are anemic is the choice of heads and cam) and a milder cam will give you more tire shredding bottom end torque to impress your friends more so than any noise a cam makes.

Fun comes from optimizing the motor and car to meet your desired plans. If all you want is a noisy cam get a Thumper series cam. It has ridiculously long duration but on the exhaust side so that all it does is make noise. A quieter cam 200-210 degree duration on a 112-114 degree LSA will allow you to make gobs of power on the street. So much so that traction can be an issue, allowing you to light your tires with the punch of the throttle.

Race cars live on trailers, they are not street driven. There is a reason for this. Long duration cams that you love to listen too make no power below 4000 RPM. That means every time you want to leave a light or stop sign you have to do the same thing the race car does rev it up and side step the clutch (or flash your 5,600 RPM stall converter), and away you go. This style of driving will probably get you a ticket in most towns across America. That is why race cars are on trailers and that is were a long duration, short LSA cam belongs.

Big Dave

 

[Desertskye68]

i see now

Good info Big Dave. I will give the 454 some thought. Now to find one in Phoenix. thanks again bud.