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Old 09-02-2003, 01:01 AM
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too rough idle??

i think i may have purchased a little too radical cam, and im curious if im going to get the ultimate bad idle...this is the engine parts : .....71' olds 455 block, crank...edlebrock performer heads, manifold, and 750cfm carb...(bout) 9.5:1 with 77cc............now the cam specs are 496/520 lift 290/300 adv. duration 224/234 duration @.050" 112 centerline

will my idle be really bad, i mean i had a friend say that it could as bad as having to shift into neutral and rev at red lights/traffic........i dont mind 'rough' but what my friend said scared me

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Old 09-02-2003, 03:40 AM
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no, I don`t think there`s much worry about it being too big, that`s a tame cam for a 400 small block chevy, and your 55 inches bigger, even so these are 2 different engines, cubic inches like bigger cams. If your running a automatic transmission you will need a stall converter about a 2400 should suit you fine, and the car will have a nice lumpy idle, but it won`t be too bad.
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Old 09-02-2003, 06:18 PM
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I agree thats pretty tame,im running 250@.050 roller in my 406 chevy and its super smooth with 15inch vacuum.
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Old 09-03-2003, 02:18 AM
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I lay strips in neutral.
 
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alright, cool........thanks
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Old 11-05-2003, 03:00 AM
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which pistons are u using? 8.5 smogger stock pistons? was this engine originally low compression? i have a 68 455 that i am building in a similair manner edelbrock heads torker manifold factory forged steel crank but i should get liek 10.25 to 1 compression with the cam i selected i sholud have 485 horsepower which will push the 55 chevy belair im puttin it in along really well lol ur cam shouldnt be a problem as long as u use a 2200-2500 stall converter
later
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Old 11-05-2003, 04:50 AM
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