Another cam advice thread....
Thread Starter
Melting Slicks
Joined: Oct 2011
Posts: 2,748
Likes: 90
From: Sacramento California
C2 of Year Finalist (performance mods) 2019
2018 C2 of Year Finalist
Another cam advice thread....
Seeking suggestions not a flame war...
78 vette, L82 stock bottom end.
AFR 195 heads 64 cc. (10.2:1 ?)
Performer intake w QJ.
Shorty headers with dual exhaust w/ dual cats.
Auto (5 speed upgrade in the future)
Needs to pass the DEQ sniffer...
Want to swap in a Roller cam.
Considering this one from Comp Cams:
XR 276 HR
224/230 @ .050
.502/.510 lift
110 degree lobe sep
Id go 282 or Solid roller if I thought i could pass emissions.
78 vette, L82 stock bottom end.
AFR 195 heads 64 cc. (10.2:1 ?)
Performer intake w QJ.
Shorty headers with dual exhaust w/ dual cats.
Auto (5 speed upgrade in the future)
Needs to pass the DEQ sniffer...
Want to swap in a Roller cam.
Considering this one from Comp Cams:
XR 276 HR
224/230 @ .050
.502/.510 lift
110 degree lobe sep
Id go 282 or Solid roller if I thought i could pass emissions.
Thread Starter
Melting Slicks
Joined: Oct 2011
Posts: 2,748
Likes: 90
From: Sacramento California
C2 of Year Finalist (performance mods) 2019
2018 C2 of Year Finalist
Burning Brakes
Joined: Apr 2007
Posts: 1,039
Likes: 62
From: Kona Hawaii
Collecting parts for a roller cam swap.Got the retro lifters and a Crane Cam 119821,billet core with iron gear.Went with a conservative cam for my street cruiser.Watch what you buy not all cams are created equal.Ask if there cams are billet and you want a pressed on distributor iron gear to avoid future problems.You'll also need a different fuel pump pushrod.I'm going with the Howard's Cam polymer pushrod...Good luck...
Last edited by iokepakai; Nov 26, 2012 at 10:31 PM.
Thread Starter
Melting Slicks
Joined: Oct 2011
Posts: 2,748
Likes: 90
From: Sacramento California
C2 of Year Finalist (performance mods) 2019
2018 C2 of Year Finalist
Crane version:
HR 284
222/230 @ .050
.509/.528
112 lobe sep
Lunati: 270/278
Advertised Duration (Int/Exh): 270/278
Duration @ .050 (Int/Exh): 219/227
Gross Valve Lift (Int/Exh): .515/.530
LSA/ICL: 112/106
Lunati 278/288
dvertised Duration (Intake/Exhaust) 278/288
Duration @.050" (Intake/Exhaust) 232/242
Gross Valve Lift (Intake/Exhaust) .507"/.507"
Lobe Seperation 112
HR 284
222/230 @ .050
.509/.528
112 lobe sep
Lunati: 270/278
Advertised Duration (Int/Exh): 270/278
Duration @ .050 (Int/Exh): 219/227
Gross Valve Lift (Int/Exh): .515/.530
LSA/ICL: 112/106
Lunati 278/288
dvertised Duration (Intake/Exhaust) 278/288
Duration @.050" (Intake/Exhaust) 232/242
Gross Valve Lift (Intake/Exhaust) .507"/.507"
Lobe Seperation 112
Last edited by DucatiDon; Nov 26, 2012 at 10:34 PM.
Race Director
Joined: May 2005
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From: Millington Illinois
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Melting Slicks
Joined: Oct 2006
Posts: 2,417
Likes: 336
From: Texas
basically same setup as yours, L82 bottom, dart heads, qjet, duals, 2k stall,
cam , fairly smooth idle, but you do notice it, good vacuum and low end power. But, i dont have to pass anything as far as inspec.
http://www.competitionproducts.com/H...o/CL110245-12/
Chev SB Retro-Fit
Adv. Duration: 275/284
Duration @ .050": 225/231
Lift: .500/.510
Lobe Separation: 112 LC
1800-5400. Fair idle, street & mild performance usage. Crisp throttle.
In Stock
cam , fairly smooth idle, but you do notice it, good vacuum and low end power. But, i dont have to pass anything as far as inspec.
http://www.competitionproducts.com/H...o/CL110245-12/
Chev SB Retro-Fit
Adv. Duration: 275/284
Duration @ .050": 225/231
Lift: .500/.510
Lobe Separation: 112 LC
1800-5400. Fair idle, street & mild performance usage. Crisp throttle.
In Stock
Last edited by speedreed8; Nov 27, 2012 at 01:07 PM.
Drifting
Joined: Nov 2002
Posts: 1,692
Likes: 208
From: Loveland, CO
I've been advised to subtract about 16 degrees from a flat tappet specs. to get to a comparable roller cam (don't know what you have currently). Some of the suggestions may be aiming too high for a street/emissions car.
Ralph
Ralph
Last edited by rponfick; Nov 27, 2012 at 03:13 PM.
Thread Starter
Melting Slicks
Joined: Oct 2011
Posts: 2,748
Likes: 90
From: Sacramento California
C2 of Year Finalist (performance mods) 2019
2018 C2 of Year Finalist
I think Ill try this one from Lunati:
20120711
Lunati: 270/278
Advertised Duration (Int/Exh): 270/278
Duration @ .050 (Int/Exh): 219/227
Gross Valve Lift (Int/Exh): .515/.530
LSA/ICL: 112/106
20120711
Lunati: 270/278
Advertised Duration (Int/Exh): 270/278
Duration @ .050 (Int/Exh): 219/227
Gross Valve Lift (Int/Exh): .515/.530
LSA/ICL: 112/106
