camaro211z28

Ok so I got motor almost built and am trying to decide on a cam now. Its a daily driver so nothing hugely done to motor just a rebuild and standard bore pistion flat tops with 4VR stock bottom end and summit brand of vortec heads with screw in rocker studs and .510 lift max springs looking for a cam that has a good sound to it. Sound is a little more important to me then power as its a daily driver. I like the sound of the cc306 and the gm 847 I know those wont work with the springs I got but anybody got an idea of a cam that will work and sound good. Not looking for a race track cam sound and not looking for a lt4 hotcam sound. Something that will get your attention when im out driving thats the kinda sound im looking for any idea of a certain cam out there or just some custom grind numbers?

camaro211z28

Sorry 350 roller block. Looking for a roller cam and will run 1.6 rr. And have a 650 cfm carb

InfernalVortex

iTrader: (4)

I dont know much about the summit vortecs, but just an old LT4 hotcam will get you to 350hp. An XR276 is a nice choice too. Depending on how good or bad the summit vortecs are, you may hit up to 400hp with one.

What is your compression ratio? Gearing? Stall?

Sound being more important than power isnt really helpful. The "better" it sounds the harder it will be to keep it everyday drivable. The sound nad power go together, and the milder cams and everyday drivability go together. But if you have the right gears, stall, etc, and get the right roller cam you can make a good bit of power.

How come you didnt bore it out? Did they check to see if the bores were all still in spec?

blackgloves

Comp Cams XE 230-244 part number 08-360-8

camaro211z28

Doing a budget sorta build. Didnt want to bore it as I dont need to raise my compression. Its 10:1 the internals are out of a 90 l98 corvette. I had the lt4 hotcam before when I built my 95 z28 lt4. Made good power but It could of had a choppier idle. Maybe it woulda been better with 110lsa

camaro211z28

Black gloves is that part number correct cuz nothing comes up

InfernalVortex

iTrader: (4)

Boring is a repair to ensure proper long term ring seal. The average 30 thousandths bore repair will only increase compression around .1 to .2 depending on the stroke. If you just throw it back together with a hone and new rings it will last a while, but not nearly as long as it would otherwise. I've heard 50-75k miles thrown around as average, but it's not something that's done often anymore. That was based on some books by David Vizard that I read a while back.

And you could easily go bigger than an LT4 hotcam, but you're going to need th exhaust and gearing and stall to make that work out for you. I hate to say it but maybe one of those thumpr cams would work. Im not completely sold on them as a good street cam, which is allegedly their entire purpose. But it might suit your application. Really long duration, really weird lobe separation angles and really big mismatches between intake and exhaust duration. They wont be the most street friendly cam around, and you'll probably sacrifice a little power, but it will get you the idle you're after.

The LT4 hotcam and xr276 are about the sweet spot for factory vortec heads. They make 340-380 hp. Above those lift ranges the vortec heads dont really get much more flow as the port will stall. So from there only more duration helps, and the port volume just isnt big enough to support really large cam duration. You get less and less low end for only a little more high end power once you go past the xr276 which is, if I recall correctly, a 224/230 cam. A 230/236 cam, probably the xr282 or something like that, would be fun. But beyond that Im not sure there's much power to be had. The real question mark is whether these summit vortecs are the same as factory vortecs or if they're cleaned up a bit.

camaro211z28

Summit vortecs are identical to factory gm vortecs. Summit also sells gm vortec for the same price as summit brand vortec. But for the same price the summit brand ones are the way to go. Threaded rocker studs and springs rated for a .510 lift. Vs the gm vortecs that summit sells thats just a regular .480 spring and has pressed in rocker studs. I hace 3.73 gears and a t56. No stall