what kinda times or hp could this combo give?
- 350 4 bolt main bored .30 to a 383
- msd ignition (distributor, wires, those plus 4 spark plugs)
- powermax retrofit hydrualic roller camshaft
with stuff from crane cams such as lifters, pushrods, vavle springs,
retainers, valve steam seals, valve steam locks, energizer rocker arms
- stewart hi volume water pump with a 3 row radiator and a 17" flex fan
- underdrive pulley
- wieand street avenger intake manifold
- holley 870 cfm 4 barrol carburator with k&n air filter
- sportman II 72 cc cylinder heads bare (should give me around 10.4 compression)
- hooker headers with a GM 3 inch performance catback system
- timing chain (with those longer spokes)

anyone know what kinda power this combo can give me?? cuz believe it or not that's what I"m about to get. I already have the 383 ready to be build, I just want to know if this would be a good combo.
thanks

 

Doesnt sound to bad... but none of use can give you much of a power estimate unless we know some cam specs.

Also, one other thing, boreing a motor over by .040 is only gonna bring it up to about 356, to make a 383, it involves different rods, pistons and crank to change the stroke to a longer one, thus making the cubes go up

One more thing, that 870 carb is way overkill for that motor, a 650-700 is more like it.

Steve

 

you must be running a big dome to get 10.4 out of the larger chamber heads, i'd go smaller and try to run dished pistons or flat tops. i'd run a m55 oil pump and not use high volumn or high preasure pumps and stick a 26 spring in it from mr gasket.

 

the cams degree separation lobe is 112 and it's lift is .488/.509 (intake/exhaust) I"m thinking of getting that one or maybe a little bigger, do you think this one is fine? or should I go bigger?

 

Id say youd have roughly about 460hp at about 6500 with everything tuned right

 

hmmm... my goal is 500, just 40 more........ I"ll think of something thanks everyone

 

If you're lookin for that much HP I'd forget the Hooker cat-back, get something with 3.5" intermediate, maybe 4'', or duals.

 

just top it off with NOS. 150 shot shuld be good

 

not a chance that cam is gonna make that much power....

you'd need something along the lines of a .560 lift, 220-230 dration and a good set of heads to even come close to 500. And in that case, a mufflex is gonna be a must.

Steve

 

yea with a set up making 500 hp... i wouldnt bother with a full exhuast... id run 2 1/2 or 3 inch dumps.... like i have... sounds better, works better, costs less, and doesnt p-i-s-s you off as much during installation.

 

what's the duration of the cam? i really doubt it's enough for 460hp, even with 10.4cr. Also, as stated earlier you'll need some really domed pistons for 10.4 with 72cc chambers.

if you plan on running iron heads and pump gas then 10.4 is really pushing it anyway, they say 9.5 is the highest you can run on pump gas with iron heads.

 

ok guys let me give you the update, sinse the time I posted this months ago I have gotten a comp roller cam 276xr (I think thats it's name) with .50/51 lift some heads with 64cc's giving me 10.8 compression, with 2.02/1.60 190cc runners, I"m am currently getting the entire valve train componets, (lifters, pushrods, roller rockers) I've got a 50000 volt ignition system (hei, mallory hyfire box,etc.)

thanks for your help I really do appreciate it.

 

I'm running 10:1 on premium with ported L69 heads.

I would definately use a larger cam with a motor like that. A .30 over 350 is a 355.

 

Oops, I didn't even read the last post The cam sounds better but that is a hell of a lot of compression you are running. What kind of heads are they?