cam advice please

[meathead95]

would this be any good for a street engine. occasional drive and weekend car shows. its for my 72 2wd blazer 454 i was just wondering it seems like a lot of lift to me and the engine just has stock oval port heads. plus i have never had a solid lift cam before. ill get roller lifters and rockers also. i just want it to have a real good lope to it and smoke the **** out of the 20's

Camshaft, Solid Roller Tappet, Advertised Duration 295/305, Lift .670/.670

[cableguy0]

you cannot run that cam on stock heads you would be best to go with something smaller and not a roller. the roller cam requires much heavier springs will require screw in studs and guideplates. those stock heads wouldnt begin to flow enough to bother with that cam. your gonna have to steer away from the roller cams to use your stock heads

[browndawg71]

there is alot of information missing to try to answer this question absolutly right, but it does sound to big. the duration @0.50 would be a good start.it is my opinion that for the amount of $$$ it cost to run a roller cam, a solid will suffice and is a hell of alot cheaper.but if you want to set it on kill , go with the roller.the oval ports need to be the 781s or the 049s these are good streetheads. there is a lot of factors in making a good combo.

[meathead95]

i have the 781's

[meathead95]

anyone have any advice for a cam for this beast. not sure what the bottom end is i took it in on a trade it is very clean inside like its a new rebuild so im not tearin it apart it was supposed to of had a flat lobe on the cam but it actually has a pushrod that barely pushed through the rocker arm. any way it has the good oval port 781 heads on it and an air gap intake with a performer 800cfm carb and ceramic coated headers. it will also have a 700r4 behind it i am wanting a nice lopey tire burnin bbc. all reccomendations are welcome
thanks
keith

[Tx Firefighter]

Meathead, call your favorite cam company. They will be able to steer you right on selection. Answer their questions honestly for best results.

Cableguy, you have small blocks on the brain. He already has screw in studs and guideplates stock.

[meathead95]

yeah, i figured on calling a cam company i mainly started this because i found this cam above with roller lifters, guide plates and roller rockers for 200$ which is a smokin deal it just sounded like it had too much lift to me. i have never had a bb before so i wasnt sure how much lift those heads would take before i started floating the valves
later
keith

[stepside454]

you can use a roller cam with stock big block heads, hell, they already have screw in studs & guid plates. That one there is a bit rowdy for the street though

[ftsmoot]

you can always have that big a!! cam reground to a liveable spec since you got such a good deal on it

[cableguy0]

yea firefighter your right had a brain fart for a moment when i typed my original message lol. thats still quite a bit lumpy even for a big block though being a roller it will have a bit more manners than and equal sized cam that was flat tappet

[67shortie]

Originally Posted by ftsmoot

you can always have that big a!! cam reground to a liveable spec since you got such a good deal on it

Excellent idea

But for his street engine, a solid roller is a bit over the top even tamed down. A HYD roller would be better for his application. BUT since he can get the remaing parts at a low cost it may be worth it. Keep in mind though solid rollers are not all the same, standard roller lifters were not made for low rpm use and will wear quickly because of lack of oil on the bearing that rpm from the engine provides from crank throw. Iski makes a 'red line' lifter with an extra hole spesifically for this problem, this lifter will live on the street. I would imagine if these are older style lifters and have seen alot of street use they may be worn already. Inspect them closely.

[meathead95]

thanks for the advice fellas i didnt know about the low rpm lifter thing

[browndawg71]

a stock cam in this motor should smoke em, but more is better. i would go with around 230 degrees@ .050 duration on a hydraulic and more if you run a solid.if the compression a little lower i would go loweron the cam. the heads you have are good heads they can be also improved a little by pocket porting and bigger valves if it has not been done already.