406 Cam choice [Archive] - Chevelle Tech

: 406 Cam choice


MickyT
Jan 29th, 07, 11:07 AM
I previously posted and got some recommendations on a cam for our build. The combo is:
We are currently building a 509 casting 400. Scat forged rotating assembly with Scat 5.7 I beam rods, KB forged pistons 9.8 compression. Block did not require decking. AFR 195 Eliminator heads, 1.5 Harland Sharp roller rockers with Performer RPM intake. Going into a 67 Camaro with Turbo 350 with Gear Vendor and currently 4.10 rearend which will likely change to 3.55 or 3.42 in the future. Has new 1800 stall converter now that probably needs to be upgraded (suggestions).

I have run across this Isky hydraulic roller and wonder if it would be a good choice as I can get at a substantial discount.
Does this look like a good choice?
Grind: RR-282 HYD
108 lobe center, cam advance 1.5 degrees
Intake timing: 282 DEG Exhaust timing: 282 DEG
Open 36 before TDC Open 72 before TDC
Close 66 after BDC Close 30 after TDC
Cam lift .353 Cam lift .353
Valve lift .530 Valve lift .530
Overlap 66 DEG Lobe Center 108 DEG Cam advance 1.5 DEG
At .050
Intake duration 234, open 12 BTDC close 42 ABDC
Exhaust duration 234, open 48 BBDC close 6 ATDC

Thanks for any help you can give.

sschevellefan
Jan 29th, 07, 11:15 AM
I think it would be a pretty good cam. my buddy has a similar 406 and he is running a comp XE hyd roller 276/282 224/230@.050 .502/.510 110LSA. It`s in a 68 camaro with a 4spd and 2.73 gears for now but it has a nice idle and has a ton of power.

Dave427
Jan 29th, 07, 11:27 AM
When company's build cams for small blocks they base them on 350's . So if your cam you are buying is rated for like 2500-6500 , in a 406 its like 2000-6000 . Whats the RPM range of that cam? How high do you want to ring it? A stock stall is approximately 1500 RPM , I'm not sure how much a 1800 stall will benefit you . Start with like a 3000 that Performer RPM works well but they do kill a bit in the bottom end.

Dave

DOUG G
Jan 29th, 07, 5:33 PM
Roller cams make more power... plain and simple.

Now to compare...
I was running a 406,280H CompCam (230 @ .050, .486 I/E) 10.17:1 compression,3000 10" converter, and 3.73's in a 3450 lb. Camaro, and ran the times below.
That roller should make ??? 50hp ??? more easy and get you to maybe a 12.0 estimated.

hoffbug
Jan 29th, 07, 6:29 PM
What are your plans for the car? I think Id decide on rear gear before settling on a cam profile.

MickyT
Jan 29th, 07, 11:12 PM
Its a fun occasional driver.The 4.10s will likely stay for awhile as we have the Gear Vendor overdrive to tame highway cruising. If we do decide on more touring we may change to 3.55s or so then.

Brettd85
Jan 29th, 07, 11:17 PM
http://www.chevyhiperformance.com/techarticles/6113_chevrolet_406_ci_small_block_build/

Check out the cam and heads they used. Might not help... Just a shot. This is the engine I plan on building.