Thursday, January 19, 2012

I have a chevy 350 4bolt engine with an edelbrock performer intake with edelbrock 600cfm carb.?

it is pretty strong but i don't have the muscle car lope it is pretty much a bit over stock but the heads they a castiron it is installed in a 83 silverado with duel 2 1/2 exhaust with flowmaster 40's what type cam would be best and would it be best to get liftes and pushrods as a whole set.I have a chevy 350 4bolt engine with an edelbrock performer intake with edelbrock 600cfm carb.?
theres a few ways you could go with this.



one is that edelbrock makes a cam/lifter set up matched to work with that intake and carb set up. summitracing.com has the matched set.



if it was for a customer who was just looking for that sound and maybe raced stop light to stop light once or twice a year, i would use one of two cam.

summit's cam and lifters set part #SUM-K1106

cam has .234degs duration@50

and .488degs of lift, cost $89.95

or crane cams again a cam and lifter set part # CRN-100182

cam has .230degs duration@50

and .465 of lift, cost $127.95

with both those you can use your springs and rockers, and that is on the heavy side giving you that sound your looking for.



and if it was for my self and i wasnt going to make this anything more then a all most daily driver.

i would go with this one.

part # CRN-100112

cam has .246degs duration@50

and .501 lift for an automatic trans or with out changing the torque converter

or with a manual trans

part # CCA-12-214-4

cam has .253degs duration@50

and .525 of lift

but with both of those youll need to replace push rods, valve springs, and you can use your rockers with the top one, but i wouldnt, i would go with roller rockers with both of those cams

and both of those will give you that sound your looking for and maybe just a little bit more, cause both of those are heavy sounding cams.



anything more bigger then that youll need to do other work, or it would be a waste of cash.
I own a shop, and will make it easy %26amp; simple for you without being too technical. The "best" cam %26amp; lifter sets depend on many things. If you will go to:

http://www.compcams.com

You can download this neat program that allows you to pick from a list of suggestions that are tailored to your vehicle. I have found this tool to be very useful, and can be a huge asset in selecting a set up that will do what you expect it to do.

As for your pushrods; Check your springs for bind in all areas, and use an adjustable pushrod to determine the correct length to use. Even the thickness of your head gaskets will change the pushrod length. What you "must" acheive is; fully closed the rocker arm should be sitting on the valve stem just inside the center of the stem, and when the valve is fully open it should sit just outside the center of the stem. In other words; the rocker (when correct) will use the area from 1/4 - 3/4 of the stem face. Anything else will cause the stem to mushroom, and total engine failure may very well be the end result.

Glad to help out, good Luck!!!I have a chevy 350 4bolt engine with an edelbrock performer intake with edelbrock 600cfm carb.?
Crowler stage 2 has that sound ya want and the low to mid range torque. Also , idle it down just a little. Gotta have THAT SOUND!!!!!! I even have it with my Harley with Andrews cam
Give Jegs or Summit Racing a call. Talk to there tech line.I have a chevy 350 4bolt engine with an edelbrock performer intake with edelbrock 600cfm carb.?
call crane cams with the specs, they will tell you which cam to go with.
That's the classic #1 mistake.. Street engines and guys wants them to sound like race engines.



End up with an over camm'ed gas sucking engine that don't have the torque to get out of it's own way..



To get that lope you need more duration.. Duration is time that valves are held open



The bigger duration moves the power band up.. Say like if you have good power now from idle to 4500 rpm.. Install a big cam and you'll have power from 3000 rpm to 5500 (heads then becomes the bottle neck)



Next cam size has to match your compression ratio.. Remember duration holds valves open longer..



That means the open valves lets your compression go out the exhaust.



So to build the cyl pressure you need to have good torque, you must have higher compression ratio..



I can't really recommend a cam size unless I know your compression..



But I will tell you this.. The ONLY way to get the sound you want and still have good low end torque is by installing a cam with a 105 to 108 degree LSA..



Now that tight LSA will kill off alot of your vac, idle rough, needs a higher idle rpm, and your power brales won't be near as good, but you'll get the sound you want.



If compression ratio is stock 7.8:1 to 8.5:1 then you don't want any larger than 214* @ .050" lift.



With stock type heads, you will make more power with a dual pattern cam.. 8-12* more exhaust duration than intake..



So something like 204/214* @.050", 106 LSA, and about .430"/.440" lift



Most stock heads are lift limited to .450" and others to .480" before you have clearance probs with retainers to seals, retainers to guides, valve spring pressure too weak, coil bind, etc



If you have more compression like 9.0 to 9.75:1 you can step up duration to 214/224 @.050"



If over 9.75:1 and under 10.0:1 you can go up to 216/228 @.050



If between 10.0 and 10.4 you can again step up duration to 218 or 220 intake, 230 or 232 exhaust @ .050"



Always use new lifters with a new cam..

No comments:

Post a Comment