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Author
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Topic: about edelbrock cams
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thumpin cat
Journeyman Posts: 12
From:
Registered: Mar 2002
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posted 03-25-2002 02:36 AM
  
a friend of mine has a 350 with an edelbrock torker II series cam with 292/300 advertised duration, the thing is his idle is not as rough as i thought it would be with that duration i thought the bigger the duration the more rough your idle will be, i dont know if im right, 292/300 advertised duration should be enough to give a rough idle, does lift play a role in idle roughness please help me out thanks a lot
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steve'66
Gearhead Posts: 3698
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 04-02-2002 10:43 PM
Duration and overlap play the biggest role in idle quality. Lift is not a factor. Maybe he has his timing advanced to smooth it out a little.  SteveW
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chips67
Gearhead Posts: 556
From: louisville, ky, usa
Registered: Jul 2001
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posted 04-02-2002 10:59 PM
i know what its like to be hit over the head with a smoothie. you know, that thing she smoothes the clothes out with.------------------
67 coupe, 650dp and rpm intake on 5.0 with afr 165 heads, 4 speed, 4.11's.....best so far is [email protected] in 1/8 mile with 1.79 60ft. time.
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chips67
Gearhead Posts: 556
From: louisville, ky, usa
Registered: Jul 2001
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posted 04-03-2002 10:25 PM
yeah steves right. a cam with a a wide lsa and minimal overlap will idle much tamer and actually quieter than the right cam will. if you are good with a sawzall and an arc welder you can cut between each exaust and intake lobe and re-weld the seam once the desired overlap is achieved. the only drawback is you will have to repaint your cam bearings, rotate the lugs, and run synthetic washer fluid for the first 100 miles after service. OR you could replace the cam. i KNOW what i'd do, i didnt buy this welder just to fix computers and vcr's all day! good luck.------------------
67 coupe, 650dp and rpm intake on 5.0 with afr 165 heads, 4 speed, 4.11's.....best so far is [email protected] in 1/8 mile with 1.79 60ft. time.
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clevelandstyle
Gearhead Posts: 184
From: Connersville, IN
Registered: Jul 2001
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posted 04-03-2002 10:36 PM
Chip,
What kind of meds are you on? I want some.  ------------------
Ben
Grabber Green '70 Mach I 351C 4V
Robbin Egg Blue '79 Fairmont 351C 4V
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steve'66
Gearhead Posts: 3698
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 04-03-2002 10:47 PM
ME TOO CHIP!You gotta share!
SteveW
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67Coupster
Journeyman Posts: 72
From: Fortson, GA, USA
Registered: Oct 2001
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posted 04-04-2002 05:57 AM
quote:
Originally posted by clevelandstyle:
Chip,
What kind of meds are you on? I want some.
You guys are cracking me up! Chip that comment on the other thread about "I'll guess they will hire anybody" was too funny. Talk to ya later. ------------------
James
67 Coupe
393W, AFR 185, 4 Speed, 4.11 9 inch
7.09 @ 97MPH 1/8
1.55 60'
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cpmaverick
Moderator Posts: 1265
From: Auburn, AL.
Registered: Jan 2000
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posted 04-04-2002 06:12 AM
A smaller displacement engine will have a 'rougher' idle than a larger one with the same size cam.If all you want is a 'rough' idle though, I've got a blown power valve and a couple bad spark plug wires for sale ------------------
-Charlie Ping
1970 Maverick Grabber
[email protected] with AC and overdrive.
http://www.maverickgrabber.com
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a351must2
Gearhead Posts: 318
From: Snohomish, WA, USA
Registered: Jun 99
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posted 04-05-2002 12:55 PM
Just an example of the same:My 362ci Windsor has a 298/292 Intake/Exhaust advertised duration, but idles perfect at 1000rpm and only has a slight lope at 750rpm. The trick to mine is that it's only 224/228 Intake and Exhaust at 0.050" lift, and it was rotated to a 114 degree intake centerline. The cam was ground to give me an idle that I could use with a stock stall speed automatic and enough overlap to run 11:1 compression with 92 octane fuel and proper timing.
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chips67
Gearhead Posts: 556
From: louisville, ky, usa
Registered: Jul 2001
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posted 04-05-2002 08:21 PM
advertised duration numbers are like hairy buttholes. duration at .050 helps keep the numbers straight and comparable. ------------------
67 coupe, 650dp and rpm intake on 5.0 with afr 165 heads, 4 speed, 4.11's.....best so far is [email protected] in 1/8 mile with 1.79 60ft. time.
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